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Filename : ast-utils.js

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/**
 * @fileoverview Common utils for AST.
 *
 * This file contains only shared items for core and rules.
 * If you make a utility for rules, please see `../rules/utils/ast-utils.js`.
 *
 * @author Toru Nagashima <https://github.com/mysticatea>
 */
"use strict";

const breakableTypePattern =
	/^(?:(?:Do)?While|For(?:In|Of)?|Switch)Statement$/u;
const lineBreakPattern = /\r\n|[\r\n\u2028\u2029]/u;
const shebangPattern = /^#!([^\r\n]+)/u;

/**
 * Creates a version of the `lineBreakPattern` regex with the global flag.
 * Global regexes are mutable, so this needs to be a function instead of a constant.
 * @returns {RegExp} A global regular expression that matches line terminators
 */
function createGlobalLinebreakMatcher() {
	return new RegExp(lineBreakPattern.source, "gu");
}

module.exports = {
	breakableTypePattern,
	lineBreakPattern,
	createGlobalLinebreakMatcher,
	shebangPattern,
};