1193326Sed//===--- SemaType.cpp - Semantic Analysis for Types -----------------------===// 2193326Sed// 3193326Sed// The LLVM Compiler Infrastructure 4193326Sed// 5193326Sed// This file is distributed under the University of Illinois Open Source 6193326Sed// License. See LICENSE.TXT for details. 7193326Sed// 8193326Sed//===----------------------------------------------------------------------===// 9193326Sed// 10193326Sed// This file implements type-related semantic analysis. 11193326Sed// 12193326Sed//===----------------------------------------------------------------------===// 13193326Sed 14212904Sdim#include "clang/Sema/SemaInternal.h" 15263508Sdim#include "clang/AST/ASTConsumer.h" 16193326Sed#include "clang/AST/ASTContext.h" 17223017Sdim#include "clang/AST/ASTMutationListener.h" 18198092Srdivacky#include "clang/AST/CXXInheritance.h" 19193326Sed#include "clang/AST/DeclObjC.h" 20193326Sed#include "clang/AST/DeclTemplate.h" 21249423Sdim#include "clang/AST/Expr.h" 22198092Srdivacky#include "clang/AST/TypeLoc.h" 23198398Srdivacky#include "clang/AST/TypeLocVisitor.h" 24249423Sdim#include "clang/Basic/OpenCL.h" 25198092Srdivacky#include "clang/Basic/PartialDiagnostic.h" 26212904Sdim#include "clang/Basic/TargetInfo.h" 27221345Sdim#include "clang/Lex/Preprocessor.h" 28234353Sdim#include "clang/Parse/ParseDiagnostic.h" 29212904Sdim#include "clang/Sema/DeclSpec.h" 30224145Sdim#include "clang/Sema/DelayedDiagnostic.h" 31234353Sdim#include "clang/Sema/Lookup.h" 32249423Sdim#include "clang/Sema/ScopeInfo.h" 33249423Sdim#include "clang/Sema/Template.h" 34195341Sed#include "llvm/ADT/SmallPtrSet.h" 35249423Sdim#include "llvm/ADT/SmallString.h" 36198954Srdivacky#include "llvm/Support/ErrorHandling.h" 37263508Sdim#include "TypeLocBuilder.h" 38263508Sdim 39193326Sedusing namespace clang; 40193326Sed 41263508Sdimenum TypeDiagSelector { 42263508Sdim TDS_Function, 43263508Sdim TDS_Pointer, 44263508Sdim TDS_ObjCObjOrBlock 45263508Sdim}; 46263508Sdim 47198893Srdivacky/// isOmittedBlockReturnType - Return true if this declarator is missing a 48239462Sdim/// return type because this is a omitted return type on a block literal. 49198893Srdivackystatic bool isOmittedBlockReturnType(const Declarator &D) { 50198893Srdivacky if (D.getContext() != Declarator::BlockLiteralContext || 51198893Srdivacky D.getDeclSpec().hasTypeSpecifier()) 52198893Srdivacky return false; 53239462Sdim 54198893Srdivacky if (D.getNumTypeObjects() == 0) 55198893Srdivacky return true; // ^{ ... } 56239462Sdim 57198893Srdivacky if (D.getNumTypeObjects() == 1 && 58198893Srdivacky D.getTypeObject(0).Kind == DeclaratorChunk::Function) 59198893Srdivacky return true; // ^(int X, float Y) { ... } 60239462Sdim 61198893Srdivacky return false; 62198893Srdivacky} 63198893Srdivacky 64221345Sdim/// diagnoseBadTypeAttribute - Diagnoses a type attribute which 65221345Sdim/// doesn't apply to the given type. 66221345Sdimstatic void diagnoseBadTypeAttribute(Sema &S, const AttributeList &attr, 67221345Sdim QualType type) { 68263508Sdim TypeDiagSelector WhichType; 69263508Sdim bool useExpansionLoc = true; 70221345Sdim switch (attr.getKind()) { 71263508Sdim case AttributeList::AT_ObjCGC: WhichType = TDS_Pointer; break; 72263508Sdim case AttributeList::AT_ObjCOwnership: WhichType = TDS_ObjCObjOrBlock; break; 73221345Sdim default: 74221345Sdim // Assume everything else was a function attribute. 75263508Sdim WhichType = TDS_Function; 76263508Sdim useExpansionLoc = false; 77221345Sdim break; 78221345Sdim } 79221345Sdim 80221345Sdim SourceLocation loc = attr.getLoc(); 81226633Sdim StringRef name = attr.getName()->getName(); 82221345Sdim 83221345Sdim // The GC attributes are usually written with macros; special-case them. 84263508Sdim IdentifierInfo *II = attr.isArgIdent(0) ? attr.getArgAsIdent(0)->Ident : 0; 85263508Sdim if (useExpansionLoc && loc.isMacroID() && II) { 86263508Sdim if (II->isStr("strong")) { 87221345Sdim if (S.findMacroSpelling(loc, "__strong")) name = "__strong"; 88263508Sdim } else if (II->isStr("weak")) { 89221345Sdim if (S.findMacroSpelling(loc, "__weak")) name = "__weak"; 90221345Sdim } 91221345Sdim } 92221345Sdim 93263508Sdim S.Diag(loc, diag::warn_type_attribute_wrong_type) << name << WhichType 94263508Sdim << type; 95221345Sdim} 96221345Sdim 97218893Sdim// objc_gc applies to Objective-C pointers or, otherwise, to the 98218893Sdim// smallest available pointer type (i.e. 'void*' in 'void**'). 99218893Sdim#define OBJC_POINTER_TYPE_ATTRS_CASELIST \ 100239462Sdim case AttributeList::AT_ObjCGC: \ 101239462Sdim case AttributeList::AT_ObjCOwnership 102203955Srdivacky 103218893Sdim// Function type attributes. 104218893Sdim#define FUNCTION_TYPE_ATTRS_CASELIST \ 105239462Sdim case AttributeList::AT_NoReturn: \ 106239462Sdim case AttributeList::AT_CDecl: \ 107239462Sdim case AttributeList::AT_FastCall: \ 108239462Sdim case AttributeList::AT_StdCall: \ 109239462Sdim case AttributeList::AT_ThisCall: \ 110239462Sdim case AttributeList::AT_Pascal: \ 111256030Sdim case AttributeList::AT_MSABI: \ 112256030Sdim case AttributeList::AT_SysVABI: \ 113239462Sdim case AttributeList::AT_Regparm: \ 114243830Sdim case AttributeList::AT_Pcs: \ 115249423Sdim case AttributeList::AT_PnaclCall: \ 116263508Sdim case AttributeList::AT_IntelOclBicc 117203955Srdivacky 118263508Sdim// Microsoft-specific type qualifiers. 119263508Sdim#define MS_TYPE_ATTRS_CASELIST \ 120263508Sdim case AttributeList::AT_Ptr32: \ 121263508Sdim case AttributeList::AT_Ptr64: \ 122263508Sdim case AttributeList::AT_SPtr: \ 123263508Sdim case AttributeList::AT_UPtr 124263508Sdim 125218893Sdimnamespace { 126218893Sdim /// An object which stores processing state for the entire 127218893Sdim /// GetTypeForDeclarator process. 128218893Sdim class TypeProcessingState { 129218893Sdim Sema &sema; 130218893Sdim 131218893Sdim /// The declarator being processed. 132218893Sdim Declarator &declarator; 133218893Sdim 134218893Sdim /// The index of the declarator chunk we're currently processing. 135218893Sdim /// May be the total number of valid chunks, indicating the 136218893Sdim /// DeclSpec. 137218893Sdim unsigned chunkIndex; 138218893Sdim 139218893Sdim /// Whether there are non-trivial modifications to the decl spec. 140218893Sdim bool trivial; 141218893Sdim 142221345Sdim /// Whether we saved the attributes in the decl spec. 143221345Sdim bool hasSavedAttrs; 144221345Sdim 145218893Sdim /// The original set of attributes on the DeclSpec. 146226633Sdim SmallVector<AttributeList*, 2> savedAttrs; 147218893Sdim 148218893Sdim /// A list of attributes to diagnose the uselessness of when the 149218893Sdim /// processing is complete. 150226633Sdim SmallVector<AttributeList*, 2> ignoredTypeAttrs; 151218893Sdim 152218893Sdim public: 153218893Sdim TypeProcessingState(Sema &sema, Declarator &declarator) 154218893Sdim : sema(sema), declarator(declarator), 155218893Sdim chunkIndex(declarator.getNumTypeObjects()), 156221345Sdim trivial(true), hasSavedAttrs(false) {} 157218893Sdim 158218893Sdim Sema &getSema() const { 159218893Sdim return sema; 160207619Srdivacky } 161218893Sdim 162218893Sdim Declarator &getDeclarator() const { 163218893Sdim return declarator; 164218893Sdim } 165218893Sdim 166249423Sdim bool isProcessingDeclSpec() const { 167249423Sdim return chunkIndex == declarator.getNumTypeObjects(); 168249423Sdim } 169249423Sdim 170218893Sdim unsigned getCurrentChunkIndex() const { 171218893Sdim return chunkIndex; 172218893Sdim } 173218893Sdim 174218893Sdim void setCurrentChunkIndex(unsigned idx) { 175218893Sdim assert(idx <= declarator.getNumTypeObjects()); 176218893Sdim chunkIndex = idx; 177218893Sdim } 178218893Sdim 179218893Sdim AttributeList *&getCurrentAttrListRef() const { 180249423Sdim if (isProcessingDeclSpec()) 181218893Sdim return getMutableDeclSpec().getAttributes().getListRef(); 182218893Sdim return declarator.getTypeObject(chunkIndex).getAttrListRef(); 183218893Sdim } 184218893Sdim 185218893Sdim /// Save the current set of attributes on the DeclSpec. 186218893Sdim void saveDeclSpecAttrs() { 187218893Sdim // Don't try to save them multiple times. 188221345Sdim if (hasSavedAttrs) return; 189218893Sdim 190218893Sdim DeclSpec &spec = getMutableDeclSpec(); 191218893Sdim for (AttributeList *attr = spec.getAttributes().getList(); attr; 192218893Sdim attr = attr->getNext()) 193218893Sdim savedAttrs.push_back(attr); 194218893Sdim trivial &= savedAttrs.empty(); 195221345Sdim hasSavedAttrs = true; 196218893Sdim } 197218893Sdim 198218893Sdim /// Record that we had nowhere to put the given type attribute. 199218893Sdim /// We will diagnose such attributes later. 200218893Sdim void addIgnoredTypeAttr(AttributeList &attr) { 201218893Sdim ignoredTypeAttrs.push_back(&attr); 202218893Sdim } 203218893Sdim 204218893Sdim /// Diagnose all the ignored type attributes, given that the 205218893Sdim /// declarator worked out to the given type. 206218893Sdim void diagnoseIgnoredTypeAttrs(QualType type) const { 207226633Sdim for (SmallVectorImpl<AttributeList*>::const_iterator 208218893Sdim i = ignoredTypeAttrs.begin(), e = ignoredTypeAttrs.end(); 209221345Sdim i != e; ++i) 210221345Sdim diagnoseBadTypeAttribute(getSema(), **i, type); 211218893Sdim } 212218893Sdim 213218893Sdim ~TypeProcessingState() { 214218893Sdim if (trivial) return; 215218893Sdim 216218893Sdim restoreDeclSpecAttrs(); 217218893Sdim } 218218893Sdim 219218893Sdim private: 220218893Sdim DeclSpec &getMutableDeclSpec() const { 221218893Sdim return const_cast<DeclSpec&>(declarator.getDeclSpec()); 222218893Sdim } 223218893Sdim 224218893Sdim void restoreDeclSpecAttrs() { 225221345Sdim assert(hasSavedAttrs); 226221345Sdim 227221345Sdim if (savedAttrs.empty()) { 228221345Sdim getMutableDeclSpec().getAttributes().set(0); 229221345Sdim return; 230221345Sdim } 231221345Sdim 232218893Sdim getMutableDeclSpec().getAttributes().set(savedAttrs[0]); 233218893Sdim for (unsigned i = 0, e = savedAttrs.size() - 1; i != e; ++i) 234218893Sdim savedAttrs[i]->setNext(savedAttrs[i+1]); 235218893Sdim savedAttrs.back()->setNext(0); 236218893Sdim } 237218893Sdim }; 238203955Srdivacky} 239203955Srdivacky 240218893Sdimstatic void spliceAttrIntoList(AttributeList &attr, AttributeList *&head) { 241218893Sdim attr.setNext(head); 242218893Sdim head = &attr; 243218893Sdim} 244218893Sdim 245218893Sdimstatic void spliceAttrOutOfList(AttributeList &attr, AttributeList *&head) { 246218893Sdim if (head == &attr) { 247218893Sdim head = attr.getNext(); 248218893Sdim return; 249203955Srdivacky } 250218893Sdim 251218893Sdim AttributeList *cur = head; 252218893Sdim while (true) { 253218893Sdim assert(cur && cur->getNext() && "ran out of attrs?"); 254218893Sdim if (cur->getNext() == &attr) { 255218893Sdim cur->setNext(attr.getNext()); 256218893Sdim return; 257218893Sdim } 258218893Sdim cur = cur->getNext(); 259218893Sdim } 260203955Srdivacky} 261203955Srdivacky 262218893Sdimstatic void moveAttrFromListToList(AttributeList &attr, 263218893Sdim AttributeList *&fromList, 264218893Sdim AttributeList *&toList) { 265218893Sdim spliceAttrOutOfList(attr, fromList); 266218893Sdim spliceAttrIntoList(attr, toList); 267218893Sdim} 268218893Sdim 269249423Sdim/// The location of a type attribute. 270249423Sdimenum TypeAttrLocation { 271249423Sdim /// The attribute is in the decl-specifier-seq. 272249423Sdim TAL_DeclSpec, 273249423Sdim /// The attribute is part of a DeclaratorChunk. 274249423Sdim TAL_DeclChunk, 275249423Sdim /// The attribute is immediately after the declaration's name. 276249423Sdim TAL_DeclName 277249423Sdim}; 278249423Sdim 279218893Sdimstatic void processTypeAttrs(TypeProcessingState &state, 280249423Sdim QualType &type, TypeAttrLocation TAL, 281218893Sdim AttributeList *attrs); 282218893Sdim 283218893Sdimstatic bool handleFunctionTypeAttr(TypeProcessingState &state, 284218893Sdim AttributeList &attr, 285218893Sdim QualType &type); 286218893Sdim 287263508Sdimstatic bool handleMSPointerTypeQualifierAttr(TypeProcessingState &state, 288263508Sdim AttributeList &attr, 289263508Sdim QualType &type); 290263508Sdim 291218893Sdimstatic bool handleObjCGCTypeAttr(TypeProcessingState &state, 292218893Sdim AttributeList &attr, QualType &type); 293218893Sdim 294224145Sdimstatic bool handleObjCOwnershipTypeAttr(TypeProcessingState &state, 295224145Sdim AttributeList &attr, QualType &type); 296224145Sdim 297218893Sdimstatic bool handleObjCPointerTypeAttr(TypeProcessingState &state, 298218893Sdim AttributeList &attr, QualType &type) { 299239462Sdim if (attr.getKind() == AttributeList::AT_ObjCGC) 300224145Sdim return handleObjCGCTypeAttr(state, attr, type); 301239462Sdim assert(attr.getKind() == AttributeList::AT_ObjCOwnership); 302224145Sdim return handleObjCOwnershipTypeAttr(state, attr, type); 303218893Sdim} 304218893Sdim 305249423Sdim/// Given the index of a declarator chunk, check whether that chunk 306249423Sdim/// directly specifies the return type of a function and, if so, find 307249423Sdim/// an appropriate place for it. 308249423Sdim/// 309249423Sdim/// \param i - a notional index which the search will start 310249423Sdim/// immediately inside 311249423Sdimstatic DeclaratorChunk *maybeMovePastReturnType(Declarator &declarator, 312249423Sdim unsigned i) { 313249423Sdim assert(i <= declarator.getNumTypeObjects()); 314249423Sdim 315249423Sdim DeclaratorChunk *result = 0; 316249423Sdim 317249423Sdim // First, look inwards past parens for a function declarator. 318249423Sdim for (; i != 0; --i) { 319249423Sdim DeclaratorChunk &fnChunk = declarator.getTypeObject(i-1); 320249423Sdim switch (fnChunk.Kind) { 321249423Sdim case DeclaratorChunk::Paren: 322249423Sdim continue; 323249423Sdim 324249423Sdim // If we find anything except a function, bail out. 325249423Sdim case DeclaratorChunk::Pointer: 326249423Sdim case DeclaratorChunk::BlockPointer: 327249423Sdim case DeclaratorChunk::Array: 328249423Sdim case DeclaratorChunk::Reference: 329249423Sdim case DeclaratorChunk::MemberPointer: 330249423Sdim return result; 331249423Sdim 332249423Sdim // If we do find a function declarator, scan inwards from that, 333249423Sdim // looking for a block-pointer declarator. 334249423Sdim case DeclaratorChunk::Function: 335249423Sdim for (--i; i != 0; --i) { 336249423Sdim DeclaratorChunk &blockChunk = declarator.getTypeObject(i-1); 337249423Sdim switch (blockChunk.Kind) { 338249423Sdim case DeclaratorChunk::Paren: 339249423Sdim case DeclaratorChunk::Pointer: 340249423Sdim case DeclaratorChunk::Array: 341249423Sdim case DeclaratorChunk::Function: 342249423Sdim case DeclaratorChunk::Reference: 343249423Sdim case DeclaratorChunk::MemberPointer: 344249423Sdim continue; 345249423Sdim case DeclaratorChunk::BlockPointer: 346249423Sdim result = &blockChunk; 347249423Sdim goto continue_outer; 348249423Sdim } 349249423Sdim llvm_unreachable("bad declarator chunk kind"); 350249423Sdim } 351249423Sdim 352249423Sdim // If we run out of declarators doing that, we're done. 353249423Sdim return result; 354249423Sdim } 355249423Sdim llvm_unreachable("bad declarator chunk kind"); 356249423Sdim 357249423Sdim // Okay, reconsider from our new point. 358249423Sdim continue_outer: ; 359249423Sdim } 360249423Sdim 361249423Sdim // Ran out of chunks, bail out. 362249423Sdim return result; 363249423Sdim} 364249423Sdim 365218893Sdim/// Given that an objc_gc attribute was written somewhere on a 366218893Sdim/// declaration *other* than on the declarator itself (for which, use 367218893Sdim/// distributeObjCPointerTypeAttrFromDeclarator), and given that it 368218893Sdim/// didn't apply in whatever position it was written in, try to move 369218893Sdim/// it to a more appropriate position. 370218893Sdimstatic void distributeObjCPointerTypeAttr(TypeProcessingState &state, 371218893Sdim AttributeList &attr, 372218893Sdim QualType type) { 373218893Sdim Declarator &declarator = state.getDeclarator(); 374249423Sdim 375249423Sdim // Move it to the outermost normal or block pointer declarator. 376218893Sdim for (unsigned i = state.getCurrentChunkIndex(); i != 0; --i) { 377218893Sdim DeclaratorChunk &chunk = declarator.getTypeObject(i-1); 378218893Sdim switch (chunk.Kind) { 379218893Sdim case DeclaratorChunk::Pointer: 380249423Sdim case DeclaratorChunk::BlockPointer: { 381249423Sdim // But don't move an ARC ownership attribute to the return type 382249423Sdim // of a block. 383249423Sdim DeclaratorChunk *destChunk = 0; 384249423Sdim if (state.isProcessingDeclSpec() && 385249423Sdim attr.getKind() == AttributeList::AT_ObjCOwnership) 386249423Sdim destChunk = maybeMovePastReturnType(declarator, i - 1); 387249423Sdim if (!destChunk) destChunk = &chunk; 388249423Sdim 389218893Sdim moveAttrFromListToList(attr, state.getCurrentAttrListRef(), 390249423Sdim destChunk->getAttrListRef()); 391218893Sdim return; 392249423Sdim } 393218893Sdim 394218893Sdim case DeclaratorChunk::Paren: 395218893Sdim case DeclaratorChunk::Array: 396218893Sdim continue; 397218893Sdim 398249423Sdim // We may be starting at the return type of a block. 399249423Sdim case DeclaratorChunk::Function: 400249423Sdim if (state.isProcessingDeclSpec() && 401249423Sdim attr.getKind() == AttributeList::AT_ObjCOwnership) { 402249423Sdim if (DeclaratorChunk *dest = maybeMovePastReturnType(declarator, i)) { 403249423Sdim moveAttrFromListToList(attr, state.getCurrentAttrListRef(), 404249423Sdim dest->getAttrListRef()); 405249423Sdim return; 406249423Sdim } 407249423Sdim } 408249423Sdim goto error; 409249423Sdim 410218893Sdim // Don't walk through these. 411218893Sdim case DeclaratorChunk::Reference: 412218893Sdim case DeclaratorChunk::MemberPointer: 413218893Sdim goto error; 414218893Sdim } 415218893Sdim } 416218893Sdim error: 417221345Sdim 418221345Sdim diagnoseBadTypeAttribute(state.getSema(), attr, type); 419218893Sdim} 420218893Sdim 421218893Sdim/// Distribute an objc_gc type attribute that was written on the 422218893Sdim/// declarator. 423218893Sdimstatic void 424218893SdimdistributeObjCPointerTypeAttrFromDeclarator(TypeProcessingState &state, 425218893Sdim AttributeList &attr, 426218893Sdim QualType &declSpecType) { 427218893Sdim Declarator &declarator = state.getDeclarator(); 428218893Sdim 429218893Sdim // objc_gc goes on the innermost pointer to something that's not a 430218893Sdim // pointer. 431218893Sdim unsigned innermost = -1U; 432218893Sdim bool considerDeclSpec = true; 433218893Sdim for (unsigned i = 0, e = declarator.getNumTypeObjects(); i != e; ++i) { 434218893Sdim DeclaratorChunk &chunk = declarator.getTypeObject(i); 435218893Sdim switch (chunk.Kind) { 436218893Sdim case DeclaratorChunk::Pointer: 437218893Sdim case DeclaratorChunk::BlockPointer: 438218893Sdim innermost = i; 439218893Sdim continue; 440218893Sdim 441218893Sdim case DeclaratorChunk::Reference: 442218893Sdim case DeclaratorChunk::MemberPointer: 443218893Sdim case DeclaratorChunk::Paren: 444218893Sdim case DeclaratorChunk::Array: 445218893Sdim continue; 446218893Sdim 447218893Sdim case DeclaratorChunk::Function: 448218893Sdim considerDeclSpec = false; 449218893Sdim goto done; 450218893Sdim } 451218893Sdim } 452218893Sdim done: 453218893Sdim 454218893Sdim // That might actually be the decl spec if we weren't blocked by 455218893Sdim // anything in the declarator. 456218893Sdim if (considerDeclSpec) { 457221345Sdim if (handleObjCPointerTypeAttr(state, attr, declSpecType)) { 458221345Sdim // Splice the attribute into the decl spec. Prevents the 459221345Sdim // attribute from being applied multiple times and gives 460221345Sdim // the source-location-filler something to work with. 461221345Sdim state.saveDeclSpecAttrs(); 462221345Sdim moveAttrFromListToList(attr, declarator.getAttrListRef(), 463221345Sdim declarator.getMutableDeclSpec().getAttributes().getListRef()); 464218893Sdim return; 465221345Sdim } 466218893Sdim } 467218893Sdim 468218893Sdim // Otherwise, if we found an appropriate chunk, splice the attribute 469218893Sdim // into it. 470218893Sdim if (innermost != -1U) { 471218893Sdim moveAttrFromListToList(attr, declarator.getAttrListRef(), 472218893Sdim declarator.getTypeObject(innermost).getAttrListRef()); 473218893Sdim return; 474218893Sdim } 475218893Sdim 476218893Sdim // Otherwise, diagnose when we're done building the type. 477218893Sdim spliceAttrOutOfList(attr, declarator.getAttrListRef()); 478218893Sdim state.addIgnoredTypeAttr(attr); 479218893Sdim} 480218893Sdim 481218893Sdim/// A function type attribute was written somewhere in a declaration 482218893Sdim/// *other* than on the declarator itself or in the decl spec. Given 483218893Sdim/// that it didn't apply in whatever position it was written in, try 484218893Sdim/// to move it to a more appropriate position. 485218893Sdimstatic void distributeFunctionTypeAttr(TypeProcessingState &state, 486218893Sdim AttributeList &attr, 487218893Sdim QualType type) { 488218893Sdim Declarator &declarator = state.getDeclarator(); 489218893Sdim 490218893Sdim // Try to push the attribute from the return type of a function to 491218893Sdim // the function itself. 492218893Sdim for (unsigned i = state.getCurrentChunkIndex(); i != 0; --i) { 493218893Sdim DeclaratorChunk &chunk = declarator.getTypeObject(i-1); 494218893Sdim switch (chunk.Kind) { 495218893Sdim case DeclaratorChunk::Function: 496218893Sdim moveAttrFromListToList(attr, state.getCurrentAttrListRef(), 497218893Sdim chunk.getAttrListRef()); 498218893Sdim return; 499218893Sdim 500218893Sdim case DeclaratorChunk::Paren: 501218893Sdim case DeclaratorChunk::Pointer: 502218893Sdim case DeclaratorChunk::BlockPointer: 503218893Sdim case DeclaratorChunk::Array: 504218893Sdim case DeclaratorChunk::Reference: 505218893Sdim case DeclaratorChunk::MemberPointer: 506218893Sdim continue; 507218893Sdim } 508218893Sdim } 509239462Sdim 510221345Sdim diagnoseBadTypeAttribute(state.getSema(), attr, type); 511218893Sdim} 512218893Sdim 513218893Sdim/// Try to distribute a function type attribute to the innermost 514218893Sdim/// function chunk or type. Returns true if the attribute was 515218893Sdim/// distributed, false if no location was found. 516218893Sdimstatic bool 517218893SdimdistributeFunctionTypeAttrToInnermost(TypeProcessingState &state, 518218893Sdim AttributeList &attr, 519218893Sdim AttributeList *&attrList, 520218893Sdim QualType &declSpecType) { 521218893Sdim Declarator &declarator = state.getDeclarator(); 522218893Sdim 523218893Sdim // Put it on the innermost function chunk, if there is one. 524218893Sdim for (unsigned i = 0, e = declarator.getNumTypeObjects(); i != e; ++i) { 525218893Sdim DeclaratorChunk &chunk = declarator.getTypeObject(i); 526218893Sdim if (chunk.Kind != DeclaratorChunk::Function) continue; 527218893Sdim 528218893Sdim moveAttrFromListToList(attr, attrList, chunk.getAttrListRef()); 529218893Sdim return true; 530218893Sdim } 531218893Sdim 532263508Sdim return handleFunctionTypeAttr(state, attr, declSpecType); 533218893Sdim} 534218893Sdim 535218893Sdim/// A function type attribute was written in the decl spec. Try to 536218893Sdim/// apply it somewhere. 537218893Sdimstatic void 538218893SdimdistributeFunctionTypeAttrFromDeclSpec(TypeProcessingState &state, 539218893Sdim AttributeList &attr, 540218893Sdim QualType &declSpecType) { 541218893Sdim state.saveDeclSpecAttrs(); 542218893Sdim 543249423Sdim // C++11 attributes before the decl specifiers actually appertain to 544249423Sdim // the declarators. Move them straight there. We don't support the 545249423Sdim // 'put them wherever you like' semantics we allow for GNU attributes. 546249423Sdim if (attr.isCXX11Attribute()) { 547249423Sdim moveAttrFromListToList(attr, state.getCurrentAttrListRef(), 548249423Sdim state.getDeclarator().getAttrListRef()); 549249423Sdim return; 550249423Sdim } 551249423Sdim 552218893Sdim // Try to distribute to the innermost. 553218893Sdim if (distributeFunctionTypeAttrToInnermost(state, attr, 554218893Sdim state.getCurrentAttrListRef(), 555218893Sdim declSpecType)) 556218893Sdim return; 557218893Sdim 558218893Sdim // If that failed, diagnose the bad attribute when the declarator is 559218893Sdim // fully built. 560218893Sdim state.addIgnoredTypeAttr(attr); 561218893Sdim} 562218893Sdim 563218893Sdim/// A function type attribute was written on the declarator. Try to 564218893Sdim/// apply it somewhere. 565218893Sdimstatic void 566218893SdimdistributeFunctionTypeAttrFromDeclarator(TypeProcessingState &state, 567218893Sdim AttributeList &attr, 568218893Sdim QualType &declSpecType) { 569218893Sdim Declarator &declarator = state.getDeclarator(); 570218893Sdim 571218893Sdim // Try to distribute to the innermost. 572218893Sdim if (distributeFunctionTypeAttrToInnermost(state, attr, 573218893Sdim declarator.getAttrListRef(), 574218893Sdim declSpecType)) 575218893Sdim return; 576218893Sdim 577218893Sdim // If that failed, diagnose the bad attribute when the declarator is 578218893Sdim // fully built. 579218893Sdim spliceAttrOutOfList(attr, declarator.getAttrListRef()); 580218893Sdim state.addIgnoredTypeAttr(attr); 581218893Sdim} 582218893Sdim 583218893Sdim/// \brief Given that there are attributes written on the declarator 584218893Sdim/// itself, try to distribute any type attributes to the appropriate 585218893Sdim/// declarator chunk. 586218893Sdim/// 587218893Sdim/// These are attributes like the following: 588218893Sdim/// int f ATTR; 589218893Sdim/// int (f ATTR)(); 590218893Sdim/// but not necessarily this: 591218893Sdim/// int f() ATTR; 592218893Sdimstatic void distributeTypeAttrsFromDeclarator(TypeProcessingState &state, 593218893Sdim QualType &declSpecType) { 594218893Sdim // Collect all the type attributes from the declarator itself. 595218893Sdim assert(state.getDeclarator().getAttributes() && "declarator has no attrs!"); 596218893Sdim AttributeList *attr = state.getDeclarator().getAttributes(); 597218893Sdim AttributeList *next; 598218893Sdim do { 599218893Sdim next = attr->getNext(); 600218893Sdim 601249423Sdim // Do not distribute C++11 attributes. They have strict rules for what 602249423Sdim // they appertain to. 603249423Sdim if (attr->isCXX11Attribute()) 604249423Sdim continue; 605249423Sdim 606218893Sdim switch (attr->getKind()) { 607218893Sdim OBJC_POINTER_TYPE_ATTRS_CASELIST: 608218893Sdim distributeObjCPointerTypeAttrFromDeclarator(state, *attr, declSpecType); 609218893Sdim break; 610218893Sdim 611239462Sdim case AttributeList::AT_NSReturnsRetained: 612234353Sdim if (!state.getSema().getLangOpts().ObjCAutoRefCount) 613224145Sdim break; 614224145Sdim // fallthrough 615224145Sdim 616218893Sdim FUNCTION_TYPE_ATTRS_CASELIST: 617218893Sdim distributeFunctionTypeAttrFromDeclarator(state, *attr, declSpecType); 618218893Sdim break; 619218893Sdim 620263508Sdim MS_TYPE_ATTRS_CASELIST: 621263508Sdim // Microsoft type attributes cannot go after the declarator-id. 622263508Sdim continue; 623263508Sdim 624218893Sdim default: 625218893Sdim break; 626218893Sdim } 627218893Sdim } while ((attr = next)); 628218893Sdim} 629218893Sdim 630218893Sdim/// Add a synthetic '()' to a block-literal declarator if it is 631218893Sdim/// required, given the return type. 632218893Sdimstatic void maybeSynthesizeBlockSignature(TypeProcessingState &state, 633218893Sdim QualType declSpecType) { 634218893Sdim Declarator &declarator = state.getDeclarator(); 635218893Sdim 636218893Sdim // First, check whether the declarator would produce a function, 637218893Sdim // i.e. whether the innermost semantic chunk is a function. 638218893Sdim if (declarator.isFunctionDeclarator()) { 639218893Sdim // If so, make that declarator a prototyped declarator. 640218893Sdim declarator.getFunctionTypeInfo().hasPrototype = true; 641218893Sdim return; 642218893Sdim } 643218893Sdim 644218893Sdim // If there are any type objects, the type as written won't name a 645218893Sdim // function, regardless of the decl spec type. This is because a 646218893Sdim // block signature declarator is always an abstract-declarator, and 647218893Sdim // abstract-declarators can't just be parentheses chunks. Therefore 648218893Sdim // we need to build a function chunk unless there are no type 649218893Sdim // objects and the decl spec type is a function. 650218893Sdim if (!declarator.getNumTypeObjects() && declSpecType->isFunctionType()) 651218893Sdim return; 652218893Sdim 653218893Sdim // Note that there *are* cases with invalid declarators where 654218893Sdim // declarators consist solely of parentheses. In general, these 655218893Sdim // occur only in failed efforts to make function declarators, so 656218893Sdim // faking up the function chunk is still the right thing to do. 657218893Sdim 658218893Sdim // Otherwise, we need to fake up a function declarator. 659234353Sdim SourceLocation loc = declarator.getLocStart(); 660218893Sdim 661218893Sdim // ...and *prepend* it to the declarator. 662243830Sdim SourceLocation NoLoc; 663218893Sdim declarator.AddInnermostTypeInfo(DeclaratorChunk::getFunction( 664243830Sdim /*HasProto=*/true, 665243830Sdim /*IsAmbiguous=*/false, 666243830Sdim /*LParenLoc=*/NoLoc, 667243830Sdim /*ArgInfo=*/0, 668243830Sdim /*NumArgs=*/0, 669243830Sdim /*EllipsisLoc=*/NoLoc, 670243830Sdim /*RParenLoc=*/NoLoc, 671243830Sdim /*TypeQuals=*/0, 672243830Sdim /*RefQualifierIsLvalueRef=*/true, 673243830Sdim /*RefQualifierLoc=*/NoLoc, 674243830Sdim /*ConstQualifierLoc=*/NoLoc, 675243830Sdim /*VolatileQualifierLoc=*/NoLoc, 676243830Sdim /*MutableLoc=*/NoLoc, 677243830Sdim EST_None, 678243830Sdim /*ESpecLoc=*/NoLoc, 679243830Sdim /*Exceptions=*/0, 680243830Sdim /*ExceptionRanges=*/0, 681243830Sdim /*NumExceptions=*/0, 682243830Sdim /*NoexceptExpr=*/0, 683243830Sdim loc, loc, declarator)); 684218893Sdim 685218893Sdim // For consistency, make sure the state still has us as processing 686218893Sdim // the decl spec. 687218893Sdim assert(state.getCurrentChunkIndex() == declarator.getNumTypeObjects() - 1); 688218893Sdim state.setCurrentChunkIndex(declarator.getNumTypeObjects()); 689218893Sdim} 690218893Sdim 691193326Sed/// \brief Convert the specified declspec to the appropriate type 692193326Sed/// object. 693239462Sdim/// \param state Specifies the declarator containing the declaration specifier 694239462Sdim/// to be converted, along with other associated processing state. 695193326Sed/// \returns The type described by the declaration specifiers. This function 696193326Sed/// never returns null. 697224145Sdimstatic QualType ConvertDeclSpecToType(TypeProcessingState &state) { 698193326Sed // FIXME: Should move the logic from DeclSpec::Finish to here for validity 699193326Sed // checking. 700218893Sdim 701224145Sdim Sema &S = state.getSema(); 702218893Sdim Declarator &declarator = state.getDeclarator(); 703218893Sdim const DeclSpec &DS = declarator.getDeclSpec(); 704218893Sdim SourceLocation DeclLoc = declarator.getIdentifierLoc(); 705198893Srdivacky if (DeclLoc.isInvalid()) 706234353Sdim DeclLoc = DS.getLocStart(); 707239462Sdim 708218893Sdim ASTContext &Context = S.Context; 709198893Srdivacky 710193326Sed QualType Result; 711193326Sed switch (DS.getTypeSpecType()) { 712193326Sed case DeclSpec::TST_void: 713193326Sed Result = Context.VoidTy; 714193326Sed break; 715193326Sed case DeclSpec::TST_char: 716193326Sed if (DS.getTypeSpecSign() == DeclSpec::TSS_unspecified) 717193326Sed Result = Context.CharTy; 718193326Sed else if (DS.getTypeSpecSign() == DeclSpec::TSS_signed) 719193326Sed Result = Context.SignedCharTy; 720193326Sed else { 721193326Sed assert(DS.getTypeSpecSign() == DeclSpec::TSS_unsigned && 722193326Sed "Unknown TSS value"); 723193326Sed Result = Context.UnsignedCharTy; 724193326Sed } 725193326Sed break; 726193326Sed case DeclSpec::TST_wchar: 727193326Sed if (DS.getTypeSpecSign() == DeclSpec::TSS_unspecified) 728193326Sed Result = Context.WCharTy; 729193326Sed else if (DS.getTypeSpecSign() == DeclSpec::TSS_signed) { 730218893Sdim S.Diag(DS.getTypeSpecSignLoc(), diag::ext_invalid_sign_spec) 731193326Sed << DS.getSpecifierName(DS.getTypeSpecType()); 732193326Sed Result = Context.getSignedWCharType(); 733193326Sed } else { 734193326Sed assert(DS.getTypeSpecSign() == DeclSpec::TSS_unsigned && 735193326Sed "Unknown TSS value"); 736218893Sdim S.Diag(DS.getTypeSpecSignLoc(), diag::ext_invalid_sign_spec) 737193326Sed << DS.getSpecifierName(DS.getTypeSpecType()); 738193326Sed Result = Context.getUnsignedWCharType(); 739193326Sed } 740193326Sed break; 741198092Srdivacky case DeclSpec::TST_char16: 742198092Srdivacky assert(DS.getTypeSpecSign() == DeclSpec::TSS_unspecified && 743198092Srdivacky "Unknown TSS value"); 744198092Srdivacky Result = Context.Char16Ty; 745198092Srdivacky break; 746198092Srdivacky case DeclSpec::TST_char32: 747198092Srdivacky assert(DS.getTypeSpecSign() == DeclSpec::TSS_unspecified && 748198092Srdivacky "Unknown TSS value"); 749198092Srdivacky Result = Context.Char32Ty; 750198092Srdivacky break; 751193326Sed case DeclSpec::TST_unspecified: 752193326Sed // "<proto1,proto2>" is an objc qualified ID with a missing id. 753193326Sed if (DeclSpec::ProtocolQualifierListTy PQ = DS.getProtocolQualifiers()) { 754208600Srdivacky Result = Context.getObjCObjectType(Context.ObjCBuiltinIdTy, 755243830Sdim (ObjCProtocolDecl*const*)PQ, 756208600Srdivacky DS.getNumProtocolQualifiers()); 757208600Srdivacky Result = Context.getObjCObjectPointerType(Result); 758193326Sed break; 759193326Sed } 760239462Sdim 761198893Srdivacky // If this is a missing declspec in a block literal return context, then it 762198893Srdivacky // is inferred from the return statements inside the block. 