1// Copyright 2011 the V8 project authors. All rights reserved.
2// Redistribution and use in source and binary forms, with or without
3// modification, are permitted provided that the following conditions are
4// met:
5//
6//     * Redistributions of source code must retain the above copyright
7//       notice, this list of conditions and the following disclaimer.
8//     * Redistributions in binary form must reproduce the above
9//       copyright notice, this list of conditions and the following
10//       disclaimer in the documentation and/or other materials provided
11//       with the distribution.
12//     * Neither the name of Google Inc. nor the names of its
13//       contributors may be used to endorse or promote products derived
14//       from this software without specific prior written permission.
15//
16// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
18// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
19// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
20// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27
28// Test proper handling of keywords, future reserved words and
29// future reserved words in strict mode as specific by 7.6.1 and 7.6.2
30// in ECMA-262.
31
32// This code is based on:
33// http://trac.webkit.org/export/89109/trunk/LayoutTests/fast/js/script-tests/keywords-and-reserved_words.js
34
35function isKeyword(x)
36{
37  try {
38    eval("var " + x + ";");
39  } catch(e) {
40    return true;
41  }
42
43  return false;
44}
45
46function isStrictKeyword(x)
47{
48  try {
49    eval("'use strict'; var "+x+";");
50  } catch(e) {
51    return true;
52  }
53
54  return false;
55}
56
57function classifyIdentifier(x)
58{
59  if (isKeyword(x)) {
60    // All non-strict keywords are also keywords in strict code.
61    if (!isStrictKeyword(x)) {
62      return "ERROR";
63    }
64    return "keyword";
65  }
66
67  // Check for strict mode future reserved words.
68  if (isStrictKeyword(x)) {
69    return "strict";
70  }
71
72  return "identifier";
73}
74
75function testKeyword(word) {
76  // Classify word
77  assertEquals("keyword", classifyIdentifier(word));
78
79  // Simple use of a keyword
80  assertThrows("var " + word + " = 1;", SyntaxError);
81  if (word != "this") {
82    assertThrows("typeof (" + word + ");", SyntaxError);
83  }
84
85  // object literal properties
86  eval("var x = { " + word + " : 42 };");
87  eval("var x = { get " + word + " () {} };");
88  eval("var x = { set " + word + " (value) {} };");
89
90  // object literal with string literal property names
91  eval("var x = { '" + word + "' : 42 };");
92  eval("var x = { get '" + word + "' () { } };");
93  eval("var x = { set '" + word + "' (value) { } };");
94
95  // Function names and arguments
96  assertThrows("function " + word + " () { }", SyntaxError);
97  assertThrows("function foo (" + word + ") {}", SyntaxError);
98  assertThrows("function foo (a, " + word + ") { }", SyntaxError);
99  assertThrows("function foo (" + word + ", a) { }", SyntaxError);
100  assertThrows("function foo (a, " + word + ", b) { }", SyntaxError);
101  assertThrows("var foo = function (" + word + ") { }", SyntaxError);
102
103  // setter parameter
104  assertThrows("var x = { set foo(" + word + ") { } };", SyntaxError);
105}
106
107// Not keywords - these are all just identifiers.
108var identifiers = [
109  "x",            "keyword",
110  "id",           "strict",
111  "identifier",   "use",
112  // The following are reserved in ES3 but not in ES5.
113  "abstract",     "int",
114  "boolean",      "long",
115  "byte",         "native",
116  "char",         "short",
117  "double",       "synchronized",
118  "final",        "throws",
119  "float",        "transient",
120  "goto",         "volatile" ];
121
122for (var i = 0; i < identifiers.length; i++) {
123  assertEquals ("identifier", classifyIdentifier(identifiers[i]));
124}
125
126// 7.6.1.1 Keywords
127var keywords = [
128  "break",        "in",
129  "case",         "instanceof",
130  "catch",        "new",
131  "continue",     "return",
132  "debugger",     "switch",
133  "default",      "this",
134  "delete",       "throw",
135  "do",           "try",
136  "else",         "typeof",
137  "finally",      "var",
138  "for",          "void",
139  "function",     "while",
140  "if",           "with",
141  // In ES5 "const" is a "future reserved word" but we treat it as a keyword.
142  "const" ];
143
144for (var i = 0; i < keywords.length; i++) {
145  testKeyword(keywords[i]);
146}
147
148// 7.6.1.2 Future Reserved Words (without "const")
149var future_reserved_words = [
150  "class",
151  "enum",
152  "export",
153  "extends",
154  "import",
155  "super" ];
156
157for (var i = 0; i < future_reserved_words.length; i++) {
158  testKeyword(future_reserved_words[i]);
159}
160
161// 7.6.1.2 Future Reserved Words, in strict mode only.
162var future_strict_reserved_words = [
163  "implements",
164  "interface",
165  "let",
166  "package",
167  "private",
168  "protected",
169  "public",
170  "static",
171  "yield" ];
172
173for (var i = 0; i < future_strict_reserved_words.length; i++) {
174  assertEquals ("strict", classifyIdentifier(future_strict_reserved_words[i]));
175}
176
177// More strict mode specific tests can be found in mjsunit/strict-mode.js.
178