| // 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. |