763234353Sdim // The declspec is always missing in a lambda expr context; it is either 764234353Sdim // specified with a trailing return type or inferred. 765263508Sdim if (S.getLangOpts().CPlusPlus1y && 766263508Sdim declarator.getContext() == Declarator::LambdaExprContext) { 767263508Sdim // In C++1y, a lambda's implicit return type is 'auto'. 768263508Sdim Result = Context.getAutoDeductType(); 769263508Sdim break; 770263508Sdim } else if (declarator.getContext() == Declarator::LambdaExprContext || 771263508Sdim isOmittedBlockReturnType(declarator)) { 772198893Srdivacky Result = Context.DependentTy; 773198893Srdivacky break; 774198893Srdivacky } 775198092Srdivacky 776193326Sed // Unspecified typespec defaults to int in C90. However, the C90 grammar 777193326Sed // [C90 6.5] only allows a decl-spec if there was *some* type-specifier, 778193326Sed // type-qualifier, or storage-class-specifier. If not, emit an extwarn. 779193326Sed // Note that the one exception to this is function definitions, which are 780193326Sed // allowed to be completely missing a declspec. This is handled in the 781193326Sed // parser already though by it pretending to have seen an 'int' in this 782193326Sed // case. 783234353Sdim if (S.getLangOpts().ImplicitInt) { 784193326Sed // In C89 mode, we only warn if there is a completely missing declspec 785193326Sed // when one is not allowed. 786193326Sed if (DS.isEmpty()) { 787218893Sdim S.Diag(DeclLoc, diag::ext_missing_declspec) 788193326Sed << DS.getSourceRange() 789234353Sdim << FixItHint::CreateInsertion(DS.getLocStart(), "int"); 790193326Sed } 791193326Sed } else if (!DS.hasTypeSpecifier()) { 792193326Sed // C99 and C++ require a type specifier. For example, C99 6.7.2p2 says: 793193326Sed // "At least one type specifier shall be given in the declaration 794193326Sed // specifiers in each declaration, and in the specifier-qualifier list in 795193326Sed // each struct declaration and type name." 796251662Sdim if (S.getLangOpts().CPlusPlus) { 797218893Sdim S.Diag(DeclLoc, diag::err_missing_type_specifier) 798193326Sed << DS.getSourceRange(); 799198092Srdivacky 800195099Sed // When this occurs in C++ code, often something is very broken with the 801195099Sed // value being declared, poison it as invalid so we don't get chains of 802195099Sed // errors. 803218893Sdim declarator.setInvalidType(true); 804195099Sed } else { 805218893Sdim S.Diag(DeclLoc, diag::ext_missing_type_specifier) 806193326Sed << DS.getSourceRange(); 807195099Sed } 808193326Sed } 809198092Srdivacky 810198092Srdivacky // FALL THROUGH. 811193326Sed case DeclSpec::TST_int: { 812193326Sed if (DS.getTypeSpecSign() != DeclSpec::TSS_unsigned) { 813193326Sed switch (DS.getTypeSpecWidth()) { 814193326Sed case DeclSpec::TSW_unspecified: Result = Context.IntTy; break; 815193326Sed case DeclSpec::TSW_short: Result = Context.ShortTy; break; 816193326Sed case DeclSpec::TSW_long: Result = Context.LongTy; break; 817198893Srdivacky case DeclSpec::TSW_longlong: 818198893Srdivacky Result = Context.LongLongTy; 819239462Sdim 820243830Sdim // 'long long' is a C99 or C++11 feature. 821243830Sdim if (!S.getLangOpts().C99) { 822243830Sdim if (S.getLangOpts().CPlusPlus) 823243830Sdim S.Diag(DS.getTypeSpecWidthLoc(), 824249423Sdim S.getLangOpts().CPlusPlus11 ? 825243830Sdim diag::warn_cxx98_compat_longlong : diag::ext_cxx11_longlong); 826243830Sdim else 827243830Sdim S.Diag(DS.getTypeSpecWidthLoc(), diag::ext_c99_longlong); 828243830Sdim } 829198893Srdivacky break; 830193326Sed } 831193326Sed } else { 832193326Sed switch (DS.getTypeSpecWidth()) { 833193326Sed case DeclSpec::TSW_unspecified: Result = Context.UnsignedIntTy; break; 834193326Sed case DeclSpec::TSW_short: Result = Context.UnsignedShortTy; break; 835193326Sed case DeclSpec::TSW_long: Result = Context.UnsignedLongTy; break; 836198893Srdivacky case DeclSpec::TSW_longlong: 837198893Srdivacky Result = Context.UnsignedLongLongTy; 838239462Sdim 839243830Sdim // 'long long' is a C99 or C++11 feature. 840243830Sdim if (!S.getLangOpts().C99) { 841243830Sdim if (S.getLangOpts().CPlusPlus) 842243830Sdim S.Diag(DS.getTypeSpecWidthLoc(), 843249423Sdim S.getLangOpts().CPlusPlus11 ? 844243830Sdim diag::warn_cxx98_compat_longlong : diag::ext_cxx11_longlong); 845243830Sdim else 846243830Sdim S.Diag(DS.getTypeSpecWidthLoc(), diag::ext_c99_longlong); 847243830Sdim } 848198893Srdivacky break; 849193326Sed } 850193326Sed } 851193326Sed break; 852193326Sed } 853234353Sdim case DeclSpec::TST_int128: 854249423Sdim if (!S.PP.getTargetInfo().hasInt128Type()) 855249423Sdim S.Diag(DS.getTypeSpecTypeLoc(), diag::err_int128_unsupported); 856234353Sdim if (DS.getTypeSpecSign() == DeclSpec::TSS_unsigned) 857234353Sdim Result = Context.UnsignedInt128Ty; 858234353Sdim else 859234353Sdim Result = Context.Int128Ty; 860234353Sdim break; 861226633Sdim case DeclSpec::TST_half: Result = Context.HalfTy; break; 862193326Sed case DeclSpec::TST_float: Result = Context.FloatTy; break; 863193326Sed case DeclSpec::TST_double: 864193326Sed if (DS.getTypeSpecWidth() == DeclSpec::TSW_long) 865193326Sed Result = Context.LongDoubleTy; 866193326Sed else 867193326Sed Result = Context.DoubleTy; 868218893Sdim 869234353Sdim if (S.getLangOpts().OpenCL && !S.getOpenCLOptions().cl_khr_fp64) { 870218893Sdim S.Diag(DS.getTypeSpecTypeLoc(), diag::err_double_requires_fp64); 871218893Sdim declarator.setInvalidType(true); 872218893Sdim } 873193326Sed break; 874193326Sed case DeclSpec::TST_bool: Result = Context.BoolTy; break; // _Bool or bool 875193326Sed case DeclSpec::TST_decimal32: // _Decimal32 876193326Sed case DeclSpec::TST_decimal64: // _Decimal64 877193326Sed case DeclSpec::TST_decimal128: // _Decimal128 878218893Sdim S.Diag(DS.getTypeSpecTypeLoc(), diag::err_decimal_unsupported); 879193326Sed Result = Context.IntTy; 880218893Sdim declarator.setInvalidType(true); 881193326Sed break; 882193326Sed case DeclSpec::TST_class: 883193326Sed case DeclSpec::TST_enum: 884193326Sed case DeclSpec::TST_union: 885243830Sdim case DeclSpec::TST_struct: 886243830Sdim case DeclSpec::TST_interface: { 887212904Sdim TypeDecl *D = dyn_cast_or_null<TypeDecl>(DS.getRepAsDecl()); 888198092Srdivacky if (!D) { 889198092Srdivacky // This can happen in C++ with ambiguous lookups. 890198092Srdivacky Result = Context.IntTy; 891218893Sdim declarator.setInvalidType(true); 892198092Srdivacky break; 893198092Srdivacky } 894198092Srdivacky 895198893Srdivacky // If the type is deprecated or unavailable, diagnose it. 896221345Sdim S.DiagnoseUseOfDecl(D, DS.getTypeSpecTypeNameLoc()); 897239462Sdim 898193326Sed assert(DS.getTypeSpecWidth() == 0 && DS.getTypeSpecComplex() == 0 && 899198893Srdivacky DS.getTypeSpecSign() == 0 && "No qualifiers on tag names!"); 900239462Sdim 901193326Sed // TypeQuals handled by caller. 902198893Srdivacky Result = Context.getTypeDeclType(D); 903198092Srdivacky 904221345Sdim // In both C and C++, make an ElaboratedType. 905221345Sdim ElaboratedTypeKeyword Keyword 906221345Sdim = ElaboratedType::getKeywordForTypeSpec(DS.getTypeSpecType()); 907221345Sdim Result = S.getElaboratedType(Keyword, DS.getTypeSpecScope(), Result); 908193326Sed break; 909198092Srdivacky } 910193326Sed case DeclSpec::TST_typename: { 911193326Sed assert(DS.getTypeSpecWidth() == 0 && DS.getTypeSpecComplex() == 0 && 912193326Sed DS.getTypeSpecSign() == 0 && 913193326Sed "Can't handle qualifiers on typedef names yet!"); 914218893Sdim Result = S.GetTypeFromParser(DS.getRepAsType()); 915212904Sdim if (Result.isNull()) 916218893Sdim declarator.setInvalidType(true); 917212904Sdim else if (DeclSpec::ProtocolQualifierListTy PQ 918212904Sdim = DS.getProtocolQualifiers()) { 919208600Srdivacky if (const ObjCObjectType *ObjT = Result->getAs<ObjCObjectType>()) { 920208600Srdivacky // Silently drop any existing protocol qualifiers. 921208600Srdivacky // TODO: determine whether that's the right thing to do. 922208600Srdivacky if (ObjT->getNumProtocols()) 923208600Srdivacky Result = ObjT->getBaseType(); 924208600Srdivacky 925208600Srdivacky if (DS.getNumProtocolQualifiers()) 926208600Srdivacky Result = Context.getObjCObjectType(Result, 927243830Sdim (ObjCProtocolDecl*const*) PQ, 928208600Srdivacky DS.getNumProtocolQualifiers()); 929208600Srdivacky } else if (Result->isObjCIdType()) { 930193326Sed // id<protocol-list> 931208600Srdivacky Result = Context.getObjCObjectType(Context.ObjCBuiltinIdTy, 932243830Sdim (ObjCProtocolDecl*const*) PQ, 933208600Srdivacky DS.getNumProtocolQualifiers()); 934208600Srdivacky Result = Context.getObjCObjectPointerType(Result); 935208600Srdivacky } else if (Result->isObjCClassType()) { 936193326Sed // Class<protocol-list> 937208600Srdivacky Result = Context.getObjCObjectType(Context.ObjCBuiltinClassTy, 938243830Sdim (ObjCProtocolDecl*const*) PQ, 939208600Srdivacky DS.getNumProtocolQualifiers()); 940208600Srdivacky Result = Context.getObjCObjectPointerType(Result); 941193326Sed } else { 942218893Sdim S.Diag(DeclLoc, diag::err_invalid_protocol_qualifiers) 943193326Sed << DS.getSourceRange(); 944218893Sdim declarator.setInvalidType(true); 945193326Sed } 946193326Sed } 947198092Srdivacky 948193326Sed // TypeQuals handled by caller. 949193326Sed break; 950193326Sed } 951193326Sed case DeclSpec::TST_typeofType: 952198092Srdivacky // FIXME: Preserve type source info. 953218893Sdim Result = S.GetTypeFromParser(DS.getRepAsType()); 954193326Sed assert(!Result.isNull() && "Didn't get a type for typeof?"); 955218893Sdim if (!Result->isDependentType()) 956218893Sdim if (const TagType *TT = Result->getAs<TagType>()) 957218893Sdim S.DiagnoseUseOfDecl(TT->getDecl(), DS.getTypeSpecTypeLoc()); 958193326Sed // TypeQuals handled by caller. 959193326Sed Result = Context.getTypeOfType(Result); 960193326Sed break; 961193326Sed case DeclSpec::TST_typeofExpr: { 962212904Sdim Expr *E = DS.getRepAsExpr(); 963193326Sed assert(E && "Didn't get an expression for typeof?"); 964193326Sed // TypeQuals handled by caller. 965218893Sdim Result = S.BuildTypeofExprType(E, DS.getTypeSpecTypeLoc()); 966201361Srdivacky if (Result.isNull()) { 967201361Srdivacky Result = Context.IntTy; 968218893Sdim declarator.setInvalidType(true); 969201361Srdivacky } 970193326Sed break; 971193326Sed } 972195099Sed case DeclSpec::TST_decltype: { 973212904Sdim Expr *E = DS.getRepAsExpr(); 974195099Sed assert(E && "Didn't get an expression for decltype?"); 975195099Sed // TypeQuals handled by caller. 976218893Sdim Result = S.BuildDecltypeType(E, DS.getTypeSpecTypeLoc()); 977195341Sed if (Result.isNull()) { 978195341Sed Result = Context.IntTy; 979218893Sdim declarator.setInvalidType(true); 980195341Sed } 981195099Sed break; 982195099Sed } 983223017Sdim case DeclSpec::TST_underlyingType: 984223017Sdim Result = S.GetTypeFromParser(DS.getRepAsType()); 985223017Sdim assert(!Result.isNull() && "Didn't get a type for __underlying_type?"); 986223017Sdim Result = S.BuildUnaryTransformType(Result, 987223017Sdim UnaryTransformType::EnumUnderlyingType, 988223017Sdim DS.getTypeSpecTypeLoc()); 989223017Sdim if (Result.isNull()) { 990223017Sdim Result = Context.IntTy; 991223017Sdim declarator.setInvalidType(true); 992223017Sdim } 993239462Sdim break; 994223017Sdim 995251662Sdim case DeclSpec::TST_auto: 996195099Sed // TypeQuals handled by caller. 997263508Sdim // If auto is mentioned in a lambda parameter context, convert it to a 998263508Sdim // template parameter type immediately, with the appropriate depth and 999263508Sdim // index, and update sema's state (LambdaScopeInfo) for the current lambda 1000263508Sdim // being analyzed (which tracks the invented type template parameter). 1001263508Sdim if (declarator.getContext() == Declarator::LambdaExprParameterContext) { 1002263508Sdim sema::LambdaScopeInfo *LSI = S.getCurLambda(); 1003263508Sdim assert(LSI && "No LambdaScopeInfo on the stack!"); 1004263508Sdim const unsigned TemplateParameterDepth = LSI->AutoTemplateParameterDepth; 1005263508Sdim const unsigned AutoParameterPosition = LSI->AutoTemplateParams.size(); 1006263508Sdim const bool IsParameterPack = declarator.hasEllipsis(); 1007263508Sdim 1008263508Sdim // Create a name for the invented template parameter type. 1009263508Sdim std::string InventedTemplateParamName = "$auto-"; 1010263508Sdim llvm::raw_string_ostream ss(InventedTemplateParamName); 1011263508Sdim ss << TemplateParameterDepth; 1012263508Sdim ss << "-" << AutoParameterPosition; 1013263508Sdim ss.flush(); 1014263508Sdim 1015263508Sdim IdentifierInfo& TemplateParamII = Context.Idents.get( 1016263508Sdim InventedTemplateParamName.c_str()); 1017263508Sdim // Turns out we must create the TemplateTypeParmDecl here to 1018263508Sdim // retrieve the corresponding template parameter type. 1019263508Sdim TemplateTypeParmDecl *CorrespondingTemplateParam = 1020263508Sdim TemplateTypeParmDecl::Create(Context, 1021263508Sdim // Temporarily add to the TranslationUnit DeclContext. When the 1022263508Sdim // associated TemplateParameterList is attached to a template 1023263508Sdim // declaration (such as FunctionTemplateDecl), the DeclContext 1024263508Sdim // for each template parameter gets updated appropriately via 1025263508Sdim // a call to AdoptTemplateParameterList. 1026263508Sdim Context.getTranslationUnitDecl(), 1027263508Sdim /*KeyLoc*/ SourceLocation(), 1028263508Sdim /*NameLoc*/ declarator.getLocStart(), 1029263508Sdim TemplateParameterDepth, 1030263508Sdim AutoParameterPosition, // our template param index 1031263508Sdim /* Identifier*/ &TemplateParamII, false, IsParameterPack); 1032263508Sdim LSI->AutoTemplateParams.push_back(CorrespondingTemplateParam); 1033263508Sdim // Replace the 'auto' in the function parameter with this invented 1034263508Sdim // template type parameter. 1035263508Sdim Result = QualType(CorrespondingTemplateParam->getTypeForDecl(), 0); 1036263508Sdim } else { 1037263508Sdim Result = Context.getAutoType(QualType(), /*decltype(auto)*/false, false); 1038263508Sdim } 1039195099Sed break; 1040198092Srdivacky 1041251662Sdim case DeclSpec::TST_decltype_auto: 1042263508Sdim Result = Context.getAutoType(QualType(), 1043263508Sdim /*decltype(auto)*/true, 1044263508Sdim /*IsDependent*/ false); 1045251662Sdim break; 1046251662Sdim 1047221345Sdim case DeclSpec::TST_unknown_anytype: 1048221345Sdim Result = Context.UnknownAnyTy; 1049221345Sdim break; 1050221345Sdim 1051226633Sdim case DeclSpec::TST_atomic: 1052226633Sdim Result = S.GetTypeFromParser(DS.getRepAsType()); 1053226633Sdim assert(!Result.isNull() && "Didn't get a type for _Atomic?"); 1054226633Sdim Result = S.BuildAtomicType(Result, DS.getTypeSpecTypeLoc()); 1055226633Sdim if (Result.isNull()) { 1056226633Sdim Result = Context.IntTy; 1057226633Sdim declarator.setInvalidType(true); 1058226633Sdim } 1059239462Sdim break; 1060226633Sdim 1061249423Sdim case DeclSpec::TST_image1d_t: 1062249423Sdim Result = Context.OCLImage1dTy; 1063249423Sdim break; 1064249423Sdim 1065249423Sdim case DeclSpec::TST_image1d_array_t: 1066249423Sdim Result = Context.OCLImage1dArrayTy; 1067249423Sdim break; 1068249423Sdim 1069249423Sdim case DeclSpec::TST_image1d_buffer_t: 1070249423Sdim Result = Context.OCLImage1dBufferTy; 1071249423Sdim break; 1072249423Sdim 1073249423Sdim case DeclSpec::TST_image2d_t: 1074249423Sdim Result = Context.OCLImage2dTy; 1075249423Sdim break; 1076249423Sdim 1077249423Sdim case DeclSpec::TST_image2d_array_t: 1078249423Sdim Result = Context.OCLImage2dArrayTy; 1079249423Sdim break; 1080249423Sdim 1081249423Sdim case DeclSpec::TST_image3d_t: 1082249423Sdim Result = Context.OCLImage3dTy; 1083249423Sdim break; 1084249423Sdim 1085249423Sdim case DeclSpec::TST_sampler_t: 1086249423Sdim Result = Context.OCLSamplerTy; 1087249423Sdim break; 1088249423Sdim 1089249423Sdim case DeclSpec::TST_event_t: 1090249423Sdim Result = Context.OCLEventTy; 1091249423Sdim break; 1092249423Sdim 1093193326Sed case DeclSpec::TST_error: 1094193326Sed Result = Context.IntTy; 1095218893Sdim declarator.setInvalidType(true); 1096193326Sed break; 1097193326Sed } 1098198092Srdivacky 1099193326Sed // Handle complex types. 1100193326Sed if (DS.getTypeSpecComplex() == DeclSpec::TSC_complex) { 1101234353Sdim if (S.getLangOpts().Freestanding) 1102218893Sdim S.Diag(DS.getTypeSpecComplexLoc(), diag::ext_freestanding_complex); 1103193326Sed Result = Context.getComplexType(Result); 1104203955Srdivacky } else if (DS.isTypeAltiVecVector()) { 1105203955Srdivacky unsigned typeSize = static_cast<unsigned>(Context.getTypeSize(Result)); 1106203955Srdivacky assert(typeSize > 0 && "type size for vector must be greater than 0 bits"); 1107218893Sdim VectorType::VectorKind VecKind = VectorType::AltiVecVector; 1108210299Sed if (DS.isTypeAltiVecPixel()) 1109218893Sdim VecKind = VectorType::AltiVecPixel; 1110210299Sed else if (DS.isTypeAltiVecBool()) 1111218893Sdim VecKind = VectorType::AltiVecBool; 1112218893Sdim Result = Context.getVectorType(Result, 128/typeSize, VecKind); 1113193326Sed } 1114198092Srdivacky 1115218893Sdim // FIXME: Imaginary. 1116218893Sdim if (DS.getTypeSpecComplex() == DeclSpec::TSC_imaginary) 1117218893Sdim S.Diag(DS.getTypeSpecComplexLoc(), diag::err_imaginary_not_supported); 1118198092Srdivacky 1119218893Sdim // Before we process any type attributes, synthesize a block literal 1120218893Sdim // function declarator if necessary. 1121218893Sdim if (declarator.getContext() == Declarator::BlockLiteralContext) 1122218893Sdim maybeSynthesizeBlockSignature(state, Result); 1123198092Srdivacky 1124218893Sdim // Apply any type attributes from the decl spec. This may cause the 1125218893Sdim // list of type attributes to be temporarily saved while the type 1126218893Sdim // attributes are pushed around. 1127218893Sdim if (AttributeList *attrs = DS.getAttributes().getList()) 1128249423Sdim processTypeAttrs(state, Result, TAL_DeclSpec, attrs); 1129218893Sdim 1130193326Sed // Apply const/volatile/restrict qualifiers to T. 1131193326Sed if (unsigned TypeQuals = DS.getTypeQualifiers()) { 1132193326Sed 1133193326Sed // Warn about CV qualifiers on functions: C99 6.7.3p8: "If the specification 1134193326Sed // of a function type includes any type qualifiers, the behavior is 1135193326Sed // undefined." 1136193326Sed if (Result->isFunctionType() && TypeQuals) { 1137198092Srdivacky if (TypeQuals & DeclSpec::TQ_const) 1138249423Sdim S.Diag(DS.getConstSpecLoc(), diag::warn_typecheck_function_qualifiers) 1139249423Sdim << Result << DS.getSourceRange(); 1140198092Srdivacky else if (TypeQuals & DeclSpec::TQ_volatile) 1141249423Sdim S.Diag(DS.getVolatileSpecLoc(), diag::warn_typecheck_function_qualifiers) 1142249423Sdim << Result << DS.getSourceRange(); 1143193326Sed else { 1144249423Sdim assert((TypeQuals & (DeclSpec::TQ_restrict | DeclSpec::TQ_atomic)) && 1145249423Sdim "Has CVRA quals but not C, V, R, or A?"); 1146249423Sdim // No diagnostic; we'll diagnose 'restrict' or '_Atomic' applied to a 1147249423Sdim // function type later, in BuildQualifiedType. 1148193326Sed } 1149193326Sed } 1150198092Srdivacky 1151193326Sed // C++ [dcl.ref]p1: 1152193326Sed // Cv-qualified references are ill-formed except when the 1153193326Sed // cv-qualifiers are introduced through the use of a typedef 1154193326Sed // (7.1.3) or of a template type argument (14.3), in which 1155193326Sed // case the cv-qualifiers are ignored. 1156193326Sed // FIXME: Shouldn't we be checking SCS_typedef here? 1157193326Sed if (DS.getTypeSpecType() == DeclSpec::TST_typename && 1158193326Sed TypeQuals && Result->isReferenceType()) { 1159198092Srdivacky TypeQuals &= ~DeclSpec::TQ_const; 1160198092Srdivacky TypeQuals &= ~DeclSpec::TQ_volatile; 1161249423Sdim TypeQuals &= ~DeclSpec::TQ_atomic; 1162198092Srdivacky } 1163198092Srdivacky 1164234353Sdim // C90 6.5.3 constraints: "The same type qualifier shall not appear more 1165234353Sdim // than once in the same specifier-list or qualifier-list, either directly 1166234353Sdim // or via one or more typedefs." 1167239462Sdim if (!S.getLangOpts().C99 && !S.getLangOpts().CPlusPlus 1168234353Sdim && TypeQuals & Result.getCVRQualifiers()) { 1169234353Sdim if (TypeQuals & DeclSpec::TQ_const && Result.isConstQualified()) { 1170239462Sdim S.Diag(DS.getConstSpecLoc(), diag::ext_duplicate_declspec) 1171234353Sdim << "const"; 1172234353Sdim } 1173234353Sdim 1174234353Sdim if (TypeQuals & DeclSpec::TQ_volatile && Result.isVolatileQualified()) { 1175239462Sdim S.Diag(DS.getVolatileSpecLoc(), diag::ext_duplicate_declspec) 1176234353Sdim << "volatile"; 1177234353Sdim } 1178234353Sdim 1179249423Sdim // C90 doesn't have restrict nor _Atomic, so it doesn't force us to 1180249423Sdim // produce a warning in this case. 1181234353Sdim } 1182234353Sdim 1183249423Sdim QualType Qualified = S.BuildQualifiedType(Result, DeclLoc, TypeQuals, &DS); 1184249423Sdim 1185249423Sdim // If adding qualifiers fails, just use the unqualified type. 1186249423Sdim if (Qualified.isNull()) 1187249423Sdim declarator.setInvalidType(true); 1188249423Sdim else 1189249423Sdim Result = Qualified; 1190193326Sed } 1191198092Srdivacky 1192193326Sed return Result; 1193193326Sed} 1194193326Sed 1195193326Sedstatic std::string getPrintableNameForEntity(DeclarationName Entity) { 1196193326Sed if (Entity) 1197193326Sed return Entity.getAsString(); 1198198092Srdivacky 1199193326Sed return "type name"; 1200193326Sed} 1201193326Sed 1202210299SedQualType Sema::BuildQualifiedType(QualType T, SourceLocation Loc, 1203249423Sdim Qualifiers Qs, const DeclSpec *DS) { 1204210299Sed // Enforce C99 6.7.3p2: "Types other than pointer types derived from 1205210299Sed // object or incomplete types shall not be restrict-qualified." 1206210299Sed if (Qs.hasRestrict()) { 1207210299Sed unsigned DiagID = 0; 1208210299Sed QualType ProblemTy; 1209210299Sed 1210249423Sdim if (T->isAnyPointerType() || T->isReferenceType() || 1211249423Sdim T->isMemberPointerType()) { 1212249423Sdim QualType EltTy; 1213249423Sdim if (T->isObjCObjectPointerType()) 1214249423Sdim EltTy = T; 1215249423Sdim else if (const MemberPointerType *PTy = T->getAs<MemberPointerType>()) 1216249423Sdim EltTy = PTy->getPointeeType(); 1217249423Sdim else 1218249423Sdim EltTy = T->getPointeeType(); 1219249423Sdim 1220249423Sdim // If we have a pointer or reference, the pointee must have an object 1221249423Sdim // incomplete type. 1222249423Sdim if (!EltTy->isIncompleteOrObjectType()) { 1223210299Sed DiagID = diag::err_typecheck_invalid_restrict_invalid_pointee; 1224249423Sdim ProblemTy = EltTy; 1225210299Sed } 1226249423Sdim } else if (!T->isDependentType()) { 1227249423Sdim DiagID = diag::err_typecheck_invalid_restrict_not_pointer; 1228210299Sed ProblemTy = T; 1229210299Sed } 1230210299Sed 1231210299Sed if (DiagID) { 1232249423Sdim Diag(DS ? DS->getRestrictSpecLoc() : Loc, DiagID) << ProblemTy; 1233210299Sed Qs.removeRestrict(); 1234210299Sed } 1235210299Sed } 1236210299Sed 1237210299Sed return Context.getQualifiedType(T, Qs); 1238210299Sed} 1239210299Sed 1240249423SdimQualType Sema::BuildQualifiedType(QualType T, SourceLocation Loc, 1241249423Sdim unsigned CVRA, const DeclSpec *DS) { 1242249423Sdim // Convert from DeclSpec::TQ to Qualifiers::TQ by just dropping TQ_atomic. 1243249423Sdim unsigned CVR = CVRA & ~DeclSpec::TQ_atomic; 1244249423Sdim 1245249423Sdim // C11 6.7.3/5: 1246249423Sdim // If the same qualifier appears more than once in the same 1247249423Sdim // specifier-qualifier-list, either directly or via one or more typedefs, 1248249423Sdim // the behavior is the same as if it appeared only once. 1249249423Sdim // 1250249423Sdim // It's not specified what happens when the _Atomic qualifier is applied to 1251249423Sdim // a type specified with the _Atomic specifier, but we assume that this 1252249423Sdim // should be treated as if the _Atomic qualifier appeared multiple times. 1253249423Sdim if (CVRA & DeclSpec::TQ_atomic && !T->isAtomicType()) { 1254249423Sdim // C11 6.7.3/5: 1255249423Sdim // If other qualifiers appear along with the _Atomic qualifier in a 1256249423Sdim // specifier-qualifier-list, the resulting type is the so-qualified 1257249423Sdim // atomic type. 1258249423Sdim // 1259249423Sdim // Don't need to worry about array types here, since _Atomic can't be 1260249423Sdim // applied to such types. 1261249423Sdim SplitQualType Split = T.getSplitUnqualifiedType(); 1262249423Sdim T = BuildAtomicType(QualType(Split.Ty, 0), 1263249423Sdim DS ? DS->getAtomicSpecLoc() : Loc); 1264249423Sdim if (T.isNull()) 1265249423Sdim return T; 1266249423Sdim Split.Quals.addCVRQualifiers(CVR); 1267249423Sdim return BuildQualifiedType(T, Loc, Split.Quals); 1268249423Sdim } 1269249423Sdim 1270249423Sdim return BuildQualifiedType(T, Loc, Qualifiers::fromCVRMask(CVR), DS); 1271249423Sdim} 1272249423Sdim 1273218893Sdim/// \brief Build a paren type including \p T. 1274218893SdimQualType Sema::BuildParenType(QualType T) { 1275218893Sdim return Context.getParenType(T); 1276218893Sdim} 1277218893Sdim 1278224145Sdim/// Given that we're building a pointer or reference to the given 1279224145Sdimstatic QualType inferARCLifetimeForPointee(Sema &S, QualType type, 1280224145Sdim SourceLocation loc, 1281224145Sdim bool isReference) { 1282224145Sdim // Bail out if retention is unrequired or already specified. 1283224145Sdim if (!type->isObjCLifetimeType() || 1284224145Sdim type.getObjCLifetime() != Qualifiers::OCL_None) 1285224145Sdim return type; 1286224145Sdim 1287224145Sdim Qualifiers::ObjCLifetime implicitLifetime = Qualifiers::OCL_None; 1288224145Sdim 1289224145Sdim // If the object type is const-qualified, we can safely use 1290224145Sdim // __unsafe_unretained. This is safe (because there are no read 1291224145Sdim // barriers), and it'll be safe to coerce anything but __weak* to 1292224145Sdim // the resulting type. 1293224145Sdim if (type.isConstQualified()) { 1294224145Sdim implicitLifetime = Qualifiers::OCL_ExplicitNone; 1295224145Sdim 1296224145Sdim // Otherwise, check whether the static type does not require 1297224145Sdim // retaining. This currently only triggers for Class (possibly 1298224145Sdim // protocol-qualifed, and arrays thereof). 1299224145Sdim } else if (type->isObjCARCImplicitlyUnretainedType()) { 1300224145Sdim implicitLifetime = Qualifiers::OCL_ExplicitNone; 1301224145Sdim 1302234353Sdim // If we are in an unevaluated context, like sizeof, skip adding a 1303234353Sdim // qualification. 1304239462Sdim } else if (S.isUnevaluatedContext()) { 1305234353Sdim return type; 1306226633Sdim 1307234353Sdim // If that failed, give an error and recover using __strong. __strong 1308234353Sdim // is the option most likely to prevent spurious second-order diagnostics, 1309234353Sdim // like when binding a reference to a field. 1310224145Sdim } else { 1311224145Sdim // These types can show up in private ivars in system headers, so 1312224145Sdim // we need this to not be an error in those cases. Instead we 1313224145Sdim // want to delay. 1314224145Sdim if (S.DelayedDiagnostics.shouldDelayDiagnostics()) { 1315224145Sdim S.DelayedDiagnostics.add( 1316224145Sdim sema::DelayedDiagnostic::makeForbiddenType(loc, 1317224145Sdim diag::err_arc_indirect_no_ownership, type, isReference)); 1318224145Sdim } else { 1319224145Sdim S.Diag(loc, diag::err_arc_indirect_no_ownership) << type << isReference; 1320224145Sdim } 1321234353Sdim implicitLifetime = Qualifiers::OCL_Strong; 1322224145Sdim } 1323224145Sdim assert(implicitLifetime && "didn't infer any lifetime!"); 1324224145Sdim 1325224145Sdim Qualifiers qs; 1326224145Sdim qs.addObjCLifetime(implicitLifetime); 1327224145Sdim return S.Context.getQualifiedType(type, qs); 1328224145Sdim} 1329224145Sdim 1330193326Sed/// \brief Build a pointer type. 1331193326Sed/// 1332193326Sed/// \param T The type to which we'll be building a pointer. 1333193326Sed/// 1334193326Sed/// \param Loc The location of the entity whose type involves this 1335193326Sed/// pointer type or, if there is no such entity, the location of the 1336193326Sed/// type that will have pointer type. 1337193326Sed/// 1338193326Sed/// \param Entity The name of the entity that involves the pointer 1339193326Sed/// type, if known. 1340193326Sed/// 1341193326Sed/// \returns A suitable pointer type, if there are no 1342193326Sed/// errors. Otherwise, returns a NULL type. 1343210299SedQualType Sema::BuildPointerType(QualType T, 1344193326Sed SourceLocation Loc, DeclarationName Entity) { 1345193326Sed if (T->isReferenceType()) { 1346193326Sed // C++ 8.3.2p4: There shall be no ... pointers to references ... 1347193326Sed Diag(Loc, diag::err_illegal_decl_pointer_to_reference) 1348198893Srdivacky << getPrintableNameForEntity(Entity) << T; 1349193326Sed return QualType(); 1350193326Sed } 1351193326Sed 1352208600Srdivacky assert(!T->isObjCObjectType() && "Should build ObjCObjectPointerType"); 1353207619Srdivacky 1354224145Sdim // In ARC, it is forbidden to build pointers to unqualified pointers. 1355234353Sdim if (getLangOpts().ObjCAutoRefCount) 1356224145Sdim T = inferARCLifetimeForPointee(*this, T, Loc, /*reference*/ false); 1357224145Sdim 1358193326Sed // Build the pointer type. 1359210299Sed return Context.getPointerType(T); 1360193326Sed} 1361193326Sed 1362193326Sed/// \brief Build a reference type. 1363193326Sed/// 1364193326Sed/// \param T The type to which we'll be building a reference. 1365193326Sed/// 1366193326Sed/// \param Loc The location of the entity whose type involves this 1367193326Sed/// reference type or, if there is no such entity, the location of the 1368193326Sed/// type that will have reference type. 1369193326Sed/// 1370193326Sed/// \param Entity The name of the entity that involves the reference 1371193326Sed/// type, if known. 1372193326Sed/// 1373193326Sed/// \returns A suitable reference type, if there are no 1374193326Sed/// errors. Otherwise, returns a NULL type. 1375198398SrdivackyQualType Sema::BuildReferenceType(QualType T, bool SpelledAsLValue, 1376210299Sed SourceLocation Loc, 1377198398Srdivacky DeclarationName Entity) { 1378239462Sdim assert(Context.getCanonicalType(T) != Context.OverloadTy && 1379223017Sdim "Unresolved overloaded function type"); 1380239462Sdim 1381218893Sdim // C++0x [dcl.ref]p6: 1382239462Sdim // If a typedef (7.1.3), a type template-parameter (14.3.1), or a 1383239462Sdim // decltype-specifier (7.1.6.2) denotes a type TR that is a reference to a 1384239462Sdim // type T, an attempt to create the type "lvalue reference to cv TR" creates 1385239462Sdim // the type "lvalue reference to T", while an attempt to create the type 1386218893Sdim // "rvalue reference to cv TR" creates the type TR. 1387198398Srdivacky bool LValueRef = SpelledAsLValue || T->getAs<LValueReferenceType>(); 1388198398Srdivacky 1389198398Srdivacky // C++ [dcl.ref]p4: There shall be no references to references. 1390198398Srdivacky // 1391198398Srdivacky // According to C++ DR 106, references to references are only 1392198398Srdivacky // diagnosed when they are written directly (e.g., "int & &"), 1393198398Srdivacky // but not when they happen via a typedef: 1394198398Srdivacky // 1395198398Srdivacky // typedef int& intref; 1396198398Srdivacky // typedef intref& intref2; 1397198398Srdivacky // 1398198398Srdivacky // Parser::ParseDeclaratorInternal diagnoses the case where 1399198398Srdivacky // references are written directly; here, we handle the 1400218893Sdim // collapsing of references-to-references as described in C++0x. 1401218893Sdim // DR 106 and 540 introduce reference-collapsing into C++98/03. 1402198398Srdivacky 1403193326Sed // C++ [dcl.ref]p1: 1404198092Srdivacky // A declarator that specifies the type "reference to cv void" 1405193326Sed // is ill-formed. 1406193326Sed if (T->isVoidType()) { 1407193326Sed Diag(Loc, diag::err_reference_to_void); 1408193326Sed return QualType(); 1409193326Sed } 1410193326Sed 1411224145Sdim // In ARC, it is forbidden to build references to unqualified pointers. 1412234353Sdim if (getLangOpts().ObjCAutoRefCount) 1413224145Sdim T = inferARCLifetimeForPointee(*this, T, Loc, /*reference*/ true); 1414224145Sdim 1415193326Sed // Handle restrict on references. 1416193326Sed if (LValueRef) 1417210299Sed return Context.getLValueReferenceType(T, SpelledAsLValue); 1418210299Sed return Context.getRValueReferenceType(T); 1419193326Sed} 1420193326Sed 1421224145Sdim/// Check whether the specified array size makes the array type a VLA. If so, 1422224145Sdim/// return true, if not, return the size of the array in SizeVal. 