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50 lines
1.4 KiB
50 lines
1.4 KiB
/**
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* @fileoverview Rule to flag variable leak in CatchClauses in IE 8 and earlier
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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 paramIsShadowing(scope, name) {
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var found = scope.variables.some(function(variable) {
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return variable.name === name;
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});
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if (found) {
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return true;
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}
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if (scope.upper) {
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return paramIsShadowing(scope.upper, name);
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}
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return false;
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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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"CatchClause": function(node) {
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var scope = context.getScope();
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if (paramIsShadowing(scope, node.param.name)) {
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context.report(node, "Value of '{{name}}' may be overwritten in IE 8 and earlier.",
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{ name: node.param.name });
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}
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}
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};
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};
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