55 lines
2.6 KiB
JavaScript
55 lines
2.6 KiB
JavaScript
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// Copyright 2011 the V8 project authors. All rights reserved.
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following
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// disclaimer in the documentation and/or other materials provided
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// with the distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived
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// from this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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// Don't allow malformed unicode escape sequences in identifiers.
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// In strings and regexps we currently allow malformed unicode escape
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// sequences without throwing a SyntaxError. Instead "\u22gk" would
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// treat the "\u" as an identity escape, and evaluate to "u22gk".
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// Due to code sharing, we did the same in identifiers. This should
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// no longer be the case.
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// See: http://code.google.com/p/v8/issues/detail?id=1620
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assertThrows("var \\u\\u\\u = 42;");
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assertThrows("var \\u41 = 42;");
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assertThrows("var \\u123 = 42;");
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eval("var \\u1234 = 42;");
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assertEquals(42, eval("\u1234"));
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assertThrows("var uuu = 42; var x = \\u\\u\\u");
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// Regressions introduced and fixed again while fixing the above.
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// Handle 0xFFFD correctly (it's a valid value, and shouldn't be used
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// to mark an error).
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assertEquals(0xFFFD, "\uFFFD".charCodeAt(0));
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// Handle unicode escapes in regexp flags correctly.
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assertThrows("/x/g\\uim", SyntaxError);
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assertThrows("/x/g\\u2im", SyntaxError);
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assertThrows("/x/g\\u22im", SyntaxError);
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assertThrows("/x/g\\u222im", SyntaxError);
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assertThrows("/x/g\\\\u2222im", SyntaxError);
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