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/**
* @fileoverview Rule to flag creation of function inside a loop
* @author Ilya Volodin
* @copyright 2013 Ilya Volodin. All rights reserved.
*/
"use strict";
//------------------------------------------------------------------------------
// Rule Definition
//------------------------------------------------------------------------------
module.exports = function(context) {
var loopNodeTypes = [
"ForStatement",
"WhileStatement",
"ForInStatement",
"ForOfStatement",
"DoWhileStatement"
];
/**
* Checks if the given node is a loop.
* @param {ASTNode} node The AST node to check.
* @returns {boolean} Whether or not the node is a loop.
*/
function isLoop(node) {
return loopNodeTypes.indexOf(node.type) > -1;
}
/**
* Reports if the given node has an ancestor node which is a loop.
* @param {ASTNode} node The AST node to check.
* @returns {boolean} Whether or not the node is within a loop.
*/
function checkForLoops(node) {
var ancestors = context.getAncestors();
if (ancestors.some(isLoop)) {
context.report(node, "Don't make functions within a loop");
}
}
return {
"ArrowFunctionExpression": checkForLoops,
"FunctionExpression": checkForLoops,
"FunctionDeclaration": checkForLoops
};
};
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