1423234353Sdimstatic bool isArraySizeVLA(Sema &S, Expr *ArraySize, llvm::APSInt &SizeVal) { 1424234353Sdim // If the size is an ICE, it certainly isn't a VLA. If we're in a GNU mode 1425234353Sdim // (like gnu99, but not c99) accept any evaluatable value as an extension. 1426239462Sdim class VLADiagnoser : public Sema::VerifyICEDiagnoser { 1427239462Sdim public: 1428239462Sdim VLADiagnoser() : Sema::VerifyICEDiagnoser(true) {} 1429239462Sdim 1430239462Sdim virtual void diagnoseNotICE(Sema &S, SourceLocation Loc, SourceRange SR) { 1431239462Sdim } 1432239462Sdim 1433239462Sdim virtual void diagnoseFold(Sema &S, SourceLocation Loc, SourceRange SR) { 1434239462Sdim S.Diag(Loc, diag::ext_vla_folded_to_constant) << SR; 1435239462Sdim } 1436239462Sdim } Diagnoser; 1437239462Sdim 1438239462Sdim return S.VerifyIntegerConstantExpression(ArraySize, &SizeVal, Diagnoser, 1439239462Sdim S.LangOpts.GNUMode).isInvalid(); 1440224145Sdim} 1441224145Sdim 1442224145Sdim 1443193326Sed/// \brief Build an array type. 1444193326Sed/// 1445193326Sed/// \param T The type of each element in the array. 1446193326Sed/// 1447193326Sed/// \param ASM C99 array size modifier (e.g., '*', 'static'). 1448193326Sed/// 1449198092Srdivacky/// \param ArraySize Expression describing the size of the array. 1450198092Srdivacky/// 1451239462Sdim/// \param Brackets The range from the opening '[' to the closing ']'. 1452193326Sed/// 1453193326Sed/// \param Entity The name of the entity that involves the array 1454193326Sed/// type, if known. 1455193326Sed/// 1456193326Sed/// \returns A suitable array type, if there are no errors. Otherwise, 1457193326Sed/// returns a NULL type. 1458193326SedQualType Sema::BuildArrayType(QualType T, ArrayType::ArraySizeModifier ASM, 1459193326Sed Expr *ArraySize, unsigned Quals, 1460198092Srdivacky SourceRange Brackets, DeclarationName Entity) { 1461198092Srdivacky 1462198092Srdivacky SourceLocation Loc = Brackets.getBegin(); 1463234353Sdim if (getLangOpts().CPlusPlus) { 1464207619Srdivacky // C++ [dcl.array]p1: 1465207619Srdivacky // T is called the array element type; this type shall not be a reference 1466239462Sdim // type, the (possibly cv-qualified) type void, a function type or an 1467207619Srdivacky // abstract class type. 1468207619Srdivacky // 1469239462Sdim // C++ [dcl.array]p3: 1470239462Sdim // When several "array of" specifications are adjacent, [...] only the 1471239462Sdim // first of the constant expressions that specify the bounds of the arrays 1472239462Sdim // may be omitted. 1473239462Sdim // 1474207619Srdivacky // Note: function types are handled in the common path with C. 1475207619Srdivacky if (T->isReferenceType()) { 1476207619Srdivacky Diag(Loc, diag::err_illegal_decl_array_of_references) 1477207619Srdivacky << getPrintableNameForEntity(Entity) << T; 1478207619Srdivacky return QualType(); 1479207619Srdivacky } 1480239462Sdim 1481239462Sdim if (T->isVoidType() || T->isIncompleteArrayType()) { 1482198954Srdivacky Diag(Loc, diag::err_illegal_decl_array_incomplete_type) << T; 1483198954Srdivacky return QualType(); 1484198954Srdivacky } 1485239462Sdim 1486239462Sdim if (RequireNonAbstractType(Brackets.getBegin(), T, 1487207619Srdivacky diag::err_array_of_abstract_type)) 1488207619Srdivacky return QualType(); 1489239462Sdim 1490198954Srdivacky } else { 1491207619Srdivacky // C99 6.7.5.2p1: If the element type is an incomplete or function type, 1492207619Srdivacky // reject it (e.g. void ary[7], struct foo ary[7], void ary[7]()) 1493198954Srdivacky if (RequireCompleteType(Loc, T, 1494198954Srdivacky diag::err_illegal_decl_array_incomplete_type)) 1495198954Srdivacky return QualType(); 1496198954Srdivacky } 1497193326Sed 1498193326Sed if (T->isFunctionType()) { 1499193326Sed Diag(Loc, diag::err_illegal_decl_array_of_functions) 1500198893Srdivacky << getPrintableNameForEntity(Entity) << T; 1501193326Sed return QualType(); 1502193326Sed } 1503198092Srdivacky 1504198092Srdivacky if (const RecordType *EltTy = T->getAs<RecordType>()) { 1505193326Sed // If the element type is a struct or union that contains a variadic 1506193326Sed // array, accept it as a GNU extension: C99 6.7.2.1p2. 1507193326Sed if (EltTy->getDecl()->hasFlexibleArrayMember()) 1508193326Sed Diag(Loc, diag::ext_flexible_array_in_array) << T; 1509208600Srdivacky } else if (T->isObjCObjectType()) { 1510193326Sed Diag(Loc, diag::err_objc_array_of_interfaces) << T; 1511193326Sed return QualType(); 1512193326Sed } 1513198092Srdivacky 1514234353Sdim // Do placeholder conversions on the array size expression. 1515234353Sdim if (ArraySize && ArraySize->hasPlaceholderType()) { 1516234353Sdim ExprResult Result = CheckPlaceholderExpr(ArraySize); 1517234353Sdim if (Result.isInvalid()) return QualType(); 1518234353Sdim ArraySize = Result.take(); 1519234353Sdim } 1520234353Sdim 1521218893Sdim // Do lvalue-to-rvalue conversions on the array size expression. 1522221345Sdim if (ArraySize && !ArraySize->isRValue()) { 1523221345Sdim ExprResult Result = DefaultLvalueConversion(ArraySize); 1524221345Sdim if (Result.isInvalid()) 1525221345Sdim return QualType(); 1526218893Sdim 1527221345Sdim ArraySize = Result.take(); 1528221345Sdim } 1529221345Sdim 1530193326Sed // C99 6.7.5.2p1: The size expression shall have integer type. 1531234353Sdim // C++11 allows contextual conversions to such types. 1532249423Sdim if (!getLangOpts().CPlusPlus11 && 1533234353Sdim ArraySize && !ArraySize->isTypeDependent() && 1534218893Sdim !ArraySize->getType()->isIntegralOrUnscopedEnumerationType()) { 1535193326Sed Diag(ArraySize->getLocStart(), diag::err_array_size_non_int) 1536193326Sed << ArraySize->getType() << ArraySize->getSourceRange(); 1537193326Sed return QualType(); 1538193326Sed } 1539234353Sdim 1540212904Sdim llvm::APSInt ConstVal(Context.getTypeSize(Context.getSizeType())); 1541193326Sed if (!ArraySize) { 1542193326Sed if (ASM == ArrayType::Star) 1543198092Srdivacky T = Context.getVariableArrayType(T, 0, ASM, Quals, Brackets); 1544193326Sed else 1545193326Sed T = Context.getIncompleteArrayType(T, ASM, Quals); 1546208600Srdivacky } else if (ArraySize->isTypeDependent() || ArraySize->isValueDependent()) { 1547198092Srdivacky T = Context.getDependentSizedArrayType(T, ArraySize, ASM, Quals, Brackets); 1548234353Sdim } else if ((!T->isDependentType() && !T->isIncompleteType() && 1549234353Sdim !T->isConstantSizeType()) || 1550234353Sdim isArraySizeVLA(*this, ArraySize, ConstVal)) { 1551234353Sdim // Even in C++11, don't allow contextual conversions in the array bound 1552234353Sdim // of a VLA. 1553249423Sdim if (getLangOpts().CPlusPlus11 && 1554234353Sdim !ArraySize->getType()->isIntegralOrUnscopedEnumerationType()) { 1555234353Sdim Diag(ArraySize->getLocStart(), diag::err_array_size_non_int) 1556234353Sdim << ArraySize->getType() << ArraySize->getSourceRange(); 1557234353Sdim return QualType(); 1558234353Sdim } 1559234353Sdim 1560224145Sdim // C99: an array with an element type that has a non-constant-size is a VLA. 1561224145Sdim // C99: an array with a non-ICE size is a VLA. We accept any expression 1562224145Sdim // that we can fold to a non-zero positive value as an extension. 1563224145Sdim T = Context.getVariableArrayType(T, ArraySize, ASM, Quals, Brackets); 1564193326Sed } else { 1565193326Sed // C99 6.7.5.2p1: If the expression is a constant expression, it shall 1566193326Sed // have a value greater than zero. 1567198954Srdivacky if (ConstVal.isSigned() && ConstVal.isNegative()) { 1568218893Sdim if (Entity) 1569218893Sdim Diag(ArraySize->getLocStart(), diag::err_decl_negative_array_size) 1570218893Sdim << getPrintableNameForEntity(Entity) << ArraySize->getSourceRange(); 1571218893Sdim else 1572218893Sdim Diag(ArraySize->getLocStart(), diag::err_typecheck_negative_array_size) 1573218893Sdim << ArraySize->getSourceRange(); 1574198954Srdivacky return QualType(); 1575198092Srdivacky } 1576198954Srdivacky if (ConstVal == 0) { 1577206084Srdivacky // GCC accepts zero sized static arrays. We allow them when 1578206084Srdivacky // we're not in a SFINAE context. 1579239462Sdim Diag(ArraySize->getLocStart(), 1580206084Srdivacky isSFINAEContext()? diag::err_typecheck_zero_array_size 1581206084Srdivacky : diag::ext_typecheck_zero_array_size) 1582198954Srdivacky << ArraySize->getSourceRange(); 1583234353Sdim 1584234353Sdim if (ASM == ArrayType::Static) { 1585234353Sdim Diag(ArraySize->getLocStart(), 1586234353Sdim diag::warn_typecheck_zero_static_array_size) 1587234353Sdim << ArraySize->getSourceRange(); 1588234353Sdim ASM = ArrayType::Normal; 1589234353Sdim } 1590239462Sdim } else if (!T->isDependentType() && !T->isVariablyModifiedType() && 1591263508Sdim !T->isIncompleteType() && !T->isUndeducedType()) { 1592239462Sdim // Is the array too large? 1593212904Sdim unsigned ActiveSizeBits 1594212904Sdim = ConstantArrayType::getNumAddressingBits(Context, T, ConstVal); 1595263508Sdim if (ActiveSizeBits > ConstantArrayType::getMaxSizeBits(Context)) { 1596212904Sdim Diag(ArraySize->getLocStart(), diag::err_array_too_large) 1597212904Sdim << ConstVal.toString(10) 1598212904Sdim << ArraySize->getSourceRange(); 1599263508Sdim return QualType(); 1600263508Sdim } 1601198954Srdivacky } 1602239462Sdim 1603198398Srdivacky T = Context.getConstantArrayType(T, ConstVal, ASM, Quals); 1604193326Sed } 1605249423Sdim 1606249423Sdim // OpenCL v1.2 s6.9.d: variable length arrays are not supported. 1607249423Sdim if (getLangOpts().OpenCL && T->isVariableArrayType()) { 1608249423Sdim Diag(Loc, diag::err_opencl_vla); 1609249423Sdim return QualType(); 1610249423Sdim } 1611193326Sed // If this is not C99, extwarn about VLA's and C99 array size modifiers. 1612234353Sdim if (!getLangOpts().C99) { 1613208600Srdivacky if (T->isVariableArrayType()) { 1614208600Srdivacky // Prohibit the use of non-POD types in VLAs. 1615224145Sdim QualType BaseT = Context.getBaseElementType(T); 1616239462Sdim if (!T->isDependentType() && 1617224145Sdim !BaseT.isPODType(Context) && 1618224145Sdim !BaseT->isObjCLifetimeType()) { 1619208600Srdivacky Diag(Loc, diag::err_vla_non_pod) 1620224145Sdim << BaseT; 1621208600Srdivacky return QualType(); 1622239462Sdim } 1623208600Srdivacky // Prohibit the use of VLAs during template argument deduction. 1624208600Srdivacky else if (isSFINAEContext()) { 1625208600Srdivacky Diag(Loc, diag::err_vla_in_sfinae); 1626208600Srdivacky return QualType(); 1627208600Srdivacky } 1628208600Srdivacky // Just extwarn about VLAs. 1629208600Srdivacky else 1630263508Sdim Diag(Loc, diag::ext_vla); 1631208600Srdivacky } else if (ASM != ArrayType::Normal || Quals != 0) 1632234353Sdim Diag(Loc, 1633234353Sdim getLangOpts().CPlusPlus? diag::err_c99_array_usage_cxx 1634234353Sdim : diag::ext_c99_array_usage) << ASM; 1635193326Sed } 1636193326Sed 1637249423Sdim if (T->isVariableArrayType()) { 1638249423Sdim // Warn about VLAs for -Wvla. 1639249423Sdim Diag(Loc, diag::warn_vla_used); 1640249423Sdim } 1641249423Sdim 1642193326Sed return T; 1643193326Sed} 1644194613Sed 1645194613Sed/// \brief Build an ext-vector type. 1646194613Sed/// 1647194613Sed/// Run the required checks for the extended vector type. 1648212904SdimQualType Sema::BuildExtVectorType(QualType T, Expr *ArraySize, 1649194613Sed SourceLocation AttrLoc) { 1650194613Sed // unlike gcc's vector_size attribute, we do not allow vectors to be defined 1651194613Sed // in conjunction with complex types (pointers, arrays, functions, etc.). 1652198092Srdivacky if (!T->isDependentType() && 1653194613Sed !T->isIntegerType() && !T->isRealFloatingType()) { 1654194613Sed Diag(AttrLoc, diag::err_attribute_invalid_vector_type) << T; 1655194613Sed return QualType(); 1656194613Sed } 1657194613Sed 1658212904Sdim if (!ArraySize->isTypeDependent() && !ArraySize->isValueDependent()) { 1659194613Sed llvm::APSInt vecSize(32); 1660212904Sdim if (!ArraySize->isIntegerConstantExpr(vecSize, Context)) { 1661263508Sdim Diag(AttrLoc, diag::err_attribute_argument_type) 1662263508Sdim << "ext_vector_type" << AANT_ArgumentIntegerConstant 1663263508Sdim << ArraySize->getSourceRange(); 1664194613Sed return QualType(); 1665194613Sed } 1666198092Srdivacky 1667198092Srdivacky // unlike gcc's vector_size attribute, the size is specified as the 1668194613Sed // number of elements, not the number of bytes. 1669198092Srdivacky unsigned vectorSize = static_cast<unsigned>(vecSize.getZExtValue()); 1670198092Srdivacky 1671194613Sed if (vectorSize == 0) { 1672194613Sed Diag(AttrLoc, diag::err_attribute_zero_size) 1673212904Sdim << ArraySize->getSourceRange(); 1674194613Sed return QualType(); 1675194613Sed } 1676198092Srdivacky 1677263508Sdim if (VectorType::isVectorSizeTooLarge(vectorSize)) { 1678263508Sdim Diag(AttrLoc, diag::err_attribute_size_too_large) 1679263508Sdim << ArraySize->getSourceRange(); 1680263508Sdim return QualType(); 1681263508Sdim } 1682263508Sdim 1683224145Sdim return Context.getExtVectorType(T, vectorSize); 1684198092Srdivacky } 1685198092Srdivacky 1686212904Sdim return Context.getDependentSizedExtVectorType(T, ArraySize, AttrLoc); 1687194613Sed} 1688198092Srdivacky 1689263508Sdimbool Sema::CheckFunctionReturnType(QualType T, SourceLocation Loc) { 1690193326Sed if (T->isArrayType() || T->isFunctionType()) { 1691239462Sdim Diag(Loc, diag::err_func_returning_array_function) 1692202379Srdivacky << T->isFunctionType() << T; 1693263508Sdim return true; 1694193326Sed } 1695226633Sdim 1696226633Sdim // Functions cannot return half FP. 1697226633Sdim if (T->isHalfType()) { 1698226633Sdim Diag(Loc, diag::err_parameters_retval_cannot_have_fp16_type) << 1 << 1699226633Sdim FixItHint::CreateInsertion(Loc, "*"); 1700263508Sdim return true; 1701226633Sdim } 1702226633Sdim 1703263508Sdim // Methods cannot return interface types. All ObjC objects are 1704263508Sdim // passed by reference. 1705263508Sdim if (T->isObjCObjectType()) { 1706263508Sdim Diag(Loc, diag::err_object_cannot_be_passed_returned_by_value) << 0 << T; 1707263508Sdim return 0; 1708263508Sdim } 1709263508Sdim 1710263508Sdim return false; 1711263508Sdim} 1712263508Sdim 1713263508SdimQualType Sema::BuildFunctionType(QualType T, 1714263508Sdim llvm::MutableArrayRef<QualType> ParamTypes, 1715263508Sdim SourceLocation Loc, DeclarationName Entity, 1716263508Sdim const FunctionProtoType::ExtProtoInfo &EPI) { 1717193326Sed bool Invalid = false; 1718263508Sdim 1719263508Sdim Invalid |= CheckFunctionReturnType(T, Loc); 1720263508Sdim 1721249423Sdim for (unsigned Idx = 0, Cnt = ParamTypes.size(); Idx < Cnt; ++Idx) { 1722226633Sdim // FIXME: Loc is too inprecise here, should use proper locations for args. 1723224145Sdim QualType ParamType = Context.getAdjustedParameterType(ParamTypes[Idx]); 1724193326Sed if (ParamType->isVoidType()) { 1725193326Sed Diag(Loc, diag::err_param_with_void_type); 1726193326Sed Invalid = true; 1727226633Sdim } else if (ParamType->isHalfType()) { 1728226633Sdim // Disallow half FP arguments. 1729226633Sdim Diag(Loc, diag::err_parameters_retval_cannot_have_fp16_type) << 0 << 1730226633Sdim FixItHint::CreateInsertion(Loc, "*"); 1731226633Sdim Invalid = true; 1732193326Sed } 1733193326Sed 1734198398Srdivacky ParamTypes[Idx] = ParamType; 1735193326Sed } 1736193326Sed 1737193326Sed if (Invalid) 1738193326Sed return QualType(); 1739193326Sed 1740249423Sdim return Context.getFunctionType(T, ParamTypes, EPI); 1741193326Sed} 1742198092Srdivacky 1743194179Sed/// \brief Build a member pointer type \c T Class::*. 1744194179Sed/// 1745194179Sed/// \param T the type to which the member pointer refers. 1746194179Sed/// \param Class the class type into which the member pointer points. 1747194179Sed/// \param Loc the location where this type begins 1748194179Sed/// \param Entity the name of the entity that will have this member pointer type 1749194179Sed/// 1750194179Sed/// \returns a member pointer type, if successful, or a NULL type if there was 1751194179Sed/// an error. 1752198092SrdivackyQualType Sema::BuildMemberPointerType(QualType T, QualType Class, 1753210299Sed SourceLocation Loc, 1754194179Sed DeclarationName Entity) { 1755194179Sed // Verify that we're not building a pointer to pointer to function with 1756194179Sed // exception specification. 1757194179Sed if (CheckDistantExceptionSpec(T)) { 1758194179Sed Diag(Loc, diag::err_distant_exception_spec); 1759194179Sed 1760194179Sed // FIXME: If we're doing this as part of template instantiation, 1761194179Sed // we should return immediately. 1762194179Sed 1763194179Sed // Build the type anyway, but use the canonical type so that the 1764194179Sed // exception specifiers are stripped off. 1765194179Sed T = Context.getCanonicalType(T); 1766194179Sed } 1767194179Sed 1768210299Sed // C++ 8.3.3p3: A pointer to member shall not point to ... a member 1769194179Sed // with reference type, or "cv void." 1770194179Sed if (T->isReferenceType()) { 1771195341Sed Diag(Loc, diag::err_illegal_decl_mempointer_to_reference) 1772198893Srdivacky << (Entity? Entity.getAsString() : "type name") << T; 1773194179Sed return QualType(); 1774194179Sed } 1775194179Sed 1776194179Sed if (T->isVoidType()) { 1777194179Sed Diag(Loc, diag::err_illegal_decl_mempointer_to_void) 1778194179Sed << (Entity? Entity.getAsString() : "type name"); 1779194179Sed return QualType(); 1780194179Sed } 1781194179Sed 1782194179Sed if (!Class->isDependentType() && !Class->isRecordType()) { 1783194179Sed Diag(Loc, diag::err_mempointer_in_nonclass_type) << Class; 1784194179Sed return QualType(); 1785194179Sed } 1786194179Sed 1787249423Sdim // C++ allows the class type in a member pointer to be an incomplete type. 1788249423Sdim // In the Microsoft ABI, the size of the member pointer can vary 1789249423Sdim // according to the class type, which means that we really need a 1790249423Sdim // complete type if possible, which means we need to instantiate templates. 1791249423Sdim // 1792249423Sdim // If template instantiation fails or the type is just incomplete, we have to 1793249423Sdim // add an extra slot to the member pointer. Yes, this does cause problems 1794249423Sdim // when passing pointers between TUs that disagree about the size. 1795249423Sdim if (Context.getTargetInfo().getCXXABI().isMicrosoft()) { 1796249423Sdim CXXRecordDecl *RD = Class->getAsCXXRecordDecl(); 1797249423Sdim if (RD && !RD->hasAttr<MSInheritanceAttr>()) { 1798249423Sdim // Lock in the inheritance model on the first use of a member pointer. 1799249423Sdim // Otherwise we may disagree about the size at different points in the TU. 1800249423Sdim // FIXME: MSVC picks a model on the first use that needs to know the size, 1801249423Sdim // rather than on the first mention of the type, e.g. typedefs. 1802249423Sdim if (RequireCompleteType(Loc, Class, 0) && !RD->isBeingDefined()) { 1803249423Sdim // We know it doesn't have an attribute and it's incomplete, so use the 1804249423Sdim // unspecified inheritance model. If we're in the record body, we can 1805249423Sdim // figure out the inheritance model. 1806249423Sdim for (CXXRecordDecl::redecl_iterator I = RD->redecls_begin(), 1807249423Sdim E = RD->redecls_end(); I != E; ++I) { 1808249423Sdim I->addAttr(::new (Context) UnspecifiedInheritanceAttr( 1809249423Sdim RD->getSourceRange(), Context)); 1810249423Sdim } 1811249423Sdim } 1812249423Sdim } 1813249423Sdim } 1814212904Sdim 1815263508Sdim // FIXME: Adjust member function pointer calling conventions. 1816263508Sdim 1817210299Sed return Context.getMemberPointerType(T, Class.getTypePtr()); 1818194179Sed} 1819198092Srdivacky 1820194179Sed/// \brief Build a block pointer type. 1821194179Sed/// 1822194179Sed/// \param T The type to which we'll be building a block pointer. 1823194179Sed/// 1824239462Sdim/// \param Loc The source location, used for diagnostics. 1825194179Sed/// 1826194179Sed/// \param Entity The name of the entity that involves the block pointer 1827194179Sed/// type, if known. 1828194179Sed/// 1829194179Sed/// \returns A suitable block pointer type, if there are no 1830194179Sed/// errors. Otherwise, returns a NULL type. 1831239462SdimQualType Sema::BuildBlockPointerType(QualType T, 1832198092Srdivacky SourceLocation Loc, 1833194179Sed DeclarationName Entity) { 1834198092Srdivacky if (!T->isFunctionType()) { 1835194179Sed Diag(Loc, diag::err_nonfunction_block_type); 1836194179Sed return QualType(); 1837194179Sed } 1838198092Srdivacky 1839210299Sed return Context.getBlockPointerType(T); 1840194179Sed} 1841194179Sed 1842212904SdimQualType Sema::GetTypeFromParser(ParsedType Ty, TypeSourceInfo **TInfo) { 1843212904Sdim QualType QT = Ty.get(); 1844198893Srdivacky if (QT.isNull()) { 1845200583Srdivacky if (TInfo) *TInfo = 0; 1846198893Srdivacky return QualType(); 1847198893Srdivacky } 1848198893Srdivacky 1849200583Srdivacky TypeSourceInfo *DI = 0; 1850218893Sdim if (const LocInfoType *LIT = dyn_cast<LocInfoType>(QT)) { 1851198092Srdivacky QT = LIT->getType(); 1852200583Srdivacky DI = LIT->getTypeSourceInfo(); 1853198092Srdivacky } 1854198092Srdivacky 1855200583Srdivacky if (TInfo) *TInfo = DI; 1856198092Srdivacky return QT; 1857198092Srdivacky} 1858198092Srdivacky 1859224145Sdimstatic void transferARCOwnershipToDeclaratorChunk(TypeProcessingState &state, 1860224145Sdim Qualifiers::ObjCLifetime ownership, 1861224145Sdim unsigned chunkIndex); 1862224145Sdim 1863224145Sdim/// Given that this is the declaration of a parameter under ARC, 1864224145Sdim/// attempt to infer attributes and such for pointer-to-whatever 1865224145Sdim/// types. 1866224145Sdimstatic void inferARCWriteback(TypeProcessingState &state, 1867224145Sdim QualType &declSpecType) { 1868224145Sdim Sema &S = state.getSema(); 1869224145Sdim Declarator &declarator = state.getDeclarator(); 1870224145Sdim 1871224145Sdim // TODO: should we care about decl qualifiers? 1872224145Sdim 1873224145Sdim // Check whether the declarator has the expected form. We walk 1874224145Sdim // from the inside out in order to make the block logic work. 1875224145Sdim unsigned outermostPointerIndex = 0; 1876224145Sdim bool isBlockPointer = false; 1877224145Sdim unsigned numPointers = 0; 1878224145Sdim for (unsigned i = 0, e = declarator.getNumTypeObjects(); i != e; ++i) { 1879224145Sdim unsigned chunkIndex = i; 1880224145Sdim DeclaratorChunk &chunk = declarator.getTypeObject(chunkIndex); 1881224145Sdim switch (chunk.Kind) { 1882224145Sdim case DeclaratorChunk::Paren: 1883224145Sdim // Ignore parens. 1884224145Sdim break; 1885224145Sdim 1886224145Sdim case DeclaratorChunk::Reference: 1887224145Sdim case DeclaratorChunk::Pointer: 1888224145Sdim // Count the number of pointers. Treat references 1889224145Sdim // interchangeably as pointers; if they're mis-ordered, normal 1890224145Sdim // type building will discover that. 1891224145Sdim outermostPointerIndex = chunkIndex; 1892224145Sdim numPointers++; 1893224145Sdim break; 1894224145Sdim 1895224145Sdim case DeclaratorChunk::BlockPointer: 1896224145Sdim // If we have a pointer to block pointer, that's an acceptable 1897224145Sdim // indirect reference; anything else is not an application of 1898224145Sdim // the rules. 1899224145Sdim if (numPointers != 1) return; 1900224145Sdim numPointers++; 1901224145Sdim outermostPointerIndex = chunkIndex; 1902224145Sdim isBlockPointer = true; 1903224145Sdim 1904224145Sdim // We don't care about pointer structure in return values here. 1905224145Sdim goto done; 1906224145Sdim 1907224145Sdim case DeclaratorChunk::Array: // suppress if written (id[])? 1908224145Sdim case DeclaratorChunk::Function: 1909224145Sdim case DeclaratorChunk::MemberPointer: 1910224145Sdim return; 1911224145Sdim } 1912224145Sdim } 1913224145Sdim done: 1914224145Sdim 1915224145Sdim // If we have *one* pointer, then we want to throw the qualifier on 1916224145Sdim // the declaration-specifiers, which means that it needs to be a 1917224145Sdim // retainable object type. 1918224145Sdim if (numPointers == 1) { 1919224145Sdim // If it's not a retainable object type, the rule doesn't apply. 1920224145Sdim if (!declSpecType->isObjCRetainableType()) return; 1921224145Sdim 1922224145Sdim // If it already has lifetime, don't do anything. 1923224145Sdim if (declSpecType.getObjCLifetime()) return; 1924224145Sdim 1925224145Sdim // Otherwise, modify the type in-place. 1926224145Sdim Qualifiers qs; 1927239462Sdim 1928224145Sdim if (declSpecType->isObjCARCImplicitlyUnretainedType()) 1929224145Sdim qs.addObjCLifetime(Qualifiers::OCL_ExplicitNone); 1930224145Sdim else 1931224145Sdim qs.addObjCLifetime(Qualifiers::OCL_Autoreleasing); 1932224145Sdim declSpecType = S.Context.getQualifiedType(declSpecType, qs); 1933224145Sdim 1934224145Sdim // If we have *two* pointers, then we want to throw the qualifier on 1935224145Sdim // the outermost pointer. 1936224145Sdim } else if (numPointers == 2) { 1937224145Sdim // If we don't have a block pointer, we need to check whether the 1938224145Sdim // declaration-specifiers gave us something that will turn into a 1939224145Sdim // retainable object pointer after we slap the first pointer on it. 1940224145Sdim if (!isBlockPointer && !declSpecType->isObjCObjectType()) 1941224145Sdim return; 1942224145Sdim 1943224145Sdim // Look for an explicit lifetime attribute there. 1944224145Sdim DeclaratorChunk &chunk = declarator.getTypeObject(outermostPointerIndex); 1945224145Sdim if (chunk.Kind != DeclaratorChunk::Pointer && 1946224145Sdim chunk.Kind != DeclaratorChunk::BlockPointer) 1947224145Sdim return; 1948224145Sdim for (const AttributeList *attr = chunk.getAttrs(); attr; 1949224145Sdim attr = attr->getNext()) 1950239462Sdim if (attr->getKind() == AttributeList::AT_ObjCOwnership) 1951224145Sdim return; 1952224145Sdim 1953224145Sdim transferARCOwnershipToDeclaratorChunk(state, Qualifiers::OCL_Autoreleasing, 1954224145Sdim outermostPointerIndex); 1955224145Sdim 1956224145Sdim // Any other number of pointers/references does not trigger the rule. 1957224145Sdim } else return; 1958224145Sdim 1959224145Sdim // TODO: mark whether we did this inference? 1960224145Sdim} 1961224145Sdim 1962249423Sdimstatic void diagnoseIgnoredQualifiers( 1963249423Sdim Sema &S, unsigned Quals, 1964249423Sdim SourceLocation FallbackLoc, 1965249423Sdim SourceLocation ConstQualLoc = SourceLocation(), 1966249423Sdim SourceLocation VolatileQualLoc = SourceLocation(), 1967249423Sdim SourceLocation RestrictQualLoc = SourceLocation(), 1968249423Sdim SourceLocation AtomicQualLoc = SourceLocation()) { 1969249423Sdim if (!Quals) 1970249423Sdim return; 1971249423Sdim 1972249423Sdim const SourceManager &SM = S.getSourceManager(); 1973249423Sdim 1974249423Sdim struct Qual { 1975249423Sdim unsigned Mask; 1976249423Sdim const char *Name; 1977249423Sdim SourceLocation Loc; 1978249423Sdim } const QualKinds[4] = { 1979249423Sdim { DeclSpec::TQ_const, "const", ConstQualLoc }, 1980249423Sdim { DeclSpec::TQ_volatile, "volatile", VolatileQualLoc }, 1981249423Sdim { DeclSpec::TQ_restrict, "restrict", RestrictQualLoc }, 1982249423Sdim { DeclSpec::TQ_atomic, "_Atomic", AtomicQualLoc } 1983249423Sdim }; 1984249423Sdim 1985263508Sdim SmallString<32> QualStr; 1986219077Sdim unsigned NumQuals = 0; 1987219077Sdim SourceLocation Loc; 1988249423Sdim FixItHint FixIts[4]; 1989219077Sdim 1990249423Sdim // Build a string naming the redundant qualifiers. 1991249423Sdim for (unsigned I = 0; I != 4; ++I) { 1992249423Sdim if (Quals & QualKinds[I].Mask) { 1993249423Sdim if (!QualStr.empty()) QualStr += ' '; 1994249423Sdim QualStr += QualKinds[I].Name; 1995219077Sdim 1996249423Sdim // If we have a location for the qualifier, offer a fixit. 1997249423Sdim SourceLocation QualLoc = QualKinds[I].Loc; 1998249423Sdim if (!QualLoc.isInvalid()) { 1999249423Sdim FixIts[NumQuals] = FixItHint::CreateRemoval(QualLoc); 2000249423Sdim if (Loc.isInvalid() || SM.isBeforeInTranslationUnit(QualLoc, Loc)) 2001249423Sdim Loc = QualLoc; 2002249423Sdim } 2003223017Sdim 2004249423Sdim ++NumQuals; 2005249423Sdim } 2006219077Sdim } 2007249423Sdim 2008249423Sdim S.Diag(Loc.isInvalid() ? FallbackLoc : Loc, diag::warn_qual_return_type) 2009249423Sdim << QualStr << NumQuals << FixIts[0] << FixIts[1] << FixIts[2] << FixIts[3]; 2010249423Sdim} 2011249423Sdim 2012249423Sdim// Diagnose pointless type qualifiers on the return type of a function. 2013249423Sdimstatic void diagnoseIgnoredFunctionQualifiers(Sema &S, QualType RetTy, 2014249423Sdim Declarator &D, 2015249423Sdim unsigned FunctionChunkIndex) { 2016249423Sdim if (D.getTypeObject(FunctionChunkIndex).Fun.hasTrailingReturnType()) { 2017249423Sdim // FIXME: TypeSourceInfo doesn't preserve location information for 2018249423Sdim // qualifiers. 2019249423Sdim diagnoseIgnoredQualifiers(S, RetTy.getLocalCVRQualifiers(), 2020249423Sdim D.getIdentifierLoc()); 2021249423Sdim return; 2022219077Sdim } 2023249423Sdim 2024249423Sdim for (unsigned OuterChunkIndex = FunctionChunkIndex + 1, 2025249423Sdim End = D.getNumTypeObjects(); 2026249423Sdim OuterChunkIndex != End; ++OuterChunkIndex) { 2027249423Sdim DeclaratorChunk &OuterChunk = D.getTypeObject(OuterChunkIndex); 2028249423Sdim switch (OuterChunk.Kind) { 2029249423Sdim case DeclaratorChunk::Paren: 2030249423Sdim continue; 2031249423Sdim 2032249423Sdim case DeclaratorChunk::Pointer: { 2033249423Sdim DeclaratorChunk::PointerTypeInfo &PTI = OuterChunk.Ptr; 2034249423Sdim diagnoseIgnoredQualifiers( 2035249423Sdim S, PTI.TypeQuals, 2036249423Sdim SourceLocation(), 2037249423Sdim SourceLocation::getFromRawEncoding(PTI.ConstQualLoc), 2038249423Sdim SourceLocation::getFromRawEncoding(PTI.VolatileQualLoc), 2039249423Sdim SourceLocation::getFromRawEncoding(PTI.RestrictQualLoc), 2040249423Sdim SourceLocation::getFromRawEncoding(PTI.AtomicQualLoc)); 2041249423Sdim return; 2042249423Sdim } 2043249423Sdim 2044249423Sdim case DeclaratorChunk::Function: 2045249423Sdim case DeclaratorChunk::BlockPointer: 2046249423Sdim case DeclaratorChunk::Reference: 2047249423Sdim case DeclaratorChunk::Array: 2048249423Sdim case DeclaratorChunk::MemberPointer: 2049249423Sdim // FIXME: We can't currently provide an accurate source location and a 2050249423Sdim // fix-it hint for these. 2051249423Sdim unsigned AtomicQual = RetTy->isAtomicType() ? DeclSpec::TQ_atomic : 0; 2052249423Sdim diagnoseIgnoredQualifiers(S, RetTy.getCVRQualifiers() | AtomicQual, 2053249423Sdim D.getIdentifierLoc()); 2054249423Sdim return; 2055249423Sdim } 2056249423Sdim 2057249423Sdim llvm_unreachable("unknown declarator chunk kind"); 2058219077Sdim } 2059219077Sdim 2060249423Sdim // If the qualifiers come from a conversion function type, don't diagnose 2061249423Sdim // them -- they're not necessarily redundant, since such a conversion 2062249423Sdim // operator can be explicitly called as "x.operator const int()". 2063249423Sdim if (D.getName().getKind() == UnqualifiedId::IK_ConversionFunctionId) 2064249423Sdim return; 2065219077Sdim 2066249423Sdim // Just parens all the way out to the decl specifiers. Diagnose any qualifiers 2067249423Sdim // which are present there. 2068249423Sdim diagnoseIgnoredQualifiers(S, D.getDeclSpec().getTypeQualifiers(), 2069249423Sdim D.getIdentifierLoc(), 2070249423Sdim D.getDeclSpec().getConstSpecLoc(), 2071249423Sdim D.getDeclSpec().getVolatileSpecLoc(), 2072249423Sdim D.getDeclSpec().getRestrictSpecLoc(), 2073249423Sdim D.getDeclSpec().getAtomicSpecLoc()); 2074219077Sdim} 2075219077Sdim 2076224145Sdimstatic QualType GetDeclSpecTypeForDeclarator(TypeProcessingState &state, 2077224145Sdim TypeSourceInfo *&ReturnTypeInfo) { 2078224145Sdim Sema &SemaRef = state.getSema(); 2079224145Sdim Declarator &D = state.getDeclarator(); 2080193326Sed QualType T; 2081224145Sdim ReturnTypeInfo = 0; 2082203955Srdivacky 2083224145Sdim // The TagDecl owned by the DeclSpec. 2084224145Sdim TagDecl *OwnedTagDecl = 0; 2085218893Sdim 2086251662Sdim bool ContainsPlaceholderType = false; 2087251662Sdim 2088198893Srdivacky switch (D.getName().getKind()) { 2089224145Sdim case UnqualifiedId::IK_ImplicitSelfParam: 2090221345Sdim case UnqualifiedId::IK_OperatorFunctionId: 2091198893Srdivacky case UnqualifiedId::IK_Identifier: 2092199990Srdivacky case UnqualifiedId::IK_LiteralOperatorId: 2093198893Srdivacky case UnqualifiedId::IK_TemplateId: 2094224145Sdim T = ConvertDeclSpecToType(state); 2095251662Sdim ContainsPlaceholderType = D.getDeclSpec().containsPlaceholderType(); 2096239462Sdim 2097203955Srdivacky if (!D.isInvalidType() && D.getDeclSpec().isTypeSpecOwned()) { 2098224145Sdim OwnedTagDecl = cast<TagDecl>(D.getDeclSpec().getRepAsDecl()); 2099221345Sdim // Owned declaration is embedded in declarator. 2100224145Sdim OwnedTagDecl->setEmbeddedInDeclarator(true); 2101203955Srdivacky } 2102193326Sed break; 2103193326Sed 2104198893Srdivacky case UnqualifiedId::IK_ConstructorName: 2105202379Srdivacky case UnqualifiedId::IK_ConstructorTemplateId: 2106198893Srdivacky case UnqualifiedId::IK_DestructorName: 2107193326Sed // Constructors and destructors don't have return types. Use 2108239462Sdim // "void" instead. 