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Diffstat (limited to 'tools/node_modules/eslint/node_modules/js-tokens')
4 files changed, 330 insertions, 0 deletions
diff --git a/tools/node_modules/eslint/node_modules/js-tokens/LICENSE b/tools/node_modules/eslint/node_modules/js-tokens/LICENSE new file mode 100644 index 0000000000..748f42e87d --- /dev/null +++ b/tools/node_modules/eslint/node_modules/js-tokens/LICENSE @@ -0,0 +1,21 @@ +The MIT License (MIT) + +Copyright (c) 2014, 2015, 2016, 2017 Simon Lydell + +Permission is hereby granted, free of charge, to any person obtaining a copy +of this software and associated documentation files (the "Software"), to deal +in the Software without restriction, including without limitation the rights +to use, copy, modify, merge, publish, distribute, sublicense, and/or sell +copies of the Software, and to permit persons to whom the Software is +furnished to do so, subject to the following conditions: + +The above copyright notice and this permission notice shall be included in +all copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN +THE SOFTWARE. diff --git a/tools/node_modules/eslint/node_modules/js-tokens/index.js b/tools/node_modules/eslint/node_modules/js-tokens/index.js new file mode 100644 index 0000000000..a3c8a0d7bd --- /dev/null +++ b/tools/node_modules/eslint/node_modules/js-tokens/index.js @@ -0,0 +1,23 @@ +// Copyright 2014, 2015, 2016, 2017 Simon Lydell +// License: MIT. (See LICENSE.) + +Object.defineProperty(exports, "__esModule", { + value: true +}) + +// This regex comes from regex.coffee, and is inserted here by generate-index.js +// (run `npm run build`). +exports.default = /((['"])(?:(?!\2|\\).|\\(?:\r\n|[\s\S]))*(\2)?|`(?:[^`\\$]|\\[\s\S]|\$(?!\{)|\$\{(?:[^{}]|\{[^}]*\}?)*\}?)*(`)?)|(\/\/.*)|(\/\*(?:[^*]|\*(?!\/))*(\*\/)?)|(\/(?!\*)(?:\[(?:(?![\]\\]).|\\.)*\]|(?![\/\]\\]).|\\.)+\/(?:(?!\s*(?:\b|[\u0080-\uFFFF$\\'"~({]|[+\-!](?!=)|\.?\d))|[gmiyu]{1,5}\b(?![\u0080-\uFFFF$\\]|\s*(?:[+\-*%&|^<>!=?({]|\/(?![\/*])))))|(0[xX][\da-fA-F]+|0[oO][0-7]+|0[bB][01]+|(?:\d*\.\d+|\d+\.?)(?:[eE][+-]?\d+)?)|((?!\d)(?:(?!\s)[$\w\u0080-\uFFFF]|\\u[\da-fA-F]{4}|\\u\{[\da-fA-F]+\})+)|(--|\+\+|&&|\|\||=>|\.{3}|(?:[+\-\/%&|^]|\*{1,2}|<{1,2}|>{1,3}|!=?|={1,2})=?|[?~.,:;[\](){}])|(\s+)|(^$|[\s\S])/g + +exports.matchToToken = function(match) { + var token = {type: "invalid", value: match[0]} + if (match[ 1]) token.type = "string" , token.closed = !!(match[3] || match[4]) + else if (match[ 5]) token.type = "comment" + else if (match[ 6]) token.type = "comment", token.closed = !!match[7] + else if (match[ 8]) token.type = "regex" + else if (match[ 9]) token.type = "number" + else if (match[10]) token.type = "name" + else if (match[11]) token.type = "punctuator" + else if (match[12]) token.type = "whitespace" + return token +} diff --git a/tools/node_modules/eslint/node_modules/js-tokens/package.json b/tools/node_modules/eslint/node_modules/js-tokens/package.json new file mode 100644 index 0000000000..11a804e1bf --- /dev/null +++ b/tools/node_modules/eslint/node_modules/js-tokens/package.json @@ -0,0 +1,64 @@ +{ + "_from": "js-tokens@^3.0.2", + "_id": "js-tokens@3.0.2", + "_inBundle": false, + "_integrity": "sha1-mGbfOVECEw449/mWvOtlRDIJwls=", + "_location": "/eslint/js-tokens", + "_phantomChildren": {}, + "_requested": { + "type": "range", + "registry": true, + "raw": "js-tokens@^3.0.2", + "name": "js-tokens", + "escapedName": "js-tokens", + "rawSpec": "^3.0.2", + "saveSpec": null, + "fetchSpec": "^3.0.2" + }, + "_requiredBy": [ + "/eslint/babel-code-frame" + ], + "_resolved": "https://registry.npmjs.org/js-tokens/-/js-tokens-3.0.2.tgz", + "_shasum": "9866df395102130e38f7f996bceb65443209c25b", + "_spec": "js-tokens@^3.0.2", + "_where": "/Users/cjihrig/iojs/node/tools/eslint-tmp/node_modules/eslint/node_modules/babel-code-frame", + "author": { + "name": "Simon