├── .gitignore ├── .jshintrc ├── .travis.yml ├── LICENSE.BSD ├── README.md ├── lib ├── ast.js ├── code.js ├── keyword.js └── utils.js ├── package.json ├── test ├── ast.coffee ├── code.coffee └── keyword.coffee └── tools └── generate-identifier-regex.js /.gitignore: -------------------------------------------------------------------------------- 1 | node_modules 2 | -------------------------------------------------------------------------------- /.jshintrc: -------------------------------------------------------------------------------- 1 | { 2 | "curly": true, 3 | "eqeqeq": true, 4 | "immed": true, 5 | "eqnull": true, 6 | "latedef": true, 7 | "noarg": true, 8 | "noempty": true, 9 | "quotmark": "single", 10 | "undef": true, 11 | "unused": true, 12 | "strict": true, 13 | "trailing": true, 14 | 15 | "node": true 16 | } 17 | -------------------------------------------------------------------------------- /.travis.yml: -------------------------------------------------------------------------------- 1 | language: node_js 2 | node_js: 3 | - "0.10" 4 | - "0.11" 5 | 6 | matrix: 7 | allow_failures: 8 | - node_js: "0.11" 9 | -------------------------------------------------------------------------------- /LICENSE.BSD: -------------------------------------------------------------------------------- 1 | Redistribution and use in source and binary forms, with or without 2 | modification, are permitted provided that the following conditions are met: 3 | 4 | * Redistributions of source code must retain the above copyright 5 | notice, this list of conditions and the following disclaimer. 6 | * Redistributions in binary form must reproduce the above copyright 7 | notice, this list of conditions and the following disclaimer in the 8 | documentation and/or other materials provided with the distribution. 9 | 10 | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 11 | AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 12 | IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 13 | ARE DISCLAIMED. IN NO EVENT SHALL BE LIABLE FOR ANY 14 | DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 15 | (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 16 | LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 17 | ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 18 | (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 19 | THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 20 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # esutils [![Build Status](https://secure.travis-ci.org/estools/esutils.svg)](http://travis-ci.org/estools/esutils) 2 | esutils ([esutils](http://github.com/estools/esutils)) is 3 | utility box for ECMAScript language tools. 4 | 5 | ## API 6 | 7 | ## `ast` 8 | 9 | ### `ast.isExpression(node)` 10 | 11 | Returns `true` if `node` is an `Expression` as defined in ECMA262 edition 5.1 section 12 | [11](https://es5.github.io/#x11). 13 | 14 | ### `ast.isStatement(node)` 15 | 16 | Returns `true` if `node` is a `Statement` as defined in ECMA262 edition 5.1 section 17 | [12](https://es5.github.io/#x12). 18 | 19 | ### `ast.isIterationStatement(node)` 20 | 21 | Returns `true` if `node` is an `IterationStatement` as defined in ECMA262 edition 22 | 5.1 section [12.6](https://es5.github.io/#x12.6). 23 | 24 | ### `ast.isSourceElement(node)` 25 | 26 | Returns `true` if `node` is a `SourceElement` as defined in ECMA262 edition 5.1 27 | section [14](https://es5.github.io/#x14). 28 | 29 | ### `ast.trailingStatement(node)` 30 | 31 | Returns `Statement?` if `node` has trailing `Statement`. 32 | ```js 33 | if (cond) 34 | consequent; 35 | ``` 36 | When taking this `IfStatement`, returns `consequent;` statement. 37 | 38 | ### `ast.isProblematicIfStatement(node)` 39 | 40 | Returns `true` if `node` is a problematic `IfStatement`. If `node` is a problematic `IfStatement`, `node` cannot be represented as an one-to-one JavaScript code. 41 | ```js 42 | { 43 | type: 'IfStatement', 44 | consequent: { 45 | type: 'WithStatement', 46 | body: { 47 | type: 'IfStatement', 48 | consequent: {type: 'EmptyStatement'} 49 | } 50 | }, 51 | alternate: {type: 'EmptyStatement'} 52 | } 53 | ``` 54 | The above node cannot be represented as a JavaScript code, since the top level `else` alternate belongs to an inner `IfStatement`. 55 | 56 | 57 | ## `code` 58 | 59 | ### `code.isDecimalDigit(code)` 60 | 61 | Return `true` if provided code is decimal digit. 62 | 63 | ### `code.isHexDigit(code)` 64 | 65 | Return `true` if provided code is hexadecimal digit. 66 | 67 | ### `code.isOctalDigit(code)` 68 | 69 | Return `true` if provided code is octal digit. 70 | 71 | ### `code.isWhiteSpace(code)` 72 | 73 | Return `true` if provided code is white space. 74 | White space characters are formally defined in ECMA262. 75 | 76 | ### `code.isLineTerminator(code)` 77 | 78 | Return `true` if provided code is line terminator. 79 | Line terminator characters are formally defined in ECMA262. 80 | 81 | ### `code.isIdentifierStart(code)` 82 | 83 | Return `true` if provided code can be the first character of ECMA262 `Identifier`. 84 | They are formally defined in ECMA262. 85 | 86 | ### `code.isIdentifierPart(code)` 87 | 88 | Return `true` if provided code can be the trailing character of ECMA262 `Identifier`. 89 | They are formally defined in ECMA262. 90 | 91 | ## `keyword` 92 | 93 | ### `keyword.isKeywordES5(id, strict)` 94 | 95 | Returns `true` if provided identifier string is a Keyword or Future Reserved Word 96 | in ECMA262 edition 5.1. 97 | They are formally defined in ECMA262 sections 98 | [7.6.1.1](http://es5.github.io/#x7.6.1.1) and [7.6.1.2](http://es5.github.io/#x7.6.1.2), 99 | respectively. 100 | If the `strict` flag is truthy, this function additionally checks whether 101 | `id` is a `Keyword` or `FutureReservedWord` under strict mode. 102 | 103 | ### `keyword.isKeywordES6(id, strict)` 104 | 105 | Returns `true` if provided identifier string is a `Keyword` or `FutureReservedWord` 106 | in ECMA262 edition 6. 107 | They are formally defined in ECMA262 sections 108 | [11.6.2.1](http://ecma-international.org/ecma-262/6.0/#sec-keywords) and 109 | [11.6.2.2](http://ecma-international.org/ecma-262/6.0/#sec-future-reserved-words), 110 | respectively. 111 | If the `strict` flag is truthy, this function additionally checks whether 112 | `id` is a `Keyword` or `FutureReservedWord` under strict mode. 113 | 114 | ### `keyword.isReservedWordES5(id, strict)` 115 | 116 | Returns `true` if provided identifier string is a `ReservedWord` in ECMA262 edition 5.1. 117 | They are formally defined in ECMA262 section [7.6.1](http://es5.github.io/#x7.6.1). 118 | If the `strict` flag is truthy, this function additionally checks whether `id` 119 | is a `ReservedWord` under strict mode. 120 | 121 | ### `keyword.isReservedWordES6(id, strict)` 122 | 123 | Returns `true` if provided identifier string is a `ReservedWord` in ECMA262 edition 6. 124 | They are formally defined in ECMA262 section [11.6.2](http://ecma-international.org/ecma-262/6.0/#sec-reserved-words). 125 | If the `strict` flag is truthy, this function additionally checks whether `id` 126 | is a `ReservedWord` under strict mode. 127 | 128 | ### `keyword.isRestrictedWord(id)` 129 | 130 | Returns `true` if provided identifier string is one of `eval` or `arguments`. 131 | They are restricted in strict mode code throughout ECMA262 edition 5.1 and 132 | in ECMA262 edition 6 section [12.1.1](http://ecma-international.org/ecma-262/6.0/#sec-identifiers-static-semantics-early-errors). 133 | 134 | ### `keyword.isIdentifierNameES5(id)` 135 | 136 | Return `true` if provided identifier string is an `IdentifierName` as specified in 137 | ECMA262 edition 5.1 section [7.6](https://es5.github.io/#x7.6). 