| 1 | /**
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| 2 | * Disallows spaces after commas
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| 3 | *
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| 4 | * Types: `Boolean` or `Object`
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| 5 | *
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| 6 | * Values:
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| 7 | * - `Boolean`: `true` to disallow any spaces after any comma
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| 8 | * - `Object`: `"allExcept"` array of exceptions
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| 9 | * - `"sparseArrays"` to allow spaces in place of absent values in sparse arrays
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| 10 | *
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| 11 | * #### Example
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| 12 | *
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| 13 | * ```js
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| 14 | * "disallowSpaceAfterComma": true
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| 15 | * ```
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| 16 | * ```js
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| 17 | * "disallowSpaceAfterComma" {"allExcept": ["sparseArrays"]}
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| 18 | * ```
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| 19 | *
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| 20 | * ##### Valid for mode `true`
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| 21 | *
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| 22 | * ```js
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| 23 | * [a,b,c];
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| 24 | * ```
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| 25 | *
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| 26 | * ##### Invalid for mode `true`
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| 27 | *
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| 28 | * ```js
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| 29 | * [a, b, c];
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| 30 | * ```
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| 31 | * ```js
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| 32 | * [a,b, , ,c];
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| 33 | * ```
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| 34 | *
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| 35 | * ##### Valid for mode `{"allExcept": ["sparseArrays"]}`
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| 36 | *
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| 37 | * ```js
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| 38 | * [a,b, , ,c];
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| 39 | * ```
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| 40 | *
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| 41 | * ##### Invalid for mode `{"allExcept": ["sparseArrays"]}`
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| 42 | *
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| 43 | * ```js
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| 44 | * [a, b, , , c];
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| 45 | * ``
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| 46 | */
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| 47 |
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| 48 | var assert = require('assert');
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| 49 |
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| 50 | module.exports = function() {
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| 51 | };
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| 52 |
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| 53 | module.exports.prototype = {
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| 54 |
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| 55 | configure: function(options) {
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| 56 | if (typeof options !== 'object') {
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| 57 | assert(
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| 58 | options === true,
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| 59 | this.getOptionName() + ' option requires true value or an object'
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| 60 | );
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| 61 | var _options = {allExcept: []};
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| 62 | return this.configure(_options);
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| 63 | }
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| 64 |
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| 65 | assert(
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| 66 | Array.isArray(options.allExcept),
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| 67 | ' property `allExcept` in ' + this.getOptionName() + ' should be an array of strings'
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| 68 | );
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| 69 | this._exceptSparseArrays = options.allExcept.indexOf('sparseArrays') >= 0;
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| 70 | },
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| 71 |
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| 72 | getOptionName: function() {
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| 73 | return 'disallowSpaceAfterComma';
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| 74 | },
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| 75 |
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| 76 | check: function(file, errors) {
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| 77 | var exceptSparseArrays = this._exceptSparseArrays;
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| 78 | file.iterateTokensByTypeAndValue('Punctuator', ',', function(token) {
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| 79 | var nextToken = file.getNextToken(token);
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| 80 |
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| 81 | if (exceptSparseArrays && nextToken.value === ',') {
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| 82 | return;
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| 83 | }
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| 84 | errors.assert.noWhitespaceBetween({
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| 85 | token: token,
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| 86 | nextToken: nextToken,
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| 87 | message: 'Illegal space after comma'
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| 88 | });
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| 89 | });
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| 90 | }
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| 91 |
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| 92 | };
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