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/**
* @fileoverview Rule to flag variable leak in CatchClauses in IE 8 and earlier
* @author Ian Christian Myers
*/
"use strict";
//------------------------------------------------------------------------------
// Rule Definition
//------------------------------------------------------------------------------
module.exports = function(context) {
//--------------------------------------------------------------------------
// Helpers
//--------------------------------------------------------------------------
function paramIsShadowing(scope, name) {
var found = scope.variables.some(function(variable) {
return variable.name === name;
});
if (found) {
return true;
}
if (scope.upper) {
return paramIsShadowing(scope.upper, name);
}
return false;
}
//--------------------------------------------------------------------------
// Public API
//--------------------------------------------------------------------------
return {
"CatchClause": function(node) {
var scope = context.getScope();
if (paramIsShadowing(scope, node.param.name)) {
context.report(node, "Value of '{{name}}' may be overwritten in IE 8 and earlier.",
{ name: node.param.name });
}
}
};
};
module.exports.schema = [];
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