| /** |
| * @fileoverview Rule to enforce the use of `u` flag on RegExp. |
| * @author Toru Nagashima |
| */ |
| |
| "use strict"; |
| |
| //------------------------------------------------------------------------------ |
| // Requirements |
| //------------------------------------------------------------------------------ |
| |
| const { |
| CALL, |
| CONSTRUCT, |
| ReferenceTracker, |
| getStringIfConstant |
| } = require("eslint-utils"); |
| |
| //------------------------------------------------------------------------------ |
| // Rule Definition |
| //------------------------------------------------------------------------------ |
| |
| module.exports = { |
| meta: { |
| type: "suggestion", |
| |
| docs: { |
| description: "enforce the use of `u` flag on RegExp", |
| category: "Best Practices", |
| recommended: false, |
| url: "https://eslint.org/docs/rules/require-unicode-regexp" |
| }, |
| |
| messages: { |
| requireUFlag: "Use the 'u' flag." |
| }, |
| |
| schema: [] |
| }, |
| |
| create(context) { |
| return { |
| "Literal[regex]"(node) { |
| const flags = node.regex.flags || ""; |
| |
| if (!flags.includes("u")) { |
| context.report({ node, messageId: "requireUFlag" }); |
| } |
| }, |
| |
| Program() { |
| const scope = context.getScope(); |
| const tracker = new ReferenceTracker(scope); |
| const trackMap = { |
| RegExp: { [CALL]: true, [CONSTRUCT]: true } |
| }; |
| |
| for (const { node } of tracker.iterateGlobalReferences(trackMap)) { |
| const flagsNode = node.arguments[1]; |
| const flags = getStringIfConstant(flagsNode, scope); |
| |
| if (!flagsNode || (typeof flags === "string" && !flags.includes("u"))) { |
| context.report({ node, messageId: "requireUFlag" }); |
| } |
| } |
| } |
| }; |
| } |
| }; |