Lydell" + }, + "bugs": { + "url": "https://github.com/lydell/js-tokens/issues" + }, + "bundleDependencies": false, + "deprecated": false, + "description": "A regex that tokenizes JavaScript.", + "devDependencies": { + "coffee-script": "~1.12.6", + "esprima": "^4.0.0", + "everything.js": "^1.0.3", + "mocha": "^3.4.2" + }, + "files": [ + "index.js" + ], + "homepage": "https://github.com/lydell/js-tokens#readme", + "keywords": [ + "JavaScript", + "js", + "token", + "tokenize", + "regex" + ], + "license": "MIT", + "name": "js-tokens", + "repository": { + "type": "git", + "url": "git+https://github.com/lydell/js-tokens.git" + }, + "scripts": { + "build": "node generate-index.js", + "dev": "npm run build && npm test", + "esprima-compare": "node esprima-compare ./index.js everything.js/es5.js", + "test": "mocha --ui tdd" + }, + "version": "3.0.2" +} diff --git a/tools/node_modules/eslint/node_modules/js-tokens/readme.md b/tools/node_modules/eslint/node_modules/js-tokens/readme.md new file mode 100644 index 0000000000..5c93a88852 --- /dev/null +++ b/tools/node_modules/eslint/node_modules/js-tokens/readme.md @@ -0,0 +1,222 @@ +Overview [](https://travis-ci.org/lydell/js-tokens) +======== + +A regex that tokenizes JavaScript. + +```js +var jsTokens = require("js-tokens").default + +var jsString = "var foo=opts.foo;\n..." + +jsString.match(jsTokens) +// ["var", " ", "foo", "=", "opts", ".", "foo", ";", "\n", ...] +``` + + +Installation +============ + +`npm install js-tokens` + +```js +import jsTokens from "js-tokens" +// or: +var jsTokens = require("js-tokens").default +``` + + +Usage +===== + +### `jsTokens` ### + +A regex with the `g` flag that matches JavaScript tokens. + +The regex _always_ matches, even invalid JavaScript and the empty string. + +The next match is always directly after the previous. + +### `var token = matchToToken(match)` ### + +```js +import {matchToToken} from "js-tokens" +// or: +var matchToToken = require("js-tokens").matchToToken +``` + +Takes a `match` returned by `jsTokens.exec(string)`, and returns a `{type: +String, value: String}` object. The following types are available: + +- string +- comment +- regex +- number +- name +- punctuator +- whitespace +- invalid + +Multi-line comments and strings also have a `closed` property indicating if the +token was closed or not (see below). + +Comments and strings both come in several flavors. To distinguish them, check if +the token starts with `//`, `/*`, `'`, `"` or `` ` ``. + +Names are ECMAScript IdentifierNames, that is, including both identifiers and +keywords. You may use [is-keyword-js] to tell them apart. + +Whitespace includes both line terminators and other whitespace. + +[is-keyword-js]: https://github.com/crissdev/is-keyword-js + + +ECMAScript support +================== + +The intention is to always support the latest stable ECMAScript version. + +If adding support for a newer version requires changes, a new version with a +major verion bump will be released. + +Currently, [ECMAScript 2017] is supported. + +[ECMAScript 2017]: https://www.ecma-international.org/ecma-262/8.0/index.html + + +Invalid code handling +===================== + +Unterminated strings are still matched as strings. JavaScript strings cannot +contain (unescaped) newlines, so unterminated strings simply end at the end of +the line. Unterminated template strings can contain unescaped newlines, though, +so they go on to the end of input. + +Unterminated multi-line comments are also still matched as comments. They +simply go on to the end of the input. + +Unterminated regex literals are likely matched as division and whatever is +inside the regex. + +Invalid ASCII characters have their own capturing group. + +Invalid non-ASCII characters are treated as names, to simplify the matching of +names (except unicode spaces which are treated as whitespace). + +Regex literals may contain