/* * Copyright 1993, 1995 Christopher Seiwald. * * This file is part of Jam - see jam.c for Copyright information. */ /* * scan.h - the jam yacc scanner * * External functions: * * yyerror( char *s ) - print a parsing error message * yyfparse( char *s ) - scan include file s * yylex() - parse the next token, returning its type * yymode() - adjust lexicon of scanner * yyparse() - declaration for yacc parser * yyanyerrors() - indicate if any parsing errors occured * * The yymode() function is for the parser to adjust the lexicon of the * scanner. Aside from normal keyword scanning, there is a mode to * handle action strings (look only for the closing }) and a mode to * ignore most keywords when looking for a punctuation keyword. This * allows non-punctuation keywords to be used in lists without quoting. * * 11/04/02 (seiwald) - const-ing for string literals */ /* * YYSTYPE - value of a lexical token */ # define YYSTYPE YYSYMBOL typedef struct _YYSTYPE { int type; const char *string; PARSE *parse; LIST *list; int number; } YYSTYPE; extern YYSTYPE yylval; void yymode( int n ); void yyerror( const char *s ); int yyanyerrors(); void yyfparse( const char *s ); int yyline(); int yylex(); int yyparse(); # define SCAN_NORMAL 0 /* normal parsing */ # define SCAN_STRING 1 /* look only for matching } */ # define SCAN_PUNCT 2 /* only punctuation keywords */