2109224145Sdim T = SemaRef.Context.VoidTy; 2110239462Sdim if (AttributeList *attrs = D.getDeclSpec().getAttributes().getList()) 2111249423Sdim processTypeAttrs(state, T, TAL_DeclSpec, attrs); 2112193326Sed break; 2113202379Srdivacky 2114202379Srdivacky case UnqualifiedId::IK_ConversionFunctionId: 2115202379Srdivacky // The result type of a conversion function is the type that it 2116202379Srdivacky // converts to. 2117239462Sdim T = SemaRef.GetTypeFromParser(D.getName().ConversionFunctionId, 2118224145Sdim &ReturnTypeInfo); 2119251662Sdim ContainsPlaceholderType = T->getContainedAutoType(); 2120202379Srdivacky break; 2121193326Sed } 2122200583Srdivacky 2123218893Sdim if (D.getAttributes()) 2124218893Sdim distributeTypeAttrsFromDeclarator(state, T); 2125218893Sdim 2126234353Sdim // C++11 [dcl.spec.auto]p5: reject 'auto' if it is not in an allowed context. 2127234353Sdim // In C++11, a function declarator using 'auto' must have a trailing return 2128219077Sdim // type (this is checked later) and we can skip this. In other languages 2129219077Sdim // using auto, we need to check regardless. 2130263508Sdim // C++14 In generic lambdas allow 'auto' in their parameters. 2131251662Sdim if (ContainsPlaceholderType && 2132249423Sdim (!SemaRef.getLangOpts().CPlusPlus11 || !D.isFunctionDeclarator())) { 2133195099Sed int Error = -1; 2134198092Srdivacky 2135195099Sed switch (D.getContext()) { 2136195099Sed case Declarator::KNRTypeListContext: 2137226633Sdim llvm_unreachable("K&R type lists aren't allowed in C++"); 2138234353Sdim case Declarator::LambdaExprContext: 2139234353Sdim llvm_unreachable("Can't specify a type specifier in lambda grammar"); 2140226633Sdim case Declarator::ObjCParameterContext: 2141226633Sdim case Declarator::ObjCResultContext: 2142195099Sed case Declarator::PrototypeContext: 2143263508Sdim Error = 0; 2144195099Sed break; 2145263508Sdim case Declarator::LambdaExprParameterContext: 2146263508Sdim if (!(SemaRef.getLangOpts().CPlusPlus1y 2147263508Sdim && D.getDeclSpec().getTypeSpecType() == DeclSpec::TST_auto)) 2148263508Sdim Error = 14; 2149263508Sdim break; 2150195099Sed case Declarator::MemberContext: 2151223017Sdim if (D.getDeclSpec().getStorageClassSpec() == DeclSpec::SCS_static) 2152223017Sdim break; 2153224145Sdim switch (cast<TagDecl>(SemaRef.CurContext)->getTagKind()) { 2154226633Sdim case TTK_Enum: llvm_unreachable("unhandled tag kind"); 2155208600Srdivacky case TTK_Struct: Error = 1; /* Struct member */ break; 2156208600Srdivacky case TTK_Union: Error = 2; /* Union member */ break; 2157208600Srdivacky case TTK_Class: Error = 3; /* Class member */ break; 2158243830Sdim case TTK_Interface: Error = 4; /* Interface member */ break; 2159198092Srdivacky } 2160195099Sed break; 2161195099Sed case Declarator::CXXCatchContext: 2162224145Sdim case Declarator::ObjCCatchContext: 2163243830Sdim Error = 5; // Exception declaration 2164195099Sed break; 2165195099Sed case Declarator::TemplateParamContext: 2166243830Sdim Error = 6; // Template parameter 2167195099Sed break; 2168195099Sed case Declarator::BlockLiteralContext: 2169243830Sdim Error = 7; // Block literal 2170195099Sed break; 2171218893Sdim case Declarator::TemplateTypeArgContext: 2172243830Sdim Error = 8; // Template type argument 2173218893Sdim break; 2174221345Sdim case Declarator::AliasDeclContext: 2175223017Sdim case Declarator::AliasTemplateContext: 2176243830Sdim Error = 10; // Type alias 2177221345Sdim break; 2178234353Sdim case Declarator::TrailingReturnContext: 2179251662Sdim if (!SemaRef.getLangOpts().CPlusPlus1y) 2180251662Sdim Error = 11; // Function return type 2181234353Sdim break; 2182251662Sdim case Declarator::ConversionIdContext: 2183251662Sdim if (!SemaRef.getLangOpts().CPlusPlus1y) 2184251662Sdim Error = 12; // conversion-type-id 2185251662Sdim break; 2186218893Sdim case Declarator::TypeNameContext: 2187251662Sdim Error = 13; // Generic 2188218893Sdim break; 2189195099Sed case Declarator::FileContext: 2190195099Sed case Declarator::BlockContext: 2191195099Sed case Declarator::ForContext: 2192195099Sed case Declarator::ConditionContext: 2193224145Sdim case Declarator::CXXNewContext: 2194195099Sed break; 2195195099Sed } 2196195099Sed 2197219077Sdim if (D.getDeclSpec().getStorageClassSpec() == DeclSpec::SCS_typedef) 2198243830Sdim Error = 9; 2199219077Sdim 2200219077Sdim // In Objective-C it is an error to use 'auto' on a function declarator. 2201219077Sdim if (D.isFunctionDeclarator()) 2202243830Sdim Error = 11; 2203219077Sdim 2204234353Sdim // C++11 [dcl.spec.auto]p2: 'auto' is always fine if the declarator 2205219077Sdim // contains a trailing return type. That is only legal at the outermost 2206219077Sdim // level. Check all declarator chunks (outermost first) anyway, to give 2207219077Sdim // better diagnostics. 2208249423Sdim if (SemaRef.getLangOpts().CPlusPlus11 && Error != -1) { 2209219077Sdim for (unsigned i = 0, e = D.getNumTypeObjects(); i != e; ++i) { 2210219077Sdim unsigned chunkIndex = e - i - 1; 2211219077Sdim state.setCurrentChunkIndex(chunkIndex); 2212219077Sdim DeclaratorChunk &DeclType = D.getTypeObject(chunkIndex); 2213219077Sdim if (DeclType.Kind == DeclaratorChunk::Function) { 2214219077Sdim const DeclaratorChunk::FunctionTypeInfo &FTI = DeclType.Fun; 2215239462Sdim if (FTI.hasTrailingReturnType()) { 2216219077Sdim Error = -1; 2217219077Sdim break; 2218219077Sdim } 2219219077Sdim } 2220219077Sdim } 2221219077Sdim } 2222219077Sdim 2223251662Sdim SourceRange AutoRange = D.getDeclSpec().getTypeSpecTypeLoc(); 2224251662Sdim if (D.getName().getKind() == UnqualifiedId::IK_ConversionFunctionId) 2225251662Sdim AutoRange = D.getName().getSourceRange(); 2226251662Sdim 2227195099Sed if (Error != -1) { 2228263508Sdim const bool IsDeclTypeAuto = 2229263508Sdim D.getDeclSpec().getTypeSpecType() == DeclSpec::TST_decltype_auto; 2230251662Sdim SemaRef.Diag(AutoRange.getBegin(), diag::err_auto_not_allowed) 2231263508Sdim << IsDeclTypeAuto << Error << AutoRange; 2232224145Sdim T = SemaRef.Context.IntTy; 2233195099Sed D.setInvalidType(true); 2234234353Sdim } else 2235251662Sdim SemaRef.Diag(AutoRange.getBegin(), 2236251662Sdim diag::warn_cxx98_compat_auto_type_specifier) 2237251662Sdim << AutoRange; 2238195099Sed } 2239218893Sdim 2240234353Sdim if (SemaRef.getLangOpts().CPlusPlus && 2241226633Sdim OwnedTagDecl && OwnedTagDecl->isCompleteDefinition()) { 2242224145Sdim // Check the contexts where C++ forbids the declaration of a new class 2243224145Sdim // or enumeration in a type-specifier-seq. 2244224145Sdim switch (D.getContext()) { 2245234353Sdim case Declarator::TrailingReturnContext: 2246234353Sdim // Class and enumeration definitions are syntactically not allowed in 2247234353Sdim // trailing return types. 2248234353Sdim llvm_unreachable("parser should not have allowed this"); 2249234353Sdim break; 2250224145Sdim case Declarator::FileContext: 2251224145Sdim case Declarator::MemberContext: 2252224145Sdim case Declarator::BlockContext: 2253224145Sdim case Declarator::ForContext: 2254224145Sdim case Declarator::BlockLiteralContext: 2255234353Sdim case Declarator::LambdaExprContext: 2256234353Sdim // C++11 [dcl.type]p3: 2257224145Sdim // A type-specifier-seq shall not define a class or enumeration unless 2258224145Sdim // it appears in the type-id of an alias-declaration (7.1.3) that is not 2259224145Sdim // the declaration of a template-declaration. 2260224145Sdim case Declarator::AliasDeclContext: 2261224145Sdim break; 2262224145Sdim case Declarator::AliasTemplateContext: 2263224145Sdim SemaRef.Diag(OwnedTagDecl->getLocation(), 2264224145Sdim diag::err_type_defined_in_alias_template) 2265224145Sdim << SemaRef.Context.getTypeDeclType(OwnedTagDecl); 2266249423Sdim D.setInvalidType(true); 2267224145Sdim break; 2268224145Sdim case Declarator::TypeNameContext: 2269251662Sdim case Declarator::ConversionIdContext: 2270224145Sdim case Declarator::TemplateParamContext: 2271224145Sdim case Declarator::CXXNewContext: 2272224145Sdim case Declarator::CXXCatchContext: 2273224145Sdim case Declarator::ObjCCatchContext: 2274224145Sdim case Declarator::TemplateTypeArgContext: 2275224145Sdim SemaRef.Diag(OwnedTagDecl->getLocation(), 2276224145Sdim diag::err_type_defined_in_type_specifier) 2277224145Sdim << SemaRef.Context.getTypeDeclType(OwnedTagDecl); 2278249423Sdim D.setInvalidType(true); 2279224145Sdim break; 2280224145Sdim case Declarator::PrototypeContext: 2281263508Sdim case Declarator::LambdaExprParameterContext: 2282226633Sdim case Declarator::ObjCParameterContext: 2283226633Sdim case Declarator::ObjCResultContext: 2284224145Sdim case Declarator::KNRTypeListContext: 2285224145Sdim // C++ [dcl.fct]p6: 2286224145Sdim // Types shall not be defined in return or parameter types. 2287224145Sdim SemaRef.Diag(OwnedTagDecl->getLocation(), 2288224145Sdim diag::err_type_defined_in_param_type) 2289224145Sdim << SemaRef.Context.getTypeDeclType(OwnedTagDecl); 2290249423Sdim D.setInvalidType(true); 2291224145Sdim break; 2292224145Sdim case Declarator::ConditionContext: 2293224145Sdim // C++ 6.4p2: 2294224145Sdim // The type-specifier-seq shall not contain typedef and shall not declare 2295224145Sdim // a new class or enumeration. 2296224145Sdim SemaRef.Diag(OwnedTagDecl->getLocation(), 2297224145Sdim diag::err_type_defined_in_condition); 2298249423Sdim D.setInvalidType(true); 2299224145Sdim break; 2300224145Sdim } 2301224145Sdim } 2302224145Sdim 2303224145Sdim return T; 2304224145Sdim} 2305224145Sdim 2306234353Sdimstatic std::string getFunctionQualifiersAsString(const FunctionProtoType *FnTy){ 2307234353Sdim std::string Quals = 2308234353Sdim Qualifiers::fromCVRMask(FnTy->getTypeQuals()).getAsString(); 2309234353Sdim 2310234353Sdim switch (FnTy->getRefQualifier()) { 2311234353Sdim case RQ_None: 2312234353Sdim break; 2313234353Sdim 2314234353Sdim case RQ_LValue: 2315234353Sdim if (!Quals.empty()) 2316234353Sdim Quals += ' '; 2317234353Sdim Quals += '&'; 2318234353Sdim break; 2319234353Sdim 2320234353Sdim case RQ_RValue: 2321234353Sdim if (!Quals.empty()) 2322234353Sdim Quals += ' '; 2323234353Sdim Quals += "&&"; 2324234353Sdim break; 2325234353Sdim } 2326234353Sdim 2327234353Sdim return Quals; 2328234353Sdim} 2329234353Sdim 2330234353Sdim/// Check that the function type T, which has a cv-qualifier or a ref-qualifier, 2331234353Sdim/// can be contained within the declarator chunk DeclType, and produce an 2332234353Sdim/// appropriate diagnostic if not. 2333234353Sdimstatic void checkQualifiedFunction(Sema &S, QualType T, 2334234353Sdim DeclaratorChunk &DeclType) { 2335234353Sdim // C++98 [dcl.fct]p4 / C++11 [dcl.fct]p6: a function type with a 2336234353Sdim // cv-qualifier or a ref-qualifier can only appear at the topmost level 2337234353Sdim // of a type. 2338234353Sdim int DiagKind = -1; 2339234353Sdim switch (DeclType.Kind) { 2340234353Sdim case DeclaratorChunk::Paren: 2341234353Sdim case DeclaratorChunk::MemberPointer: 2342234353Sdim // These cases are permitted. 2343234353Sdim return; 2344234353Sdim case DeclaratorChunk::Array: 2345234353Sdim case DeclaratorChunk::Function: 2346234353Sdim // These cases don't allow function types at all; no need to diagnose the 2347234353Sdim // qualifiers separately. 2348234353Sdim return; 2349234353Sdim case DeclaratorChunk::BlockPointer: 2350234353Sdim DiagKind = 0; 2351234353Sdim break; 2352234353Sdim case DeclaratorChunk::Pointer: 2353234353Sdim DiagKind = 1; 2354234353Sdim break; 2355234353Sdim case DeclaratorChunk::Reference: 2356234353Sdim DiagKind = 2; 2357234353Sdim break; 2358234353Sdim } 2359234353Sdim 2360234353Sdim assert(DiagKind != -1); 2361234353Sdim S.Diag(DeclType.Loc, diag::err_compound_qualified_function_type) 2362234353Sdim << DiagKind << isa<FunctionType>(T.IgnoreParens()) << T 2363234353Sdim << getFunctionQualifiersAsString(T->castAs<FunctionProtoType>()); 2364234353Sdim} 2365234353Sdim 2366239462Sdim/// Produce an approprioate diagnostic for an ambiguity between a function 2367239462Sdim/// declarator and a C++ direct-initializer. 2368239462Sdimstatic void warnAboutAmbiguousFunction(Sema &S, Declarator &D, 2369239462Sdim DeclaratorChunk &DeclType, QualType RT) { 2370239462Sdim const DeclaratorChunk::FunctionTypeInfo &FTI = DeclType.Fun; 2371239462Sdim assert(FTI.isAmbiguous && "no direct-initializer / function ambiguity"); 2372239462Sdim 2373239462Sdim // If the return type is void there is no ambiguity. 2374239462Sdim if (RT->isVoidType()) 2375239462Sdim return; 2376239462Sdim 2377239462Sdim // An initializer for a non-class type can have at most one argument. 2378239462Sdim if (!RT->isRecordType() && FTI.NumArgs > 1) 2379239462Sdim return; 2380239462Sdim 2381239462Sdim // An initializer for a reference must have exactly one argument. 2382239462Sdim if (RT->isReferenceType() && FTI.NumArgs != 1) 2383239462Sdim return; 2384239462Sdim 2385239462Sdim // Only warn if this declarator is declaring a function at block scope, and 2386239462Sdim // doesn't have a storage class (such as 'extern') specified. 2387239462Sdim if (!D.isFunctionDeclarator() || 2388239462Sdim D.getFunctionDefinitionKind() != FDK_Declaration || 2389239462Sdim !S.CurContext->isFunctionOrMethod() || 2390249423Sdim D.getDeclSpec().getStorageClassSpec() 2391239462Sdim != DeclSpec::SCS_unspecified) 2392239462Sdim return; 2393239462Sdim 2394239462Sdim // Inside a condition, a direct initializer is not permitted. We allow one to 2395239462Sdim // be parsed in order to give better diagnostics in condition parsing. 2396239462Sdim if (D.getContext() == Declarator::ConditionContext) 2397239462Sdim return; 2398239462Sdim 2399239462Sdim SourceRange ParenRange(DeclType.Loc, DeclType.EndLoc); 2400239462Sdim 2401239462Sdim S.Diag(DeclType.Loc, 2402239462Sdim FTI.NumArgs ? diag::warn_parens_disambiguated_as_function_declaration 2403239462Sdim : diag::warn_empty_parens_are_function_decl) 2404239462Sdim << ParenRange; 2405239462Sdim 2406239462Sdim // If the declaration looks like: 2407239462Sdim // T var1, 2408239462Sdim // f(); 2409239462Sdim // and name lookup finds a function named 'f', then the ',' was 2410239462Sdim // probably intended to be a ';'. 2411239462Sdim if (!D.isFirstDeclarator() && D.getIdentifier()) { 2412239462Sdim FullSourceLoc Comma(D.getCommaLoc(), S.SourceMgr); 2413239462Sdim FullSourceLoc Name(D.getIdentifierLoc(), S.SourceMgr); 2414239462Sdim if (Comma.getFileID() != Name.getFileID() || 2415239462Sdim Comma.getSpellingLineNumber() != Name.getSpellingLineNumber()) { 2416239462Sdim LookupResult Result(S, D.getIdentifier(), SourceLocation(), 2417239462Sdim Sema::LookupOrdinaryName); 2418239462Sdim if (S.LookupName(Result, S.getCurScope())) 2419239462Sdim S.Diag(D.getCommaLoc(), diag::note_empty_parens_function_call) 2420239462Sdim << FixItHint::CreateReplacement(D.getCommaLoc(), ";") 2421239462Sdim << D.getIdentifier(); 2422239462Sdim } 2423239462Sdim } 2424239462Sdim 2425239462Sdim if (FTI.NumArgs > 0) { 2426239462Sdim // For a declaration with parameters, eg. "T var(T());", suggest adding parens 2427239462Sdim // around the first parameter to turn the declaration into a variable 2428239462Sdim // declaration. 2429239462Sdim SourceRange Range = FTI.ArgInfo[0].Param->getSourceRange(); 2430239462Sdim SourceLocation B = Range.getBegin(); 2431239462Sdim SourceLocation E = S.PP.getLocForEndOfToken(Range.getEnd()); 2432239462Sdim // FIXME: Maybe we should suggest adding braces instead of parens 2433239462Sdim // in C++11 for classes that don't have an initializer_list constructor. 2434239462Sdim S.Diag(B, diag::note_additional_parens_for_variable_declaration) 2435239462Sdim << FixItHint::CreateInsertion(B, "(") 2436239462Sdim << FixItHint::CreateInsertion(E, ")"); 2437239462Sdim } else { 2438239462Sdim // For a declaration without parameters, eg. "T var();", suggest replacing the 2439239462Sdim // parens with an initializer to turn the declaration into a variable 2440239462Sdim // declaration. 2441239462Sdim const CXXRecordDecl *RD = RT->getAsCXXRecordDecl(); 2442239462Sdim 2443239462Sdim // Empty parens mean value-initialization, and no parens mean 2444239462Sdim // default initialization. These are equivalent if the default 2445239462Sdim // constructor is user-provided or if zero-initialization is a 2446239462Sdim // no-op. 2447239462Sdim if (RD && RD->hasDefinition() && 2448239462Sdim (RD->isEmpty() || RD->hasUserProvidedDefaultConstructor())) 2449239462Sdim S.Diag(DeclType.Loc, diag::note_empty_parens_default_ctor) 2450239462Sdim << FixItHint::CreateRemoval(ParenRange); 2451239462Sdim else { 2452263508Sdim std::string Init = 2453263508Sdim S.getFixItZeroInitializerForType(RT, ParenRange.getBegin()); 2454249423Sdim if (Init.empty() && S.LangOpts.CPlusPlus11) 2455239462Sdim Init = "{}"; 2456239462Sdim if (!Init.empty()) 2457239462Sdim S.Diag(DeclType.Loc, diag::note_empty_parens_zero_initialize) 2458239462Sdim << FixItHint::CreateReplacement(ParenRange, Init); 2459239462Sdim } 2460239462Sdim } 2461239462Sdim} 2462239462Sdim 2463263508Sdim/// Helper for figuring out the default CC for a function declarator type. If 2464263508Sdim/// this is the outermost chunk, then we can determine the CC from the 2465263508Sdim/// declarator context. If not, then this could be either a member function 2466263508Sdim/// type or normal function type. 2467263508Sdimstatic CallingConv 2468263508SdimgetCCForDeclaratorChunk(Sema &S, Declarator &D, 2469263508Sdim const DeclaratorChunk::FunctionTypeInfo &FTI, 2470263508Sdim unsigned ChunkIndex) { 2471263508Sdim assert(D.getTypeObject(ChunkIndex).Kind == DeclaratorChunk::Function); 2472263508Sdim 2473263508Sdim bool IsCXXInstanceMethod = false; 2474263508Sdim 2475263508Sdim if (S.getLangOpts().CPlusPlus) { 2476263508Sdim // Look inwards through parentheses to see if this chunk will form a 2477263508Sdim // member pointer type or if we're the declarator. Any type attributes 2478263508Sdim // between here and there will override the CC we choose here. 2479263508Sdim unsigned I = ChunkIndex; 2480263508Sdim bool FoundNonParen = false; 2481263508Sdim while (I && !FoundNonParen) { 2482263508Sdim --I; 2483263508Sdim if (D.getTypeObject(I).Kind != DeclaratorChunk::Paren) 2484263508Sdim FoundNonParen = true; 2485263508Sdim } 2486263508Sdim 2487263508Sdim if (FoundNonParen) { 2488263508Sdim // If we're not the declarator, we're a regular function type unless we're 2489263508Sdim // in a member pointer. 2490263508Sdim IsCXXInstanceMethod = 2491263508Sdim D.getTypeObject(I).Kind == DeclaratorChunk::MemberPointer; 2492263508Sdim } else { 2493263508Sdim // We're the innermost decl chunk, so must be a function declarator. 2494263508Sdim assert(D.isFunctionDeclarator()); 2495263508Sdim 2496263508Sdim // If we're inside a record, we're declaring a method, but it could be 2497263508Sdim // explicitly or implicitly static. 2498263508Sdim IsCXXInstanceMethod = 2499263508Sdim D.isFirstDeclarationOfMember() && 2500263508Sdim D.getDeclSpec().getStorageClassSpec() != DeclSpec::SCS_typedef && 2501263508Sdim !D.isStaticMember(); 2502263508Sdim } 2503263508Sdim } 2504263508Sdim 2505263508Sdim return S.Context.getDefaultCallingConvention(FTI.isVariadic, 2506263508Sdim IsCXXInstanceMethod); 2507263508Sdim} 2508263508Sdim 2509224145Sdimstatic TypeSourceInfo *GetFullTypeForDeclarator(TypeProcessingState &state, 2510224145Sdim QualType declSpecType, 2511224145Sdim TypeSourceInfo *TInfo) { 2512224145Sdim 2513224145Sdim QualType T = declSpecType; 2514224145Sdim Declarator &D = state.getDeclarator(); 2515224145Sdim Sema &S = state.getSema(); 2516224145Sdim ASTContext &Context = S.Context; 2517234353Sdim const LangOptions &LangOpts = S.getLangOpts(); 2518224145Sdim 2519193326Sed // The name we're declaring, if any. 2520193326Sed DeclarationName Name; 2521193326Sed if (D.getIdentifier()) 2522193326Sed Name = D.getIdentifier(); 2523193326Sed 2524221345Sdim // Does this declaration declare a typedef-name? 2525221345Sdim bool IsTypedefName = 2526221345Sdim D.getDeclSpec().getStorageClassSpec() == DeclSpec::SCS_typedef || 2527223017Sdim D.getContext() == Declarator::AliasDeclContext || 2528223017Sdim D.getContext() == Declarator::AliasTemplateContext; 2529221345Sdim 2530234353Sdim // Does T refer to a function type with a cv-qualifier or a ref-qualifier? 2531234353Sdim bool IsQualifiedFunction = T->isFunctionProtoType() && 2532234353Sdim (T->castAs<FunctionProtoType>()->getTypeQuals() != 0 || 2533234353Sdim T->castAs<FunctionProtoType>()->getRefQualifier() != RQ_None); 2534234353Sdim 2535251662Sdim // If T is 'decltype(auto)', the only declarators we can have are parens 2536251662Sdim // and at most one function declarator if this is a function declaration. 2537251662Sdim if (const AutoType *AT = T->getAs<AutoType>()) { 2538251662Sdim if (AT->isDecltypeAuto()) { 2539251662Sdim for (unsigned I = 0, E = D.getNumTypeObjects(); I != E; ++I) { 2540251662Sdim unsigned Index = E - I - 1; 2541251662Sdim DeclaratorChunk &DeclChunk = D.getTypeObject(Index); 2542251662Sdim unsigned DiagId = diag::err_decltype_auto_compound_type; 2543251662Sdim unsigned DiagKind = 0; 2544251662Sdim switch (DeclChunk.Kind) { 2545251662Sdim case DeclaratorChunk::Paren: 2546251662Sdim continue; 2547251662Sdim case DeclaratorChunk::Function: { 2548251662Sdim unsigned FnIndex; 2549251662Sdim if (D.isFunctionDeclarationContext() && 2550251662Sdim D.isFunctionDeclarator(FnIndex) && FnIndex == Index) 2551251662Sdim continue; 2552251662Sdim DiagId = diag::err_decltype_auto_function_declarator_not_declaration; 2553251662Sdim break; 2554251662Sdim } 2555251662Sdim case DeclaratorChunk::Pointer: 2556251662Sdim case DeclaratorChunk::BlockPointer: 2557251662Sdim case DeclaratorChunk::MemberPointer: 2558251662Sdim DiagKind = 0; 2559251662Sdim break; 2560251662Sdim case DeclaratorChunk::Reference: 2561251662Sdim DiagKind = 1; 2562251662Sdim break; 2563251662Sdim case DeclaratorChunk::Array: 2564251662Sdim DiagKind = 2; 2565251662Sdim break; 2566251662Sdim } 2567251662Sdim 2568251662Sdim S.Diag(DeclChunk.Loc, DiagId) << DiagKind; 2569251662Sdim D.setInvalidType(true); 2570251662Sdim break; 2571251662Sdim } 2572251662Sdim } 2573251662Sdim } 2574251662Sdim 2575193326Sed // Walk the DeclTypeInfo, building the recursive type as we go. 2576193326Sed // DeclTypeInfos are ordered from the identifier out, which is 2577193326Sed // opposite of what we want :). 2578198893Srdivacky for (unsigned i = 0, e = D.getNumTypeObjects(); i != e; ++i) { 2579218893Sdim unsigned chunkIndex = e - i - 1; 2580218893Sdim state.setCurrentChunkIndex(chunkIndex); 2581218893Sdim DeclaratorChunk &DeclType = D.getTypeObject(chunkIndex); 2582234353Sdim if (IsQualifiedFunction) { 2583234353Sdim checkQualifiedFunction(S, T, DeclType); 2584234353Sdim IsQualifiedFunction = DeclType.Kind == DeclaratorChunk::Paren; 2585234353Sdim } 2586193326Sed switch (DeclType.Kind) { 2587218893Sdim case DeclaratorChunk::Paren: 2588224145Sdim T = S.BuildParenType(T); 2589218893Sdim break; 2590193326Sed case DeclaratorChunk::BlockPointer: 2591193326Sed // If blocks are disabled, emit an error. 2592193326Sed if (!LangOpts.Blocks) 2593224145Sdim S.Diag(DeclType.Loc, diag::err_blocks_disable); 2594198092Srdivacky 2595224145Sdim T = S.BuildBlockPointerType(T, D.getIdentifierLoc(), Name); 2596210299Sed if (DeclType.Cls.TypeQuals) 2597224145Sdim T = S.BuildQualifiedType(T, DeclType.Loc, DeclType.Cls.TypeQuals); 2598193326Sed break; 2599193326Sed case DeclaratorChunk::Pointer: 2600193326Sed // Verify that we're not building a pointer to pointer to function with 2601193326Sed // exception specification. 2602224145Sdim if (LangOpts.CPlusPlus && S.CheckDistantExceptionSpec(T)) { 2603224145Sdim S.Diag(D.getIdentifierLoc(), diag::err_distant_exception_spec); 2604193326Sed D.setInvalidType(true); 2605193326Sed // Build the type anyway. 2606193326Sed } 2607224145Sdim if (LangOpts.ObjC1 && T->getAs<ObjCObjectType>()) { 2608208600Srdivacky T = Context.getObjCObjectPointerType(T); 2609210299Sed if (DeclType.Ptr.TypeQuals) 2610224145Sdim T = S.BuildQualifiedType(T, DeclType.Loc, DeclType.Ptr.TypeQuals); 2611198092Srdivacky break; 2612198092Srdivacky } 2613224145Sdim T = S.BuildPointerType(T, DeclType.Loc, Name); 2614210299Sed if (DeclType.Ptr.TypeQuals) 2615224145Sdim T = S.BuildQualifiedType(T, DeclType.Loc, DeclType.Ptr.TypeQuals); 2616218893Sdim 2617193326Sed break; 2618198092Srdivacky case DeclaratorChunk::Reference: { 2619193326Sed // Verify that we're not building a reference to pointer to function with 2620193326Sed // exception specification. 2621224145Sdim if (LangOpts.CPlusPlus && S.CheckDistantExceptionSpec(T)) { 2622224145Sdim S.Diag(D.getIdentifierLoc(), diag::err_distant_exception_spec); 2623193326Sed D.setInvalidType(true); 2624193326Sed // Build the type anyway. 2625193326Sed } 2626224145Sdim T = S.BuildReferenceType(T, DeclType.Ref.LValueRef, DeclType.Loc, Name); 2627210299Sed 2628210299Sed Qualifiers Quals; 2629210299Sed if (DeclType.Ref.HasRestrict) 2630224145Sdim T = S.BuildQualifiedType(T, DeclType.Loc, Qualifiers::Restrict); 2631193326Sed break; 2632198092Srdivacky } 2633193326Sed case DeclaratorChunk::Array: { 2634193326Sed // Verify that we're not building an array of pointers to function with 2635193326Sed // exception specification. 2636224145Sdim if (LangOpts.CPlusPlus && S.CheckDistantExceptionSpec(T)) { 2637224145Sdim S.Diag(D.getIdentifierLoc(), diag::err_distant_exception_spec); 2638193326Sed D.setInvalidType(true); 2639193326Sed // Build the type anyway. 2640193326Sed } 2641193326Sed DeclaratorChunk::ArrayTypeInfo &ATI = DeclType.Arr; 2642193326Sed Expr *ArraySize = static_cast<Expr*>(ATI.NumElts); 2643193326Sed ArrayType::ArraySizeModifier ASM; 2644193326Sed if (ATI.isStar) 2645193326Sed ASM = ArrayType::Star; 2646193326Sed else if (ATI.hasStatic) 2647193326Sed ASM = ArrayType::Static; 2648193326Sed else 2649193326Sed ASM = ArrayType::Normal; 2650221345Sdim if (ASM == ArrayType::Star && !D.isPrototypeContext()) { 2651193326Sed // FIXME: This check isn't quite right: it allows star in prototypes 2652193326Sed // for function definitions, and disallows some edge cases detailed 2653193326Sed // in http://gcc.gnu.org/ml/gcc-patches/2009-02/msg00133.html 2654224145Sdim S.Diag(DeclType.Loc, diag::err_array_star_outside_prototype); 2655193326Sed ASM = ArrayType::Normal; 2656193326Sed D.setInvalidType(true); 2657193326Sed } 2658239462Sdim 2659239462Sdim // C99 6.7.5.2p1: The optional type qualifiers and the keyword static 2660239462Sdim // shall appear only in a declaration of a function parameter with an 2661239462Sdim // array type, ... 2662239462Sdim if (ASM == ArrayType::Static || ATI.TypeQuals) { 2663239462Sdim if (!(D.isPrototypeContext() || 2664239462Sdim D.getContext() == Declarator::KNRTypeListContext)) { 2665239462Sdim S.Diag(DeclType.Loc, diag::err_array_static_outside_prototype) << 2666239462Sdim (ASM == ArrayType::Static ? "'static'" : "type qualifier"); 2667239462Sdim // Remove the 'static' and the type qualifiers. 2668239462Sdim if (ASM == ArrayType::Static) 2669239462Sdim ASM = ArrayType::Normal; 2670239462Sdim ATI.TypeQuals = 0; 2671239462Sdim D.setInvalidType(true); 2672239462Sdim } 2673239462Sdim 2674239462Sdim // C99 6.7.5.2p1: ... and then only in the outermost array type 2675239462Sdim // derivation. 2676239462Sdim unsigned x = chunkIndex; 2677239462Sdim while (x != 0) { 2678239462Sdim // Walk outwards along the declarator chunks. 2679239462Sdim x--; 2680239462Sdim const DeclaratorChunk &DC = D.getTypeObject(x); 2681239462Sdim switch (DC.Kind) { 2682239462Sdim case DeclaratorChunk::Paren: 2683239462Sdim continue; 2684239462Sdim case DeclaratorChunk::Array: 2685239462Sdim case DeclaratorChunk::Pointer: 2686239462Sdim case DeclaratorChunk::Reference: 2687239462Sdim case DeclaratorChunk::MemberPointer: 2688239462Sdim S.Diag(DeclType.Loc, diag::err_array_static_not_outermost) << 2689239462Sdim (ASM == ArrayType::Static ? "'static'" : "type qualifier"); 2690239462Sdim if (ASM == ArrayType::Static) 2691239462Sdim ASM = ArrayType::Normal; 2692239462Sdim ATI.TypeQuals = 0; 2693239462Sdim D.setInvalidType(true); 2694239462Sdim break; 2695239462Sdim case DeclaratorChunk::Function: 2696239462Sdim case DeclaratorChunk::BlockPointer: 2697239462Sdim // These are invalid anyway, so just ignore. 2698239462Sdim break; 2699239462Sdim } 2700239462Sdim } 2701239462Sdim } 2702263508Sdim const AutoType *AT = T->getContainedAutoType(); 2703263508Sdim // Allow arrays of auto if we are a generic lambda parameter. 2704263508Sdim // i.e. [](auto (&array)[5]) { return array[0]; }; OK 2705263508Sdim if (AT && D.getContext() != Declarator::LambdaExprParameterContext) { 2706251662Sdim // We've already diagnosed this for decltype(auto). 2707251662Sdim if (!AT->isDecltypeAuto()) 2708251662Sdim S.Diag(DeclType.Loc, diag::err_illegal_decl_array_of_auto) 2709251662Sdim << getPrintableNameForEntity(Name) << T; 2710251662Sdim T = QualType(); 2711251662Sdim break; 2712251662Sdim } 2713251662Sdim 2714234353Sdim T = S.BuildArrayType(T, ASM, ArraySize, ATI.TypeQuals, 2715224145Sdim SourceRange(DeclType.Loc, DeclType.EndLoc), Name); 2716193326Sed break; 2717193326Sed } 2718193326Sed case DeclaratorChunk::Function: { 2719193326Sed // If the function declarator has a prototype (i.e. it is not () and 2720193326Sed // does not have a K&R-style identifier list), then the arguments are part 2721193326Sed // of the type, otherwise the argument list is (). 2722193326Sed const DeclaratorChunk::FunctionTypeInfo &FTI = DeclType.Fun; 2723234353Sdim IsQualifiedFunction = FTI.TypeQuals || FTI.hasRefQualifier(); 2724193326Sed 2725218893Sdim // Check for auto functions and trailing return type and adjust the 2726218893Sdim // return type accordingly. 2727218893Sdim if (!D.isInvalidType()) { 2728218893Sdim // trailing-return-type is only required if we're declaring a function, 2729218893Sdim // and not, for instance, a pointer to a function. 2730218893Sdim if (D.getDeclSpec().getTypeSpecType() == DeclSpec::TST_auto && 2731251662Sdim !FTI.hasTrailingReturnType() && chunkIndex == 0 && 2732251662Sdim !S.getLangOpts().CPlusPlus1y) { 2733224145Sdim S.Diag(D.getDeclSpec().getTypeSpecTypeLoc(), 2734218893Sdim diag::err_auto_missing_trailing_return); 2735218893Sdim T = Context.IntTy; 2736218893Sdim D.setInvalidType(true); 2737239462Sdim } else if (FTI.hasTrailingReturnType()) { 2738219077Sdim // T must be exactly 'auto' at this point. See CWG issue 681. 2739219077Sdim if (isa<ParenType>(T)) { 2740224145Sdim S.Diag(D.getDeclSpec().getTypeSpecTypeLoc(), 2741219077Sdim diag::err_trailing_return_in_parens) 2742219077Sdim << T << D.getDeclSpec().getSourceRange(); 2743219077Sdim D.setInvalidType(true); 2744234353Sdim } else if (D.getContext() != Declarator::LambdaExprContext && 2745251662Sdim (T.hasQualifiers() || !isa<AutoType>(T) || 2746251662Sdim cast<AutoType>(T)->isDecltypeAuto())) { 2747224145Sdim S.Diag(D.getDeclSpec().getTypeSpecTypeLoc(), 2748218893Sdim diag::err_trailing_return_without_auto) 2749218893Sdim << T << D.getDeclSpec().getSourceRange(); 2750218893Sdim D.setInvalidType(true); 2751218893Sdim } 2752239462Sdim T = S.GetTypeFromParser(FTI.getTrailingReturnType(), &TInfo); 2753239462Sdim if (T.isNull()) { 2754239462Sdim // An error occurred parsing the trailing return type. 2755239462Sdim T = Context.IntTy; 2756239462Sdim D.setInvalidType(true); 2757239462Sdim } 2758218893Sdim } 2759218893Sdim } 2760218893Sdim 2761219077Sdim // C99 6.7.5.3p1: The return type may not be a function or array type. 2762219077Sdim // For conversion functions, we'll diagnose this particular error later. 2763219077Sdim if ((T->isArrayType() || T->isFunctionType()) && 2764219077Sdim (D.getName().getKind() != UnqualifiedId::IK_ConversionFunctionId)) { 2765219077Sdim unsigned diagID = diag::err_func_returning_array_function; 2766219077Sdim // Last processing chunk in block context means this function chunk 2767219077Sdim // represents the block. 2768219077Sdim if (chunkIndex == 0 && 2769219077Sdim D.getContext() == Declarator::BlockLiteralContext) 2770219077Sdim diagID = diag::err_block_returning_array_function; 2771224145Sdim S.Diag(DeclType.Loc, diagID) << T->isFunctionType() << T; 2772219077Sdim T = Context.IntTy; 2773219077Sdim D.setInvalidType(true); 2774219077Sdim } 2775219077Sdim 2776226633Sdim // Do not allow returning half FP value. 2777226633Sdim // FIXME: This really should be in BuildFunctionType. 2778226633Sdim if (T->isHalfType()) { 2779249423Sdim if (S.getLangOpts().OpenCL) { 2780249423Sdim if (!S.getOpenCLOptions().cl_khr_fp16) { 2781249423Sdim S.Diag(D.getIdentifierLoc(), diag::err_opencl_half_return) << T; 2782249423Sdim D.setInvalidType(true); 2783249423Sdim } 2784249423Sdim } else { 2785249423Sdim S.Diag(D.getIdentifierLoc(), 2786249423Sdim diag::err_parameters_retval_cannot_have_fp16_type) << 1; 2787249423Sdim D.setInvalidType(true); 2788249423Sdim } 2789226633Sdim } 2790226633Sdim 2791263508Sdim // Methods cannot return interface types. All ObjC objects are 2792263508Sdim // passed by reference. 