138 | 139 | ### `keyword.isIdentifierNameES6(id)` 140 | 141 | Return `true` if provided identifier string is an `IdentifierName` as specified in 142 | ECMA262 edition 6 section [11.6](http://ecma-international.org/ecma-262/6.0/#sec-names-and-keywords). 143 | 144 | ### `keyword.isIdentifierES5(id, strict)` 145 | 146 | Return `true` if provided identifier string is an `Identifier` as specified in 147 | ECMA262 edition 5.1 section [7.6](https://es5.github.io/#x7.6). 148 | If the `strict` flag is truthy, this function additionally checks whether `id` 149 | is an `Identifier` under strict mode. 150 | 151 | ### `keyword.isIdentifierES6(id, strict)` 152 | 153 | Return `true` if provided identifier string is an `Identifier` as specified in 154 | ECMA262 edition 6 section [12.1](http://ecma-international.org/ecma-262/6.0/#sec-identifiers). 155 | If the `strict` flag is truthy, this function additionally checks whether `id` 156 | is an `Identifier` under strict mode. 157 | 158 | ## License 159 | 160 | Copyright (C) 2013 [Yusuke Suzuki](http://github.com/Constellation) 161 | (twitter: [@Constellation](http://twitter.com/Constellation)) and other contributors. 162 | 163 | Redistribution and use in source and binary forms, with or without 164 | modification, are permitted provided that the following conditions are met: 165 | 166 | * Redistributions of source code must retain the above copyright 167 | notice, this list of conditions and the following disclaimer. 168 | 169 | * Redistributions in binary form must reproduce the above copyright 170 | notice, this list of conditions and the following disclaimer in the 171 | documentation and/or other materials provided with the distribution. 172 | 173 | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 174 | AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 175 | IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 176 | ARE DISCLAIMED. IN NO EVENT SHALL BE LIABLE FOR ANY 177 | DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 178 | (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 179 | LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 180 | ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 181 | (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 182 | THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 183 | -------------------------------------------------------------------------------- /lib/ast.js: -------------------------------------------------------------------------------- 1 | /* 2 | Copyright (C) 2013 Yusuke Suzuki 3 | 4 | Redistribution and use in source and binary forms, with or without 5 | modification, are permitted provided that the following conditions are met: 6 | 7 | * Redistributions of source code must retain the above copyright 8 | notice, this list of conditions and the following disclaimer. 9 | * Redistributions in binary form must reproduce the above copyright 10 | notice, this list of conditions and the following disclaimer in the 11 | documentation and/or other materials provided with the distribution. 12 | 13 | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 'AS IS' 14 | AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15 | IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 16 | ARE DISCLAIMED. IN NO EVENT SHALL BE LIABLE FOR ANY 17 | DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 18 | (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 19 | LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 20 | ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 21 | (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 22 | THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 23 | */ 24 | 25 | (function () { 26 | 'use strict'; 27 | 28 | function isExpression(node) { 29 | if (node == null) { return false; } 30 | switch (node.type) { 31 | case 'ArrayExpression': 32 | case 'AssignmentExpression': 33 | case 'BinaryExpression': 34 | case 'CallExpression': 35 | case 'ConditionalExpression': 36 | case 'FunctionExpression': 37 | case 'Identifier': 38 | case 'Literal': 39 | case 'LogicalExpression': 40 | case 'MemberExpression': 41 | case 'NewExpression': 42 | case 'ObjectExpression': 43 | case 'SequenceExpression': 44 | case 'ThisExpression': 45 | case 'UnaryExpression': 46 | case 'UpdateExpression': 47 | return true; 48 | } 49 | return false; 50 | } 51 | 52 | function isIterationStatement(node) { 53 | if (node == null) { return false; } 54 | switch (node.type) { 55 | case 'DoWhileStatement': 56 | case 'ForInStatement': 57 | case 'ForStatement': 58 | case 'WhileStatement': 59 | return true; 60 | } 61 | return false; 62 | } 63 | 64 | function isStatement(node) { 65 | if (node == null) { return false; } 66 | switch (node.type) { 67 | case 'BlockStatement': 68 | case 'BreakStatement': 69 | case 'ContinueStatement': 70 | case 'DebuggerStatement': 71 | case 'DoWhileStatement': 72 | case 'EmptyStatement': 73 | case 'ExpressionStatement': 74 | case 'ForInStatement': 75 | case 'ForStatement': 76 | case 'IfStatement': 77 | case 'LabeledStatement': 78 | case 'ReturnStatement': 79 | case 'SwitchStatement': 80 | case 'ThrowStatement': 81 | case 'TryStatement': 82 | case 'VariableDeclaration': 83 | case 'WhileStatement': 84 | case 'WithStatement': 85 | return true; 86 | } 87 | return false; 88 | } 89 | 90 | function isSourceElement(node) { 91 | return isStatement(node) || node != null && node.type === 'FunctionDeclaration'; 92 | } 93 | 94 | function trailingStatement(node) { 95 | switch (node.type) { 96 | case 'IfStatement': 97 | if (node.alternate != null) { 98 | return node.alternate; 99 | } 100 | return node.consequent; 101 | 102 | case 'LabeledStatement': 103 | case 'ForStatement': 104 | case 'ForInStatement': 105 | case 'WhileStatement': 106 | case 'WithStatement': 107 | return node.body; 108 | } 109 | return null; 110 | } 111 | 112 | function isProblematicIfStatement(node) { 113 | var current; 114 | 115 | if (node.type !== 'IfStatement') { 116 | return false; 117 | } 118 | if (node.alternate == null) { 119 | return false; 120 | } 121 | current = node.consequent; 122 | do { 123 | if (current.type === 'IfStatement') { 124 | if (current.alternate == null) { 125 | return true; 126 | } 127 | } 128 | current = trailingStatement(current); 129 | } while (current); 130 | 131 | return false; 132 | } 133 | 134 | module.exports = { 135 | isExpression: isExpression, 136 | isStatement: isStatement, 137 | isIterationStatement: isIterationStatement, 138 | isSourceElement: isSourceElement, 139 | isProblematicIfStatement: isProblematicIfStatement, 140 | 141 | trailingStatement: trailingStatement 142 | }; 143 | }()); 144 | /* vim: set sw=4 ts=4 et tw=80 : */ 145 | -------------------------------------------------------------------------------- /lib/code.js: -------------------------------------------------------------------------------- 1 | /* 2 | Copyright (C) 2013-2014 Yusuke Suzuki 3 | Copyright (C) 2014 Ivan Nikulin 4 | 5 | Redistribution and use in source and binary forms, with or without 6 | modification, are permitted provided that the following conditions are met: 7 | 8 | * Redistributions of source code must retain the above copyright 9 | notice, this list of conditions and the following disclaimer. 10 | * Redistributions in binary form must reproduce the above copyright 11 | notice, this list of conditions and the following disclaimer in the 12 | documentation and/or other materials provided with the distribution. 