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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>
26 lines
672 B
JavaScript
26 lines
672 B
JavaScript
/**
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* @fileoverview A rule to disallow negated left operands of the `in` operator
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* @author Michael Ficarra
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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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return {
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"BinaryExpression": function(node) {
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if (node.operator === "in" && node.left.type === "UnaryExpression" && node.left.operator === "!") {
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context.report(node, "The `in` expression's left operand is negated");
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}
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}
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};
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};
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module.exports.schema = [];
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