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// Copyright 2011 the V8 project authors. All rights reserved.
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following
// disclaimer in the documentation and/or other materials provided
// with the distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived
// from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
// Test proper handling of keywords, future reserved words and
// future reserved words in strict mode as specific by 7.6.1 and 7.6.2
// in ECMA-262.
// This code is based on:
// http://trac.webkit.org/export/89109/trunk/LayoutTests/fast/js/script-tests/keywords-and-reserved_words.js
function isKeyword(x)
{
try {
eval("var " + x + ";");
} catch(e) {
return true;
}
return false;
}
function isStrictKeyword(x)
{
try {
eval("'use strict'; var "+x+";");
} catch(e) {
return true;
}
return false;
}
function classifyIdentifier(x)
{
if (isKeyword(x)) {
// All non-strict keywords are also keywords in strict code.
if (!isStrictKeyword(x)) {
return "ERROR";
}
return "keyword";
}
// Check for strict mode future reserved words.
if (isStrictKeyword(x)) {
return "strict";
}
return "identifier";
}
function testKeyword(word) {
// Classify word
assertEquals("keyword", classifyIdentifier(word));
// Simple use of a keyword
assertThrows("var " + word + " = 1;", SyntaxError);
if (word != "this") {
assertThrows("typeof (" + word + ");", SyntaxError);
}
// object literal properties
eval("var x = { " + word + " : 42 };");
eval("var x = { get " + word + " () {} };");
eval("var x = { set " + word + " (value) {} };");
// object literal with string literal property names
eval("var x = { '" + word + "' : 42 };");
eval("var x = { get '" + word + "' () { } };");
eval("var x = { set '" + word + "' (value) { } };");
// Function names and arguments
assertThrows("function " + word + " () { }", SyntaxError);
assertThrows("function foo (" + word + ") {}", SyntaxError);
assertThrows("function foo (a, " + word + ") { }", SyntaxError);
assertThrows("function foo (" + word + ", a) { }", SyntaxError);
assertThrows("function foo (a, " + word + ", b) { }", SyntaxError);
assertThrows("var foo = function (" + word + ") { }", SyntaxError);
// setter parameter
assertThrows("var x = { set foo(" + word + ") { } };", SyntaxError);
}
// Not keywords - these are all just identifiers.
var identifiers = [
"x", "keyword",
"id", "strict",
"identifier", "use",
// The following are reserved in ES3 but not in ES5.
"abstract", "int",
"boolean", "long",
"byte", "native",
"char", "short",
"double", "synchronized",
"final", "throws",
"float", "transient",
"goto", "volatile" ];
for (var i = 0; i < identifiers.length; i++) {
assertEquals ("identifier", classifyIdentifier(identifiers[i]));
}
// 7.6.1.1 Keywords
var keywords = [
"break", "in",
"case", "instanceof",
"catch", "new",
"continue", "return",
"debugger", "switch",
"default", "this",
"delete", "throw",
"do", "try",
"else", "typeof",
"finally", "var",
"for", "void",
"function", "while",
"if", "with",
// In ES5 "const" is a "future reserved word" but we treat it as a keyword.
"const" ];
for (var i = 0; i < keywords.length; i++) {
testKeyword(keywords[i]);
}
// 7.6.1.2 Future Reserved Words (without "const")
var future_reserved_words = [
"class",
"enum",
"export",
"extends",
"import",
"super" ];
for (var i = 0; i < future_reserved_words.length; i++) {
testKeyword(future_reserved_words[i]);
}
// 7.6.1.2 Future Reserved Words, in strict mode only.
var future_strict_reserved_words = [
"implements",
"interface",
"let",
"package",
"private",
"protected",
"public",
"static",
"yield" ];
for (var i = 0; i < future_strict_reserved_words.length; i++) {
assertEquals ("strict", classifyIdentifier(future_strict_reserved_words[i]));
}
// More strict mode specific tests can be found in mjsunit/strict-mode.js.
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