13 | 14 | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 15 | AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 | IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 | ARE DISCLAIMED. IN NO EVENT SHALL BE LIABLE FOR ANY 18 | DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 19 | (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 20 | LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 21 | ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 | (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 23 | THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 | */ 25 | 26 | (function () { 27 | 'use strict'; 28 | 29 | var ES6Regex, ES5Regex, NON_ASCII_WHITESPACES, IDENTIFIER_START, IDENTIFIER_PART, ch; 30 | 31 | // See `tools/generate-identifier-regex.js`. 32 | ES5Regex = { 33 | // ECMAScript 5.1/Unicode v9.0.0 NonAsciiIdentifierStart: 34 | NonAsciiIdentifierStart: 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35 | // ECMAScript 5.1/Unicode v9.0.0 NonAsciiIdentifierPart: 36 | NonAsciiIdentifierPart: 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42 | // ECMAScript 6/Unicode v9.0.0 NonAsciiIdentifierPart: 43 | NonAsciiIdentifierPart: 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F\uFF41-\uFF5A\uFF66-\uFFBE\uFFC2-\uFFC7\uFFCA-\uFFCF\uFFD2-\uFFD7\uFFDA-\uFFDC]|\uD800[\uDC00-\uDC0B\uDC0D-\uDC26\uDC28-\uDC3A\uDC3C\uDC3D\uDC3F-\uDC4D\uDC50-\uDC5D\uDC80-\uDCFA\uDD40-\uDD74\uDDFD\uDE80-\uDE9C\uDEA0-\uDED0\uDEE0\uDF00-\uDF1F\uDF30-\uDF4A\uDF50-\uDF7A\uDF80-\uDF9D\uDFA0-\uDFC3\uDFC8-\uDFCF\uDFD1-\uDFD5]|\uD801[\uDC00-\uDC9D\uDCA0-\uDCA9\uDCB0-\uDCD3\uDCD8-\uDCFB\uDD00-\uDD27\uDD30-\uDD63\uDE00-\uDF36\uDF40-\uDF55\uDF60-\uDF67]|\uD802[\uDC00-\uDC05\uDC08\uDC0A-\uDC35\uDC37\uDC38\uDC3C\uDC3F-\uDC55\uDC60-\uDC76\uDC80-\uDC9E\uDCE0-\uDCF2\uDCF4\uDCF5\uDD00-\uDD15\uDD20-\uDD39\uDD80-\uDDB7\uDDBE\uDDBF\uDE00-\uDE03\uDE05\uDE06\uDE0C-\uDE13\uDE15-\uDE17\uDE19-\uDE33\uDE38-\uDE3A\uDE3F\uDE60-\uDE7C\uDE80-\uDE9C\uDEC0-\uDEC7\uDEC9-\uDEE6\uDF00-\uDF35\uDF40-\uDF55\uDF60-\uDF72\uDF80-\uDF91]|\uD803[\uDC00-\uDC48\uDC80-\uDCB2\uDCC0-\uDCF2]|\uD804[\uDC00-\uDC46\uDC66-\uDC6F\uDC7F-\uDCBA\uDCD0-\uDCE8\uDCF0-\uDCF9\uDD00-\uDD34\uDD36-\uDD3F\uDD50-\uDD73\uDD76\uDD80-\uDDC4\uDDCA-\uDDCC\uDDD0-\uDDDA\uDDDC\uDE00-\uDE11\uDE13-\uDE37\uDE3E\uDE80-\uDE86\uDE88\uDE8A-\uDE8D\uDE8F-\uDE9D\uDE9F-\uDEA8\uDEB0-\uDEEA\uDEF0-\uDEF9\uDF00-\uDF03\uDF05-\uDF0C\uDF0F\uDF10\uDF13-\uDF28\uDF2A-\uDF30\uDF32\uDF33\uDF35-\uDF39\uDF3C-\uDF44\uDF47\uDF48\uDF4B-\uDF4D\uDF50\uDF57\uDF5D-\uDF63\uDF66-\uDF6C\uDF70-\uDF74]|\uD805[\uDC00-\uDC4A\uDC50-\uDC59\uDC80-\uDCC5\uDCC7\uDCD0-\uDCD9\uDD80-\uDDB5\uDDB8-\uDDC0\uDDD8-\uDDDD\uDE00-\uDE40\uDE44\uDE50-\uDE59\uDE80-\uDEB7\uDEC0-\uDEC9\uDF00-\uDF19\uDF1D-\uDF2B\uDF30-\uDF39]|\uD806[\uDCA0-\uDCE9\uDCFF\uDEC0-\uDEF8]|\uD807[\uDC00-\uDC08\uDC0A-\uDC36\uDC38-\uDC40\uDC50-\uDC59\uDC72-\uDC8F\uDC92-\uDCA7\uDCA9-\uDCB6]|\uD808[\uDC00-\uDF99]|\uD809[\uDC00-\uDC6E\uDC80-\uDD43]|[\uD80C\uD81C-\uD820\uD840-\uD868\uD86A-\uD86C\uD86F-\uD872][\uDC00-\uDFFF]|\uD80D[\uDC00-\uDC2E]|\uD811[\uDC00-\uDE46]|\uD81A[\uDC00-\uDE38\uDE40-\uDE5E\uDE60-\uDE69\uDED0-\uDEED\uDEF0-\uDEF4\uDF00-\uDF36\uDF40-\uDF43\uDF50-\uDF59\uDF63-\uDF77\uDF7D-\uDF8F]|\uD81B[\uDF00-\uDF44\uDF50-\uDF7E\uDF8F-\uDF9F\uDFE0]|\uD821[\uDC00-\uDFEC]|\uD822[\uDC00-\uDEF2]|\uD82C[\uDC00\uDC01]|\uD82F[\uDC00-\uDC6A\uDC70-\uDC7C\uDC80-\uDC88\uDC90-\uDC99\uDC9D\uDC9E]|\uD834[\uDD65-\uDD69\uDD6D-\uDD72\uDD7B-\uDD82\uDD85-\uDD8B\uDDAA-\uDDAD\uDE42-\uDE44]|\uD835[\uDC00-\uDC54\uDC56-\uDC9C\uDC9E\uDC9F\uDCA2\uDCA5\uDCA6\uDCA9-\uDCAC\uDCAE-\uDCB9\uDCBB\uDCBD-\uDCC3\uDCC5-\uDD05\uDD07-\uDD0A\uDD0D-\uDD14\uDD16-\uDD1C\uDD1E-\uDD39\uDD3B-\uDD3E\uDD40-\uDD44\uDD46\uDD4A-\uDD50\uDD52-\uDEA5\uDEA8-\uDEC0\uDEC2-\uDEDA\uDEDC-\uDEFA\uDEFC-\uDF14\uDF16-\uDF34\uDF36-\uDF4E\uDF50-\uDF6E\uDF70-\uDF88\uDF8A-\uDFA8\uDFAA-\uDFC2\uDFC4-\uDFCB\uDFCE-\uDFFF]|\uD836[\uDE00-\uDE36\uDE3B-\uDE6C\uDE75\uDE84\uDE9B-\uDE9F\uDEA1-\uDEAF]|\uD838[\uDC00-\uDC06\uDC08-\uDC18\uDC1B-\uDC21\uDC23\uDC24\uDC26-\uDC2A]|\uD83A[\uDC00-\uDCC4\uDCD0-\uDCD6\uDD00-\uDD4A\uDD50-\uDD59]|\uD83B[\uDE00-\uDE03\uDE05-\uDE1F\uDE21\uDE22\uDE24\uDE27\uDE29-\uDE32\uDE34-\uDE37\uDE39\uDE3B\uDE42\uDE47\uDE49\uDE4B\uDE4D-\uDE4F\uDE51\uDE52\uDE54\uDE57\uDE59\uDE5B\uDE5D\uDE5F\uDE61\uDE62\uDE64\uDE67-\uDE6A\uDE6C-\uDE72\uDE74-\uDE77\uDE79-\uDE7C\uDE7E\uDE80-\uDE89\uDE8B-\uDE9B\uDEA1-\uDEA3\uDEA5-\uDEA9\uDEAB-\uDEBB]|\uD869[\uDC00-\uDED6\uDF00-\uDFFF]|\uD86D[\uDC00-\uDF34\uDF40-\uDFFF]|\uD86E[\uDC00-\uDC1D\uDC20-\uDFFF]|\uD873[\uDC00-\uDEA1]|\uD87E[\uDC00-\uDE1D]|\uDB40[\uDD00-\uDDEF]/ 44 | }; 45 | 46 | function isDecimalDigit(ch) { 47 | return 0x30 <= ch && ch <= 0x39; // 0..9 48 | } 49 | 50 | function isHexDigit(ch) { 51 | return 0x30 <= ch && ch <= 0x39 || // 0..9 52 | 0x61 <= ch && ch <= 0x66 || // a..f 53 | 0x41 <= ch && ch <= 0x46; // A..F 54 | } 55 | 56 | function isOctalDigit(ch) { 57 | return ch >= 0x30 && ch <= 0x37; // 0..7 58 | } 59 | 60 | // 7.2 White Space 61 | 62 | NON_ASCII_WHITESPACES = [ 63 | 0x1680, 64 | 0x2000, 0x2001, 0x2002, 0x2003, 0x2004, 0x2005, 0x2006, 0x2007, 0x2008, 0x2009, 0x200A, 65 | 0x202F, 0x205F, 66 | 0x3000, 67 | 0xFEFF 68 | ]; 69 | 70 | function isWhiteSpace(ch) { 71 | return ch === 0x20 || ch === 0x09 || ch === 0x0B || ch === 0x0C || ch === 0xA0 || 72 | ch >= 0x1680 && NON_ASCII_WHITESPACES.indexOf(ch) >= 0; 73 | } 74 | 75 | // 7.3 Line Terminators 76 | 77 | function isLineTerminator(ch) { 78 | return ch === 0x0A || ch === 0x0D || ch === 0x2028 || ch === 0x2029; 79 | } 80 | 81 | // 7.6 Identifier Names and Identifiers 82 | 83 | function fromCodePoint(cp) { 84 | if (cp <= 0xFFFF) { return String.fromCharCode(cp); } 85 | var cu1 = String.fromCharCode(Math.floor((cp - 0x10000) / 0x400) + 0xD800); 86 | var cu2 = String.fromCharCode(((cp - 0x10000) % 0x400) + 0xDC00); 87 | return cu1 + cu2; 88 | } 89 | 90 | IDENTIFIER_START = new Array(0x80); 91 | for(ch = 0; ch < 0x80; ++ch) { 92 | IDENTIFIER_START[ch] = 93 | ch >= 0x61 && ch <= 0x7A || // a..z 94 | ch >= 0x41 && ch <= 0x5A || // A..Z 95 | ch === 0x24 || ch === 0x5F; // $ (dollar) and _ (underscore) 96 | } 97 | 98 | IDENTIFIER_PART = new Array(0x80); 99 | for(ch = 0; ch < 0x80; ++ch) { 100 | IDENTIFIER_PART[ch] = 101 | ch >= 0x61 && ch <= 0x7A || // a..z 102 | ch >= 0x41 && ch <= 0x5A || // A..Z 103 | ch >= 0x30 && ch <= 0x39 || // 0..9 104 | ch === 0x24 || ch === 0x5F; // $ (dollar) and _ (underscore) 105 | } 106 | 107 | function isIdentifierStartES5(ch) { 108 | return ch < 0x80 ? IDENTIFIER_START[ch] : ES5Regex.NonAsciiIdentifierStart.test(fromCodePoint(ch)); 109 | } 110 | 111 | function isIdentifierPartES5(ch) { 112 | return ch < 0x80 ? IDENTIFIER_PART[ch] : ES5Regex.NonAsciiIdentifierPart.test(fromCodePoint(ch)); 113 | } 114 | 115 | function isIdentifierStartES6(ch) { 116 | return ch < 0x80 ? IDENTIFIER_START[ch] : ES6Regex.NonAsciiIdentifierStart.test(fromCodePoint(ch)); 117 | } 118 | 119 | function isIdentifierPartES6(ch) { 120 | return ch < 0x80 ? IDENTIFIER_PART[ch] : ES6Regex.NonAsciiIdentifierPart.test(fromCodePoint(ch)); 121 | } 122 | 123 | module.exports = { 124 | isDecimalDigit: isDecimalDigit, 125 | isHexDigit: isHexDigit, 126 | isOctalDigit: isOctalDigit, 127 | isWhiteSpace: isWhiteSpace, 128 | isLineTerminator: isLineTerminator, 129 | isIdentifierStartES5: isIdentifierStartES5, 130 | isIdentifierPartES5: isIdentifierPartES5, 131 | isIdentifierStartES6: isIdentifierStartES6, 132 | isIdentifierPartES6: isIdentifierPartES6 133 | }; 134 | }()); 135 | /* vim: set sw=4 ts=4 et tw=80 : */ 136 | -------------------------------------------------------------------------------- /lib/keyword.js: -------------------------------------------------------------------------------- 1 | /* 2 | Copyright (C) 2013 Yusuke Suzuki 3 | 4 | Redistribution and use in source and binary forms, with or without 5 | modification, are permitted provided that the following conditions are met: 6 | 7 | * Redistributions of source code must retain the above copyright 8 | notice, this list of conditions and the following disclaimer. 