2793263508Sdim if (T->isObjCObjectType()) { 2794263508Sdim SourceLocation DiagLoc, FixitLoc; 2795263508Sdim if (TInfo) { 2796263508Sdim DiagLoc = TInfo->getTypeLoc().getLocStart(); 2797263508Sdim FixitLoc = S.PP.getLocForEndOfToken(TInfo->getTypeLoc().getLocEnd()); 2798263508Sdim } else { 2799263508Sdim DiagLoc = D.getDeclSpec().getTypeSpecTypeLoc(); 2800263508Sdim FixitLoc = S.PP.getLocForEndOfToken(D.getDeclSpec().getLocEnd()); 2801263508Sdim } 2802263508Sdim S.Diag(DiagLoc, diag::err_object_cannot_be_passed_returned_by_value) 2803263508Sdim << 0 << T 2804263508Sdim << FixItHint::CreateInsertion(FixitLoc, "*"); 2805263508Sdim 2806263508Sdim T = Context.getObjCObjectPointerType(T); 2807263508Sdim if (TInfo) { 2808263508Sdim TypeLocBuilder TLB; 2809263508Sdim TLB.pushFullCopy(TInfo->getTypeLoc()); 2810263508Sdim ObjCObjectPointerTypeLoc TLoc = TLB.push<ObjCObjectPointerTypeLoc>(T); 2811263508Sdim TLoc.setStarLoc(FixitLoc); 2812263508Sdim TInfo = TLB.getTypeSourceInfo(Context, T); 2813263508Sdim } 2814263508Sdim 2815263508Sdim D.setInvalidType(true); 2816263508Sdim } 2817263508Sdim 2818210299Sed // cv-qualifiers on return types are pointless except when the type is a 2819210299Sed // class type in C++. 2820249423Sdim if ((T.getCVRQualifiers() || T->isAtomicType()) && 2821249423Sdim !(S.getLangOpts().CPlusPlus && 2822249423Sdim (T->isDependentType() || T->isRecordType()))) 2823249423Sdim diagnoseIgnoredFunctionQualifiers(S, T, D, chunkIndex); 2824219077Sdim 2825249423Sdim // Objective-C ARC ownership qualifiers are ignored on the function 2826249423Sdim // return type (by type canonicalization). Complain if this attribute 2827249423Sdim // was written here. 2828249423Sdim if (T.getQualifiers().hasObjCLifetime()) { 2829249423Sdim SourceLocation AttrLoc; 2830249423Sdim if (chunkIndex + 1 < D.getNumTypeObjects()) { 2831249423Sdim DeclaratorChunk ReturnTypeChunk = D.getTypeObject(chunkIndex + 1); 2832249423Sdim for (const AttributeList *Attr = ReturnTypeChunk.getAttrs(); 2833249423Sdim Attr; Attr = Attr->getNext()) { 2834249423Sdim if (Attr->getKind() == AttributeList::AT_ObjCOwnership) { 2835249423Sdim AttrLoc = Attr->getLoc(); 2836249423Sdim break; 2837249423Sdim } 2838249423Sdim } 2839249423Sdim } 2840249423Sdim if (AttrLoc.isInvalid()) { 2841249423Sdim for (const AttributeList *Attr 2842249423Sdim = D.getDeclSpec().getAttributes().getList(); 2843249423Sdim Attr; Attr = Attr->getNext()) { 2844249423Sdim if (Attr->getKind() == AttributeList::AT_ObjCOwnership) { 2845249423Sdim AttrLoc = Attr->getLoc(); 2846249423Sdim break; 2847249423Sdim } 2848249423Sdim } 2849249423Sdim } 2850219077Sdim 2851249423Sdim if (AttrLoc.isValid()) { 2852249423Sdim // The ownership attributes are almost always written via 2853249423Sdim // the predefined 2854249423Sdim // __strong/__weak/__autoreleasing/__unsafe_unretained. 2855249423Sdim if (AttrLoc.isMacroID()) 2856249423Sdim AttrLoc = S.SourceMgr.getImmediateExpansionRange(AttrLoc).first; 2857219077Sdim 2858249423Sdim S.Diag(AttrLoc, diag::warn_arc_lifetime_result_type) 2859249423Sdim << T.getQualifiers().getObjCLifetime(); 2860249423Sdim } 2861210299Sed } 2862219077Sdim 2863263508Sdim if (LangOpts.CPlusPlus && D.getDeclSpec().hasTagDefinition()) { 2864193326Sed // C++ [dcl.fct]p6: 2865193326Sed // Types shall not be defined in return or parameter types. 2866212904Sdim TagDecl *Tag = cast<TagDecl>(D.getDeclSpec().getRepAsDecl()); 2867263508Sdim S.Diag(Tag->getLocation(), diag::err_type_defined_in_result_type) 2868263508Sdim << Context.getTypeDeclType(Tag); 2869193326Sed } 2870193326Sed 2871193326Sed // Exception specs are not allowed in typedefs. Complain, but add it 2872193326Sed // anyway. 2873221345Sdim if (IsTypedefName && FTI.getExceptionSpecType()) 2874224145Sdim S.Diag(FTI.getExceptionSpecLoc(), diag::err_exception_spec_in_typedef) 2875223017Sdim << (D.getContext() == Declarator::AliasDeclContext || 2876223017Sdim D.getContext() == Declarator::AliasTemplateContext); 2877193326Sed 2878239462Sdim // If we see "T var();" or "T var(T());" at block scope, it is probably 2879239462Sdim // an attempt to initialize a variable, not a function declaration. 2880239462Sdim if (FTI.isAmbiguous) 2881239462Sdim warnAboutAmbiguousFunction(S, D, DeclType, T); 2882239462Sdim 2883263508Sdim FunctionType::ExtInfo EI(getCCForDeclaratorChunk(S, D, FTI, chunkIndex)); 2884263508Sdim 2885224145Sdim if (!FTI.NumArgs && !FTI.isVariadic && !LangOpts.CPlusPlus) { 2886210299Sed // Simple void foo(), where the incoming T is the result type. 2887263508Sdim T = Context.getFunctionNoProtoType(T, EI); 2888210299Sed } else { 2889210299Sed // We allow a zero-parameter variadic function in C if the 2890210299Sed // function is marked with the "overloadable" attribute. Scan 2891210299Sed // for this attribute now. 2892224145Sdim if (!FTI.NumArgs && FTI.isVariadic && !LangOpts.CPlusPlus) { 2893193326Sed bool Overloadable = false; 2894193326Sed for (const AttributeList *Attrs = D.getAttributes(); 2895193326Sed Attrs; Attrs = Attrs->getNext()) { 2896239462Sdim if (Attrs->getKind() == AttributeList::AT_Overloadable) { 2897193326Sed Overloadable = true; 2898193326Sed break; 2899193326Sed } 2900193326Sed } 2901193326Sed 2902193326Sed if (!Overloadable) 2903224145Sdim S.Diag(FTI.getEllipsisLoc(), diag::err_ellipsis_first_arg); 2904193326Sed } 2905210299Sed 2906210299Sed if (FTI.NumArgs && FTI.ArgInfo[0].Param == 0) { 2907210299Sed // C99 6.7.5.3p3: Reject int(x,y,z) when it's not a function 2908210299Sed // definition. 2909224145Sdim S.Diag(FTI.ArgInfo[0].IdentLoc, diag::err_ident_list_in_fn_declaration); 2910210299Sed D.setInvalidType(true); 2911249423Sdim // Recover by creating a K&R-style function type. 2912263508Sdim T = Context.getFunctionNoProtoType(T, EI); 2913210299Sed break; 2914210299Sed } 2915210299Sed 2916218893Sdim FunctionProtoType::ExtProtoInfo EPI; 2917263508Sdim EPI.ExtInfo = EI; 2918218893Sdim EPI.Variadic = FTI.isVariadic; 2919239462Sdim EPI.HasTrailingReturn = FTI.hasTrailingReturnType(); 2920218893Sdim EPI.TypeQuals = FTI.TypeQuals; 2921218893Sdim EPI.RefQualifier = !FTI.hasRefQualifier()? RQ_None 2922218893Sdim : FTI.RefQualifierIsLValueRef? RQ_LValue 2923218893Sdim : RQ_RValue; 2924239462Sdim 2925193326Sed // Otherwise, we have a function with an argument list that is 2926193326Sed // potentially variadic. 2927226633Sdim SmallVector<QualType, 16> ArgTys; 2928210299Sed ArgTys.reserve(FTI.NumArgs); 2929198092Srdivacky 2930226633Sdim SmallVector<bool, 16> ConsumedArguments; 2931224145Sdim ConsumedArguments.reserve(FTI.NumArgs); 2932224145Sdim bool HasAnyConsumedArguments = false; 2933224145Sdim 2934193326Sed for (unsigned i = 0, e = FTI.NumArgs; i != e; ++i) { 2935212904Sdim ParmVarDecl *Param = cast<ParmVarDecl>(FTI.ArgInfo[i].Param); 2936193326Sed QualType ArgTy = Param->getType(); 2937193326Sed assert(!ArgTy.isNull() && "Couldn't parse type?"); 2938193326Sed 2939193326Sed // Look for 'void'. void is allowed only as a single argument to a 2940193326Sed // function with no other parameters (C99 6.7.5.3p10). We record 2941193326Sed // int(void) as a FunctionProtoType with an empty argument list. 2942193326Sed if (ArgTy->isVoidType()) { 2943193326Sed // If this is something like 'float(int, void)', reject it. 'void' 2944193326Sed // is an incomplete type (C99 6.2.5p19) and function decls cannot 2945193326Sed // have arguments of incomplete type. 2946193326Sed if (FTI.NumArgs != 1 || FTI.isVariadic) { 2947224145Sdim S.Diag(DeclType.Loc, diag::err_void_only_param); 2948193326Sed ArgTy = Context.IntTy; 2949193326Sed Param->setType(ArgTy); 2950193326Sed } else if (FTI.ArgInfo[i].Ident) { 2951193326Sed // Reject, but continue to parse 'int(void abc)'. 2952224145Sdim S.Diag(FTI.ArgInfo[i].IdentLoc, 2953193326Sed diag::err_param_with_void_type); 2954193326Sed ArgTy = Context.IntTy; 2955193326Sed Param->setType(ArgTy); 2956193326Sed } else { 2957193326Sed // Reject, but continue to parse 'float(const void)'. 2958198092Srdivacky if (ArgTy.hasQualifiers()) 2959224145Sdim S.Diag(DeclType.Loc, diag::err_void_param_qualified); 2960198092Srdivacky 2961193326Sed // Do not add 'void' to the ArgTys list. 2962193326Sed break; 2963193326Sed } 2964226633Sdim } else if (ArgTy->isHalfType()) { 2965226633Sdim // Disallow half FP arguments. 2966226633Sdim // FIXME: This really should be in BuildFunctionType. 2967249423Sdim if (S.getLangOpts().OpenCL) { 2968249423Sdim if (!S.getOpenCLOptions().cl_khr_fp16) { 2969249423Sdim S.Diag(Param->getLocation(), 2970249423Sdim diag::err_opencl_half_argument) << ArgTy; 2971249423Sdim D.setInvalidType(); 2972249423Sdim Param->setInvalidDecl(); 2973249423Sdim } 2974249423Sdim } else { 2975249423Sdim S.Diag(Param->getLocation(), 2976249423Sdim diag::err_parameters_retval_cannot_have_fp16_type) << 0; 2977249423Sdim D.setInvalidType(); 2978249423Sdim } 2979193326Sed } else if (!FTI.hasPrototype) { 2980193326Sed if (ArgTy->isPromotableIntegerType()) { 2981198092Srdivacky ArgTy = Context.getPromotedIntegerType(ArgTy); 2982221345Sdim Param->setKNRPromoted(true); 2983198092Srdivacky } else if (const BuiltinType* BTy = ArgTy->getAs<BuiltinType>()) { 2984221345Sdim if (BTy->getKind() == BuiltinType::Float) { 2985193326Sed ArgTy = Context.DoubleTy; 2986221345Sdim Param->setKNRPromoted(true); 2987221345Sdim } 2988193326Sed } 2989193326Sed } 2990198092Srdivacky 2991224145Sdim if (LangOpts.ObjCAutoRefCount) { 2992224145Sdim bool Consumed = Param->hasAttr<NSConsumedAttr>(); 2993224145Sdim ConsumedArguments.push_back(Consumed); 2994224145Sdim HasAnyConsumedArguments |= Consumed; 2995224145Sdim } 2996224145Sdim 2997198398Srdivacky ArgTys.push_back(ArgTy); 2998193326Sed } 2999193326Sed 3000224145Sdim if (HasAnyConsumedArguments) 3001224145Sdim EPI.ConsumedArguments = ConsumedArguments.data(); 3002224145Sdim 3003226633Sdim SmallVector<QualType, 4> Exceptions; 3004234982Sdim SmallVector<ParsedType, 2> DynamicExceptions; 3005234982Sdim SmallVector<SourceRange, 2> DynamicExceptionRanges; 3006234982Sdim Expr *NoexceptExpr = 0; 3007239462Sdim 3008221345Sdim if (FTI.getExceptionSpecType() == EST_Dynamic) { 3009234982Sdim // FIXME: It's rather inefficient to have to split into two vectors 3010234982Sdim // here. 3011234982Sdim unsigned N = FTI.NumExceptions; 3012234982Sdim DynamicExceptions.reserve(N); 3013234982Sdim DynamicExceptionRanges.reserve(N); 3014234982Sdim for (unsigned I = 0; I != N; ++I) { 3015234982Sdim DynamicExceptions.push_back(FTI.Exceptions[I].Ty); 3016234982Sdim DynamicExceptionRanges.push_back(FTI.Exceptions[I].Range); 3017218893Sdim } 3018221345Sdim } else if (FTI.getExceptionSpecType() == EST_ComputedNoexcept) { 3019234982Sdim NoexceptExpr = FTI.NoexceptExpr; 3020234982Sdim } 3021239462Sdim 3022234982Sdim S.checkExceptionSpecification(FTI.getExceptionSpecType(), 3023234982Sdim DynamicExceptions, 3024234982Sdim DynamicExceptionRanges, 3025234982Sdim NoexceptExpr, 3026234982Sdim Exceptions, 3027234982Sdim EPI); 3028239462Sdim 3029249423Sdim T = Context.getFunctionType(T, ArgTys, EPI); 3030193326Sed } 3031203955Srdivacky 3032193326Sed break; 3033193326Sed } 3034193326Sed case DeclaratorChunk::MemberPointer: 3035193326Sed // The scope spec must refer to a class, or be dependent. 3036212904Sdim CXXScopeSpec &SS = DeclType.Mem.Scope(); 3037193326Sed QualType ClsType; 3038212904Sdim if (SS.isInvalid()) { 3039207619Srdivacky // Avoid emitting extra errors if we already errored on the scope. 3040207619Srdivacky D.setInvalidType(true); 3041224145Sdim } else if (S.isDependentScopeSpecifier(SS) || 3042224145Sdim dyn_cast_or_null<CXXRecordDecl>(S.computeDeclContext(SS))) { 3043198092Srdivacky NestedNameSpecifier *NNS 3044212904Sdim = static_cast<NestedNameSpecifier*>(SS.getScopeRep()); 3045198954Srdivacky NestedNameSpecifier *NNSPrefix = NNS->getPrefix(); 3046198954Srdivacky switch (NNS->getKind()) { 3047198954Srdivacky case NestedNameSpecifier::Identifier: 3048212904Sdim ClsType = Context.getDependentNameType(ETK_None, NNSPrefix, 3049206084Srdivacky NNS->getAsIdentifier()); 3050198954Srdivacky break; 3051198954Srdivacky 3052198954Srdivacky case NestedNameSpecifier::Namespace: 3053219077Sdim case NestedNameSpecifier::NamespaceAlias: 3054198954Srdivacky case NestedNameSpecifier::Global: 3055200583Srdivacky llvm_unreachable("Nested-name-specifier must name a type"); 3056212904Sdim 3057198954Srdivacky case NestedNameSpecifier::TypeSpec: 3058198954Srdivacky case NestedNameSpecifier::TypeSpecWithTemplate: 3059198954Srdivacky ClsType = QualType(NNS->getAsType(), 0); 3060221345Sdim // Note: if the NNS has a prefix and ClsType is a nondependent 3061221345Sdim // TemplateSpecializationType, then the NNS prefix is NOT included 3062221345Sdim // in ClsType; hence we wrap ClsType into an ElaboratedType. 3063221345Sdim // NOTE: in particular, no wrap occurs if ClsType already is an 3064221345Sdim // Elaborated, DependentName, or DependentTemplateSpecialization. 3065221345Sdim if (NNSPrefix && isa<TemplateSpecializationType>(NNS->getAsType())) 3066208600Srdivacky ClsType = Context.getElaboratedType(ETK_None, NNSPrefix, ClsType); 3067198954Srdivacky break; 3068198954Srdivacky } 3069193326Sed } else { 3070224145Sdim S.Diag(DeclType.Mem.Scope().getBeginLoc(), 3071194179Sed diag::err_illegal_decl_mempointer_in_nonclass) 3072194179Sed << (D.getIdentifier() ? D.getIdentifier()->getName() : "type name") 3073194179Sed << DeclType.Mem.Scope().getRange(); 3074193326Sed D.setInvalidType(true); 3075193326Sed } 3076193326Sed 3077194179Sed if (!ClsType.isNull()) 3078224145Sdim T = S.BuildMemberPointerType(T, ClsType, DeclType.Loc, D.getIdentifier()); 3079194179Sed if (T.isNull()) { 3080194179Sed T = Context.IntTy; 3081193326Sed D.setInvalidType(true); 3082210299Sed } else if (DeclType.Mem.TypeQuals) { 3083224145Sdim T = S.BuildQualifiedType(T, DeclType.Loc, DeclType.Mem.TypeQuals); 3084193326Sed } 3085193326Sed break; 3086193326Sed } 3087193326Sed 3088193326Sed if (T.isNull()) { 3089193326Sed D.setInvalidType(true); 3090193326Sed T = Context.IntTy; 3091193326Sed } 3092193326Sed 3093193326Sed // See if there are any attributes on this declarator chunk. 3094218893Sdim if (AttributeList *attrs = const_cast<AttributeList*>(DeclType.getAttrs())) 3095249423Sdim processTypeAttrs(state, T, TAL_DeclChunk, attrs); 3096193326Sed } 3097193326Sed 3098224145Sdim if (LangOpts.CPlusPlus && T->isFunctionType()) { 3099198092Srdivacky const FunctionProtoType *FnTy = T->getAs<FunctionProtoType>(); 3100198893Srdivacky assert(FnTy && "Why oh why is there not a FunctionProtoType here?"); 3101193326Sed 3102239462Sdim // C++ 8.3.5p4: 3103218893Sdim // A cv-qualifier-seq shall only be part of the function type 3104218893Sdim // for a nonstatic member function, the function type to which a pointer 3105218893Sdim // to member refers, or the top-level function type of a function typedef 3106218893Sdim // declaration. 3107218893Sdim // 3108218893Sdim // Core issue 547 also allows cv-qualifiers on function types that are 3109218893Sdim // top-level template type arguments. 3110218893Sdim bool FreeFunction; 3111218893Sdim if (!D.getCXXScopeSpec().isSet()) { 3112234353Sdim FreeFunction = ((D.getContext() != Declarator::MemberContext && 3113234353Sdim D.getContext() != Declarator::LambdaExprContext) || 3114218893Sdim D.getDeclSpec().isFriendSpecified()); 3115218893Sdim } else { 3116224145Sdim DeclContext *DC = S.computeDeclContext(D.getCXXScopeSpec()); 3117218893Sdim FreeFunction = (DC && !DC->isRecord()); 3118218893Sdim } 3119218893Sdim 3120234353Sdim // C++11 [dcl.fct]p6 (w/DR1417): 3121234353Sdim // An attempt to specify a function type with a cv-qualifier-seq or a 3122234353Sdim // ref-qualifier (including by typedef-name) is ill-formed unless it is: 3123234353Sdim // - the function type for a non-static member function, 3124234353Sdim // - the function type to which a pointer to member refers, 3125234353Sdim // - the top-level function type of a function typedef declaration or 3126234353Sdim // alias-declaration, 3127234353Sdim // - the type-id in the default argument of a type-parameter, or 3128234353Sdim // - the type-id of a template-argument for a type-parameter 3129234353Sdim if (IsQualifiedFunction && 3130234353Sdim !(!FreeFunction && 3131234353Sdim D.getDeclSpec().getStorageClassSpec() != DeclSpec::SCS_static) && 3132234353Sdim !IsTypedefName && 3133234353Sdim D.getContext() != Declarator::TemplateTypeArgContext) { 3134234353Sdim SourceLocation Loc = D.getLocStart(); 3135234353Sdim SourceRange RemovalRange; 3136234353Sdim unsigned I; 3137234353Sdim if (D.isFunctionDeclarator(I)) { 3138234353Sdim SmallVector<SourceLocation, 4> RemovalLocs; 3139234353Sdim const DeclaratorChunk &Chunk = D.getTypeObject(I); 3140234353Sdim assert(Chunk.Kind == DeclaratorChunk::Function); 3141234353Sdim if (Chunk.Fun.hasRefQualifier()) 3142234353Sdim RemovalLocs.push_back(Chunk.Fun.getRefQualifierLoc()); 3143234353Sdim if (Chunk.Fun.TypeQuals & Qualifiers::Const) 3144234353Sdim RemovalLocs.push_back(Chunk.Fun.getConstQualifierLoc()); 3145234353Sdim if (Chunk.Fun.TypeQuals & Qualifiers::Volatile) 3146234353Sdim RemovalLocs.push_back(Chunk.Fun.getVolatileQualifierLoc()); 3147234353Sdim // FIXME: We do not track the location of the __restrict qualifier. 3148234353Sdim //if (Chunk.Fun.TypeQuals & Qualifiers::Restrict) 3149234353Sdim // RemovalLocs.push_back(Chunk.Fun.getRestrictQualifierLoc()); 3150234353Sdim if (!RemovalLocs.empty()) { 3151234353Sdim std::sort(RemovalLocs.begin(), RemovalLocs.end(), 3152239462Sdim BeforeThanCompare<SourceLocation>(S.getSourceManager())); 3153234353Sdim RemovalRange = SourceRange(RemovalLocs.front(), RemovalLocs.back()); 3154234353Sdim Loc = RemovalLocs.front(); 3155218893Sdim } 3156234353Sdim } 3157193326Sed 3158234353Sdim S.Diag(Loc, diag::err_invalid_qualified_function_type) 3159234353Sdim << FreeFunction << D.isFunctionDeclarator() << T 3160234353Sdim << getFunctionQualifiersAsString(FnTy) 3161234353Sdim << FixItHint::CreateRemoval(RemovalRange); 3162234353Sdim 3163234353Sdim // Strip the cv-qualifiers and ref-qualifiers from the type. 3164234353Sdim FunctionProtoType::ExtProtoInfo EPI = FnTy->getExtProtoInfo(); 3165234353Sdim EPI.TypeQuals = 0; 3166234353Sdim EPI.RefQualifier = RQ_None; 3167234353Sdim 3168263508Sdim T = Context.getFunctionType(FnTy->getResultType(), FnTy->getArgTypes(), 3169249423Sdim EPI); 3170243830Sdim // Rebuild any parens around the identifier in the function type. 3171243830Sdim for (unsigned i = 0, e = D.getNumTypeObjects(); i != e; ++i) { 3172243830Sdim if (D.getTypeObject(i).Kind != DeclaratorChunk::Paren) 3173243830Sdim break; 3174243830Sdim T = S.BuildParenType(T); 3175243830Sdim } 3176193326Sed } 3177193326Sed } 3178198092Srdivacky 3179218893Sdim // Apply any undistributed attributes from the declarator. 3180218893Sdim if (!T.isNull()) 3181218893Sdim if (AttributeList *attrs = D.getAttributes()) 3182249423Sdim processTypeAttrs(state, T, TAL_DeclName, attrs); 3183218893Sdim 3184218893Sdim // Diagnose any ignored type attributes. 3185218893Sdim if (!T.isNull()) state.diagnoseIgnoredTypeAttrs(T); 3186218893Sdim 3187221345Sdim // C++0x [dcl.constexpr]p9: 3188221345Sdim // A constexpr specifier used in an object declaration declares the object 3189239462Sdim // as const. 3190221345Sdim if (D.getDeclSpec().isConstexprSpecified() && T->isObjectType()) { 3191210299Sed T.addConst(); 3192210299Sed } 3193210299Sed 3194239462Sdim // If there was an ellipsis in the declarator, the declaration declares a 3195218893Sdim // parameter pack whose type may be a pack expansion type. 3196218893Sdim if (D.hasEllipsis() && !T.isNull()) { 3197218893Sdim // C++0x [dcl.fct]p13: 3198239462Sdim // A declarator-id or abstract-declarator containing an ellipsis shall 3199218893Sdim // only be used in a parameter-declaration. Such a parameter-declaration 3200218893Sdim // is a parameter pack (14.5.3). [...] 3201218893Sdim switch (D.getContext()) { 3202218893Sdim case Declarator::PrototypeContext: 3203263508Sdim case Declarator::LambdaExprParameterContext: 3204218893Sdim // C++0x [dcl.fct]p13: 3205239462Sdim // [...] When it is part of a parameter-declaration-clause, the 3206239462Sdim // parameter pack is a function parameter pack (14.5.3). The type T 3207218893Sdim // of the declarator-id of the function parameter pack shall contain 3208239462Sdim // a template parameter pack; each template parameter pack in T is 3209218893Sdim // expanded by the function parameter pack. 3210218893Sdim // 3211218893Sdim // We represent function parameter packs as function parameters whose 3212218893Sdim // type is a pack expansion. 3213218893Sdim if (!T->containsUnexpandedParameterPack()) { 3214239462Sdim S.Diag(D.getEllipsisLoc(), 3215218893Sdim diag::err_function_parameter_pack_without_parameter_packs) 3216218893Sdim << T << D.getSourceRange(); 3217218893Sdim D.setEllipsisLoc(SourceLocation()); 3218218893Sdim } else { 3219249423Sdim T = Context.getPackExpansionType(T, None); 3220218893Sdim } 3221218893Sdim break; 3222218893Sdim case Declarator::TemplateParamContext: 3223218893Sdim // C++0x [temp.param]p15: 3224239462Sdim // If a template-parameter is a [...] is a parameter-declaration that 3225218893Sdim // declares a parameter pack (8.3.5), then the template-parameter is a 3226218893Sdim // template parameter pack (14.5.3). 3227218893Sdim // 3228218893Sdim // Note: core issue 778 clarifies that, if there are any unexpanded 3229218893Sdim // parameter packs in the type of the non-type template parameter, then 3230218893Sdim // it expands those parameter packs. 3231218893Sdim if (T->containsUnexpandedParameterPack()) 3232249423Sdim T = Context.getPackExpansionType(T, None); 3233226633Sdim else 3234226633Sdim S.Diag(D.getEllipsisLoc(), 3235249423Sdim LangOpts.CPlusPlus11 3236226633Sdim ? diag::warn_cxx98_compat_variadic_templates 3237226633Sdim : diag::ext_variadic_templates); 3238218893Sdim break; 3239239462Sdim 3240218893Sdim case Declarator::FileContext: 3241218893Sdim case Declarator::KNRTypeListContext: 3242226633Sdim case Declarator::ObjCParameterContext: // FIXME: special diagnostic here? 3243226633Sdim case Declarator::ObjCResultContext: // FIXME: special diagnostic here? 3244218893Sdim case Declarator::TypeNameContext: 3245224145Sdim case Declarator::CXXNewContext: 3246221345Sdim case Declarator::AliasDeclContext: 3247223017Sdim case Declarator::AliasTemplateContext: 3248218893Sdim case Declarator::MemberContext: 3249218893Sdim case Declarator::BlockContext: 3250218893Sdim case Declarator::ForContext: 3251218893Sdim case Declarator::ConditionContext: 3252218893Sdim case Declarator::CXXCatchContext: 3253224145Sdim case Declarator::ObjCCatchContext: 3254218893Sdim case Declarator::BlockLiteralContext: 3255234353Sdim case Declarator::LambdaExprContext: 3256251662Sdim case Declarator::ConversionIdContext: 3257234353Sdim case Declarator::TrailingReturnContext: 3258218893Sdim case Declarator::TemplateTypeArgContext: 3259218893Sdim // FIXME: We may want to allow parameter packs in block-literal contexts 3260218893Sdim // in the future. 3261224145Sdim S.Diag(D.getEllipsisLoc(), diag::err_ellipsis_in_declarator_not_parameter); 3262218893Sdim D.setEllipsisLoc(SourceLocation()); 3263218893Sdim break; 3264218893Sdim } 3265218893Sdim } 3266219077Sdim 3267210299Sed if (T.isNull()) 3268210299Sed return Context.getNullTypeSourceInfo(); 3269210299Sed else if (D.isInvalidType()) 3270210299Sed return Context.getTrivialTypeSourceInfo(T); 3271224145Sdim 3272224145Sdim return S.GetTypeSourceInfoForDeclarator(D, T, TInfo); 3273193326Sed} 3274193326Sed 3275224145Sdim/// GetTypeForDeclarator - Convert the type for the specified 3276224145Sdim/// declarator to Type instances. 3277224145Sdim/// 3278224145Sdim/// The result of this call will never be null, but the associated 3279224145Sdim/// type may be a null type if there's an unrecoverable error. 3280224145SdimTypeSourceInfo *Sema::GetTypeForDeclarator(Declarator &D, Scope *S) { 3281224145Sdim // Determine the type of the declarator. Not all forms of declarator 3282224145Sdim // have a type. 3283224145Sdim 3284224145Sdim TypeProcessingState state(*this, D); 3285224145Sdim 3286224145Sdim TypeSourceInfo *ReturnTypeInfo = 0; 3287224145Sdim QualType T = GetDeclSpecTypeForDeclarator(state, ReturnTypeInfo); 3288224145Sdim if (T.isNull()) 3289224145Sdim return Context.getNullTypeSourceInfo(); 3290224145Sdim 3291234353Sdim if (D.isPrototypeContext() && getLangOpts().ObjCAutoRefCount) 3292224145Sdim inferARCWriteback(state, T); 3293239462Sdim 3294224145Sdim return GetFullTypeForDeclarator(state, T, ReturnTypeInfo); 3295224145Sdim} 3296224145Sdim 3297224145Sdimstatic void transferARCOwnershipToDeclSpec(Sema &S, 3298224145Sdim QualType &declSpecTy, 3299224145Sdim Qualifiers::ObjCLifetime ownership) { 3300224145Sdim if (declSpecTy->isObjCRetainableType() && 3301224145Sdim declSpecTy.getObjCLifetime() == Qualifiers::OCL_None) { 3302224145Sdim Qualifiers qs; 3303224145Sdim qs.addObjCLifetime(ownership); 3304224145Sdim declSpecTy = S.Context.getQualifiedType(declSpecTy, qs); 3305224145Sdim } 3306224145Sdim} 3307224145Sdim 3308224145Sdimstatic void transferARCOwnershipToDeclaratorChunk(TypeProcessingState &state, 3309224145Sdim Qualifiers::ObjCLifetime ownership, 3310224145Sdim unsigned chunkIndex) { 3311224145Sdim Sema &S = state.getSema(); 3312224145Sdim Declarator &D = state.getDeclarator(); 3313224145Sdim 3314224145Sdim // Look for an explicit lifetime attribute. 3315224145Sdim DeclaratorChunk &chunk = D.getTypeObject(chunkIndex); 3316224145Sdim for (const AttributeList *attr = chunk.getAttrs(); attr; 3317224145Sdim attr = attr->getNext()) 3318239462Sdim if (attr->getKind() == AttributeList::AT_ObjCOwnership) 3319224145Sdim return; 3320224145Sdim 3321224145Sdim const char *attrStr = 0; 3322224145Sdim switch (ownership) { 3323234353Sdim case Qualifiers::OCL_None: llvm_unreachable("no ownership!"); 3324224145Sdim case Qualifiers::OCL_ExplicitNone: attrStr = "none"; break; 3325224145Sdim case Qualifiers::OCL_Strong: attrStr = "strong"; break; 3326224145Sdim case Qualifiers::OCL_Weak: attrStr = "weak"; break; 3327224145Sdim case Qualifiers::OCL_Autoreleasing: attrStr = "autoreleasing"; break; 3328224145Sdim } 3329224145Sdim 3330263508Sdim IdentifierLoc *Arg = new (S.Context) IdentifierLoc; 3331263508Sdim Arg->Ident = &S.Context.Idents.get(attrStr); 3332263508Sdim Arg->Loc = SourceLocation(); 3333263508Sdim 3334263508Sdim ArgsUnion Args(Arg); 3335263508Sdim 3336224145Sdim // If there wasn't one, add one (with an invalid source location 3337224145Sdim // so that we don't make an AttributedType for it). 3338224145Sdim AttributeList *attr = D.getAttributePool() 3339224145Sdim .create(&S.Context.Idents.get("objc_ownership"), SourceLocation(), 3340224145Sdim /*scope*/ 0, SourceLocation(), 3341263508Sdim /*args*/ &Args, 1, AttributeList::AS_GNU); 3342224145Sdim spliceAttrIntoList(*attr, chunk.getAttrListRef()); 3343224145Sdim 3344224145Sdim // TODO: mark whether we did this inference? 3345224145Sdim} 3346224145Sdim 3347239462Sdim/// \brief Used for transferring ownership in casts resulting in l-values. 3348224145Sdimstatic void transferARCOwnership(TypeProcessingState &state, 3349224145Sdim QualType &declSpecTy, 3350224145Sdim Qualifiers::ObjCLifetime ownership) { 3351224145Sdim Sema &S = state.getSema(); 3352224145Sdim Declarator &D = state.getDeclarator(); 3353224145Sdim 3354224145Sdim int inner = -1; 3355234353Sdim bool hasIndirection = false; 3356224145Sdim for (unsigned i = 0, e = D.getNumTypeObjects(); i != e; ++i) { 3357224145Sdim DeclaratorChunk &chunk = D.getTypeObject(i); 3358224145Sdim switch (chunk.Kind) { 3359224145Sdim case DeclaratorChunk::Paren: 3360224145Sdim // Ignore parens. 3361224145Sdim break; 3362224145Sdim 3363224145Sdim case DeclaratorChunk::Array: 3364224145Sdim case DeclaratorChunk::Reference: 3365224145Sdim case DeclaratorChunk::Pointer: 3366234353Sdim if (inner != -1) 3367234353Sdim hasIndirection = true; 3368224145Sdim inner = i; 3369224145Sdim break; 3370224145Sdim 3371224145Sdim case DeclaratorChunk::BlockPointer: 3372234353Sdim if (inner != -1) 3373234353Sdim transferARCOwnershipToDeclaratorChunk(state, ownership, i); 3374234353Sdim return; 3375224145Sdim 3376224145Sdim case DeclaratorChunk::Function: 3377224145Sdim case DeclaratorChunk::MemberPointer: 3378224145Sdim return; 3379224145Sdim } 3380224145Sdim } 3381224145Sdim 3382224145Sdim if (inner == -1) 3383234353Sdim return; 3384224145Sdim 3385239462Sdim DeclaratorChunk &chunk = D.getTypeObject(inner); 3386224145Sdim if (chunk.Kind == DeclaratorChunk::Pointer) { 3387224145Sdim if (declSpecTy->isObjCRetainableType()) 3388224145Sdim return transferARCOwnershipToDeclSpec(S, declSpecTy, ownership); 3389234353Sdim if (declSpecTy->isObjCObjectType() && hasIndirection) 3390224145Sdim return transferARCOwnershipToDeclaratorChunk(state, ownership, inner); 3391224145Sdim } else { 3392224145Sdim assert(chunk.Kind == DeclaratorChunk::Array || 3393224145Sdim chunk.Kind == DeclaratorChunk::Reference); 3394224145Sdim return transferARCOwnershipToDeclSpec(S, declSpecTy, ownership); 3395224145Sdim } 3396224145Sdim} 3397224145Sdim 3398224145SdimTypeSourceInfo *Sema::GetTypeForDeclaratorCast(Declarator &D, QualType FromTy) { 3399224145Sdim TypeProcessingState state(*this, D); 3400224145Sdim 3401224145Sdim TypeSourceInfo *ReturnTypeInfo = 0; 3402224145Sdim QualType declSpecTy = GetDeclSpecTypeForDeclarator(state, ReturnTypeInfo); 3403224145Sdim if (declSpecTy.isNull()) 3404224145Sdim return Context.getNullTypeSourceInfo(); 3405224145Sdim 3406234353Sdim if (getLangOpts().ObjCAutoRefCount) { 3407224145Sdim Qualifiers::ObjCLifetime ownership = Context.getInnerObjCOwnership(FromTy); 3408224145Sdim if (ownership != Qualifiers::OCL_None) 3409224145Sdim transferARCOwnership(state, declSpecTy, ownership); 3410224145Sdim } 3411224145Sdim 3412224145Sdim return GetFullTypeForDeclarator(state, declSpecTy, ReturnTypeInfo); 3413224145Sdim} 3414224145Sdim 3415221345Sdim/// Map an AttributedType::Kind to an AttributeList::Kind. 3416221345Sdimstatic AttributeList::Kind getAttrListKind(AttributedType::Kind kind) { 3417221345Sdim switch (kind) { 3418221345Sdim case AttributedType::attr_address_space: 3419239462Sdim return AttributeList::AT_AddressSpace; 3420221345Sdim case AttributedType::attr_regparm: 3421239462Sdim return AttributeList::AT_Regparm; 3422221345Sdim case AttributedType::attr_vector_size: 3423239462Sdim return AttributeList::AT_VectorSize; 3424221345Sdim case AttributedType::attr_neon_vector_type: 3425239462Sdim return AttributeList::AT_NeonVectorType; 3426221345Sdim case AttributedType::attr_neon_polyvector_type: 3427239462Sdim return AttributeList::AT_NeonPolyVectorType; 3428221345Sdim case AttributedType::attr_objc_gc: 3429239462Sdim return AttributeList::AT_ObjCGC; 3430224145Sdim case AttributedType::attr_objc_ownership: 3431239462Sdim return AttributeList::AT_ObjCOwnership; 3432221345Sdim case AttributedType::attr_noreturn: 3433239462Sdim return AttributeList::AT_NoReturn; 3434221345Sdim case AttributedType::attr_cdecl: 3435239462Sdim return AttributeList::AT_CDecl; 3436221345Sdim case AttributedType::attr_fastcall: 3437239462Sdim return AttributeList::AT_FastCall; 3438221345Sdim case AttributedType::attr_stdcall: 3439239462Sdim return AttributeList::AT_StdCall; 3440221345Sdim case AttributedType::attr_thiscall: 3441239462Sdim return AttributeList::AT_ThisCall; 3442221345Sdim case AttributedType::attr_pascal: 3443239462Sdim return AttributeList::AT_Pascal; 3444221345Sdim case AttributedType::attr_pcs: 3445263508Sdim case AttributedType::attr_pcs_vfp: 3446239462Sdim return AttributeList::AT_Pcs; 3447243830Sdim case AttributedType::attr_pnaclcall: 3448243830Sdim return AttributeList::AT_PnaclCall; 3449249423Sdim case AttributedType::attr_inteloclbicc: 3450249423Sdim return AttributeList::AT_IntelOclBicc; 3451256030Sdim case AttributedType::attr_ms_abi: 3452256030Sdim return AttributeList::AT_MSABI; 3453256030Sdim case AttributedType::attr_sysv_abi: 3454256030Sdim return AttributeList::AT_SysVABI; 3455263508Sdim case AttributedType::attr_ptr32: 3456263508Sdim return AttributeList::AT_Ptr32; 3457263508Sdim case AttributedType::attr_ptr64: 3458263508Sdim return AttributeList::AT_Ptr64; 3459263508Sdim case AttributedType::attr_sptr: 3460263508Sdim return AttributeList::AT_SPtr; 3461263508Sdim case AttributedType::attr_uptr: 3462263508Sdim return AttributeList::AT_UPtr; 3463221345Sdim } 3464221345Sdim llvm_unreachable("unexpected attribute kind!"); 3465221345Sdim} 3466221345Sdim 3467221345Sdimstatic void fillAttributedTypeLoc(AttributedTypeLoc TL, 3468221345Sdim const AttributeList *attrs) { 3469221345Sdim AttributedType::Kind kind = TL.getAttrKind(); 3470221345Sdim 3471221345Sdim assert(attrs && "no type attributes in the expected location!"); 3472221345Sdim AttributeList::Kind parsedKind = getAttrListKind(kind); 3473221345Sdim while (attrs->getKind() != parsedKind) { 3474221345Sdim attrs = attrs->getNext(); 3475221345Sdim assert(attrs && "no matching attribute in expected location!"); 3476221345Sdim } 3477221345Sdim 3478221345Sdim TL.setAttrNameLoc(attrs->getLoc()); 3479263508Sdim if (TL.hasAttrExprOperand() && attrs->isArgExpr(0)) 3480263508Sdim TL.setAttrExprOperand(attrs->getArgAsExpr(0)); 3481263508Sdim else if (TL.hasAttrEnumOperand() && attrs->isArgIdent(0)) 3482263508Sdim TL.setAttrEnumOperandLoc(attrs->getArgAsIdent(0)->Loc); 3483221345Sdim 3484221345Sdim // FIXME: preserve this information to here. 3485221345Sdim if (TL.hasAttrOperand()) 3486221345Sdim TL.setAttrOperandParensRange(SourceRange()); 3487221345Sdim} 3488221345Sdim 3489198398Srdivackynamespace { 3490198398Srdivacky class TypeSpecLocFiller : public TypeLocVisitor<TypeSpecLocFiller> { 3491218893Sdim ASTContext &Context; 3492198398Srdivacky const DeclSpec &DS; 3493193326Sed 3494198398Srdivacky public: 3495239462Sdim TypeSpecLocFiller(ASTContext &Context, const DeclSpec &DS) 3496218893Sdim : Context(Context), DS(DS) {} 3497193326Sed 3498221345Sdim void VisitAttributedTypeLoc(AttributedTypeLoc TL) { 3499221345Sdim fillAttributedTypeLoc(TL, DS.getAttributes().getList()); 3500221345Sdim Visit(TL.getModifiedLoc()); 3501221345Sdim } 3502198398Srdivacky void VisitQualifiedTypeLoc(QualifiedTypeLoc TL) { 3503198398Srdivacky Visit(TL.getUnqualifiedLoc()); 3504198398Srdivacky } 3505198398Srdivacky void VisitTypedefTypeLoc(TypedefTypeLoc TL) { 3506198398Srdivacky TL.setNameLoc(DS.getTypeSpecTypeLoc()); 3507198398Srdivacky } 3508198398Srdivacky void VisitObjCInterfaceTypeLoc(ObjCInterfaceTypeLoc TL) { 3509198398Srdivacky TL.setNameLoc(DS.getTypeSpecTypeLoc()); 3510239462Sdim // FIXME. We should have DS.getTypeSpecTypeEndLoc(). But, it requires 3511239462Sdim // addition field. What we have is good enough for dispay of location 3512239462Sdim // of 'fixit' on interface name. 3513239462Sdim TL.setNameEndLoc(DS.getLocEnd()); 3514208600Srdivacky } 3515208600Srdivacky void VisitObjCObjectTypeLoc(ObjCObjectTypeLoc TL) { 3516208600Srdivacky // Handle the base type, which might not have been written explicitly. 