d91e10b3bd
PR-URL: https://github.com/nodejs/io.js/pull/2072 Reviewed-By: Yosuke Furukawa <yosuke.furukawa@gmail.com> Reviewed-by: Colin Ihrig <cjihrig@gmail.com> Reviewed-By: Alex Kocharin <alex@kocharin.ru>
45 lines
1.3 KiB
JavaScript
45 lines
1.3 KiB
JavaScript
/**
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* @fileoverview Rule to flag trailing commas in object literals.
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* @author Ian Christian Myers
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*/
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"use strict";
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//------------------------------------------------------------------------------
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// Rule Definition
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//------------------------------------------------------------------------------
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module.exports = function(context) {
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//-------------------------------------------------------------------------
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// Helpers
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//-------------------------------------------------------------------------
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function checkForTrailingComma(node) {
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var items = node.properties || node.elements,
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length = items.length,
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lastItem, penultimateToken;
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if (length) {
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lastItem = items[length - 1];
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if (lastItem) {
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penultimateToken = context.getLastToken(node, 1);
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if (penultimateToken.value === ",") {
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context.report(lastItem, penultimateToken.loc.start, "Trailing comma.");
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}
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}
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}
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}
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//--------------------------------------------------------------------------
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// Public API
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//--------------------------------------------------------------------------
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return {
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"ObjectExpression": checkForTrailingComma,
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"ArrayExpression": checkForTrailingComma
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};
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};
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module.exports.schema = [];
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