9 | * Redistributions in binary form must reproduce the above copyright 10 | notice, this list of conditions and the following disclaimer in the 11 | documentation and/or other materials provided with the distribution. 12 | 13 | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 14 | AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15 | IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 16 | ARE DISCLAIMED. IN NO EVENT SHALL BE LIABLE FOR ANY 17 | DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 18 | (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 19 | LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 20 | ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 21 | (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 22 | THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 23 | */ 24 | 25 | (function () { 26 | 'use strict'; 27 | 28 | var code = require('./code'); 29 | 30 | function isStrictModeReservedWordES6(id) { 31 | switch (id) { 32 | case 'implements': 33 | case 'interface': 34 | case 'package': 35 | case 'private': 36 | case 'protected': 37 | case 'public': 38 | case 'static': 39 | case 'let': 40 | return true; 41 | default: 42 | return false; 43 | } 44 | } 45 | 46 | function isKeywordES5(id, strict) { 47 | // yield should not be treated as keyword under non-strict mode. 48 | if (!strict && id === 'yield') { 49 | return false; 50 | } 51 | return isKeywordES6(id, strict); 52 | } 53 | 54 | function isKeywordES6(id, strict) { 55 | if (strict && isStrictModeReservedWordES6(id)) { 56 | return true; 57 | } 58 | 59 | switch (id.length) { 60 | case 2: 61 | return (id === 'if') || (id === 'in') || (id === 'do'); 62 | case 3: 63 | return (id === 'var') || (id === 'for') || (id === 'new') || (id === 'try'); 64 | case 4: 65 | return (id === 'this') || (id === 'else') || (id === 'case') || 66 | (id === 'void') || (id === 'with') || (id === 'enum'); 67 | case 5: 68 | return (id === 'while') || (id === 'break') || (id === 'catch') || 69 | (id === 'throw') || (id === 'const') || (id === 'yield') || 70 | (id === 'class') || (id === 'super'); 71 | case 6: 72 | return (id === 'return') || (id === 'typeof') || (id === 'delete') || 73 | (id === 'switch') || (id === 'export') || (id === 'import'); 74 | case 7: 75 | return (id === 'default') || (id === 'finally') || (id === 'extends'); 76 | case 8: 77 | return (id === 'function') || (id === 'continue') || (id === 'debugger'); 78 | case 10: 79 | return (id === 'instanceof'); 80 | default: 81 | return false; 82 | } 83 | } 84 | 85 | function isReservedWordES5(id, strict) { 86 | return id === 'null' || id === 'true' || id === 'false' || isKeywordES5(id, strict); 87 | } 88 | 89 | function isReservedWordES6(id, strict) { 90 | return id === 'null' || id === 'true' || id === 'false' || isKeywordES6(id, strict); 91 | } 92 | 93 | function isRestrictedWord(id) { 94 | return id === 'eval' || id === 'arguments'; 95 | } 96 | 97 | function isIdentifierNameES5(id) { 98 | var i, iz, ch; 99 | 100 | if (id.length === 0) { return false; } 101 | 102 | ch = id.charCodeAt(0); 103 | if (!code.isIdentifierStartES5(ch)) { 104 | return false; 105 | } 106 | 107 | for (i = 1, iz = id.length; i < iz; ++i) { 108 | ch = id.charCodeAt(i); 109 | if (!code.isIdentifierPartES5(ch)) { 110 | return false; 111 | } 112 | } 113 | return true; 114 | } 115 | 116 | function decodeUtf16(lead, trail) { 117 | return (lead - 0xD800) * 0x400 + (trail - 0xDC00) + 0x10000; 118 | } 119 | 120 | function isIdentifierNameES6(id) { 121 | var i, iz, ch, lowCh, check; 122 | 123 | if (id.length === 0) { return false; } 124 | 125 | check = code.isIdentifierStartES6; 126 | for (i = 0, iz = id.length; i < iz; ++i) { 127 | ch = id.charCodeAt(i); 128 | if (0xD800 <= ch && ch <= 0xDBFF) { 129 | ++i; 130 | if (i >= iz) { return false; } 131 | lowCh = id.charCodeAt(i); 132 | if (!(0xDC00 <= lowCh && lowCh <= 0xDFFF)) { 133 | return false; 134 | } 135 | ch = decodeUtf16(ch, lowCh); 136 | } 137 | if (!check(ch)) { 138 | return false; 139 | } 140 | check = code.isIdentifierPartES6; 141 | } 142 | return true; 143 | } 144 | 145 | function isIdentifierES5(id, strict) { 146 | return isIdentifierNameES5(id) && !isReservedWordES5(id, strict); 147 | } 148 | 149 | function isIdentifierES6(id, strict) { 150 | return isIdentifierNameES6(id) && !isReservedWordES6(id, strict); 151 | } 152 | 153 | module.exports = { 154 | isKeywordES5: isKeywordES5, 155 | isKeywordES6: isKeywordES6, 156 | isReservedWordES5: isReservedWordES5, 157 | isReservedWordES6: isReservedWordES6, 158 | isRestrictedWord: isRestrictedWord, 159 | isIdentifierNameES5: isIdentifierNameES5, 160 | isIdentifierNameES6: isIdentifierNameES6, 161 | isIdentifierES5: isIdentifierES5, 162 | isIdentifierES6: isIdentifierES6 163 | }; 164 | }()); 165 | /* vim: set sw=4 ts=4 et tw=80 : */ 166 | -------------------------------------------------------------------------------- /lib/utils.js: -------------------------------------------------------------------------------- 1 | /* 2 | Copyright (C) 2013 Yusuke Suzuki 3 | 4 | Redistribution and use in source and binary forms, with or without 5 | modification, are permitted provided that the following conditions are met: 6 | 7 | * Redistributions of source code must retain the above copyright 8 | notice, this list of conditions and the following disclaimer. 9 | * Redistributions in binary form must reproduce the above copyright 10 | notice, this list of conditions and the following disclaimer in the 11 | documentation and/or other materials provided with the distribution. 12 | 13 | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 14 | AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15 | IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 16 | ARE DISCLAIMED. IN NO EVENT SHALL BE LIABLE FOR ANY 17 | DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 18 | (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 19 | LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 20 | ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 21 | (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 22 | THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 23 | */ 24 | 25 | 26 | (function () { 27 | 'use strict'; 28 | 29 | exports.ast = require('./ast'); 30 | exports.code = require('./code'); 31 | exports.keyword = require('./keyword'); 32 | }()); 33 | /* vim: set sw=4 ts=4 et tw=80 : */ 34 | -------------------------------------------------------------------------------- /package.json: -------------------------------------------------------------------------------- 1 | { 2 | "name": "esutils", 3 | "description": "utility box for ECMAScript language tools", 4 | "homepage": "https://github.com/estools/esutils", 5 | "main": "lib/utils.js", 6 | "version": "2.0.4-dev", 7 | "engines": { 8 | "node": ">=0.10.0" 9 | }, 10 | "directories": { 11 | "lib": "./lib" 12 | }, 13 | "files": [ 14 | "LICENSE.BSD", 15 | "README.md", 16 | "lib" 17 | ], 18 | "maintainers": [ 19 | { 20 | "name": "Yusuke Suzuki", 21 | "email": "utatane.tea@gmail.com", 22 | "web": "http://github.com/Constellation" 23 | } 24 | ], 25 | "repository": { 26 | "type": "git", 27 | "url": "http://github.com/estools/esutils.git" 28 | }, 29 | "devDependencies": { 30 | "chai": "~1.7.2", 31 | "coffee-script": "~1.6.3", 32 | "jshint": "2.6.3", 33 | "mocha": "~2.2.1", 34 | "regenerate": "~1.3.1", 35 | "unicode-9.0.0": "~0.7.0" 36 | }, 37 | "license": "BSD-2-Clause", 38 | "scripts": { 39 | "test": "npm run-script lint && npm run-script unit-test", 40 | "lint": "jshint lib/*.js", 41 | "unit-test": "mocha --compilers coffee:coffee-script -R spec", 42 | "generate-regex": "node tools/generate-identifier-regex.js" 43 | } 44 | } 45 | -------------------------------------------------------------------------------- /test/ast.coffee: -------------------------------------------------------------------------------- 1 | # Copyright (C) 2013 Yusuke Suzuki 2 | # 3 | # Redistribution and use in source and binary forms, with or without 4 | # modification, are permitted provided that the following conditions are 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 copyright 9 | # notice, this list of conditions and the following disclaimer in the 10 | # documentation and/or other materials provided with the distribution. 