75 lines
2.1 KiB
JavaScript
75 lines
2.1 KiB
JavaScript
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/**
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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 { RegExpValidator } = require("regexpp")
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const { getRegExpCalls } = require("../utils")
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/**
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* Verify a given regular expression.
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* @param {RuleContext} context The rule context to report.
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* @param {Node} node The AST node to report.
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* @param {string} pattern The pattern part of a RegExp.
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* @param {string} flags The flags part of a RegExp.
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* @returns {void}
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*/
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function verify(context, node, pattern, flags) {
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try {
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let found = false
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new RegExpValidator({
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onLookaroundAssertionEnter(_start, kind) {
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if (kind === "lookbehind") {
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found = true
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}
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},
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}).validatePattern(pattern, 0, pattern.length, flags.includes("u"))
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if (found) {
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context.report({ node, messageId: "forbidden" })
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}
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} catch (error) {
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//istanbul ignore else
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if (error.message.startsWith("Invalid regular expression:")) {
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return
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}
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//istanbul ignore next
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throw error
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}
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}
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module.exports = {
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meta: {
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docs: {
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description: "disallow RegExp lookbehind assertions.",
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category: "ES2018",
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recommended: false,
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url:
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"http://mysticatea.github.io/eslint-plugin-es/rules/no-regexp-lookbehind-assertions.html",
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},
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fixable: null,
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messages: {
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forbidden: "ES2018 RegExp lookbehind assertions are forbidden.",
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},
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schema: [],
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type: "problem",
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},
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create(context) {
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return {
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"Literal[regex]"(node) {
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const { pattern, flags } = node.regex
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verify(context, node, pattern || "", flags || "")
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},
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"Program:exit"() {
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const scope = context.getScope()
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for (const { node, pattern, flags } of getRegExpCalls(scope)) {
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verify(context, node, pattern || "", flags || "")
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}
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},
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}
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},
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}
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