3517208600Srdivacky if (DS.getTypeSpecType() == DeclSpec::TST_unspecified) { 3518208600Srdivacky TL.setHasBaseTypeAsWritten(false); 3519218893Sdim TL.getBaseLoc().initialize(Context, SourceLocation()); 3520208600Srdivacky } else { 3521208600Srdivacky TL.setHasBaseTypeAsWritten(true); 3522208600Srdivacky Visit(TL.getBaseLoc()); 3523208600Srdivacky } 3524193326Sed 3525208600Srdivacky // Protocol qualifiers. 3526198398Srdivacky if (DS.getProtocolQualifiers()) { 3527198398Srdivacky assert(TL.getNumProtocols() > 0); 3528198398Srdivacky assert(TL.getNumProtocols() == DS.getNumProtocolQualifiers()); 3529198398Srdivacky TL.setLAngleLoc(DS.getProtocolLAngleLoc()); 3530198398Srdivacky TL.setRAngleLoc(DS.getSourceRange().getEnd()); 3531198398Srdivacky for (unsigned i = 0, e = DS.getNumProtocolQualifiers(); i != e; ++i) 3532198398Srdivacky TL.setProtocolLoc(i, DS.getProtocolLocs()[i]); 3533198398Srdivacky } else { 3534198398Srdivacky assert(TL.getNumProtocols() == 0); 3535198398Srdivacky TL.setLAngleLoc(SourceLocation()); 3536198398Srdivacky TL.setRAngleLoc(SourceLocation()); 3537198398Srdivacky } 3538198398Srdivacky } 3539198398Srdivacky void VisitObjCObjectPointerTypeLoc(ObjCObjectPointerTypeLoc TL) { 3540198398Srdivacky TL.setStarLoc(SourceLocation()); 3541208600Srdivacky Visit(TL.getPointeeLoc()); 3542198092Srdivacky } 3543198893Srdivacky void VisitTemplateSpecializationTypeLoc(TemplateSpecializationTypeLoc TL) { 3544200583Srdivacky TypeSourceInfo *TInfo = 0; 3545212904Sdim Sema::GetTypeFromParser(DS.getRepAsType(), &TInfo); 3546198893Srdivacky 3547198893Srdivacky // If we got no declarator info from previous Sema routines, 3548198893Srdivacky // just fill with the typespec loc. 3549200583Srdivacky if (!TInfo) { 3550221345Sdim TL.initialize(Context, DS.getTypeSpecTypeNameLoc()); 3551198893Srdivacky return; 3552198893Srdivacky } 3553198893Srdivacky 3554208600Srdivacky TypeLoc OldTL = TInfo->getTypeLoc(); 3555208600Srdivacky if (TInfo->getType()->getAs<ElaboratedType>()) { 3556249423Sdim ElaboratedTypeLoc ElabTL = OldTL.castAs<ElaboratedTypeLoc>(); 3557249423Sdim TemplateSpecializationTypeLoc NamedTL = ElabTL.getNamedTypeLoc() 3558249423Sdim .castAs<TemplateSpecializationTypeLoc>(); 3559208600Srdivacky TL.copy(NamedTL); 3560263508Sdim } else { 3561263508Sdim TL.copy(OldTL.castAs<TemplateSpecializationTypeLoc>()); 3562263508Sdim assert(TL.getRAngleLoc() == OldTL.castAs<TemplateSpecializationTypeLoc>().getRAngleLoc()); 3563208600Srdivacky } 3564263508Sdim 3565198893Srdivacky } 3566202379Srdivacky void VisitTypeOfExprTypeLoc(TypeOfExprTypeLoc TL) { 3567202379Srdivacky assert(DS.getTypeSpecType() == DeclSpec::TST_typeofExpr); 3568202379Srdivacky TL.setTypeofLoc(DS.getTypeSpecTypeLoc()); 3569202379Srdivacky TL.setParensRange(DS.getTypeofParensRange()); 3570202379Srdivacky } 3571202379Srdivacky void VisitTypeOfTypeLoc(TypeOfTypeLoc TL) { 3572202379Srdivacky assert(DS.getTypeSpecType() == DeclSpec::TST_typeofType); 3573202379Srdivacky TL.setTypeofLoc(DS.getTypeSpecTypeLoc()); 3574202379Srdivacky TL.setParensRange(DS.getTypeofParensRange()); 3575212904Sdim assert(DS.getRepAsType()); 3576202379Srdivacky TypeSourceInfo *TInfo = 0; 3577212904Sdim Sema::GetTypeFromParser(DS.getRepAsType(), &TInfo); 3578202379Srdivacky TL.setUnderlyingTInfo(TInfo); 3579202379Srdivacky } 3580223017Sdim void VisitUnaryTransformTypeLoc(UnaryTransformTypeLoc TL) { 3581223017Sdim // FIXME: This holds only because we only have one unary transform. 3582223017Sdim assert(DS.getTypeSpecType() == DeclSpec::TST_underlyingType); 3583223017Sdim TL.setKWLoc(DS.getTypeSpecTypeLoc()); 3584223017Sdim TL.setParensRange(DS.getTypeofParensRange()); 3585223017Sdim assert(DS.getRepAsType()); 3586223017Sdim TypeSourceInfo *TInfo = 0; 3587223017Sdim Sema::GetTypeFromParser(DS.getRepAsType(), &TInfo); 3588223017Sdim TL.setUnderlyingTInfo(TInfo); 3589223017Sdim } 3590202879Srdivacky void VisitBuiltinTypeLoc(BuiltinTypeLoc TL) { 3591202879Srdivacky // By default, use the source location of the type specifier. 3592202879Srdivacky TL.setBuiltinLoc(DS.getTypeSpecTypeLoc()); 3593202879Srdivacky if (TL.needsExtraLocalData()) { 3594202879Srdivacky // Set info for the written builtin specifiers. 3595202879Srdivacky TL.getWrittenBuiltinSpecs() = DS.getWrittenBuiltinSpecs(); 3596202879Srdivacky // Try to have a meaningful source location. 3597202879Srdivacky if (TL.getWrittenSignSpec() != TSS_unspecified) 3598202879Srdivacky // Sign spec loc overrides the others (e.g., 'unsigned long'). 3599202879Srdivacky TL.setBuiltinLoc(DS.getTypeSpecSignLoc()); 3600202879Srdivacky else if (TL.getWrittenWidthSpec() != TSW_unspecified) 3601202879Srdivacky // Width spec loc overrides type spec loc (e.g., 'short int'). 3602202879Srdivacky TL.setBuiltinLoc(DS.getTypeSpecWidthLoc()); 3603202879Srdivacky } 3604202879Srdivacky } 3605208600Srdivacky void VisitElaboratedTypeLoc(ElaboratedTypeLoc TL) { 3606208600Srdivacky ElaboratedTypeKeyword Keyword 3607208600Srdivacky = TypeWithKeyword::getKeywordForTypeSpec(DS.getTypeSpecType()); 3608218893Sdim if (DS.getTypeSpecType() == TST_typename) { 3609208600Srdivacky TypeSourceInfo *TInfo = 0; 3610212904Sdim Sema::GetTypeFromParser(DS.getRepAsType(), &TInfo); 3611208600Srdivacky if (TInfo) { 3612249423Sdim TL.copy(TInfo->getTypeLoc().castAs<ElaboratedTypeLoc>()); 3613208600Srdivacky return; 3614208600Srdivacky } 3615208600Srdivacky } 3616234353Sdim TL.setElaboratedKeywordLoc(Keyword != ETK_None 3617234353Sdim ? DS.getTypeSpecTypeLoc() 3618234353Sdim : SourceLocation()); 3619208600Srdivacky const CXXScopeSpec& SS = DS.getTypeSpecScope(); 3620221345Sdim TL.setQualifierLoc(SS.getWithLocInContext(Context)); 3621208600Srdivacky Visit(TL.getNextTypeLoc().getUnqualifiedLoc()); 3622208600Srdivacky } 3623208600Srdivacky void VisitDependentNameTypeLoc(DependentNameTypeLoc TL) { 3624234353Sdim assert(DS.getTypeSpecType() == TST_typename); 3625234353Sdim TypeSourceInfo *TInfo = 0; 3626234353Sdim Sema::GetTypeFromParser(DS.getRepAsType(), &TInfo); 3627234353Sdim assert(TInfo); 3628249423Sdim TL.copy(TInfo->getTypeLoc().castAs<DependentNameTypeLoc>()); 3629208600Srdivacky } 3630210299Sed void VisitDependentTemplateSpecializationTypeLoc( 3631210299Sed DependentTemplateSpecializationTypeLoc TL) { 3632234353Sdim assert(DS.getTypeSpecType() == TST_typename); 3633234353Sdim TypeSourceInfo *TInfo = 0; 3634234353Sdim Sema::GetTypeFromParser(DS.getRepAsType(), &TInfo); 3635234353Sdim assert(TInfo); 3636249423Sdim TL.copy( 3637249423Sdim TInfo->getTypeLoc().castAs<DependentTemplateSpecializationTypeLoc>()); 3638210299Sed } 3639221345Sdim void VisitTagTypeLoc(TagTypeLoc TL) { 3640221345Sdim TL.setNameLoc(DS.getTypeSpecTypeNameLoc()); 3641221345Sdim } 3642226633Sdim void VisitAtomicTypeLoc(AtomicTypeLoc TL) { 3643249423Sdim // An AtomicTypeLoc can come from either an _Atomic(...) type specifier 3644249423Sdim // or an _Atomic qualifier. 3645249423Sdim if (DS.getTypeSpecType() == DeclSpec::TST_atomic) { 3646249423Sdim TL.setKWLoc(DS.getTypeSpecTypeLoc()); 3647249423Sdim TL.setParensRange(DS.getTypeofParensRange()); 3648239462Sdim 3649249423Sdim TypeSourceInfo *TInfo = 0; 3650249423Sdim Sema::GetTypeFromParser(DS.getRepAsType(), &TInfo); 3651249423Sdim assert(TInfo); 3652249423Sdim TL.getValueLoc().initializeFullCopy(TInfo->getTypeLoc()); 3653249423Sdim } else { 3654249423Sdim TL.setKWLoc(DS.getAtomicSpecLoc()); 3655249423Sdim // No parens, to indicate this was spelled as an _Atomic qualifier. 3656249423Sdim TL.setParensRange(SourceRange()); 3657249423Sdim Visit(TL.getValueLoc()); 3658249423Sdim } 3659226633Sdim } 3660208600Srdivacky 3661198398Srdivacky void VisitTypeLoc(TypeLoc TL) { 3662198398Srdivacky // FIXME: add other typespec types and change this to an assert. 3663218893Sdim TL.initialize(Context, DS.getTypeSpecTypeLoc()); 3664198092Srdivacky } 3665198398Srdivacky }; 3666198398Srdivacky 3667198398Srdivacky class DeclaratorLocFiller : public TypeLocVisitor<DeclaratorLocFiller> { 3668221345Sdim ASTContext &Context; 3669198398Srdivacky const DeclaratorChunk &Chunk; 3670198398Srdivacky 3671198398Srdivacky public: 3672221345Sdim DeclaratorLocFiller(ASTContext &Context, const DeclaratorChunk &Chunk) 3673221345Sdim : Context(Context), Chunk(Chunk) {} 3674198398Srdivacky 3675198398Srdivacky void VisitQualifiedTypeLoc(QualifiedTypeLoc TL) { 3676200583Srdivacky llvm_unreachable("qualified type locs not expected here!"); 3677198092Srdivacky } 3678263508Sdim void VisitDecayedTypeLoc(DecayedTypeLoc TL) { 3679263508Sdim llvm_unreachable("decayed type locs not expected here!"); 3680263508Sdim } 3681198398Srdivacky 3682224145Sdim void VisitAttributedTypeLoc(AttributedTypeLoc TL) { 3683224145Sdim fillAttributedTypeLoc(TL, Chunk.getAttrs()); 3684224145Sdim } 3685198398Srdivacky void VisitBlockPointerTypeLoc(BlockPointerTypeLoc TL) { 3686198398Srdivacky assert(Chunk.Kind == DeclaratorChunk::BlockPointer); 3687198398Srdivacky TL.setCaretLoc(Chunk.Loc); 3688198092Srdivacky } 3689198398Srdivacky void VisitPointerTypeLoc(PointerTypeLoc TL) { 3690198398Srdivacky assert(Chunk.Kind == DeclaratorChunk::Pointer); 3691198398Srdivacky TL.setStarLoc(Chunk.Loc); 3692198398Srdivacky } 3693198398Srdivacky void VisitObjCObjectPointerTypeLoc(ObjCObjectPointerTypeLoc TL) { 3694198398Srdivacky assert(Chunk.Kind == DeclaratorChunk::Pointer); 3695198398Srdivacky TL.setStarLoc(Chunk.Loc); 3696198398Srdivacky } 3697198398Srdivacky void VisitMemberPointerTypeLoc(MemberPointerTypeLoc TL) { 3698198398Srdivacky assert(Chunk.Kind == DeclaratorChunk::MemberPointer); 3699221345Sdim const CXXScopeSpec& SS = Chunk.Mem.Scope(); 3700221345Sdim NestedNameSpecifierLoc NNSLoc = SS.getWithLocInContext(Context); 3701221345Sdim 3702221345Sdim const Type* ClsTy = TL.getClass(); 3703221345Sdim QualType ClsQT = QualType(ClsTy, 0); 3704221345Sdim TypeSourceInfo *ClsTInfo = Context.CreateTypeSourceInfo(ClsQT, 0); 3705221345Sdim // Now copy source location info into the type loc component. 3706221345Sdim TypeLoc ClsTL = ClsTInfo->getTypeLoc(); 3707221345Sdim switch (NNSLoc.getNestedNameSpecifier()->getKind()) { 3708221345Sdim case NestedNameSpecifier::Identifier: 3709221345Sdim assert(isa<DependentNameType>(ClsTy) && "Unexpected TypeLoc"); 3710221345Sdim { 3711249423Sdim DependentNameTypeLoc DNTLoc = ClsTL.castAs<DependentNameTypeLoc>(); 3712234353Sdim DNTLoc.setElaboratedKeywordLoc(SourceLocation()); 3713221345Sdim DNTLoc.setQualifierLoc(NNSLoc.getPrefix()); 3714221345Sdim DNTLoc.setNameLoc(NNSLoc.getLocalBeginLoc()); 3715221345Sdim } 3716221345Sdim break; 3717221345Sdim 3718221345Sdim case NestedNameSpecifier::TypeSpec: 3719221345Sdim case NestedNameSpecifier::TypeSpecWithTemplate: 3720221345Sdim if (isa<ElaboratedType>(ClsTy)) { 3721249423Sdim ElaboratedTypeLoc ETLoc = ClsTL.castAs<ElaboratedTypeLoc>(); 3722234353Sdim ETLoc.setElaboratedKeywordLoc(SourceLocation()); 3723221345Sdim ETLoc.setQualifierLoc(NNSLoc.getPrefix()); 3724221345Sdim TypeLoc NamedTL = ETLoc.getNamedTypeLoc(); 3725221345Sdim NamedTL.initializeFullCopy(NNSLoc.getTypeLoc()); 3726221345Sdim } else { 3727221345Sdim ClsTL.initializeFullCopy(NNSLoc.getTypeLoc()); 3728221345Sdim } 3729221345Sdim break; 3730221345Sdim 3731221345Sdim case NestedNameSpecifier::Namespace: 3732221345Sdim case NestedNameSpecifier::NamespaceAlias: 3733221345Sdim case NestedNameSpecifier::Global: 3734221345Sdim llvm_unreachable("Nested-name-specifier must name a type"); 3735221345Sdim } 3736221345Sdim 3737221345Sdim // Finally fill in MemberPointerLocInfo fields. 3738198398Srdivacky TL.setStarLoc(Chunk.Loc); 3739221345Sdim TL.setClassTInfo(ClsTInfo); 3740198398Srdivacky } 3741198398Srdivacky void VisitLValueReferenceTypeLoc(LValueReferenceTypeLoc TL) { 3742198398Srdivacky assert(Chunk.Kind == DeclaratorChunk::Reference); 3743198398Srdivacky // 'Amp' is misleading: this might have been originally 3744198398Srdivacky /// spelled with AmpAmp. 3745198398Srdivacky TL.setAmpLoc(Chunk.Loc); 3746198398Srdivacky } 3747198398Srdivacky void VisitRValueReferenceTypeLoc(RValueReferenceTypeLoc TL) { 3748198398Srdivacky assert(Chunk.Kind == DeclaratorChunk::Reference); 3749198398Srdivacky assert(!Chunk.Ref.LValueRef); 3750198398Srdivacky TL.setAmpAmpLoc(Chunk.Loc); 3751198398Srdivacky } 3752198398Srdivacky void VisitArrayTypeLoc(ArrayTypeLoc TL) { 3753198398Srdivacky assert(Chunk.Kind == DeclaratorChunk::Array); 3754198398Srdivacky TL.setLBracketLoc(Chunk.Loc); 3755198398Srdivacky TL.setRBracketLoc(Chunk.EndLoc); 3756198398Srdivacky TL.setSizeExpr(static_cast<Expr*>(Chunk.Arr.NumElts)); 3757198398Srdivacky } 3758198398Srdivacky void VisitFunctionTypeLoc(FunctionTypeLoc TL) { 3759198398Srdivacky assert(Chunk.Kind == DeclaratorChunk::Function); 3760221345Sdim TL.setLocalRangeBegin(Chunk.Loc); 3761221345Sdim TL.setLocalRangeEnd(Chunk.EndLoc); 3762198398Srdivacky 3763198398Srdivacky const DeclaratorChunk::FunctionTypeInfo &FTI = Chunk.Fun; 3764243830Sdim TL.setLParenLoc(FTI.getLParenLoc()); 3765243830Sdim TL.setRParenLoc(FTI.getRParenLoc()); 3766198398Srdivacky for (unsigned i = 0, e = TL.getNumArgs(), tpi = 0; i != e; ++i) { 3767212904Sdim ParmVarDecl *Param = cast<ParmVarDecl>(FTI.ArgInfo[i].Param); 3768198398Srdivacky TL.setArg(tpi++, Param); 3769198092Srdivacky } 3770198398Srdivacky // FIXME: exception specs 3771198092Srdivacky } 3772218893Sdim void VisitParenTypeLoc(ParenTypeLoc TL) { 3773218893Sdim assert(Chunk.Kind == DeclaratorChunk::Paren); 3774218893Sdim TL.setLParenLoc(Chunk.Loc); 3775218893Sdim TL.setRParenLoc(Chunk.EndLoc); 3776218893Sdim } 3777193326Sed 3778198398Srdivacky void VisitTypeLoc(TypeLoc TL) { 3779200583Srdivacky llvm_unreachable("unsupported TypeLoc kind in declarator!"); 3780198092Srdivacky } 3781198398Srdivacky }; 3782198398Srdivacky} 3783198092Srdivacky 3784249423Sdimstatic void fillAtomicQualLoc(AtomicTypeLoc ATL, const DeclaratorChunk &Chunk) { 3785249423Sdim SourceLocation Loc; 3786249423Sdim switch (Chunk.Kind) { 3787249423Sdim case DeclaratorChunk::Function: 3788249423Sdim case DeclaratorChunk::Array: 3789249423Sdim case DeclaratorChunk::Paren: 3790249423Sdim llvm_unreachable("cannot be _Atomic qualified"); 3791249423Sdim 3792249423Sdim case DeclaratorChunk::Pointer: 3793249423Sdim Loc = SourceLocation::getFromRawEncoding(Chunk.Ptr.AtomicQualLoc); 3794249423Sdim break; 3795249423Sdim 3796249423Sdim case DeclaratorChunk::BlockPointer: 3797249423Sdim case DeclaratorChunk::Reference: 3798249423Sdim case DeclaratorChunk::MemberPointer: 3799249423Sdim // FIXME: Provide a source location for the _Atomic keyword. 3800249423Sdim break; 3801249423Sdim } 3802249423Sdim 3803249423Sdim ATL.setKWLoc(Loc); 3804249423Sdim ATL.setParensRange(SourceRange()); 3805249423Sdim} 3806249423Sdim 3807200583Srdivacky/// \brief Create and instantiate a TypeSourceInfo with type source information. 3808198398Srdivacky/// 3809198398Srdivacky/// \param T QualType referring to the type as written in source code. 3810207619Srdivacky/// 3811207619Srdivacky/// \param ReturnTypeInfo For declarators whose return type does not show 3812207619Srdivacky/// up in the normal place in the declaration specifiers (such as a C++ 3813207619Srdivacky/// conversion function), this pointer will refer to a type source information 3814207619Srdivacky/// for that return type. 3815200583SrdivackyTypeSourceInfo * 3816207619SrdivackySema::GetTypeSourceInfoForDeclarator(Declarator &D, QualType T, 3817207619Srdivacky TypeSourceInfo *ReturnTypeInfo) { 3818200583Srdivacky TypeSourceInfo *TInfo = Context.CreateTypeSourceInfo(T); 3819200583Srdivacky UnqualTypeLoc CurrTL = TInfo->getTypeLoc().getUnqualifiedLoc(); 3820198398Srdivacky 3821218893Sdim // Handle parameter packs whose type is a pack expansion. 3822218893Sdim if (isa<PackExpansionType>(T)) { 3823249423Sdim CurrTL.castAs<PackExpansionTypeLoc>().setEllipsisLoc(D.getEllipsisLoc()); 3824239462Sdim CurrTL = CurrTL.getNextTypeLoc().getUnqualifiedLoc(); 3825218893Sdim } 3826239462Sdim 3827198893Srdivacky for (unsigned i = 0, e = D.getNumTypeObjects(); i != e; ++i) { 3828249423Sdim // An AtomicTypeLoc might be produced by an atomic qualifier in this 3829249423Sdim // declarator chunk. 3830249423Sdim if (AtomicTypeLoc ATL = CurrTL.getAs<AtomicTypeLoc>()) { 3831249423Sdim fillAtomicQualLoc(ATL, D.getTypeObject(i)); 3832249423Sdim CurrTL = ATL.getValueLoc().getUnqualifiedLoc(); 3833249423Sdim } 3834249423Sdim 3835249423Sdim while (AttributedTypeLoc TL = CurrTL.getAs<AttributedTypeLoc>()) { 3836221345Sdim fillAttributedTypeLoc(TL, D.getTypeObject(i).getAttrs()); 3837221345Sdim CurrTL = TL.getNextTypeLoc().getUnqualifiedLoc(); 3838221345Sdim } 3839221345Sdim 3840221345Sdim DeclaratorLocFiller(Context, D.getTypeObject(i)).Visit(CurrTL); 3841198398Srdivacky CurrTL = CurrTL.getNextTypeLoc().getUnqualifiedLoc(); 3842195341Sed } 3843239462Sdim 3844212904Sdim // If we have different source information for the return type, use 3845212904Sdim // that. This really only applies to C++ conversion functions. 3846212904Sdim if (ReturnTypeInfo) { 3847207619Srdivacky TypeLoc TL = ReturnTypeInfo->getTypeLoc(); 3848207619Srdivacky assert(TL.getFullDataSize() == CurrTL.getFullDataSize()); 3849207619Srdivacky memcpy(CurrTL.getOpaqueData(), TL.getOpaqueData(), TL.getFullDataSize()); 3850212904Sdim } else { 3851218893Sdim TypeSpecLocFiller(Context, D.getDeclSpec()).Visit(CurrTL); 3852207619Srdivacky } 3853239462Sdim 3854200583Srdivacky return TInfo; 3855198092Srdivacky} 3856195341Sed 3857200583Srdivacky/// \brief Create a LocInfoType to hold the given QualType and TypeSourceInfo. 3858212904SdimParsedType Sema::CreateParsedType(QualType T, TypeSourceInfo *TInfo) { 3859198092Srdivacky // FIXME: LocInfoTypes are "transient", only needed for passing to/from Parser 3860198092Srdivacky // and Sema during declaration parsing. Try deallocating/caching them when 3861198092Srdivacky // it's appropriate, instead of allocating them and keeping them around. 3862239462Sdim LocInfoType *LocT = (LocInfoType*)BumpAlloc.Allocate(sizeof(LocInfoType), 3863218893Sdim TypeAlignment); 3864200583Srdivacky new (LocT) LocInfoType(T, TInfo); 3865198092Srdivacky assert(LocT->getTypeClass() != T->getTypeClass() && 3866198092Srdivacky "LocInfoType's TypeClass conflicts with an existing Type class"); 3867212904Sdim return ParsedType::make(QualType(LocT, 0)); 3868198092Srdivacky} 3869195341Sed 3870198092Srdivackyvoid LocInfoType::getAsStringInternal(std::string &Str, 3871198092Srdivacky const PrintingPolicy &Policy) const { 3872226633Sdim llvm_unreachable("LocInfoType leaked into the type system; an opaque TypeTy*" 3873198092Srdivacky " was used directly instead of getting the QualType through" 3874198092Srdivacky " GetTypeFromParser"); 3875195341Sed} 3876195341Sed 3877212904SdimTypeResult Sema::ActOnTypeName(Scope *S, Declarator &D) { 3878193326Sed // C99 6.7.6: Type names have no identifier. This is already validated by 3879193326Sed // the parser. 3880193326Sed assert(D.getIdentifier() == 0 && "Type name should have no identifier!"); 3881198092Srdivacky 3882224145Sdim TypeSourceInfo *TInfo = GetTypeForDeclarator(D, S); 3883210299Sed QualType T = TInfo->getType(); 3884193326Sed if (D.isInvalidType()) 3885193326Sed return true; 3886193326Sed 3887226633Sdim // Make sure there are no unused decl attributes on the declarator. 3888226633Sdim // We don't want to do this for ObjC parameters because we're going 3889226633Sdim // to apply them to the actual parameter declaration. 3890249423Sdim // Likewise, we don't want to do this for alias declarations, because 3891249423Sdim // we are actually going to build a declaration from this eventually. 3892249423Sdim if (D.getContext() != Declarator::ObjCParameterContext && 3893249423Sdim D.getContext() != Declarator::AliasDeclContext && 3894249423Sdim D.getContext() != Declarator::AliasTemplateContext) 3895226633Sdim checkUnusedDeclAttributes(D); 3896226633Sdim 3897234353Sdim if (getLangOpts().CPlusPlus) { 3898193326Sed // Check that there are no default arguments (C++ only). 3899193326Sed CheckExtraCXXDefaultArguments(D); 3900193326Sed } 3901193326Sed 3902212904Sdim return CreateParsedType(T, TInfo); 3903193326Sed} 3904193326Sed 3905226633SdimParsedType Sema::ActOnObjCInstanceType(SourceLocation Loc) { 3906226633Sdim QualType T = Context.getObjCInstanceType(); 3907226633Sdim TypeSourceInfo *TInfo = Context.getTrivialTypeSourceInfo(T, Loc); 3908226633Sdim return CreateParsedType(T, TInfo); 3909226633Sdim} 3910226633Sdim 3911226633Sdim 3912193326Sed//===----------------------------------------------------------------------===// 3913193326Sed// Type Attribute Processing 3914193326Sed//===----------------------------------------------------------------------===// 3915193326Sed 3916193326Sed/// HandleAddressSpaceTypeAttribute - Process an address_space attribute on the 3917193326Sed/// specified type. The attribute contains 1 argument, the id of the address 3918193326Sed/// space for the type. 3919198092Srdivackystatic void HandleAddressSpaceTypeAttribute(QualType &Type, 3920193326Sed const AttributeList &Attr, Sema &S){ 3921198092Srdivacky 3922193326Sed // If this type is already address space qualified, reject it. 3923226633Sdim // ISO/IEC TR 18037 S5.3 (amending C99 6.7.3): "No type shall be qualified by 3924226633Sdim // qualifiers for two or more different address spaces." 3925193326Sed if (Type.getAddressSpace()) { 3926193326Sed S.Diag(Attr.getLoc(), diag::err_attribute_address_multiple_qualifiers); 3927207619Srdivacky Attr.setInvalid(); 3928193326Sed return; 3929193326Sed } 3930198092Srdivacky 3931226633Sdim // ISO/IEC TR 18037 S5.3 (amending C99 6.7.3): "A function type shall not be 3932226633Sdim // qualified by an address-space qualifier." 3933226633Sdim if (Type->isFunctionType()) { 3934226633Sdim S.Diag(Attr.getLoc(), diag::err_attribute_address_function_type); 3935226633Sdim Attr.setInvalid(); 3936226633Sdim return; 3937226633Sdim } 3938226633Sdim 3939193326Sed // Check the attribute arguments. 3940193326Sed if (Attr.getNumArgs() != 1) { 3941263508Sdim S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments) 3942263508Sdim << Attr.getName() << 1; 3943207619Srdivacky Attr.setInvalid(); 3944193326Sed return; 3945193326Sed } 3946263508Sdim Expr *ASArgExpr = static_cast<Expr *>(Attr.getArgAsExpr(0)); 3947193326Sed llvm::APSInt addrSpace(32); 3948208600Srdivacky if (ASArgExpr->isTypeDependent() || ASArgExpr->isValueDependent() || 3949208600Srdivacky !ASArgExpr->isIntegerConstantExpr(addrSpace, S.Context)) { 3950263508Sdim S.Diag(Attr.getLoc(), diag::err_attribute_argument_type) 3951263508Sdim << Attr.getName() << AANT_ArgumentIntegerConstant 3952193326Sed << ASArgExpr->getSourceRange(); 3953207619Srdivacky Attr.setInvalid(); 3954193326Sed return; 3955193326Sed } 3956193326Sed 3957198092Srdivacky // Bounds checking. 3958198092Srdivacky if (addrSpace.isSigned()) { 3959198092Srdivacky if (addrSpace.isNegative()) { 3960198092Srdivacky S.Diag(Attr.getLoc(), diag::err_attribute_address_space_negative) 3961198092Srdivacky << ASArgExpr->getSourceRange(); 3962207619Srdivacky Attr.setInvalid(); 3963198092Srdivacky return; 3964198092Srdivacky } 3965198092Srdivacky addrSpace.setIsSigned(false); 3966198092Srdivacky } 3967198092Srdivacky llvm::APSInt max(addrSpace.getBitWidth()); 3968198092Srdivacky max = Qualifiers::MaxAddressSpace; 3969198092Srdivacky if (addrSpace > max) { 3970198092Srdivacky S.Diag(Attr.getLoc(), diag::err_attribute_address_space_too_high) 3971263508Sdim << int(Qualifiers::MaxAddressSpace) << ASArgExpr->getSourceRange(); 3972207619Srdivacky Attr.setInvalid(); 3973198092Srdivacky return; 3974198092Srdivacky } 3975198092Srdivacky 3976198092Srdivacky unsigned ASIdx = static_cast<unsigned>(addrSpace.getZExtValue()); 3977193326Sed Type = S.Context.getAddrSpaceQualType(Type, ASIdx); 3978193326Sed} 3979193326Sed 3980234353Sdim/// Does this type have a "direct" ownership qualifier? That is, 3981234353Sdim/// is it written like "__strong id", as opposed to something like 3982234353Sdim/// "typeof(foo)", where that happens to be strong? 3983234353Sdimstatic bool hasDirectOwnershipQualifier(QualType type) { 3984234353Sdim // Fast path: no qualifier at all. 3985234353Sdim assert(type.getQualifiers().hasObjCLifetime()); 3986234353Sdim 3987234353Sdim while (true) { 3988234353Sdim // __strong id 3989234353Sdim if (const AttributedType *attr = dyn_cast<AttributedType>(type)) { 3990234353Sdim if (attr->getAttrKind() == AttributedType::attr_objc_ownership) 3991234353Sdim return true; 3992234353Sdim 3993234353Sdim type = attr->getModifiedType(); 3994234353Sdim 3995234353Sdim // X *__strong (...) 3996234353Sdim } else if (const ParenType *paren = dyn_cast<ParenType>(type)) { 3997234353Sdim type = paren->getInnerType(); 3998239462Sdim 3999234353Sdim // That's it for things we want to complain about. In particular, 4000234353Sdim // we do not want to look through typedefs, typeof(expr), 4001234353Sdim // typeof(type), or any other way that the type is somehow 4002234353Sdim // abstracted. 4003234353Sdim } else { 4004239462Sdim 4005234353Sdim return false; 4006234353Sdim } 4007234353Sdim } 4008234353Sdim} 4009234353Sdim 4010224145Sdim/// handleObjCOwnershipTypeAttr - Process an objc_ownership 4011224145Sdim/// attribute on the specified type. 4012224145Sdim/// 4013224145Sdim/// Returns 'true' if the attribute was handled. 4014224145Sdimstatic bool handleObjCOwnershipTypeAttr(TypeProcessingState &state, 4015224145Sdim AttributeList &attr, 4016224145Sdim QualType &type) { 4017234353Sdim bool NonObjCPointer = false; 4018224145Sdim 4019251662Sdim if (!type->isDependentType() && !type->isUndeducedType()) { 4020234353Sdim if (const PointerType *ptr = type->getAs<PointerType>()) { 4021234353Sdim QualType pointee = ptr->getPointeeType(); 4022234353Sdim if (pointee->isObjCRetainableType() || pointee->isPointerType()) 4023234353Sdim return false; 4024234353Sdim // It is important not to lose the source info that there was an attribute 4025234353Sdim // applied to non-objc pointer. We will create an attributed type but 4026234353Sdim // its type will be the same as the original type. 4027234353Sdim NonObjCPointer = true; 4028234353Sdim } else if (!type->isObjCRetainableType()) { 4029234353Sdim return false; 4030234353Sdim } 4031249423Sdim 4032249423Sdim // Don't accept an ownership attribute in the declspec if it would 4033249423Sdim // just be the return type of a block pointer. 4034249423Sdim if (state.isProcessingDeclSpec()) { 4035249423Sdim Declarator &D = state.getDeclarator(); 4036249423Sdim if (maybeMovePastReturnType(D, D.getNumTypeObjects())) 4037249423Sdim return false; 4038249423Sdim } 4039234353Sdim } 4040234353Sdim 4041224145Sdim Sema &S = state.getSema(); 4042226633Sdim SourceLocation AttrLoc = attr.getLoc(); 4043226633Sdim if (AttrLoc.isMacroID()) 4044226633Sdim AttrLoc = S.getSourceManager().getImmediateExpansionRange(AttrLoc).first; 4045224145Sdim 4046263508Sdim if (!attr.isArgIdent(0)) { 4047263508Sdim S.Diag(AttrLoc, diag::err_attribute_argument_type) 4048263508Sdim << attr.getName() << AANT_ArgumentString; 4049224145Sdim attr.setInvalid(); 4050224145Sdim return true; 4051224145Sdim } 4052224145Sdim 4053234353Sdim // Consume lifetime attributes without further comment outside of 4054234353Sdim // ARC mode. 4055234353Sdim if (!S.getLangOpts().ObjCAutoRefCount) 4056234353Sdim return true; 4057234353Sdim 4058263508Sdim IdentifierInfo *II = attr.getArgAsIdent(0)->Ident; 4059224145Sdim Qualifiers::ObjCLifetime lifetime; 4060263508Sdim if (II->isStr("none")) 4061224145Sdim lifetime = Qualifiers::OCL_ExplicitNone; 4062263508Sdim else if (II->isStr("strong")) 4063224145Sdim lifetime = Qualifiers::OCL_Strong; 4064263508Sdim else if (II->isStr("weak")) 4065224145Sdim lifetime = Qualifiers::OCL_Weak; 4066263508Sdim else if (II->isStr("autoreleasing")) 4067224145Sdim lifetime = Qualifiers::OCL_Autoreleasing; 4068224145Sdim else { 4069226633Sdim S.Diag(AttrLoc, diag::warn_attribute_type_not_supported) 4070263508Sdim << attr.getName() << II; 4071224145Sdim attr.setInvalid(); 4072224145Sdim return true; 4073224145Sdim } 4074224145Sdim 4075234353Sdim SplitQualType underlyingType = type.split(); 4076224145Sdim 4077234353Sdim // Check for redundant/conflicting ownership qualifiers. 4078234353Sdim if (Qualifiers::ObjCLifetime previousLifetime 4079234353Sdim = type.getQualifiers().getObjCLifetime()) { 4080234353Sdim // If it's written directly, that's an error. 4081234353Sdim if (hasDirectOwnershipQualifier(type)) { 4082234353Sdim S.Diag(AttrLoc, diag::err_attr_objc_ownership_redundant) 4083234353Sdim << type; 4084234353Sdim return true; 4085234353Sdim } 4086234353Sdim 4087234353Sdim // Otherwise, if the qualifiers actually conflict, pull sugar off 4088234353Sdim // until we reach a type that is directly qualified. 4089234353Sdim if (previousLifetime != lifetime) { 4090234353Sdim // This should always terminate: the canonical type is 4091234353Sdim // qualified, so some bit of sugar must be hiding it. 4092234353Sdim while (!underlyingType.Quals.hasObjCLifetime()) { 4093234353Sdim underlyingType = underlyingType.getSingleStepDesugaredType(); 4094234353Sdim } 4095234353Sdim underlyingType.Quals.removeObjCLifetime(); 4096234353Sdim } 4097234353Sdim } 4098234353Sdim 4099234353Sdim underlyingType.Quals.addObjCLifetime(lifetime); 4100234353Sdim 4101234353Sdim if (NonObjCPointer) { 4102234353Sdim StringRef name = attr.getName()->getName(); 4103234353Sdim switch (lifetime) { 4104234353Sdim case Qualifiers::OCL_None: 4105234353Sdim case Qualifiers::OCL_ExplicitNone: 4106234353Sdim break; 4107234353Sdim case Qualifiers::OCL_Strong: name = "__strong"; break; 4108234353Sdim case Qualifiers::OCL_Weak: name = "__weak"; break; 4109234353Sdim case Qualifiers::OCL_Autoreleasing: name = "__autoreleasing"; break; 4110234353Sdim } 4111263508Sdim S.Diag(AttrLoc, diag::warn_type_attribute_wrong_type) << name 4112263508Sdim << TDS_ObjCObjOrBlock << type; 4113234353Sdim } 4114234353Sdim 4115224145Sdim QualType origType = type; 4116234353Sdim if (!NonObjCPointer) 4117234353Sdim type = S.Context.getQualifiedType(underlyingType); 4118224145Sdim 4119224145Sdim // If we have a valid source location for the attribute, use an 4120224145Sdim // AttributedType instead. 4121226633Sdim if (AttrLoc.isValid()) 4122224145Sdim type = S.Context.getAttributedType(AttributedType::attr_objc_ownership, 4123224145Sdim origType, type); 4124224145Sdim 4125224145Sdim // Forbid __weak if the runtime doesn't support it. 4126224145Sdim if (lifetime == Qualifiers::OCL_Weak && 4127243830Sdim !S.getLangOpts().ObjCARCWeak && !NonObjCPointer) { 4128224145Sdim 4129224145Sdim // Actually, delay this until we know what we're parsing. 