11 | # 12 | # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 13 | # AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 14 | # IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 15 | # ARE DISCLAIMED. IN NO EVENT SHALL BE LIABLE FOR ANY 16 | # DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 17 | # (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 18 | # LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 19 | # ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 20 | # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 21 | # THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 22 | 23 | 'use strict' 24 | 25 | expect = require('chai').expect 26 | esutils = require '../' 27 | 28 | EMPTY = {type: 'EmptyStatement'} 29 | 30 | describe 'ast', -> 31 | describe 'isExpression', -> 32 | it 'returns false if input is not node', -> 33 | expect(esutils.ast.isExpression(0)).to.be.false 34 | expect(esutils.ast.isExpression(null)).to.be.false 35 | expect(esutils.ast.isExpression(undefined)).to.be.false 36 | expect(esutils.ast.isExpression({})).to.be.false 37 | expect(esutils.ast.isExpression({type: null})).to.be.false 38 | expect(esutils.ast.isExpression({type: undefined})).to.be.false 39 | 40 | it 'returns true if provided node is expression', -> 41 | expect(esutils.ast.isExpression({type: "ThisExpression"})).to.be.true 42 | expect(esutils.ast.isExpression({type: "Literal", value: 0})).to.be.true 43 | 44 | it 'returns false if provided node is not expression', -> 45 | expect(esutils.ast.isExpression({type: "ExpressionStatement"})).to.be.false 46 | expect(esutils.ast.isExpression({type: "Program"})).to.be.false 47 | 48 | 49 | describe 'isIterationStatement', -> 50 | it 'returns false if input is not node', -> 51 | expect(esutils.ast.isIterationStatement(0)).to.be.false 52 | expect(esutils.ast.isIterationStatement(null)).to.be.false 53 | expect(esutils.ast.isIterationStatement(undefined)).to.be.false 54 | expect(esutils.ast.isIterationStatement({})).to.be.false 55 | expect(esutils.ast.isIterationStatement({type: null})).to.be.false 56 | expect(esutils.ast.isIterationStatement({type: undefined})).to.be.false 57 | 58 | it 'returns true if provided node is iteration statement', -> 59 | expect(esutils.ast.isIterationStatement({type: "ForInStatement"})).to.be.true 60 | expect(esutils.ast.isIterationStatement({type: "DoWhileStatement"})).to.be.true 61 | 62 | it 'returns false if provided node is not iteration statement', -> 63 | expect(esutils.ast.isIterationStatement({type: "ExpressionStatement"})).to.be.false 64 | expect(esutils.ast.isIterationStatement({type: "ThisExpression"})).to.be.false 65 | 66 | 67 | describe 'isStatement', -> 68 | it 'returns false if input is not node', -> 69 | expect(esutils.ast.isStatement(0)).to.be.false 70 | expect(esutils.ast.isStatement(null)).to.be.false 71 | expect(esutils.ast.isStatement(undefined)).to.be.false 72 | expect(esutils.ast.isStatement({})).to.be.false 73 | expect(esutils.ast.isStatement({type: null})).to.be.false 74 | expect(esutils.ast.isStatement({type: undefined})).to.be.false 75 | 76 | it 'returns true if provided node is statement', -> 77 | expect(esutils.ast.isStatement({type: "ExpressionStatement"})).to.be.true 78 | expect(esutils.ast.isStatement({type: "WhileStatement"})).to.be.true 79 | 80 | it 'returns false if provided node is not statement', -> 81 | expect(esutils.ast.isStatement({type: "ThisExpression"})).to.be.false 82 | expect(esutils.ast.isStatement({type: "FunctionDeclaration"})).to.be.false 83 | expect(esutils.ast.isStatement({type: "Program"})).to.be.false 84 | 85 | 86 | describe 'isSourceElement', -> 87 | it 'returns false if input is not node', -> 88 | expect(esutils.ast.isSourceElement(0)).to.be.false 89 | expect(esutils.ast.isSourceElement(null)).to.be.false 90 | expect(esutils.ast.isSourceElement(undefined)).to.be.false 91 | expect(esutils.ast.isSourceElement({})).to.be.false 92 | expect(esutils.ast.isSourceElement({type: null})).to.be.false 93 | expect(esutils.ast.isSourceElement({type: undefined})).to.be.false 94 | 95 | it 'returns true if provided node is source element', -> 96 | expect(esutils.ast.isSourceElement({type: "ExpressionStatement"})).to.be.true 97 | expect(esutils.ast.isSourceElement({type: "WhileStatement"})).to.be.true 98 | expect(esutils.ast.isSourceElement({type: "FunctionDeclaration"})).to.be.true 99 | 100 | it 'returns false if provided node is not source element', -> 101 | expect(esutils.ast.isSourceElement({type: "ThisExpression"})).to.be.false 102 | expect(esutils.ast.isSourceElement({type: "Program"})).to.be.false 103 | 104 | describe 'trailingStatement', -> 105 | it 'returns trailing statement if node has it', -> 106 | expect(esutils.ast.trailingStatement({type: 'WhileStatement', body: EMPTY})).to.be.eq EMPTY 107 | expect(esutils.ast.trailingStatement({type: 'WithStatement', body: EMPTY})).to.be.eq EMPTY 108 | expect(esutils.ast.trailingStatement({type: 'ForStatement', body: EMPTY})).to.be.eq EMPTY 109 | expect(esutils.ast.trailingStatement({type: 'ForInStatement', body: EMPTY})).to.be.eq EMPTY 110 | expect(esutils.ast.trailingStatement({type: 'IfStatement', consequent: EMPTY})).to.be.eq EMPTY 111 | expect(esutils.ast.trailingStatement({type: 'IfStatement', consequent: {type:'EmptyStatement'}, alternate: EMPTY})).to.be.eq EMPTY 112 | expect(esutils.ast.trailingStatement({type: 'LabeledStatement', body: EMPTY})).to.be.eq EMPTY 113 | 114 | it 'returns null if node doens\'t have trailing statement', -> 115 | expect(esutils.ast.trailingStatement({type: 'DoWhileStatement', body: EMPTY})).to.be.null 116 | expect(esutils.ast.trailingStatement({type: 'ReturnStatement' })).to.be.null 117 | 118 | describe 'isProblematicIfStatement', -> 119 | it 'returns true if node is problematic if statement', -> 120 | expect(esutils.ast.isProblematicIfStatement( 121 | type: 'IfStatement' 122 | consequent: { 123 | type: 'IfStatement' 124 | consequent: EMPTY 125 | } 126 | alternate: EMPTY 127 | )).to.be.true 128 | 129 | expect(esutils.ast.isProblematicIfStatement( 130 | type: 'IfStatement' 131 | consequent: 132 | type: 'LabeledStatement' 133 | body: 134 | type: 'IfStatement' 135 | consequent: EMPTY 136 | alternate: EMPTY 137 | )).to.be.true 138 | 139 | expect(esutils.ast.isProblematicIfStatement( 140 | type: 'IfStatement' 141 | consequent: 142 | type: 'WithStatement' 143 | body: 144 | type: 'IfStatement' 145 | consequent: EMPTY 146 | alternate: EMPTY 147 | )).to.be.true 148 | 149 | it 'returns false if node is not problematic if statement', -> 150 | expect(esutils.ast.isProblematicIfStatement( 151 | type: 'IfStatement' 152 | consequent: EMPTY 153 | alternate: EMPTY 154 | )).to.be.false 155 | 156 | expect(esutils.ast.isProblematicIfStatement( 157 | type: 'IfStatement' 158 | consequent: 159 | type: 'BlockStatement' 160 | body: [ 161 | type: 'IfStatement' 162 | consequent: EMPTY 163 | ] 164 | alternate: EMPTY 165 | )).to.be.false 166 | 167 | expect(esutils.ast.isProblematicIfStatement( 168 | type: 'IfStatement' 169 | consequent: 170 | type: 'DoWhileStatement' 171 | body: 172 | type: 'IfStatement' 173 | consequent: EMPTY 174 | alternate: EMPTY 175 | )).to.be.false 176 | -------------------------------------------------------------------------------- /test/code.coffee: -------------------------------------------------------------------------------- 1 | # Copyright (C) 2013 Yusuke Suzuki 2 | # 3 | # Redistribution and use in source and binary forms, with or without 4 | # modification, are permitted provided that the following conditions are 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 copyright 9 | # notice, this list of conditions and the following disclaimer in the 10 | # documentation and/or other materials provided with the distribution. 