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| 1 // Copyright 2008 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 // According to section 7.1 of EcmaScript-262 format control characters |
| 29 // should be removed before parsing. We're following the discussion at |
| 30 // https://bugs.webkit.org/show_bug.cgi?id=4931 in only removing the BOM. |
| 31 // See also https://bugzilla.mozilla.org/show_bug.cgi?id=274152. |
| 32 |
| 33 // Ignores BOM (and only BOM) in string literals. |
| 34 var format_controls = |
| 35 eval('"\uFEFF\u200F\u200E\u00AD\u2062\u200D\u200C\u200B"'); |
| 36 assertEquals('\u200F\u200E\u00AD\u2062\u200D\u200C\u200B', |
| 37 format_controls); |
| 38 |
| 39 // Ignores BOM in identifiers. |
| 40 eval('var x\uFEFFy = 7'); |
| 41 assertEquals(7, xy); |
| 42 |
| 43 // Doesn't ignore non-BOM format control characters. |
| 44 assertThrows('var y\u200Fx = 7'); |
| 45 assertThrows('var y\u200Ex = 7'); |
| 46 assertThrows('var y\u20ADx = 7'); |
| 47 assertThrows('var y\u2062x = 7'); |
| 48 assertThrows('var y\u200Dx = 7'); |
| 49 assertThrows('var y\u200Cx = 7'); |
| 50 assertThrows('var y\u200Bx = 7'); |
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