Constnium/node_modules/eslint-plugin-es/lib/rules/no-regexp-lookbehind-assertions.js
2022-06-23 02:27:43 +02:00

74 lines
2.1 KiB
JavaScript

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