57 lines
1.8 KiB
JavaScript
57 lines
1.8 KiB
JavaScript
/**
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* @author Toru Nagashima <https://github.com/mysticatea>
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* See LICENSE file in root directory for full license.
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*/
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"use strict"
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const {
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CALL,
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CONSTRUCT,
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PatternMatcher,
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ReferenceTracker,
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getStringIfConstant,
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} = require("eslint-utils")
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module.exports = {
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/**
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* Define generator to search pattern.
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* The iterator generated by the generator returns the start and end index of the match.
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* @param {RegExp} pattern Base pattern
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* @returns {function(string):IterableIterator<RegExpExecArray>} generator
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*/
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definePatternSearchGenerator(pattern) {
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const matcher = new PatternMatcher(pattern)
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return matcher.execAll.bind(matcher)
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},
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/**
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* Check whether a given token is a comma token or not.
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* @param {Token} token The token to check.
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* @returns {boolean} `true` if the token is a comma token.
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*/
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isCommaToken(token) {
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return (
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token != null && token.type === "Punctuator" && token.value === ","
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)
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},
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/**
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* Iterate the calls of the `RegExp` global variable.
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* @param {Scope} globalScope The global scope object.
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* @returns {IterableIterator<{node:Node,pattern:(string|null),flags:(string|null)}>} The iterator of `CallExpression` or `NewExpression` for `RegExp`.
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*/
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*getRegExpCalls(globalScope) {
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const tracker = new ReferenceTracker(globalScope)
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for (const { node } of tracker.iterateGlobalReferences({
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RegExp: { [CALL]: true, [CONSTRUCT]: true },
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})) {
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const [patternNode, flagsNode] = node.arguments
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yield {
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node,
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pattern: getStringIfConstant(patternNode, globalScope),
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flags: getStringIfConstant(flagsNode, globalScope),
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}
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}
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},
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}
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