4130224145Sdim if (S.DelayedDiagnostics.shouldDelayDiagnostics()) { 4131224145Sdim S.DelayedDiagnostics.add( 4132226633Sdim sema::DelayedDiagnostic::makeForbiddenType( 4133226633Sdim S.getSourceManager().getExpansionLoc(AttrLoc), 4134224145Sdim diag::err_arc_weak_no_runtime, type, /*ignored*/ 0)); 4135224145Sdim } else { 4136226633Sdim S.Diag(AttrLoc, diag::err_arc_weak_no_runtime); 4137224145Sdim } 4138224145Sdim 4139224145Sdim attr.setInvalid(); 4140224145Sdim return true; 4141224145Sdim } 4142239462Sdim 4143239462Sdim // Forbid __weak for class objects marked as 4144224145Sdim // objc_arc_weak_reference_unavailable 4145224145Sdim if (lifetime == Qualifiers::OCL_Weak) { 4146249423Sdim if (const ObjCObjectPointerType *ObjT = 4147249423Sdim type->getAs<ObjCObjectPointerType>()) { 4148243830Sdim if (ObjCInterfaceDecl *Class = ObjT->getInterfaceDecl()) { 4149243830Sdim if (Class->isArcWeakrefUnavailable()) { 4150243830Sdim S.Diag(AttrLoc, diag::err_arc_unsupported_weak_class); 4151243830Sdim S.Diag(ObjT->getInterfaceDecl()->getLocation(), 4152243830Sdim diag::note_class_declared); 4153243830Sdim } 4154224145Sdim } 4155224145Sdim } 4156224145Sdim } 4157239462Sdim 4158224145Sdim return true; 4159224145Sdim} 4160224145Sdim 4161218893Sdim/// handleObjCGCTypeAttr - Process the __attribute__((objc_gc)) type 4162218893Sdim/// attribute on the specified type. Returns true to indicate that 4163218893Sdim/// the attribute was handled, false to indicate that the type does 4164218893Sdim/// not permit the attribute. 4165218893Sdimstatic bool handleObjCGCTypeAttr(TypeProcessingState &state, 4166218893Sdim AttributeList &attr, 4167218893Sdim QualType &type) { 4168218893Sdim Sema &S = state.getSema(); 4169218893Sdim 4170218893Sdim // Delay if this isn't some kind of pointer. 4171218893Sdim if (!type->isPointerType() && 4172218893Sdim !type->isObjCObjectPointerType() && 4173218893Sdim !type->isBlockPointerType()) 4174218893Sdim return false; 4175218893Sdim 4176218893Sdim if (type.getObjCGCAttr() != Qualifiers::GCNone) { 4177218893Sdim S.Diag(attr.getLoc(), diag::err_attribute_multiple_objc_gc); 4178218893Sdim attr.setInvalid(); 4179218893Sdim return true; 4180193326Sed } 4181263508Sdim 4182193326Sed // Check the attribute arguments. 4183263508Sdim if (!attr.isArgIdent(0)) { 4184263508Sdim S.Diag(attr.getLoc(), diag::err_attribute_argument_type) 4185263508Sdim << attr.getName() << AANT_ArgumentString; 4186218893Sdim attr.setInvalid(); 4187218893Sdim return true; 4188193326Sed } 4189198092Srdivacky Qualifiers::GC GCAttr; 4190263508Sdim if (attr.getNumArgs() > 1) { 4191263508Sdim S.Diag(attr.getLoc(), diag::err_attribute_wrong_number_arguments) 4192263508Sdim << attr.getName() << 1; 4193218893Sdim attr.setInvalid(); 4194218893Sdim return true; 4195193326Sed } 4196263508Sdim 4197263508Sdim IdentifierInfo *II = attr.getArgAsIdent(0)->Ident; 4198263508Sdim if (II->isStr("weak")) 4199198092Srdivacky GCAttr = Qualifiers::Weak; 4200263508Sdim else if (II->isStr("strong")) 4201198092Srdivacky GCAttr = Qualifiers::Strong; 4202193326Sed else { 4203218893Sdim S.Diag(attr.getLoc(), diag::warn_attribute_type_not_supported) 4204263508Sdim << attr.getName() << II; 4205218893Sdim attr.setInvalid(); 4206218893Sdim return true; 4207193326Sed } 4208198092Srdivacky 4209221345Sdim QualType origType = type; 4210221345Sdim type = S.Context.getObjCGCQualType(origType, GCAttr); 4211221345Sdim 4212221345Sdim // Make an attributed type to preserve the source information. 4213221345Sdim if (attr.getLoc().isValid()) 4214221345Sdim type = S.Context.getAttributedType(AttributedType::attr_objc_gc, 4215221345Sdim origType, type); 4216221345Sdim 4217218893Sdim return true; 4218193326Sed} 4219193326Sed 4220218893Sdimnamespace { 4221218893Sdim /// A helper class to unwrap a type down to a function for the 4222218893Sdim /// purposes of applying attributes there. 4223218893Sdim /// 4224218893Sdim /// Use: 4225218893Sdim /// FunctionTypeUnwrapper unwrapped(SemaRef, T); 4226218893Sdim /// if (unwrapped.isFunctionType()) { 4227218893Sdim /// const FunctionType *fn = unwrapped.get(); 4228218893Sdim /// // change fn somehow 4229218893Sdim /// T = unwrapped.wrap(fn); 4230218893Sdim /// } 4231218893Sdim struct FunctionTypeUnwrapper { 4232218893Sdim enum WrapKind { 4233218893Sdim Desugar, 4234218893Sdim Parens, 4235218893Sdim Pointer, 4236218893Sdim BlockPointer, 4237218893Sdim Reference, 4238218893Sdim MemberPointer 4239218893Sdim }; 4240218893Sdim 4241218893Sdim QualType Original; 4242218893Sdim const FunctionType *Fn; 4243226633Sdim SmallVector<unsigned char /*WrapKind*/, 8> Stack; 4244218893Sdim 4245218893Sdim FunctionTypeUnwrapper(Sema &S, QualType T) : Original(T) { 4246218893Sdim while (true) { 4247218893Sdim const Type *Ty = T.getTypePtr(); 4248218893Sdim if (isa<FunctionType>(Ty)) { 4249218893Sdim Fn = cast<FunctionType>(Ty); 4250218893Sdim return; 4251218893Sdim } else if (isa<ParenType>(Ty)) { 4252218893Sdim T = cast<ParenType>(Ty)->getInnerType(); 4253218893Sdim Stack.push_back(Parens); 4254218893Sdim } else if (isa<PointerType>(Ty)) { 4255218893Sdim T = cast<PointerType>(Ty)->getPointeeType(); 4256218893Sdim Stack.push_back(Pointer); 4257218893Sdim } else if (isa<BlockPointerType>(Ty)) { 4258218893Sdim T = cast<BlockPointerType>(Ty)->getPointeeType(); 4259218893Sdim Stack.push_back(BlockPointer); 4260218893Sdim } else if (isa<MemberPointerType>(Ty)) { 4261218893Sdim T = cast<MemberPointerType>(Ty)->getPointeeType(); 4262218893Sdim Stack.push_back(MemberPointer); 4263218893Sdim } else if (isa<ReferenceType>(Ty)) { 4264218893Sdim T = cast<ReferenceType>(Ty)->getPointeeType(); 4265218893Sdim Stack.push_back(Reference); 4266218893Sdim } else { 4267218893Sdim const Type *DTy = Ty->getUnqualifiedDesugaredType(); 4268218893Sdim if (Ty == DTy) { 4269218893Sdim Fn = 0; 4270218893Sdim return; 4271218893Sdim } 4272218893Sdim 4273218893Sdim T = QualType(DTy, 0); 4274218893Sdim Stack.push_back(Desugar); 4275218893Sdim } 4276218893Sdim } 4277203955Srdivacky } 4278198092Srdivacky 4279218893Sdim bool isFunctionType() const { return (Fn != 0); } 4280218893Sdim const FunctionType *get() const { return Fn; } 4281203955Srdivacky 4282218893Sdim QualType wrap(Sema &S, const FunctionType *New) { 4283218893Sdim // If T wasn't modified from the unwrapped type, do nothing. 4284218893Sdim if (New == get()) return Original; 4285218893Sdim 4286218893Sdim Fn = New; 4287218893Sdim return wrap(S.Context, Original, 0); 4288206084Srdivacky } 4289206084Srdivacky 4290218893Sdim private: 4291218893Sdim QualType wrap(ASTContext &C, QualType Old, unsigned I) { 4292218893Sdim if (I == Stack.size()) 4293218893Sdim return C.getQualifiedType(Fn, Old.getQualifiers()); 4294218893Sdim 4295218893Sdim // Build up the inner type, applying the qualifiers from the old 4296218893Sdim // type to the new type. 4297218893Sdim SplitQualType SplitOld = Old.split(); 4298218893Sdim 4299218893Sdim // As a special case, tail-recurse if there are no qualifiers. 4300234353Sdim if (SplitOld.Quals.empty()) 4301234353Sdim return wrap(C, SplitOld.Ty, I); 4302234353Sdim return C.getQualifiedType(wrap(C, SplitOld.Ty, I), SplitOld.Quals); 4303218893Sdim } 4304218893Sdim 4305218893Sdim QualType wrap(ASTContext &C, const Type *Old, unsigned I) { 4306218893Sdim if (I == Stack.size()) return QualType(Fn, 0); 4307218893Sdim 4308218893Sdim switch (static_cast<WrapKind>(Stack[I++])) { 4309218893Sdim case Desugar: 4310218893Sdim // This is the point at which we potentially lose source 4311218893Sdim // information. 4312218893Sdim return wrap(C, Old->getUnqualifiedDesugaredType(), I); 4313218893Sdim 4314218893Sdim case Parens: { 4315218893Sdim QualType New = wrap(C, cast<ParenType>(Old)->getInnerType(), I); 4316218893Sdim return C.getParenType(New); 4317218893Sdim } 4318218893Sdim 4319218893Sdim case Pointer: { 4320218893Sdim QualType New = wrap(C, cast<PointerType>(Old)->getPointeeType(), I); 4321218893Sdim return C.getPointerType(New); 4322218893Sdim } 4323218893Sdim 4324218893Sdim case BlockPointer: { 4325218893Sdim QualType New = wrap(C, cast<BlockPointerType>(Old)->getPointeeType(),I); 4326218893Sdim return C.getBlockPointerType(New); 4327218893Sdim } 4328218893Sdim 4329218893Sdim case MemberPointer: { 4330218893Sdim const MemberPointerType *OldMPT = cast<MemberPointerType>(Old); 4331218893Sdim QualType New = wrap(C, OldMPT->getPointeeType(), I); 4332218893Sdim return C.getMemberPointerType(New, OldMPT->getClass()); 4333218893Sdim } 4334218893Sdim 4335218893Sdim case Reference: { 4336218893Sdim const ReferenceType *OldRef = cast<ReferenceType>(Old); 4337218893Sdim QualType New = wrap(C, OldRef->getPointeeType(), I); 4338218893Sdim if (isa<LValueReferenceType>(OldRef)) 4339218893Sdim return C.getLValueReferenceType(New, OldRef->isSpelledAsLValue()); 4340218893Sdim else 4341218893Sdim return C.getRValueReferenceType(New); 4342218893Sdim } 4343218893Sdim } 4344218893Sdim 4345218893Sdim llvm_unreachable("unknown wrapping kind"); 4346218893Sdim } 4347218893Sdim }; 4348218893Sdim} 4349218893Sdim 4350263508Sdimstatic bool handleMSPointerTypeQualifierAttr(TypeProcessingState &State, 4351263508Sdim AttributeList &Attr, 4352263508Sdim QualType &Type) { 4353263508Sdim Sema &S = State.getSema(); 4354263508Sdim 4355263508Sdim AttributeList::Kind Kind = Attr.getKind(); 4356263508Sdim QualType Desugared = Type; 4357263508Sdim const AttributedType *AT = dyn_cast<AttributedType>(Type); 4358263508Sdim while (AT) { 4359263508Sdim AttributedType::Kind CurAttrKind = AT->getAttrKind(); 4360263508Sdim 4361263508Sdim // You cannot specify duplicate type attributes, so if the attribute has 4362263508Sdim // already been applied, flag it. 4363263508Sdim if (getAttrListKind(CurAttrKind) == Kind) { 4364263508Sdim S.Diag(Attr.getLoc(), diag::warn_duplicate_attribute_exact) 4365263508Sdim << Attr.getName(); 4366263508Sdim return true; 4367263508Sdim } 4368263508Sdim 4369263508Sdim // You cannot have both __sptr and __uptr on the same type, nor can you 4370263508Sdim // have __ptr32 and __ptr64. 4371263508Sdim if ((CurAttrKind == AttributedType::attr_ptr32 && 4372263508Sdim Kind == AttributeList::AT_Ptr64) || 4373263508Sdim (CurAttrKind == AttributedType::attr_ptr64 && 4374263508Sdim Kind == AttributeList::AT_Ptr32)) { 4375263508Sdim S.Diag(Attr.getLoc(), diag::err_attributes_are_not_compatible) 4376263508Sdim << "'__ptr32'" << "'__ptr64'"; 4377263508Sdim return true; 4378263508Sdim } else if ((CurAttrKind == AttributedType::attr_sptr && 4379263508Sdim Kind == AttributeList::AT_UPtr) || 4380263508Sdim (CurAttrKind == AttributedType::attr_uptr && 4381263508Sdim Kind == AttributeList::AT_SPtr)) { 4382263508Sdim S.Diag(Attr.getLoc(), diag::err_attributes_are_not_compatible) 4383263508Sdim << "'__sptr'" << "'__uptr'"; 4384263508Sdim return true; 4385263508Sdim } 4386263508Sdim 4387263508Sdim Desugared = AT->getEquivalentType(); 4388263508Sdim AT = dyn_cast<AttributedType>(Desugared); 4389263508Sdim } 4390263508Sdim 4391263508Sdim // Pointer type qualifiers can only operate on pointer types, but not 4392263508Sdim // pointer-to-member types. 4393263508Sdim if (!isa<PointerType>(Desugared)) { 4394263508Sdim S.Diag(Attr.getLoc(), Type->isMemberPointerType() ? 4395263508Sdim diag::err_attribute_no_member_pointers : 4396263508Sdim diag::err_attribute_pointers_only) << Attr.getName(); 4397263508Sdim return true; 4398263508Sdim } 4399263508Sdim 4400263508Sdim AttributedType::Kind TAK; 4401263508Sdim switch (Kind) { 4402263508Sdim default: llvm_unreachable("Unknown attribute kind"); 4403263508Sdim case AttributeList::AT_Ptr32: TAK = AttributedType::attr_ptr32; break; 4404263508Sdim case AttributeList::AT_Ptr64: TAK = AttributedType::attr_ptr64; break; 4405263508Sdim case AttributeList::AT_SPtr: TAK = AttributedType::attr_sptr; break; 4406263508Sdim case AttributeList::AT_UPtr: TAK = AttributedType::attr_uptr; break; 4407263508Sdim } 4408263508Sdim 4409263508Sdim Type = S.Context.getAttributedType(TAK, Type, Type); 4410263508Sdim return false; 4411263508Sdim} 4412263508Sdim 4413263508Sdimstatic AttributedType::Kind getCCTypeAttrKind(AttributeList &Attr) { 4414263508Sdim assert(!Attr.isInvalid()); 4415263508Sdim switch (Attr.getKind()) { 4416263508Sdim default: 4417263508Sdim llvm_unreachable("not a calling convention attribute"); 4418263508Sdim case AttributeList::AT_CDecl: 4419263508Sdim return AttributedType::attr_cdecl; 4420263508Sdim case AttributeList::AT_FastCall: 4421263508Sdim return AttributedType::attr_fastcall; 4422263508Sdim case AttributeList::AT_StdCall: 4423263508Sdim return AttributedType::attr_stdcall; 4424263508Sdim case AttributeList::AT_ThisCall: 4425263508Sdim return AttributedType::attr_thiscall; 4426263508Sdim case AttributeList::AT_Pascal: 4427263508Sdim return AttributedType::attr_pascal; 4428263508Sdim case AttributeList::AT_Pcs: { 4429263508Sdim // The attribute may have had a fixit applied where we treated an 4430263508Sdim // identifier as a string literal. The contents of the string are valid, 4431263508Sdim // but the form may not be. 4432263508Sdim StringRef Str; 4433263508Sdim if (Attr.isArgExpr(0)) 4434263508Sdim Str = cast<StringLiteral>(Attr.getArgAsExpr(0))->getString(); 4435263508Sdim else 4436263508Sdim Str = Attr.getArgAsIdent(0)->Ident->getName(); 4437263508Sdim return llvm::StringSwitch<AttributedType::Kind>(Str) 4438263508Sdim .Case("aapcs", AttributedType::attr_pcs) 4439263508Sdim .Case("aapcs-vfp", AttributedType::attr_pcs_vfp); 4440263508Sdim } 4441263508Sdim case AttributeList::AT_PnaclCall: 4442263508Sdim return AttributedType::attr_pnaclcall; 4443263508Sdim case AttributeList::AT_IntelOclBicc: 4444263508Sdim return AttributedType::attr_inteloclbicc; 4445263508Sdim case AttributeList::AT_MSABI: 4446263508Sdim return AttributedType::attr_ms_abi; 4447263508Sdim case AttributeList::AT_SysVABI: 4448263508Sdim return AttributedType::attr_sysv_abi; 4449263508Sdim } 4450263508Sdim llvm_unreachable("unexpected attribute kind!"); 4451263508Sdim} 4452263508Sdim 4453218893Sdim/// Process an individual function attribute. Returns true to 4454218893Sdim/// indicate that the attribute was handled, false if it wasn't. 4455218893Sdimstatic bool handleFunctionTypeAttr(TypeProcessingState &state, 4456218893Sdim AttributeList &attr, 4457218893Sdim QualType &type) { 4458218893Sdim Sema &S = state.getSema(); 4459218893Sdim 4460218893Sdim FunctionTypeUnwrapper unwrapped(S, type); 4461218893Sdim 4462239462Sdim if (attr.getKind() == AttributeList::AT_NoReturn) { 4463218893Sdim if (S.CheckNoReturnAttr(attr)) 4464206084Srdivacky return true; 4465206084Srdivacky 4466218893Sdim // Delay if this is not a function type. 4467218893Sdim if (!unwrapped.isFunctionType()) 4468218893Sdim return false; 4469218893Sdim 4470206084Srdivacky // Otherwise we can process right away. 4471218893Sdim FunctionType::ExtInfo EI = unwrapped.get()->getExtInfo().withNoReturn(true); 4472218893Sdim type = unwrapped.wrap(S, S.Context.adjustFunctionType(unwrapped.get(), EI)); 4473218893Sdim return true; 4474218893Sdim } 4475206084Srdivacky 4476224145Sdim // ns_returns_retained is not always a type attribute, but if we got 4477224145Sdim // here, we're treating it as one right now. 4478239462Sdim if (attr.getKind() == AttributeList::AT_NSReturnsRetained) { 4479234353Sdim assert(S.getLangOpts().ObjCAutoRefCount && 4480224145Sdim "ns_returns_retained treated as type attribute in non-ARC"); 4481224145Sdim if (attr.getNumArgs()) return true; 4482224145Sdim 4483224145Sdim // Delay if this is not a function type. 4484224145Sdim if (!unwrapped.isFunctionType()) 4485224145Sdim return false; 4486224145Sdim 4487224145Sdim FunctionType::ExtInfo EI 4488224145Sdim = unwrapped.get()->getExtInfo().withProducesResult(true); 4489224145Sdim type = unwrapped.wrap(S, S.Context.adjustFunctionType(unwrapped.get(), EI)); 4490224145Sdim return true; 4491224145Sdim } 4492224145Sdim 4493239462Sdim if (attr.getKind() == AttributeList::AT_Regparm) { 4494218893Sdim unsigned value; 4495218893Sdim if (S.CheckRegparmAttr(attr, value)) 4496218893Sdim return true; 4497218893Sdim 4498218893Sdim // Delay if this is not a function type. 4499218893Sdim if (!unwrapped.isFunctionType()) 4500206084Srdivacky return false; 4501206084Srdivacky 4502218893Sdim // Diagnose regparm with fastcall. 4503218893Sdim const FunctionType *fn = unwrapped.get(); 4504218893Sdim CallingConv CC = fn->getCallConv(); 4505218893Sdim if (CC == CC_X86FastCall) { 4506218893Sdim S.Diag(attr.getLoc(), diag::err_attributes_are_not_compatible) 4507218893Sdim << FunctionType::getNameForCallConv(CC) 4508218893Sdim << "regparm"; 4509218893Sdim attr.setInvalid(); 4510218893Sdim return true; 4511218893Sdim } 4512218893Sdim 4513239462Sdim FunctionType::ExtInfo EI = 4514218893Sdim unwrapped.get()->getExtInfo().withRegParm(value); 4515218893Sdim type = unwrapped.wrap(S, S.Context.adjustFunctionType(unwrapped.get(), EI)); 4516218893Sdim return true; 4517206084Srdivacky } 4518206084Srdivacky 4519243830Sdim // Delay if the type didn't work out to a function. 4520243830Sdim if (!unwrapped.isFunctionType()) return false; 4521243830Sdim 4522203955Srdivacky // Otherwise, a calling convention. 4523218893Sdim CallingConv CC; 4524218893Sdim if (S.CheckCallingConvAttr(attr, CC)) 4525218893Sdim return true; 4526203955Srdivacky 4527218893Sdim const FunctionType *fn = unwrapped.get(); 4528218893Sdim CallingConv CCOld = fn->getCallConv(); 4529263508Sdim AttributedType::Kind CCAttrKind = getCCTypeAttrKind(attr); 4530263508Sdim 4531263508Sdim if (CCOld != CC) { 4532263508Sdim // Error out on when there's already an attribute on the type 4533263508Sdim // and the CCs don't match. 4534263508Sdim const AttributedType *AT = S.getCallingConvAttributedType(type); 4535263508Sdim if (AT && AT->getAttrKind() != CCAttrKind) { 4536263508Sdim S.Diag(attr.getLoc(), diag::err_attributes_are_not_compatible) 4537263508Sdim << FunctionType::getNameForCallConv(CC) 4538263508Sdim << FunctionType::getNameForCallConv(CCOld); 4539263508Sdim attr.setInvalid(); 4540263508Sdim return true; 4541263508Sdim } 4542207619Srdivacky } 4543203955Srdivacky 4544263508Sdim // Diagnose use of callee-cleanup calling convention on variadic functions. 4545263508Sdim if (isCalleeCleanup(CC)) { 4546263508Sdim const FunctionProtoType *FnP = dyn_cast<FunctionProtoType>(fn); 4547263508Sdim if (FnP && FnP->isVariadic()) { 4548263508Sdim unsigned DiagID = diag::err_cconv_varargs; 4549263508Sdim // stdcall and fastcall are ignored with a warning for GCC and MS 4550263508Sdim // compatibility. 4551263508Sdim if (CC == CC_X86StdCall || CC == CC_X86FastCall) 4552263508Sdim DiagID = diag::warn_cconv_varargs; 4553263508Sdim 4554263508Sdim S.Diag(attr.getLoc(), DiagID) << FunctionType::getNameForCallConv(CC); 4555263508Sdim attr.setInvalid(); 4556263508Sdim return true; 4557263508Sdim } 4558203955Srdivacky } 4559203955Srdivacky 4560263508Sdim // Diagnose the use of X86 fastcall on unprototyped functions. 4561203955Srdivacky if (CC == CC_X86FastCall) { 4562218893Sdim if (isa<FunctionNoProtoType>(fn)) { 4563218893Sdim S.Diag(attr.getLoc(), diag::err_cconv_knr) 4564203955Srdivacky << FunctionType::getNameForCallConv(CC); 4565218893Sdim attr.setInvalid(); 4566218893Sdim return true; 4567203955Srdivacky } 4568203955Srdivacky 4569218893Sdim // Also diagnose fastcall with regparm. 4570221345Sdim if (fn->getHasRegParm()) { 4571218893Sdim S.Diag(attr.getLoc(), diag::err_attributes_are_not_compatible) 4572218893Sdim << "regparm" 4573218893Sdim << FunctionType::getNameForCallConv(CC); 4574218893Sdim attr.setInvalid(); 4575218893Sdim return true; 4576218893Sdim } 4577203955Srdivacky } 4578203955Srdivacky 4579263508Sdim // Modify the CC from the wrapped function type, wrap it all back, and then 4580263508Sdim // wrap the whole thing in an AttributedType as written. The modified type 4581263508Sdim // might have a different CC if we ignored the attribute. 4582218893Sdim FunctionType::ExtInfo EI = unwrapped.get()->getExtInfo().withCallingConv(CC); 4583263508Sdim QualType Equivalent = 4584263508Sdim unwrapped.wrap(S, S.Context.adjustFunctionType(unwrapped.get(), EI)); 4585263508Sdim type = S.Context.getAttributedType(CCAttrKind, type, Equivalent); 4586218893Sdim return true; 4587198092Srdivacky} 4588198092Srdivacky 4589263508Sdimvoid Sema::adjustMemberFunctionCC(QualType &T, bool IsStatic) { 4590263508Sdim const FunctionType *FT = T->castAs<FunctionType>(); 4591263508Sdim bool IsVariadic = (isa<FunctionProtoType>(FT) && 4592263508Sdim cast<FunctionProtoType>(FT)->isVariadic()); 4593263508Sdim CallingConv CC = FT->getCallConv(); 4594263508Sdim 4595263508Sdim // Only adjust types with the default convention. For example, on Windows we 4596263508Sdim // should adjust a __cdecl type to __thiscall for instance methods, and a 4597263508Sdim // __thiscall type to __cdecl for static methods. 4598263508Sdim CallingConv DefaultCC = 4599263508Sdim Context.getDefaultCallingConvention(IsVariadic, IsStatic); 4600263508Sdim if (CC != DefaultCC) 4601263508Sdim return; 4602263508Sdim 4603263508Sdim // Check if there was an explicit attribute, but only look through parens. 4604263508Sdim // The intent is to look for an attribute on the current declarator, but not 4605263508Sdim // one that came from a typedef. 4606263508Sdim QualType R = T.IgnoreParens(); 4607263508Sdim while (const AttributedType *AT = dyn_cast<AttributedType>(R)) { 4608263508Sdim if (AT->isCallingConv()) 4609263508Sdim return; 4610263508Sdim R = AT->getModifiedType().IgnoreParens(); 4611263508Sdim } 4612263508Sdim 4613263508Sdim // FIXME: This loses sugar. This should probably be fixed with an implicit 4614263508Sdim // AttributedType node that adjusts the convention. 4615263508Sdim CC = Context.getDefaultCallingConvention(IsVariadic, !IsStatic); 4616263508Sdim FT = Context.adjustFunctionType(FT, FT->getExtInfo().withCallingConv(CC)); 4617263508Sdim FunctionTypeUnwrapper Unwrapped(*this, T); 4618263508Sdim T = Unwrapped.wrap(*this, FT); 4619263508Sdim} 4620263508Sdim 4621221345Sdim/// Handle OpenCL image access qualifiers: read_only, write_only, read_write 4622221345Sdimstatic void HandleOpenCLImageAccessAttribute(QualType& CurType, 4623221345Sdim const AttributeList &Attr, 4624221345Sdim Sema &S) { 4625221345Sdim // Check the attribute arguments. 4626221345Sdim if (Attr.getNumArgs() != 1) { 4627263508Sdim S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments) 4628263508Sdim << Attr.getName() << 1; 4629221345Sdim Attr.setInvalid(); 4630221345Sdim return; 4631221345Sdim } 4632263508Sdim Expr *sizeExpr = static_cast<Expr *>(Attr.getArgAsExpr(0)); 4633221345Sdim llvm::APSInt arg(32); 4634221345Sdim if (sizeExpr->isTypeDependent() || sizeExpr->isValueDependent() || 4635221345Sdim !sizeExpr->isIntegerConstantExpr(arg, S.Context)) { 4636263508Sdim S.Diag(Attr.getLoc(), diag::err_attribute_argument_type) 4637263508Sdim << Attr.getName() << AANT_ArgumentIntegerConstant 4638263508Sdim << sizeExpr->getSourceRange(); 4639221345Sdim Attr.setInvalid(); 4640221345Sdim return; 4641221345Sdim } 4642221345Sdim unsigned iarg = static_cast<unsigned>(arg.getZExtValue()); 4643221345Sdim switch (iarg) { 4644221345Sdim case CLIA_read_only: 4645221345Sdim case CLIA_write_only: 4646221345Sdim case CLIA_read_write: 4647221345Sdim // Implemented in a separate patch 4648221345Sdim break; 4649221345Sdim default: 4650221345Sdim // Implemented in a separate patch 4651221345Sdim S.Diag(Attr.getLoc(), diag::err_attribute_invalid_size) 4652221345Sdim << sizeExpr->getSourceRange(); 4653221345Sdim Attr.setInvalid(); 4654221345Sdim break; 4655221345Sdim } 4656221345Sdim} 4657221345Sdim 4658200583Srdivacky/// HandleVectorSizeAttribute - this attribute is only applicable to integral 4659200583Srdivacky/// and float scalars, although arrays, pointers, and function return values are 4660200583Srdivacky/// allowed in conjunction with this construct. Aggregates with this attribute 4661200583Srdivacky/// are invalid, even if they are of the same size as a corresponding scalar. 4662200583Srdivacky/// The raw attribute should contain precisely 1 argument, the vector size for 4663200583Srdivacky/// the variable, measured in bytes. If curType and rawAttr are well formed, 4664200583Srdivacky/// this routine will return a new vector type. 4665210299Sedstatic void HandleVectorSizeAttr(QualType& CurType, const AttributeList &Attr, 4666210299Sed Sema &S) { 4667218893Sdim // Check the attribute arguments. 4668200583Srdivacky if (Attr.getNumArgs() != 1) { 4669263508Sdim S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments) 4670263508Sdim << Attr.getName() << 1; 4671207619Srdivacky Attr.setInvalid(); 4672200583Srdivacky return; 4673200583Srdivacky } 4674263508Sdim Expr *sizeExpr = static_cast<Expr *>(Attr.getArgAsExpr(0)); 4675200583Srdivacky llvm::APSInt vecSize(32); 4676208600Srdivacky if (sizeExpr->isTypeDependent() || sizeExpr->isValueDependent() || 4677208600Srdivacky !sizeExpr->isIntegerConstantExpr(vecSize, S.Context)) { 4678263508Sdim S.Diag(Attr.getLoc(), diag::err_attribute_argument_type) 4679263508Sdim << Attr.getName() << AANT_ArgumentIntegerConstant 4680263508Sdim << sizeExpr->getSourceRange(); 4681207619Srdivacky Attr.setInvalid(); 4682200583Srdivacky return; 4683200583Srdivacky } 4684263508Sdim // The base type must be integer (not Boolean or enumeration) or float, and 4685263508Sdim // can't already be a vector. 4686263508Sdim if (!CurType->isBuiltinType() || CurType->isBooleanType() || 4687263508Sdim (!CurType->isIntegerType() && !CurType->isRealFloatingType())) { 4688200583Srdivacky S.Diag(Attr.getLoc(), diag::err_attribute_invalid_vector_type) << CurType; 4689207619Srdivacky Attr.setInvalid(); 4690200583Srdivacky return; 4691200583Srdivacky } 4692200583Srdivacky unsigned typeSize = static_cast<unsigned>(S.Context.getTypeSize(CurType)); 4693200583Srdivacky // vecSize is specified in bytes - convert to bits. 4694200583Srdivacky unsigned vectorSize = static_cast<unsigned>(vecSize.getZExtValue() * 8); 4695200583Srdivacky 4696200583Srdivacky // the vector size needs to be an integral multiple of the type size. 4697200583Srdivacky if (vectorSize % typeSize) { 4698200583Srdivacky S.Diag(Attr.getLoc(), diag::err_attribute_invalid_size) 4699200583Srdivacky << sizeExpr->getSourceRange(); 4700207619Srdivacky Attr.setInvalid(); 4701200583Srdivacky return; 4702200583Srdivacky } 4703263508Sdim if (VectorType::isVectorSizeTooLarge(vectorSize / typeSize)) { 4704263508Sdim S.Diag(Attr.getLoc(), diag::err_attribute_size_too_large) 4705263508Sdim << sizeExpr->getSourceRange(); 4706263508Sdim Attr.setInvalid(); 4707263508Sdim return; 4708263508Sdim } 4709200583Srdivacky if (vectorSize == 0) { 4710200583Srdivacky S.Diag(Attr.getLoc(), diag::err_attribute_zero_size) 4711200583Srdivacky << sizeExpr->getSourceRange(); 4712207619Srdivacky Attr.setInvalid(); 4713200583Srdivacky return; 4714200583Srdivacky } 4715200583Srdivacky 4716200583Srdivacky // Success! Instantiate the vector type, the number of elements is > 0, and 4717200583Srdivacky // not required to be a power of 2, unlike GCC. 4718210299Sed CurType = S.Context.getVectorType(CurType, vectorSize/typeSize, 4719218893Sdim VectorType::GenericVector); 4720200583Srdivacky} 4721200583Srdivacky 4722224145Sdim/// \brief Process the OpenCL-like ext_vector_type attribute when it occurs on 4723224145Sdim/// a type. 4724239462Sdimstatic void HandleExtVectorTypeAttr(QualType &CurType, 4725239462Sdim const AttributeList &Attr, 4726224145Sdim Sema &S) { 4727263508Sdim // check the attribute arguments. 4728263508Sdim if (Attr.getNumArgs() != 1) { 4729263508Sdim S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments) 4730263508Sdim << Attr.getName() << 1; 4731263508Sdim return; 4732263508Sdim } 4733263508Sdim 4734224145Sdim Expr *sizeExpr; 4735239462Sdim 4736224145Sdim // Special case where the argument is a template id. 4737263508Sdim if (Attr.isArgIdent(0)) { 4738224145Sdim CXXScopeSpec SS; 4739234353Sdim SourceLocation TemplateKWLoc; 4740224145Sdim UnqualifiedId id; 4741263508Sdim id.setIdentifier(Attr.getArgAsIdent(0)->Ident, Attr.getLoc()); 4742234353Sdim 4743234353Sdim ExprResult Size = S.ActOnIdExpression(S.getCurScope(), SS, TemplateKWLoc, 4744234353Sdim id, false, false); 4745224145Sdim if (Size.isInvalid()) 4746224145Sdim return; 4747239462Sdim 4748224145Sdim sizeExpr = Size.get(); 4749224145Sdim } else { 4750263508Sdim sizeExpr = Attr.getArgAsExpr(0); 4751224145Sdim } 4752239462Sdim 4753224145Sdim // Create the vector type. 4754224145Sdim QualType T = S.BuildExtVectorType(CurType, sizeExpr, Attr.getLoc()); 4755224145Sdim if (!T.isNull()) 4756224145Sdim CurType = T; 4757224145Sdim} 4758224145Sdim 4759263508Sdimstatic bool isPermittedNeonBaseType(QualType &Ty, 4760263508Sdim VectorType::VectorKind VecKind, 4761263508Sdim bool IsAArch64) { 4762263508Sdim const BuiltinType *BTy = Ty->getAs<BuiltinType>(); 4763263508Sdim if (!BTy) 4764263508Sdim return false; 4765263508Sdim 4766263508Sdim if (VecKind == VectorType::NeonPolyVector) { 4767263508Sdim if (IsAArch64) { 4768263508Sdim // AArch64 polynomial vectors are unsigned and support poly64. 4769263508Sdim return BTy->getKind() == BuiltinType::UChar || 4770263508Sdim BTy->getKind() == BuiltinType::UShort || 4771263508Sdim BTy->getKind() == BuiltinType::ULongLong; 4772263508Sdim } else { 4773263508Sdim // AArch32 polynomial vector are signed. 4774263508Sdim return BTy->getKind() == BuiltinType::SChar || 4775263508Sdim BTy->getKind() == BuiltinType::Short; 4776263508Sdim } 4777263508Sdim } 4778263508Sdim 4779263508Sdim // Non-polynomial vector types: the usual suspects are allowed, as well as 4780263508Sdim // float64_t on AArch64. 4781263508Sdim if (IsAArch64 && BTy->getKind() == BuiltinType::Double) 4782263508Sdim return true; 4783263508Sdim 4784263508Sdim return BTy->getKind() == BuiltinType::SChar || 4785263508Sdim BTy->getKind() == BuiltinType::UChar || 4786263508Sdim BTy->getKind() == BuiltinType::Short || 4787263508Sdim BTy->getKind() == BuiltinType::UShort || 4788263508Sdim BTy->getKind() == BuiltinType::Int || 4789263508Sdim BTy->getKind() == BuiltinType::UInt || 4790263508Sdim BTy->getKind() == BuiltinType::LongLong || 4791263508Sdim BTy->getKind() == BuiltinType::ULongLong || 4792263508Sdim BTy->getKind() == BuiltinType::Float || 4793263508Sdim BTy->getKind() == BuiltinType::Half; 4794263508Sdim} 4795263508Sdim 4796218893Sdim/// HandleNeonVectorTypeAttr - The "neon_vector_type" and 4797218893Sdim/// "neon_polyvector_type" attributes are used to create vector types that 4798218893Sdim/// are mangled according to ARM's ABI. Otherwise, these types are identical 4799218893Sdim/// to those created with the "vector_size" attribute. Unlike "vector_size" 4800218893Sdim/// the argument to these Neon attributes is the number of vector elements, 4801218893Sdim/// not the vector size in bytes. The vector width and element type must 4802218893Sdim/// match one of the standard Neon vector types. 4803218893Sdimstatic void HandleNeonVectorTypeAttr(QualType& CurType, 4804218893Sdim const AttributeList &Attr, Sema &S, 4805263508Sdim VectorType::VectorKind VecKind) { 4806263508Sdim // Target must have NEON 4807263508Sdim if (!S.Context.getTargetInfo().hasFeature("neon")) { 4808263508Sdim S.Diag(Attr.getLoc(), diag::err_attribute_unsupported) << Attr.getName(); 4809263508Sdim Attr.setInvalid(); 4810263508Sdim return; 4811263508Sdim } 4812218893Sdim // Check the attribute arguments. 4813218893Sdim if (Attr.getNumArgs() != 1) { 4814263508Sdim S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments) 4815263508Sdim << Attr.getName() << 1; 4816218893Sdim Attr.setInvalid(); 4817218893Sdim return; 4818218893Sdim } 4819218893Sdim // The number of elements must be an ICE. 4820263508Sdim Expr *numEltsExpr = static_cast<Expr *>(Attr.getArgAsExpr(0)); 4821218893Sdim llvm::APSInt numEltsInt(32); 4822218893Sdim if (numEltsExpr->isTypeDependent() || numEltsExpr->isValueDependent() || 4823218893Sdim !numEltsExpr->isIntegerConstantExpr(numEltsInt, S.Context)) { 4824263508Sdim S.Diag(Attr.getLoc(), diag::err_attribute_argument_type) 4825263508Sdim << Attr.getName() << AANT_ArgumentIntegerConstant 4826263508Sdim << numEltsExpr->getSourceRange(); 4827218893Sdim Attr.setInvalid(); 4828218893Sdim return; 4829218893Sdim } 4830218893Sdim // Only certain element types are supported for Neon vectors. 