11 | # 12 | # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 13 | # AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 14 | # IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 15 | # ARE DISCLAIMED. IN NO EVENT SHALL BE LIABLE FOR ANY 16 | # DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 17 | # (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 18 | # LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 19 | # ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 20 | # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 21 | # THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 22 | 23 | 'use strict' 24 | 25 | expect = require('chai').expect 26 | esutils = require '../' 27 | 28 | describe 'code', -> 29 | describe 'isDecimalDigit', -> 30 | it 'returns true if provided code is decimal digit', -> 31 | for ch in [0..9] 32 | expect(esutils.code.isDecimalDigit((ch + '').charCodeAt(0))).to.be.true 33 | 34 | it 'returns false if provided code is not decimal digit', -> 35 | for code in ['a'.charCodeAt(0)..'z'.charCodeAt(0)] 36 | expect(esutils.code.isDecimalDigit(code)).to.be.false 37 | 38 | for code in ['A'.charCodeAt(0)..'Z'.charCodeAt(0)] 39 | expect(esutils.code.isDecimalDigit(code)).to.be.false 40 | 41 | describe 'isHexDigit', -> 42 | it 'returns true if provided code is hexadecimal digit', -> 43 | for ch in [0..9] 44 | expect(esutils.code.isHexDigit((ch + '').charCodeAt(0))).to.be.true 45 | 46 | for code in ['a'.charCodeAt(0)..'f'.charCodeAt(0)] 47 | expect(esutils.code.isHexDigit(code)).to.be.true 48 | 49 | for code in ['A'.charCodeAt(0)..'F'.charCodeAt(0)] 50 | expect(esutils.code.isHexDigit(code)).to.be.true 51 | 52 | it 'returns false if provided code is not hexadecimal digit', -> 53 | for code in ['g'.charCodeAt(0)..'z'.charCodeAt(0)] 54 | expect(esutils.code.isHexDigit(code)).to.be.false 55 | 56 | for code in ['G'.charCodeAt(0)..'Z'.charCodeAt(0)] 57 | expect(esutils.code.isHexDigit(code)).to.be.false 58 | 59 | describe 'isOctalDigit', -> 60 | it 'returns true if provided code is octal digit', -> 61 | for ch in [0..7] 62 | expect(esutils.code.isOctalDigit((ch + '').charCodeAt(0))).to.be.true 63 | 64 | it 'returns false if provided code is not octal digit', -> 65 | for ch in [8..9] 66 | expect(esutils.code.isOctalDigit((ch + '').charCodeAt(0))).to.be.false 67 | 68 | for code in ['a'.charCodeAt(0)..'z'.charCodeAt(0)] 69 | expect(esutils.code.isOctalDigit(code)).to.be.false 70 | 71 | for code in ['A'.charCodeAt(0)..'Z'.charCodeAt(0)] 72 | expect(esutils.code.isOctalDigit(code)).to.be.false 73 | 74 | describe 'isWhiteSpace', -> 75 | it 'returns true if provided code is white space', -> 76 | codes = [ 77 | 0x0009 # TAB 78 | 0x000B # VT 79 | 0x000C # FF 80 | 0x0020 # SP 81 | 0x00A0 # NBSP 82 | 0xFEFF # BOM 83 | 84 | # Zs 85 | 0x1680 86 | 0x2000 87 | 0x2001 88 | 0x2002 89 | 0x2003 90 | 0x2004 91 | 0x2005 92 | 0x2006 93 | 0x2007 94 | 0x2008 95 | 0x2009 96 | 0x200A 97 | 0x202F 98 | 0x205F 99 | 0x3000 100 | ] 101 | for code in codes 102 | expect(esutils.code.isWhiteSpace(code)).to.be.true 103 | 104 | expect(esutils.code.isWhiteSpace(0x180E)).to.be.false 105 | 106 | it 'returns false if provided code is not white space', -> 107 | for ch in [0..9] 108 | expect(esutils.code.isWhiteSpace((ch + '').charCodeAt(0))).to.be.false 109 | 110 | for code in ['a'.charCodeAt(0)..'z'.charCodeAt(0)] 111 | expect(esutils.code.isWhiteSpace(code)).to.be.false 112 | 113 | for code in ['A'.charCodeAt(0)..'Z'.charCodeAt(0)] 114 | expect(esutils.code.isWhiteSpace(code)).to.be.false 115 | 116 | describe 'isLineTerminator', -> 117 | it 'returns true if provided code is line terminator', -> 118 | codes = [ 119 | 0x000A 120 | 0x000D 121 | 0x2028 122 | 0x2029 123 | ] 124 | for code in codes 125 | expect(esutils.code.isLineTerminator(code)).to.be.true 126 | 127 | it 'returns false if provided code is not line terminator', -> 128 | for ch in [0..9] 129 | expect(esutils.code.isLineTerminator((ch + '').charCodeAt(0))).to.be.false 130 | 131 | for code in ['a'.charCodeAt(0)..'z'.charCodeAt(0)] 132 | expect(esutils.code.isLineTerminator(code)).to.be.false 133 | 134 | for code in ['A'.charCodeAt(0)..'Z'.charCodeAt(0)] 135 | expect(esutils.code.isLineTerminator(code)).to.be.false 136 | 137 | describe 'isIdentifierStartES5', -> 138 | it 'returns true if provided code can be a start of Identifier in ES5', -> 139 | characters = ['a', '_', '$', 'ゆ'] 140 | for code in characters.map((ch) -> ch.charCodeAt(0)) 141 | expect(esutils.code.isIdentifierStartES5(code)).to.be.true 142 | 143 | it 'returns false if provided code cannot be a start of Identifier in ES5', -> 144 | for ch in [0..9] 145 | expect(esutils.code.isIdentifierStartES5((ch + '').charCodeAt(0))).to.be.false 146 | 147 | describe 'isIdentifierPartES5', -> 148 | it 'returns true if provided code can be a part of Identifier in ES5', -> 149 | characters = ['a', '_', '$', 'ゆ'] 150 | for code in characters.map((ch) -> ch.charCodeAt(0)) 151 | expect(esutils.code.isIdentifierPartES5(code)).to.be.true 152 | 153 | for ch in [0..9] 154 | expect(esutils.code.isIdentifierPartES5((ch + '').charCodeAt(0))).to.be.true 155 | 156 | it 'returns false if provided code cannot be a part of Identifier in ES5', -> 157 | expect(esutils.code.isIdentifierPartES5('+'.charCodeAt(0))).to.be.false 158 | expect(esutils.code.isIdentifierPartES5('-'.charCodeAt(0))).to.be.false 159 | 160 | describe 'isIdentifierStartES6', -> 161 | it 'returns true if provided code can be a start of Identifier in ES6', -> 162 | characters = ['a', '_', '$', 'ゆ', '\u0AF9'] 163 | for code in characters.map((ch) -> ch.charCodeAt(0)) 164 | expect(esutils.code.isIdentifierStartES6(code)).to.be.true 165 | 166 | it 'returns false if provided code cannot be a start of Identifier in ES6', -> 167 | for ch in [0..9] 168 | expect(esutils.code.isIdentifierStartES6((ch + '').charCodeAt(0))).to.be.false 169 | 170 | describe 'isIdentifierPartES6', -> 171 | it 'returns true if provided code can be a part of Identifier in ES6', -> 172 | characters = ['a', '_', '$', 'ゆ'] 173 | for code in characters.map((ch) -> ch.charCodeAt(0)) 174 | expect(esutils.code.isIdentifierPartES6(code)).to.be.true 175 | 176 | for ch in [0..9] 177 | expect(esutils.code.isIdentifierPartES6((ch + '').charCodeAt(0))).to.be.true 178 | 179 | it 'supports astral symbols', -> 180 | expect(esutils.code.isIdentifierPartES6(0xE01D5)).to.be.true 181 | 182 | it 'returns false if provided code cannot be a part of Identifier in ES6', -> 183 | expect(esutils.code.isIdentifierPartES6('+'.charCodeAt(0))).to.be.false 184 | expect(esutils.code.isIdentifierPartES6('-'.charCodeAt(0))).to.be.false 185 | -------------------------------------------------------------------------------- /test/keyword.coffee: -------------------------------------------------------------------------------- 1 | # Copyright (C) 2013 Yusuke Suzuki 2 | # 3 | # Redistribution and use in source and binary forms, with or without 4 | # modification, are permitted provided that the following conditions are 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 copyright 9 | # notice, this list of conditions and the following disclaimer in the 10 | # documentation and/or other materials provided with the distribution. 