invalid regex syntax. They are still matched as +regex literals. They may also contain repeated regex flags, to keep the regex +simple. + +Strings may contain invalid escape sequences. + + +Limitations +=========== + +Tokenizing JavaScript using regexes—in fact, _one single regex_—won’t be +perfect. But that’s not the point either. + +You may compare jsTokens with [esprima] by using `esprima-compare.js`. +See `npm run esprima-compare`! + +[esprima]: http://esprima.org/ + +### Template string interpolation ### + +Template strings are matched as single tokens, from the starting `` ` `` to the +ending `` ` ``, including interpolations (whose tokens are not matched +individually). + +Matching template string interpolations requires recursive balancing of `{` and +`}`—something that JavaScript regexes cannot do. Only one level of nesting is +supported. + +### Division and regex literals collision ### + +Consider this example: + +```js +var g = 9.82 +var number = bar / 2/g + +var regex = / 2/g +``` + +A human can easily understand that in the `number` line we’re dealing with +division, and in the `regex` line we’re dealing with a regex literal. How come? +Because humans can look at the whole code to put the `/` characters in context. +A JavaScript regex cannot. It only sees forwards. + +When the `jsTokens` regex scans throught the above, it will see the following +at the end of both the `number` and `regex` rows: + +```js +/ 2/g +``` + +It is then impossible to know if that is a regex literal, or part of an +expression dealing with division. + +Here is a similar case: + +```js +foo /= 2/g +foo(/= 2/g) +``` + +The first line divides the `foo` variable with `2/g`. The second line calls the +`foo` function with the regex literal `/= 2/g`. Again, since `jsTokens` only +sees forwards, it cannot tell the two cases apart. + +There are some cases where we _can_ tell division and regex literals apart, +though. + +First off, we have the simple cases where there’s only one slash in the line: + +```js +var foo = 2/g +foo /= 2 +``` + +Regex literals cannot contain newlines, so the above cases are correctly +identified as division. Things are only problematic when there are more than +one non-comment slash in a single line. + +Secondly, not every character is a valid regex flag. + +```js +var number = bar / 2/e +``` + +The above example is also correctly identified as division, because `e` is not a +valid regex flag. I initially wanted to future-proof by allowing `[a-zA-Z]*` +(any letter) as flags, but it is not worth it since it increases the amount of +ambigous cases. So only the standard `g`, `m`, `i`, `y` and `u` flags are +allowed. This means that the above example will be identified as division as +long as you don’t rename the `e` variable to some permutation of `gmiyu` 1 to 5 +characters long. + +Lastly, we can look _forward_ for information. + +- If the token following what looks like a regex literal is not valid after a + regex literal, but is valid in a division expression, then the regex literal + is treated as division instead. For example, a flagless regex cannot be + followed by a string, number or name, but all of those three can be the + denominator of a division. +- Generally, if what looks like a regex literal is followed by an operator, the + regex literal is treated as division instead. This is because regexes are + seldomly used with operators (such as `+`, `*`, `&&` and `==`), but division + could likely be part of such an expression. + +Please consult the regex source and the test cases for precise information on +when regex or division is matched (should you need to know). In short, you +could sum it up as: + +If the end of a statement looks like a regex literal (even if it isn’t), it +will be treated as one. Otherwise it should work as expected (if you write sane +code). + + +License +======= + +[MIT](LICENSE). |