4831263508Sdim llvm::Triple::ArchType Arch = 4832263508Sdim S.Context.getTargetInfo().getTriple().getArch(); 4833263508Sdim if (!isPermittedNeonBaseType(CurType, VecKind, 4834263508Sdim Arch == llvm::Triple::aarch64)) { 4835263508Sdim S.Diag(Attr.getLoc(), diag::err_attribute_invalid_vector_type) << CurType; 4836218893Sdim Attr.setInvalid(); 4837218893Sdim return; 4838218893Sdim } 4839263508Sdim 4840218893Sdim // The total size of the vector must be 64 or 128 bits. 4841218893Sdim unsigned typeSize = static_cast<unsigned>(S.Context.getTypeSize(CurType)); 4842218893Sdim unsigned numElts = static_cast<unsigned>(numEltsInt.getZExtValue()); 4843218893Sdim unsigned vecSize = typeSize * numElts; 4844218893Sdim if (vecSize != 64 && vecSize != 128) { 4845218893Sdim S.Diag(Attr.getLoc(), diag::err_attribute_bad_neon_vector_size) << CurType; 4846218893Sdim Attr.setInvalid(); 4847218893Sdim return; 4848218893Sdim } 4849218893Sdim 4850218893Sdim CurType = S.Context.getVectorType(CurType, numElts, VecKind); 4851218893Sdim} 4852218893Sdim 4853218893Sdimstatic void processTypeAttrs(TypeProcessingState &state, QualType &type, 4854249423Sdim TypeAttrLocation TAL, AttributeList *attrs) { 4855193326Sed // Scan through and apply attributes to this type where it makes sense. Some 4856193326Sed // attributes (such as __address_space__, __vector_size__, etc) apply to the 4857193326Sed // type, but others can be present in the type specifiers even though they 4858193326Sed // apply to the decl. Here we apply type attributes and ignore the rest. 4859218893Sdim 4860218893Sdim AttributeList *next; 4861218893Sdim do { 4862218893Sdim AttributeList &attr = *attrs; 4863218893Sdim next = attr.getNext(); 4864218893Sdim 4865207619Srdivacky // Skip attributes that were marked to be invalid. 4866218893Sdim if (attr.isInvalid()) 4867207619Srdivacky continue; 4868207619Srdivacky 4869249423Sdim if (attr.isCXX11Attribute()) { 4870249423Sdim // [[gnu::...]] attributes are treated as declaration attributes, so may 4871249423Sdim // not appertain to a DeclaratorChunk, even if we handle them as type 4872249423Sdim // attributes. 4873249423Sdim if (attr.getScopeName() && attr.getScopeName()->isStr("gnu")) { 4874249423Sdim if (TAL == TAL_DeclChunk) { 4875249423Sdim state.getSema().Diag(attr.getLoc(), 4876249423Sdim diag::warn_cxx11_gnu_attribute_on_type) 4877249423Sdim << attr.getName(); 4878249423Sdim continue; 4879249423Sdim } 4880249423Sdim } else if (TAL != TAL_DeclChunk) { 4881249423Sdim // Otherwise, only consider type processing for a C++11 attribute if 4882249423Sdim // it's actually been applied to a type. 4883249423Sdim continue; 4884249423Sdim } 4885249423Sdim } 4886249423Sdim 4887207619Srdivacky // If this is an attribute we can handle, do so now, 4888207619Srdivacky // otherwise, add it to the FnAttrs list for rechaining. 4889218893Sdim switch (attr.getKind()) { 4890249423Sdim default: 4891249423Sdim // A C++11 attribute on a declarator chunk must appertain to a type. 4892249423Sdim if (attr.isCXX11Attribute() && TAL == TAL_DeclChunk) { 4893249423Sdim state.getSema().Diag(attr.getLoc(), diag::err_attribute_not_type_attr) 4894249423Sdim << attr.getName(); 4895249423Sdim attr.setUsedAsTypeAttr(); 4896249423Sdim } 4897249423Sdim break; 4898203955Srdivacky 4899249423Sdim case AttributeList::UnknownAttribute: 4900249423Sdim if (attr.isCXX11Attribute() && TAL == TAL_DeclChunk) 4901249423Sdim state.getSema().Diag(attr.getLoc(), 4902249423Sdim diag::warn_unknown_attribute_ignored) 4903249423Sdim << attr.getName(); 4904249423Sdim break; 4905249423Sdim 4906249423Sdim case AttributeList::IgnoredAttribute: 4907249423Sdim break; 4908249423Sdim 4909239462Sdim case AttributeList::AT_MayAlias: 4910226633Sdim // FIXME: This attribute needs to actually be handled, but if we ignore 4911226633Sdim // it it breaks large amounts of Linux software. 4912226633Sdim attr.setUsedAsTypeAttr(); 4913226633Sdim break; 4914239462Sdim case AttributeList::AT_AddressSpace: 4915218893Sdim HandleAddressSpaceTypeAttribute(type, attr, state.getSema()); 4916226633Sdim attr.setUsedAsTypeAttr(); 4917193326Sed break; 4918218893Sdim OBJC_POINTER_TYPE_ATTRS_CASELIST: 4919218893Sdim if (!handleObjCPointerTypeAttr(state, attr, type)) 4920218893Sdim distributeObjCPointerTypeAttr(state, attr, type); 4921226633Sdim attr.setUsedAsTypeAttr(); 4922193326Sed break; 4923239462Sdim case AttributeList::AT_VectorSize: 4924218893Sdim HandleVectorSizeAttr(type, attr, state.getSema()); 4925226633Sdim attr.setUsedAsTypeAttr(); 4926203955Srdivacky break; 4927239462Sdim case AttributeList::AT_ExtVectorType: 4928249423Sdim HandleExtVectorTypeAttr(type, attr, state.getSema()); 4929226633Sdim attr.setUsedAsTypeAttr(); 4930224145Sdim break; 4931239462Sdim case AttributeList::AT_NeonVectorType: 4932218893Sdim HandleNeonVectorTypeAttr(type, attr, state.getSema(), 4933263508Sdim VectorType::NeonVector); 4934226633Sdim attr.setUsedAsTypeAttr(); 4935218893Sdim break; 4936239462Sdim case AttributeList::AT_NeonPolyVectorType: 4937218893Sdim HandleNeonVectorTypeAttr(type, attr, state.getSema(), 4938263508Sdim VectorType::NeonPolyVector); 4939226633Sdim attr.setUsedAsTypeAttr(); 4940218893Sdim break; 4941239462Sdim case AttributeList::AT_OpenCLImageAccess: 4942221345Sdim HandleOpenCLImageAccessAttribute(type, attr, state.getSema()); 4943226633Sdim attr.setUsedAsTypeAttr(); 4944221345Sdim break; 4945221345Sdim 4946239462Sdim case AttributeList::AT_Win64: 4947239462Sdim attr.setUsedAsTypeAttr(); 4948239462Sdim break; 4949263508Sdim MS_TYPE_ATTRS_CASELIST: 4950263508Sdim if (!handleMSPointerTypeQualifierAttr(state, attr, type)) 4951263508Sdim attr.setUsedAsTypeAttr(); 4952263508Sdim break; 4953239462Sdim 4954239462Sdim case AttributeList::AT_NSReturnsRetained: 4955234353Sdim if (!state.getSema().getLangOpts().ObjCAutoRefCount) 4956249423Sdim break; 4957224145Sdim // fallthrough into the function attrs 4958224145Sdim 4959218893Sdim FUNCTION_TYPE_ATTRS_CASELIST: 4960226633Sdim attr.setUsedAsTypeAttr(); 4961226633Sdim 4962218893Sdim // Never process function type attributes as part of the 4963218893Sdim // declaration-specifiers. 4964249423Sdim if (TAL == TAL_DeclSpec) 4965218893Sdim distributeFunctionTypeAttrFromDeclSpec(state, attr, type); 4966218893Sdim 4967218893Sdim // Otherwise, handle the possible delays. 4968218893Sdim else if (!handleFunctionTypeAttr(state, attr, type)) 4969218893Sdim distributeFunctionTypeAttr(state, attr, type); 4970198092Srdivacky break; 4971193326Sed } 4972218893Sdim } while ((attrs = next)); 4973193326Sed} 4974193326Sed 4975223017Sdim/// \brief Ensure that the type of the given expression is complete. 4976223017Sdim/// 4977223017Sdim/// This routine checks whether the expression \p E has a complete type. If the 4978223017Sdim/// expression refers to an instantiable construct, that instantiation is 4979223017Sdim/// performed as needed to complete its type. Furthermore 4980223017Sdim/// Sema::RequireCompleteType is called for the expression's type (or in the 4981223017Sdim/// case of a reference type, the referred-to type). 4982223017Sdim/// 4983223017Sdim/// \param E The expression whose type is required to be complete. 4984239462Sdim/// \param Diagnoser The object that will emit a diagnostic if the type is 4985239462Sdim/// incomplete. 4986223017Sdim/// 4987223017Sdim/// \returns \c true if the type of \p E is incomplete and diagnosed, \c false 4988223017Sdim/// otherwise. 4989239462Sdimbool Sema::RequireCompleteExprType(Expr *E, TypeDiagnoser &Diagnoser){ 4990223017Sdim QualType T = E->getType(); 4991223017Sdim 4992223017Sdim // Fast path the case where the type is already complete. 4993223017Sdim if (!T->isIncompleteType()) 4994263508Sdim // FIXME: The definition might not be visible. 4995223017Sdim return false; 4996223017Sdim 4997223017Sdim // Incomplete array types may be completed by the initializer attached to 4998263508Sdim // their definitions. For static data members of class templates and for 4999263508Sdim // variable templates, we need to instantiate the definition to get this 5000263508Sdim // initializer and complete the type. 5001223017Sdim if (T->isIncompleteArrayType()) { 5002223017Sdim if (DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(E->IgnoreParens())) { 5003223017Sdim if (VarDecl *Var = dyn_cast<VarDecl>(DRE->getDecl())) { 5004263508Sdim if (isTemplateInstantiation(Var->getTemplateSpecializationKind())) { 5005263508Sdim SourceLocation PointOfInstantiation = E->getExprLoc(); 5006239462Sdim 5007263508Sdim if (MemberSpecializationInfo *MSInfo = 5008263508Sdim Var->getMemberSpecializationInfo()) { 5009223017Sdim // If we don't already have a point of instantiation, this is it. 5010223017Sdim if (MSInfo->getPointOfInstantiation().isInvalid()) { 5011263508Sdim MSInfo->setPointOfInstantiation(PointOfInstantiation); 5012239462Sdim 5013239462Sdim // This is a modification of an existing AST node. Notify 5014223017Sdim // listeners. 5015223017Sdim if (ASTMutationListener *L = getASTMutationListener()) 5016223017Sdim L->StaticDataMemberInstantiated(Var); 5017223017Sdim } 5018263508Sdim } else { 5019263508Sdim VarTemplateSpecializationDecl *VarSpec = 5020263508Sdim cast<VarTemplateSpecializationDecl>(Var); 5021263508Sdim if (VarSpec->getPointOfInstantiation().isInvalid()) 5022263508Sdim VarSpec->setPointOfInstantiation(PointOfInstantiation); 5023263508Sdim } 5024239462Sdim 5025263508Sdim InstantiateVariableDefinition(PointOfInstantiation, Var); 5026239462Sdim 5027263508Sdim // Update the type to the newly instantiated definition's type both 5028263508Sdim // here and within the expression. 5029263508Sdim if (VarDecl *Def = Var->getDefinition()) { 5030263508Sdim DRE->setDecl(Def); 5031263508Sdim T = Def->getType(); 5032263508Sdim DRE->setType(T); 5033263508Sdim E->setType(T); 5034223017Sdim } 5035239462Sdim 5036223017Sdim // We still go on to try to complete the type independently, as it 5037223017Sdim // may also require instantiations or diagnostics if it remains 5038223017Sdim // incomplete. 5039223017Sdim } 5040223017Sdim } 5041223017Sdim } 5042223017Sdim } 5043223017Sdim 5044223017Sdim // FIXME: Are there other cases which require instantiating something other 5045223017Sdim // than the type to complete the type of an expression? 5046223017Sdim 5047223017Sdim // Look through reference types and complete the referred type. 5048223017Sdim if (const ReferenceType *Ref = T->getAs<ReferenceType>()) 5049223017Sdim T = Ref->getPointeeType(); 5050223017Sdim 5051239462Sdim return RequireCompleteType(E->getExprLoc(), T, Diagnoser); 5052223017Sdim} 5053223017Sdim 5054239462Sdimnamespace { 5055239462Sdim struct TypeDiagnoserDiag : Sema::TypeDiagnoser { 5056239462Sdim unsigned DiagID; 5057239462Sdim 5058239462Sdim TypeDiagnoserDiag(unsigned DiagID) 5059239462Sdim : Sema::TypeDiagnoser(DiagID == 0), DiagID(DiagID) {} 5060239462Sdim 5061239462Sdim virtual void diagnose(Sema &S, SourceLocation Loc, QualType T) { 5062239462Sdim if (Suppressed) return; 5063239462Sdim S.Diag(Loc, DiagID) << T; 5064239462Sdim } 5065239462Sdim }; 5066239462Sdim} 5067239462Sdim 5068239462Sdimbool Sema::RequireCompleteExprType(Expr *E, unsigned DiagID) { 5069239462Sdim TypeDiagnoserDiag Diagnoser(DiagID); 5070239462Sdim return RequireCompleteExprType(E, Diagnoser); 5071239462Sdim} 5072239462Sdim 5073198092Srdivacky/// @brief Ensure that the type T is a complete type. 5074193326Sed/// 5075193326Sed/// This routine checks whether the type @p T is complete in any 5076193326Sed/// context where a complete type is required. If @p T is a complete 5077193326Sed/// type, returns false. If @p T is a class template specialization, 5078193326Sed/// this routine then attempts to perform class template 5079193326Sed/// instantiation. If instantiation fails, or if @p T is incomplete 5080193326Sed/// and cannot be completed, issues the diagnostic @p diag (giving it 5081193326Sed/// the type @p T) and returns true. 5082193326Sed/// 5083193326Sed/// @param Loc The location in the source that the incomplete type 5084193326Sed/// diagnostic should refer to. 5085193326Sed/// 5086193326Sed/// @param T The type that this routine is examining for completeness. 5087193326Sed/// 5088193326Sed/// @returns @c true if @p T is incomplete and a diagnostic was emitted, 5089193326Sed/// @c false otherwise. 5090198092Srdivackybool Sema::RequireCompleteType(SourceLocation Loc, QualType T, 5091239462Sdim TypeDiagnoser &Diagnoser) { 5092263508Sdim if (RequireCompleteTypeImpl(Loc, T, Diagnoser)) 5093263508Sdim return true; 5094263508Sdim if (const TagType *Tag = T->getAs<TagType>()) { 5095263508Sdim if (!Tag->getDecl()->isCompleteDefinitionRequired()) { 5096263508Sdim Tag->getDecl()->setCompleteDefinitionRequired(); 5097263508Sdim Consumer.HandleTagDeclRequiredDefinition(Tag->getDecl()); 5098263508Sdim } 5099263508Sdim } 5100263508Sdim return false; 5101263508Sdim} 5102263508Sdim 5103263508Sdim/// \brief The implementation of RequireCompleteType 5104263508Sdimbool Sema::RequireCompleteTypeImpl(SourceLocation Loc, QualType T, 5105263508Sdim TypeDiagnoser &Diagnoser) { 5106198398Srdivacky // FIXME: Add this assertion to make sure we always get instantiation points. 5107198398Srdivacky // assert(!Loc.isInvalid() && "Invalid location in RequireCompleteType"); 5108193326Sed // FIXME: Add this assertion to help us flush out problems with 5109193326Sed // checking for dependent types and type-dependent expressions. 5110193326Sed // 5111198092Srdivacky // assert(!T->isDependentType() && 5112193326Sed // "Can't ask whether a dependent type is complete"); 5113193326Sed 5114193326Sed // If we have a complete type, we're done. 5115234353Sdim NamedDecl *Def = 0; 5116234353Sdim if (!T->isIncompleteType(&Def)) { 5117234353Sdim // If we know about the definition but it is not visible, complain. 5118263508Sdim if (!Diagnoser.Suppressed && Def && !LookupResult::isVisible(*this, Def)) { 5119234353Sdim // Suppress this error outside of a SFINAE context if we've already 5120239462Sdim // emitted the error once for this type. There's no usefulness in 5121234353Sdim // repeating the diagnostic. 5122234353Sdim // FIXME: Add a Fix-It that imports the corresponding module or includes 5123234353Sdim // the header. 5124249423Sdim Module *Owner = Def->getOwningModule(); 5125249423Sdim Diag(Loc, diag::err_module_private_definition) 5126249423Sdim << T << Owner->getFullModuleName(); 5127249423Sdim Diag(Def->getLocation(), diag::note_previous_definition); 5128249423Sdim 5129249423Sdim if (!isSFINAEContext()) { 5130249423Sdim // Recover by implicitly importing this module. 5131249423Sdim createImplicitModuleImport(Loc, Owner); 5132234353Sdim } 5133234353Sdim } 5134239462Sdim 5135193326Sed return false; 5136234353Sdim } 5137193326Sed 5138263508Sdim // FIXME: If there's an unimported definition of this type in a module (for 5139263508Sdim // instance, because we forward declared it, then imported the definition), 5140263508Sdim // import that definition now. 5141263508Sdim // FIXME: What about other cases where an import extends a redeclaration 5142263508Sdim // chain for a declaration that can be accessed through a mechanism other 5143263508Sdim // than name lookup (eg, referenced in a template, or a variable whose type 5144263508Sdim // could be completed by the module)? 5145263508Sdim 5146234353Sdim const TagType *Tag = T->getAs<TagType>(); 5147234353Sdim const ObjCInterfaceType *IFace = 0; 5148239462Sdim 5149234353Sdim if (Tag) { 5150234353Sdim // Avoid diagnosing invalid decls as incomplete. 5151234353Sdim if (Tag->getDecl()->isInvalidDecl()) 5152234353Sdim return true; 5153234353Sdim 5154234353Sdim // Give the external AST source a chance to complete the type. 5155234353Sdim if (Tag->getDecl()->hasExternalLexicalStorage()) { 5156234353Sdim Context.getExternalSource()->CompleteType(Tag->getDecl()); 5157234353Sdim if (!Tag->isIncompleteType()) 5158234353Sdim return false; 5159234353Sdim } 5160234353Sdim } 5161234353Sdim else if ((IFace = T->getAs<ObjCInterfaceType>())) { 5162234353Sdim // Avoid diagnosing invalid decls as incomplete. 5163234353Sdim if (IFace->getDecl()->isInvalidDecl()) 5164234353Sdim return true; 5165239462Sdim 5166234353Sdim // Give the external AST source a chance to complete the type. 5167234353Sdim if (IFace->getDecl()->hasExternalLexicalStorage()) { 5168234353Sdim Context.getExternalSource()->CompleteType(IFace->getDecl()); 5169234353Sdim if (!IFace->isIncompleteType()) 5170234353Sdim return false; 5171234353Sdim } 5172234353Sdim } 5173239462Sdim 5174193326Sed // If we have a class template specialization or a class member of a 5175198954Srdivacky // class template specialization, or an array with known size of such, 5176198954Srdivacky // try to instantiate it. 5177198954Srdivacky QualType MaybeTemplate = T; 5178235864Sdim while (const ConstantArrayType *Array 5179235864Sdim = Context.getAsConstantArrayType(MaybeTemplate)) 5180198954Srdivacky MaybeTemplate = Array->getElementType(); 5181198954Srdivacky if (const RecordType *Record = MaybeTemplate->getAs<RecordType>()) { 5182193326Sed if (ClassTemplateSpecializationDecl *ClassTemplateSpec 5183193326Sed = dyn_cast<ClassTemplateSpecializationDecl>(Record->getDecl())) { 5184198893Srdivacky if (ClassTemplateSpec->getSpecializationKind() == TSK_Undeclared) 5185198893Srdivacky return InstantiateClassTemplateSpecialization(Loc, ClassTemplateSpec, 5186198092Srdivacky TSK_ImplicitInstantiation, 5187239462Sdim /*Complain=*/!Diagnoser.Suppressed); 5188198092Srdivacky } else if (CXXRecordDecl *Rec 5189193326Sed = dyn_cast<CXXRecordDecl>(Record->getDecl())) { 5190234353Sdim CXXRecordDecl *Pattern = Rec->getInstantiatedFromMemberClass(); 5191234353Sdim if (!Rec->isBeingDefined() && Pattern) { 5192234353Sdim MemberSpecializationInfo *MSI = Rec->getMemberSpecializationInfo(); 5193234353Sdim assert(MSI && "Missing member specialization information?"); 5194198092Srdivacky // This record was instantiated from a class within a template. 5195234353Sdim if (MSI->getTemplateSpecializationKind() != TSK_ExplicitSpecialization) 5196198092Srdivacky return InstantiateClass(Loc, Rec, Pattern, 5197198092Srdivacky getTemplateInstantiationArgs(Rec), 5198198092Srdivacky TSK_ImplicitInstantiation, 5199239462Sdim /*Complain=*/!Diagnoser.Suppressed); 5200193326Sed } 5201193326Sed } 5202193326Sed } 5203193326Sed 5204239462Sdim if (Diagnoser.Suppressed) 5205198092Srdivacky return true; 5206239462Sdim 5207193326Sed // We have an incomplete type. Produce a diagnostic. 5208263508Sdim if (Ident___float128 && 5209263508Sdim T == Context.getTypeDeclType(Context.getFloat128StubType())) { 5210263508Sdim Diag(Loc, diag::err_typecheck_decl_incomplete_type___float128); 5211263508Sdim return true; 5212263508Sdim } 5213263508Sdim 5214239462Sdim Diagnoser.diagnose(*this, Loc, T); 5215239462Sdim 5216193326Sed // If the type was a forward declaration of a class/struct/union 5217206084Srdivacky // type, produce a note. 5218193326Sed if (Tag && !Tag->getDecl()->isInvalidDecl()) 5219198092Srdivacky Diag(Tag->getDecl()->getLocation(), 5220193326Sed Tag->isBeingDefined() ? diag::note_type_being_defined 5221193326Sed : diag::note_forward_declaration) 5222234353Sdim << QualType(Tag, 0); 5223239462Sdim 5224234353Sdim // If the Objective-C class was a forward declaration, produce a note. 5225234353Sdim if (IFace && !IFace->getDecl()->isInvalidDecl()) 5226234353Sdim Diag(IFace->getDecl()->getLocation(), diag::note_forward_class); 5227193326Sed 5228263508Sdim // If we have external information that we can use to suggest a fix, 5229263508Sdim // produce a note. 5230263508Sdim if (ExternalSource) 5231263508Sdim ExternalSource->MaybeDiagnoseMissingCompleteType(Loc, T); 5232263508Sdim 5233193326Sed return true; 5234193326Sed} 5235193326Sed 5236206084Srdivackybool Sema::RequireCompleteType(SourceLocation Loc, QualType T, 5237206084Srdivacky unsigned DiagID) { 5238239462Sdim TypeDiagnoserDiag Diagnoser(DiagID); 5239239462Sdim return RequireCompleteType(Loc, T, Diagnoser); 5240206084Srdivacky} 5241206084Srdivacky 5242243830Sdim/// \brief Get diagnostic %select index for tag kind for 5243243830Sdim/// literal type diagnostic message. 5244243830Sdim/// WARNING: Indexes apply to particular diagnostics only! 5245243830Sdim/// 5246243830Sdim/// \returns diagnostic %select index. 5247243830Sdimstatic unsigned getLiteralDiagFromTagKind(TagTypeKind Tag) { 5248243830Sdim switch (Tag) { 5249243830Sdim case TTK_Struct: return 0; 5250243830Sdim case TTK_Interface: return 1; 5251243830Sdim case TTK_Class: return 2; 5252243830Sdim default: llvm_unreachable("Invalid tag kind for literal type diagnostic!"); 5253243830Sdim } 5254243830Sdim} 5255243830Sdim 5256226633Sdim/// @brief Ensure that the type T is a literal type. 5257226633Sdim/// 5258226633Sdim/// This routine checks whether the type @p T is a literal type. If @p T is an 5259226633Sdim/// incomplete type, an attempt is made to complete it. If @p T is a literal 5260226633Sdim/// type, or @p AllowIncompleteType is true and @p T is an incomplete type, 5261226633Sdim/// returns false. Otherwise, this routine issues the diagnostic @p PD (giving 5262226633Sdim/// it the type @p T), along with notes explaining why the type is not a 5263226633Sdim/// literal type, and returns true. 5264226633Sdim/// 5265226633Sdim/// @param Loc The location in the source that the non-literal type 5266226633Sdim/// diagnostic should refer to. 5267226633Sdim/// 5268226633Sdim/// @param T The type that this routine is examining for literalness. 5269226633Sdim/// 5270239462Sdim/// @param Diagnoser Emits a diagnostic if T is not a literal type. 5271226633Sdim/// 5272226633Sdim/// @returns @c true if @p T is not a literal type and a diagnostic was emitted, 5273226633Sdim/// @c false otherwise. 5274226633Sdimbool Sema::RequireLiteralType(SourceLocation Loc, QualType T, 5275239462Sdim TypeDiagnoser &Diagnoser) { 5276226633Sdim assert(!T->isDependentType() && "type should not be dependent"); 5277226633Sdim 5278234353Sdim QualType ElemType = Context.getBaseElementType(T); 5279234353Sdim RequireCompleteType(Loc, ElemType, 0); 5280234353Sdim 5281251662Sdim if (T->isLiteralType(Context)) 5282226633Sdim return false; 5283226633Sdim 5284239462Sdim if (Diagnoser.Suppressed) 5285226633Sdim return true; 5286226633Sdim 5287239462Sdim Diagnoser.diagnose(*this, Loc, T); 5288226633Sdim 5289226633Sdim if (T->isVariableArrayType()) 5290226633Sdim return true; 5291226633Sdim 5292234353Sdim const RecordType *RT = ElemType->getAs<RecordType>(); 5293226633Sdim if (!RT) 5294226633Sdim return true; 5295226633Sdim 5296226633Sdim const CXXRecordDecl *RD = cast<CXXRecordDecl>(RT->getDecl()); 5297226633Sdim 5298239462Sdim // A partially-defined class type can't be a literal type, because a literal 5299239462Sdim // class type must have a trivial destructor (which can't be checked until 5300239462Sdim // the class definition is complete). 5301239462Sdim if (!RD->isCompleteDefinition()) { 5302239462Sdim RequireCompleteType(Loc, ElemType, diag::note_non_literal_incomplete, T); 5303234353Sdim return true; 5304239462Sdim } 5305234353Sdim 5306226633Sdim // If the class has virtual base classes, then it's not an aggregate, and 5307234353Sdim // cannot have any constexpr constructors or a trivial default constructor, 5308234353Sdim // so is non-literal. This is better to diagnose than the resulting absence 5309234353Sdim // of constexpr constructors. 5310226633Sdim if (RD->getNumVBases()) { 5311226633Sdim Diag(RD->getLocation(), diag::note_non_literal_virtual_base) 5312243830Sdim << getLiteralDiagFromTagKind(RD->getTagKind()) << RD->getNumVBases(); 5313226633Sdim for (CXXRecordDecl::base_class_const_iterator I = RD->vbases_begin(), 5314226633Sdim E = RD->vbases_end(); I != E; ++I) 5315234353Sdim Diag(I->getLocStart(), 5316226633Sdim diag::note_constexpr_virtual_base_here) << I->getSourceRange(); 5317234353Sdim } else if (!RD->isAggregate() && !RD->hasConstexprNonCopyMoveConstructor() && 5318234353Sdim !RD->hasTrivialDefaultConstructor()) { 5319226633Sdim Diag(RD->getLocation(), diag::note_non_literal_no_constexpr_ctors) << RD; 5320226633Sdim } else if (RD->hasNonLiteralTypeFieldsOrBases()) { 5321226633Sdim for (CXXRecordDecl::base_class_const_iterator I = RD->bases_begin(), 5322226633Sdim E = RD->bases_end(); I != E; ++I) { 5323251662Sdim if (!I->getType()->isLiteralType(Context)) { 5324234353Sdim Diag(I->getLocStart(), 5325226633Sdim diag::note_non_literal_base_class) 5326226633Sdim << RD << I->getType() << I->getSourceRange(); 5327226633Sdim return true; 5328226633Sdim } 5329226633Sdim } 5330226633Sdim for (CXXRecordDecl::field_iterator I = RD->field_begin(), 5331226633Sdim E = RD->field_end(); I != E; ++I) { 5332251662Sdim if (!I->getType()->isLiteralType(Context) || 5333239462Sdim I->getType().isVolatileQualified()) { 5334239462Sdim Diag(I->getLocation(), diag::note_non_literal_field) 5335239462Sdim << RD << *I << I->getType() 5336239462Sdim << I->getType().isVolatileQualified(); 5337226633Sdim return true; 5338226633Sdim } 5339226633Sdim } 5340226633Sdim } else if (!RD->hasTrivialDestructor()) { 5341226633Sdim // All fields and bases are of literal types, so have trivial destructors. 5342226633Sdim // If this class's destructor is non-trivial it must be user-declared. 5343226633Sdim CXXDestructorDecl *Dtor = RD->getDestructor(); 5344226633Sdim assert(Dtor && "class has literal fields and bases but no dtor?"); 5345226633Sdim if (!Dtor) 5346226633Sdim return true; 5347226633Sdim 5348226633Sdim Diag(Dtor->getLocation(), Dtor->isUserProvided() ? 5349226633Sdim diag::note_non_literal_user_provided_dtor : 5350226633Sdim diag::note_non_literal_nontrivial_dtor) << RD; 5351249423Sdim if (!Dtor->isUserProvided()) 5352249423Sdim SpecialMemberIsTrivial(Dtor, CXXDestructor, /*Diagnose*/true); 5353226633Sdim } 5354226633Sdim 5355226633Sdim return true; 5356226633Sdim} 5357226633Sdim 5358239462Sdimbool Sema::RequireLiteralType(SourceLocation Loc, QualType T, unsigned DiagID) { 5359239462Sdim TypeDiagnoserDiag Diagnoser(DiagID); 5360239462Sdim return RequireLiteralType(Loc, T, Diagnoser); 5361239462Sdim} 5362239462Sdim 5363208600Srdivacky/// \brief Retrieve a version of the type 'T' that is elaborated by Keyword 5364208600Srdivacky/// and qualified by the nested-name-specifier contained in SS. 5365208600SrdivackyQualType Sema::getElaboratedType(ElaboratedTypeKeyword Keyword, 5366208600Srdivacky const CXXScopeSpec &SS, QualType T) { 5367208600Srdivacky if (T.isNull()) 5368193326Sed return T; 5369208600Srdivacky NestedNameSpecifier *NNS; 5370208600Srdivacky if (SS.isValid()) 5371208600Srdivacky NNS = static_cast<NestedNameSpecifier *>(SS.getScopeRep()); 5372208600Srdivacky else { 5373208600Srdivacky if (Keyword == ETK_None) 5374208600Srdivacky return T; 5375208600Srdivacky NNS = 0; 5376208600Srdivacky } 5377208600Srdivacky return Context.getElaboratedType(Keyword, NNS, T); 5378193326Sed} 5379195341Sed 5380218893SdimQualType Sema::BuildTypeofExprType(Expr *E, SourceLocation Loc) { 5381221345Sdim ExprResult ER = CheckPlaceholderExpr(E); 5382218893Sdim if (ER.isInvalid()) return QualType(); 5383218893Sdim E = ER.take(); 5384218893Sdim 5385218893Sdim if (!E->isTypeDependent()) { 5386218893Sdim QualType T = E->getType(); 5387218893Sdim if (const TagType *TT = T->getAs<TagType>()) 5388218893Sdim DiagnoseUseOfDecl(TT->getDecl(), E->getExprLoc()); 5389201361Srdivacky } 5390195341Sed return Context.getTypeOfExprType(E); 5391195341Sed} 5392195341Sed 5393234353Sdim/// getDecltypeForExpr - Given an expr, will return the decltype for 5394234353Sdim/// that expression, according to the rules in C++11 5395234353Sdim/// [dcl.type.simple]p4 and C++11 [expr.lambda.prim]p18. 5396234353Sdimstatic QualType getDecltypeForExpr(Sema &S, Expr *E) { 5397234353Sdim if (E->isTypeDependent()) 5398234353Sdim return S.Context.DependentTy; 5399234353Sdim 5400234353Sdim // C++11 [dcl.type.simple]p4: 5401234353Sdim // The type denoted by decltype(e) is defined as follows: 5402234353Sdim // 5403234353Sdim // - if e is an unparenthesized id-expression or an unparenthesized class 5404239462Sdim // member access (5.2.5), decltype(e) is the type of the entity named 5405239462Sdim // by e. If there is no such entity, or if e names a set of overloaded 5406234353Sdim // functions, the program is ill-formed; 5407243830Sdim // 5408243830Sdim // We apply the same rules for Objective-C ivar and property references. 5409234353Sdim if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(E)) { 5410234353Sdim if (const ValueDecl *VD = dyn_cast<ValueDecl>(DRE->getDecl())) 5411234353Sdim return VD->getType(); 5412243830Sdim } else if (const MemberExpr *ME = dyn_cast<MemberExpr>(E)) { 5413234353Sdim if (const FieldDecl *FD = dyn_cast<FieldDecl>(ME->getMemberDecl())) 5414234353Sdim return FD->getType(); 5415243830Sdim } else if (const ObjCIvarRefExpr *IR = dyn_cast<ObjCIvarRefExpr>(E)) { 5416243830Sdim return IR->getDecl()->getType(); 5417243830Sdim } else if (const ObjCPropertyRefExpr *PR = dyn_cast<ObjCPropertyRefExpr>(E)) { 5418243830Sdim if (PR->isExplicitProperty()) 5419243830Sdim return PR->getExplicitProperty()->getType(); 5420234353Sdim } 5421243830Sdim 5422234353Sdim // C++11 [expr.lambda.prim]p18: 5423234353Sdim // Every occurrence of decltype((x)) where x is a possibly 5424234353Sdim // parenthesized id-expression that names an entity of automatic 5425234353Sdim // storage duration is treated as if x were transformed into an 5426234353Sdim // access to a corresponding data member of the closure type that 5427234353Sdim // would have been declared if x were an odr-use of the denoted 5428234353Sdim // entity. 5429234353Sdim using namespace sema; 5430234353Sdim if (S.getCurLambda()) { 5431234353Sdim if (isa<ParenExpr>(E)) { 5432234353Sdim if (DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(E->IgnoreParens())) { 5433234353Sdim if (VarDecl *Var = dyn_cast<VarDecl>(DRE->getDecl())) { 5434234353Sdim QualType T = S.getCapturedDeclRefType(Var, DRE->getLocation()); 5435234353Sdim if (!T.isNull()) 5436234353Sdim return S.Context.getLValueReferenceType(T); 5437234353Sdim } 5438234353Sdim } 5439234353Sdim } 5440234353Sdim } 5441234353Sdim 5442234353Sdim 5443234353Sdim // C++11 [dcl.type.simple]p4: 5444234353Sdim // [...] 5445234353Sdim QualType T = E->getType(); 5446234353Sdim switch (E->getValueKind()) { 5447239462Sdim // - otherwise, if e is an xvalue, decltype(e) is T&&, where T is the 5448234353Sdim // type of e; 5449234353Sdim case VK_XValue: T = S.Context.getRValueReferenceType(T); break; 5450239462Sdim // - otherwise, if e is an lvalue, decltype(e) is T&, where T is the 5451234353Sdim // type of e; 5452234353Sdim case VK_LValue: T = S.Context.getLValueReferenceType(T); break; 5453234353Sdim // - otherwise, decltype(e) is the type of e. 5454234353Sdim case VK_RValue: break; 5455234353Sdim } 5456239462Sdim 5457234353Sdim return T; 5458234353Sdim} 5459234353Sdim 5460218893SdimQualType Sema::BuildDecltypeType(Expr *E, SourceLocation Loc) { 5461221345Sdim ExprResult ER = CheckPlaceholderExpr(E); 5462218893Sdim if (ER.isInvalid()) return QualType(); 5463218893Sdim E = ER.take(); 5464239462Sdim 5465234353Sdim return Context.getDecltypeType(E, getDecltypeForExpr(*this, E)); 5466195341Sed} 5467223017Sdim 5468223017SdimQualType Sema::BuildUnaryTransformType(QualType BaseType, 5469223017Sdim UnaryTransformType::UTTKind UKind, 5470223017Sdim SourceLocation Loc) { 5471223017Sdim switch (UKind) { 5472223017Sdim case UnaryTransformType::EnumUnderlyingType: 5473223017Sdim if (!BaseType->isDependentType() && !BaseType->isEnumeralType()) { 5474223017Sdim Diag(Loc, diag::err_only_enums_have_underlying_types); 5475223017Sdim return QualType(); 5476223017Sdim } else { 5477223017Sdim QualType Underlying = BaseType; 5478223017Sdim if (!BaseType->isDependentType()) { 5479223017Sdim EnumDecl *ED = BaseType->getAs<EnumType>()->getDecl(); 5480223017Sdim assert(ED && "EnumType has no EnumDecl"); 5481223017Sdim DiagnoseUseOfDecl(ED, Loc); 5482223017Sdim Underlying = ED->getIntegerType(); 5483223017Sdim } 5484223017Sdim assert(!Underlying.isNull()); 5485223017Sdim return Context.getUnaryTransformType(BaseType, Underlying, 5486223017Sdim UnaryTransformType::EnumUnderlyingType); 5487223017Sdim } 5488223017Sdim } 5489223017Sdim llvm_unreachable("unknown unary transform type"); 5490223017Sdim} 5491226633Sdim 5492226633SdimQualType Sema::BuildAtomicType(QualType T, SourceLocation Loc) { 5493226633Sdim if (!T->isDependentType()) { 5494234353Sdim // FIXME: It isn't entirely clear whether incomplete atomic types 5495234353Sdim // are allowed or not; for simplicity, ban them for the moment. 5496239462Sdim if (RequireCompleteType(Loc, T, diag::err_atomic_specifier_bad_type, 0)) 5497234353Sdim return QualType(); 5498234353Sdim 5499226633Sdim int DisallowedKind = -1; 5500234353Sdim if (T->isArrayType()) 5501226633Sdim DisallowedKind = 1; 5502226633Sdim else if (T->isFunctionType()) 5503226633Sdim DisallowedKind = 2; 5504226633Sdim else if (T->isReferenceType()) 5505226633Sdim DisallowedKind = 3; 5506226633Sdim else if (T->isAtomicType()) 5507226633Sdim DisallowedKind = 4; 5508226633Sdim else if (T.hasQualifiers()) 5509226633Sdim DisallowedKind = 5; 5510226633Sdim else if (!T.isTriviallyCopyableType(Context)) 5511226633Sdim // Some other non-trivially-copyable type (probably a C++ class) 5512226633Sdim DisallowedKind = 6; 5513226633Sdim 5514226633Sdim if (DisallowedKind != -1) { 5515226633Sdim Diag(Loc, diag::err_atomic_specifier_bad_type) << DisallowedKind << T; 5516226633Sdim return QualType(); 5517226633Sdim } 5518226633Sdim 5519226633Sdim // FIXME: Do we need any handling for ARC here? 5520226633Sdim } 5521226633Sdim 5522226633Sdim // Build the pointer type. 5523226633Sdim return Context.getAtomicType(T); 5524226633Sdim} 5525