11 | # 12 | # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 13 | # AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 14 | # IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 15 | # ARE DISCLAIMED. IN NO EVENT SHALL BE LIABLE FOR ANY 16 | # DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 17 | # (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 18 | # LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 19 | # ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 20 | # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 21 | # THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 22 | 23 | 'use strict' 24 | 25 | expect = require('chai').expect 26 | esutils = require '../' 27 | 28 | KW = [ 29 | 'if' 30 | 'in' 31 | 'do' 32 | 'var' 33 | 'for' 34 | 'new' 35 | 'try' 36 | 'this' 37 | 'else' 38 | 'case' 39 | 'void' 40 | 'with' 41 | 'enum' 42 | 'while' 43 | 'break' 44 | 'catch' 45 | 'throw' 46 | 'const' 47 | 'class' 48 | 'super' 49 | 'return' 50 | 'typeof' 51 | 'delete' 52 | 'switch' 53 | 'export' 54 | 'import' 55 | 'default' 56 | 'finally' 57 | 'extends' 58 | 'function' 59 | 'continue' 60 | 'debugger' 61 | 'instanceof' 62 | ] 63 | 64 | SRW = [ 65 | 'implements' 66 | 'interface' 67 | 'package' 68 | 'private' 69 | 'protected' 70 | 'public' 71 | 'static' 72 | 'let' 73 | ] 74 | 75 | describe 'keyword', -> 76 | describe 'isKeywordES6', -> 77 | it 'returns true if provided string is keyword under non-strict mode', -> 78 | for word in KW 79 | expect(esutils.keyword.isKeywordES6(word, no)).to.be.true 80 | 81 | expect(esutils.keyword.isKeywordES6('yield', no)).to.be.true 82 | 83 | it 'returns false if provided string is not keyword under non-strict mode', -> 84 | words = [ 85 | 'hello' 86 | '20' 87 | '$' 88 | 'ゆゆ式' 89 | ] 90 | 91 | for word in words 92 | expect(esutils.keyword.isKeywordES6(word, no)).to.be.false 93 | 94 | for word in SRW 95 | expect(esutils.keyword.isKeywordES6(word, no)).to.be.false 96 | 97 | it 'returns true if provided string is keyword under strict mode', -> 98 | for word in KW 99 | expect(esutils.keyword.isKeywordES6(word, yes)).to.be.true 100 | 101 | expect(esutils.keyword.isKeywordES6('yield', yes)).to.be.true 102 | 103 | for word in SRW 104 | expect(esutils.keyword.isKeywordES6(word, yes)).to.be.true 105 | 106 | 107 | it 'returns false if provided string is not keyword under strict mode', -> 108 | words = [ 109 | 'hello' 110 | '20' 111 | '$' 112 | 'ゆゆ式' 113 | ] 114 | 115 | for word in words 116 | expect(esutils.keyword.isKeywordES6(word, yes)).to.be.false 117 | 118 | 119 | describe 'isKeywordES5', -> 120 | it 'returns true if provided string is keyword under non-strict mode', -> 121 | for word in KW 122 | expect(esutils.keyword.isKeywordES5(word, no)).to.be.true 123 | 124 | it 'returns false if provided string is not keyword under non-strict mode', -> 125 | words = [ 126 | 'hello' 127 | '20' 128 | '$' 129 | 'ゆゆ式' 130 | ] 131 | 132 | for word in words 133 | expect(esutils.keyword.isKeywordES5(word, no)).to.be.false 134 | 135 | for word in SRW 136 | expect(esutils.keyword.isKeywordES5(word, no)).to.be.false 137 | 138 | expect(esutils.keyword.isKeywordES5('yield', no)).to.be.false 139 | 140 | it 'returns true if provided string is keyword under strict mode', -> 141 | for word in KW 142 | expect(esutils.keyword.isKeywordES5(word, yes)).to.be.true 143 | 144 | expect(esutils.keyword.isKeywordES5('yield', yes)).to.be.true 145 | 146 | for word in SRW 147 | expect(esutils.keyword.isKeywordES5(word, yes)).to.be.true 148 | 149 | 150 | it 'returns false if provided string is not keyword under strict mode', -> 151 | words = [ 152 | 'hello' 153 | '20' 154 | '$' 155 | 'ゆゆ式' 156 | ] 157 | 158 | for word in words 159 | expect(esutils.keyword.isKeywordES5(word, yes)).to.be.false 160 | 161 | 162 | describe 'isReservedWordES6', -> 163 | it 'returns true for null/boolean values', -> 164 | expect(esutils.keyword.isReservedWordES6('null', no)).to.be.true 165 | expect(esutils.keyword.isReservedWordES6('null', yes)).to.be.true 166 | expect(esutils.keyword.isReservedWordES6('true', no)).to.be.true 167 | expect(esutils.keyword.isReservedWordES6('true', yes)).to.be.true 168 | expect(esutils.keyword.isReservedWordES6('false', no)).to.be.true 169 | expect(esutils.keyword.isReservedWordES6('false', yes)).to.be.true 170 | 171 | # isReservedWordES6 has the same properties as isKeywordES6 172 | 173 | it 'returns true if provided string is keyword under non-strict mode', -> 174 | for word in KW 175 | expect(esutils.keyword.isReservedWordES6(word, no)).to.be.true 176 | 177 | expect(esutils.keyword.isReservedWordES6('yield', no)).to.be.true 178 | 179 | it 'returns false if provided string is not keyword under non-strict mode', -> 180 | words = [ 181 | 'hello' 182 | '20' 183 | '$' 184 | 'ゆゆ式' 185 | ] 186 | 187 | for word in words 188 | expect(esutils.keyword.isReservedWordES6(word, no)).to.be.false 189 | 190 | for word in SRW 191 | expect(esutils.keyword.isReservedWordES6(word, no)).to.be.false 192 | 193 | it 'returns true if provided string is keyword under strict mode', -> 194 | for word in KW 195 | expect(esutils.keyword.isReservedWordES6(word, yes)).to.be.true 196 | 197 | expect(esutils.keyword.isReservedWordES6('yield', yes)).to.be.true 198 | 199 | for word in SRW 200 | expect(esutils.keyword.isReservedWordES6(word, yes)).to.be.true 201 | 202 | 203 | it 'returns false if provided string is not keyword under strict mode', -> 204 | words = [ 205 | 'hello' 206 | '20' 207 | '$' 208 | 'ゆゆ式' 209 | ] 210 | 211 | for word in words 212 | expect(esutils.keyword.isReservedWordES6(word, yes)).to.be.false 213 | 214 | 215 | describe 'isReservedWordES5', -> 216 | it 'returns true for null/boolean values', -> 217 | expect(esutils.keyword.isReservedWordES5('null', no)).to.be.true 218 | expect(esutils.keyword.isReservedWordES5('null', yes)).to.be.true 219 | expect(esutils.keyword.isReservedWordES5('true', no)).to.be.true 220 | expect(esutils.keyword.isReservedWordES5('true', yes)).to.be.true 221 | expect(esutils.keyword.isReservedWordES5('false', no)).to.be.true 222 | expect(esutils.keyword.isReservedWordES5('false', yes)).to.be.true 223 | 224 | # isReservedWordES5 has the same properties as isKeywordES5 225 | 226 | it 'returns true if provided string is keyword under non-strict mode', -> 227 | for word in KW 228 | expect(esutils.keyword.isReservedWordES5(word, no)).to.be.true 229 | 230 | it 'returns false if provided string is not keyword under non-strict mode', -> 231 | words = [ 232 | 'hello' 233 | '20' 234 | '$' 235 | 'ゆゆ式' 236 | ] 237 | 238 | for word in words 239 | expect(esutils.keyword.isReservedWordES5(word, no)).to.be.false 240 | 241 | for word in SRW 242 | expect(esutils.keyword.isReservedWordES5(word, no)).to.be.false 243 | 244 | expect(esutils.keyword.isReservedWordES5('yield', no)).to.be.false 245 | 246 | it 'returns true if provided string is keyword under strict mode', -> 247 | for word in KW 248 | expect(esutils.keyword.isReservedWordES5(word, yes)).to.be.true 249 | 250 | expect(esutils.keyword.isReservedWordES5('yield', yes)).to.be.true 251 | 252 | for word in SRW 253 | expect(esutils.keyword.isReservedWordES5(word, yes)).to.be.true 254 | 255 | 256 | it 'returns false if provided string is not keyword