d9b8758f47
PR-URL: https://github.com/nodejs/node/pull/6132 Reviewed-By: Brian White <mscdex@mscdex.net> Reviewed-By: Jeremiah Senkpiel <fishrock123@rocketmail.com> Reviewed-By: Rich Trott <rtrott@gmail.com> Reviewed-By: thefourtheye <thechargingvolcano@gmail.com>
63 lines
1.8 KiB
JavaScript
63 lines
1.8 KiB
JavaScript
/**
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* @fileoverview Rule to flag references to undeclared variables.
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* @author Mark Macdonald
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* @copyright 2015 Nicholas C. Zakas. All rights reserved.
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* @copyright 2013 Mark Macdonald. All rights reserved.
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*/
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"use strict";
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//------------------------------------------------------------------------------
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// Helpers
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//------------------------------------------------------------------------------
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/**
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* Checks if the given node is the argument of a typeof operator.
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* @param {ASTNode} node The AST node being checked.
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* @returns {boolean} Whether or not the node is the argument of a typeof operator.
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*/
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function hasTypeOfOperator(node) {
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var parent = node.parent;
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return parent.type === "UnaryExpression" && parent.operator === "typeof";
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}
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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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var options = context.options[0];
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var considerTypeOf = options && options.typeof === true || false;
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return {
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"Program:exit": function(/* node */) {
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var globalScope = context.getScope();
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globalScope.through.forEach(function(ref) {
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var identifier = ref.identifier;
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if (!considerTypeOf && hasTypeOfOperator(identifier)) {
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return;
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}
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context.report({
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node: identifier,
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message: "'{{name}}' is not defined.",
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data: identifier
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});
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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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{
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"type": "object",
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"properties": {
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"typeof": {
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"type": "boolean"
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}
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},
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"additionalProperties": false
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}
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];
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