TemplateLiteral.java revision 1786:80120e9b3273 
1/*
2 * Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.  Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26package jdk.nashorn.internal.ir;
27
28import java.util.Collections;
29import java.util.List;
30import jdk.nashorn.internal.codegen.types.Type;
31import jdk.nashorn.internal.ir.visitor.NodeVisitor;
32
33/**
34 * Represents ES6 template string expression. Note that this Node class is used
35 * only in "parse only" mode. In evaluation mode, Parser directly folds template
36 * literal as string concatenation. Parser API uses this node to represent ES6
37 * template literals "as is" rather than as a String concatenation.
38 */
39public final class TemplateLiteral extends Expression {
40    private static final long serialVersionUID = 1L;
41    private final List<Expression> exprs;
42
43    public TemplateLiteral(final List<Expression> exprs) {
44        super(exprs.get(0).getToken(), exprs.get(exprs.size() - 1).finish);
45        this.exprs = exprs;
46    }
47
48    @Override
49    public Type getType() {
50        return Type.STRING;
51    }
52
53    @Override
54    public Node accept(final NodeVisitor<? extends LexicalContext> visitor) {
55        if (visitor.enterTemplateLiteral(this)) {
56            return visitor.leaveTemplateLiteral(this);
57        }
58
59        return this;
60    }
61
62    @Override
63    public void toString(final StringBuilder sb, final boolean printType) {
64        for (final Expression expr : exprs) {
65            sb.append(expr);
66        }
67    }
68
69    /**
70     * The list of expressions that are part of this template literal.
71     *
72     * @return the list of expressions that are part of this template literal.
73     */
74    public List<Expression> getExpressions() {
75        return Collections.unmodifiableList(exprs);
76    }
77}