under strict mode', -> 257 | words = [ 258 | 'hello' 259 | '20' 260 | '$' 261 | 'ゆゆ式' 262 | ] 263 | 264 | for word in words 265 | expect(esutils.keyword.isReservedWordES5(word, yes)).to.be.false 266 | 267 | 268 | describe 'isRestrictedWord', -> 269 | it 'returns true if provided string is "eval" or "arguments"', -> 270 | expect(esutils.keyword.isRestrictedWord('eval')).to.be.true 271 | expect(esutils.keyword.isRestrictedWord('arguments')).to.be.true 272 | 273 | it 'returns false if provided string is not "eval" or "arguments"', -> 274 | words = [ 275 | 'hello' 276 | '20' 277 | '$' 278 | 'ゆゆ式' 279 | ] 280 | 281 | for word in words 282 | expect(esutils.keyword.isRestrictedWord(word)).to.be.false 283 | 284 | 285 | describe 'isIdentifierName', -> 286 | it 'returns false if provided string is empty', -> 287 | expect(esutils.keyword.isIdentifierNameES5('')).to.be.false 288 | expect(esutils.keyword.isIdentifierNameES6('')).to.be.false 289 | 290 | it 'returns true if provided string is IdentifierName', -> 291 | words = [ 292 | 'hello' 293 | '$' 294 | 'ゆゆ式' 295 | '$20' 296 | 'hello20' 297 | '_' 298 | 'if' 299 | ] 300 | 301 | for word in words 302 | expect(esutils.keyword.isIdentifierNameES5(word)).to.be.true 303 | expect(esutils.keyword.isIdentifierNameES6(word)).to.be.true 304 | 305 | 306 | it 'returns false if provided string is not IdentifierName', -> 307 | words = [ 308 | '+hello' 309 | '0$' 310 | '-ゆゆ式' 311 | '#_' 312 | '_#' 313 | ] 314 | 315 | for word in words 316 | expect(esutils.keyword.isIdentifierNameES5(word)).to.be.false 317 | expect(esutils.keyword.isIdentifierNameES6(word)).to.be.false 318 | 319 | it 'supports astral symbols', -> 320 | expect(esutils.keyword.isIdentifierNameES6('x\uDB40\uDDD5')).to.be.true 321 | 322 | 323 | describe 'isIdentifierES5', -> 324 | it 'returns false if provided string is empty', -> 325 | expect(esutils.keyword.isIdentifierES5('')).to.be.false 326 | 327 | it 'returns true if provided string is Identifier', -> 328 | words = [ 329 | 'hello' 330 | '$' 331 | 'ゆゆ式' 332 | '$20' 333 | 'hello20' 334 | '_' 335 | ] 336 | 337 | for word in words 338 | expect(esutils.keyword.isIdentifierES5(word)).to.be.true 339 | 340 | expect(esutils.keyword.isIdentifierES5('yield', no)).to.be.true 341 | expect(esutils.keyword.isIdentifierES5('let', no)).to.be.true 342 | 343 | it 'returns false if provided string is not Identifier', -> 344 | words = [ 345 | '+hello' 346 | '0$' 347 | '-ゆゆ式' 348 | '#_' 349 | '_#' 350 | 'if' 351 | 'null' 352 | 'true' 353 | 'false' 354 | ] 355 | 356 | for word in words 357 | expect(esutils.keyword.isIdentifierES5(word)).to.be.false 358 | 359 | expect(esutils.keyword.isIdentifierES5('yield', yes)).to.be.false 360 | expect(esutils.keyword.isIdentifierES5('let', yes)).to.be.false 361 | 362 | 363 | describe 'isIdentifierES6', -> 364 | it 'returns false if provided string is empty', -> 365 | expect(esutils.keyword.isIdentifierES6('')).to.be.false 366 | 367 | it 'returns true if provided string is Identifier', -> 368 | words = [ 369 | 'hello' 370 | '$' 371 | 'ゆゆ式' 372 | '$20' 373 | 'hello20' 374 | '_' 375 | ] 376 | 377 | for word in words 378 | expect(esutils.keyword.isIdentifierES6(word)).to.be.true 379 | 380 | expect(esutils.keyword.isIdentifierES6('let', no)).to.be.true 381 | 382 | it 'returns false if provided string is not Identifier', -> 383 | words = [ 384 | '+hello' 385 | '0$' 386 | '-ゆゆ式' 387 | '#_' 388 | '_#' 389 | 'if' 390 | 'null' 391 | 'true' 392 | 'false' 393 | ] 394 | 395 | for word in words 396 | expect(esutils.keyword.isIdentifierES6(word)).to.be.false 397 | 398 | expect(esutils.keyword.isIdentifierES6('yield', no)).to.be.false 399 | expect(esutils.keyword.isIdentifierES6('yield', yes)).to.be.false 400 | expect(esutils.keyword.isIdentifierES6('let', yes)).to.be.false 401 | -------------------------------------------------------------------------------- /tools/generate-identifier-regex.js: -------------------------------------------------------------------------------- 1 | // Based on https://gist.github.com/mathiasbynens/6334847 by @mathias 2 | 'use strict'; 3 | 4 | const regenerate = require('regenerate'); 5 | 6 | // Which Unicode version should be used? 7 | const version = '9.0.0'; 8 | 9 | // Set up a shorthand function to import Unicode data. 10 | const get = function(what) { 11 | return require('unicode-' + version + '/' + what + '/code-points'); 12 | }; 13 | 14 | // Get the Unicode categories needed to construct the ES5 regex. 15 | const Lu = get('General_Category/Uppercase_Letter'); 16 | const Ll = get('General_Category/Lowercase_Letter'); 17 | const Lt = get('General_Category/Titlecase_Letter'); 18 | const Lm = get('General_Category/Modifier_Letter'); 19 | const Lo = get('General_Category/Other_Letter'); 20 | const Nl = get('General_Category/Letter_Number'); 21 | const Mn = get('General_Category/Nonspacing_Mark'); 22 | const Mc = get('General_Category/Spacing_Mark'); 23 | const Nd = get('General_Category/Decimal_Number'); 24 | const Pc = get('General_Category/Connector_Punctuation'); 25 | 26 | const es5regexes = (function() { // ES 5.1 27 | // http://mathiasbynens.be/notes/javascript-identifiers#valid-identifier-names 28 | const identifierStart = regenerate() 29 | .add(Lu, Ll, Lt, Lm, Lo, Nl) 30 | .removeRange(0x010000, 0x10FFFF) // remove astral symbols 31 | .removeRange(0x00, 0x7F); // remove ASCII symbols (esutils-specific) 32 | const identifierStartCodePoints = identifierStart.toArray(); 33 | const identifierPart = regenerate(identifierStartCodePoints) 34 | .add('\u200C', '\u200D', Mn, Mc, Nd, Pc) 35 | .removeRange(0x010000, 0x10FFFF) // remove astral symbols 36 | .removeRange(0x00, 0x7F); // remove ASCII symbols (esutils-specific) 37 | return { 38 | 'NonAsciiIdentifierStart': '/' + identifierStart + '/', 39 | 'NonAsciiIdentifierPart': '/' + identifierPart + '/', 40 | }; 41 | }()); 42 | 43 | // Get the Unicode properties needed to construct the ES6 regex. 44 | const ID_Start = get('Binary_Property/ID_Start'); 45 | const ID_Continue = get('Binary_Property/ID_Continue'); 46 | const Other_ID_Start = get('Binary_Property/Other_ID_Start'); 47 | 48 | const es6regexes = (function() { 49 | // http://ecma-international.org/ecma-262/6.0/#sec-identifier-names-static-semantics-early-errors 50 | // http://unicode.org/reports/tr31/#Default_Identifier_Syntax 51 | // https://bugs.ecmascript.org/show_bug.cgi?id=2717#c0 52 | const identifierStart = regenerate(ID_Start) 53 | // Note: this already includes `Other_ID_Start`. http://git.io/wRCAfQ 54 | .removeRange(0x00, 0x7F); // remove ASCII symbols (esutils-specific) 55 | const identifierPart = regenerate(ID_Continue) 56 | // Note: `ID_Continue` already includes `Other_ID_Continue`. http://git.io/wRCAfQ 57 | .add(Other_ID_Start) 58 | .add('\u200C', '\u200D') 59 | .removeRange(0x00, 0x7F); // remove ASCII symbols (esutils-specific) 60 | 61 | return { 62 | 'NonAsciiIdentifierStart': '/' + identifierStart + '/', 63 | 'NonAsciiIdentifierPart': '/' + identifierPart + '/', 64 | }; 65 | }()); 66 | 67 | console.log( 68 | '// ECMAScript 5.1/Unicode v%s NonAsciiIdentifierStart:\n%s\n', 69 | version, 70 | es5regexes.NonAsciiIdentifierStart 71 | ); 72 | console.log( 73 | '// ECMAScript 5.1/Unicode v%s NonAsciiIdentifierPart:\n%s\n', 74 | version, 75 | es5regexes.NonAsciiIdentifierPart 76 | ); 77 | 78 | console.log( 79 | '// ECMAScript 6/Unicode v%s NonAsciiIdentifierStart:\n%s\n', 80 | version, 81 | es6regexes.NonAsciiIdentifierStart 82 | ); 83 | console.log( 84 | '// ECMAScript 6/Unicode v%s NonAsciiIdentifierPart:\n%s', 85 | version, 86 | es6regexes.NonAsciiIdentifierPart 87 | ); 88 | --------------------------------------------------------------------------------