44 lines
1.0 KiB
JavaScript
44 lines
1.0 KiB
JavaScript
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'use strict';
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const {findVariable} = require('@eslint-community/eslint-utils');
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const getReferences = (scope, nodeOrName) => {
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const {references = []} = findVariable(scope, nodeOrName) || {};
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return references;
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};
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/**
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Check if `this`, `arguments`, or the function name is used inside of itself.
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@param {Node} functionNode - The function node.
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@param {Scope} functionScope - The scope of the function node.
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@returns {boolean}
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*/
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function isFunctionSelfUsedInside(functionNode, functionScope) {
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/* c8 ignore next 3 */
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if (functionScope.block !== functionNode) {
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throw new Error('"functionScope" should be the scope of "functionNode".');
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}
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const {type, id} = functionNode;
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if (type === 'ArrowFunctionExpression') {
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return false;
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}
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if (functionScope.thisFound) {
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return true;
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}
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if (getReferences(functionScope, 'arguments').some(({from}) => from === functionScope)) {
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return true;
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}
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if (id && getReferences(functionScope, id).length > 0) {
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return true;
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}
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return false;
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}
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module.exports = isFunctionSelfUsedInside;
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