feat: no-invalid-regexp support v flag (#17404)

ota-meshi · web-flow · commit 94954a715448 · 2023-07-25T10:11:47.000+02:00
* feat: `no-invalid-regexp` support `v` flag

* fix: uv flags

* feat: update regexpp

* test: add test cases

* fix: error message and update regexpp to ^4.6.1
diff --git a/lib/rules/no-invalid-regexp.js b/lib/rules/no-invalid-regexp.js
@@ -10,7 +10,7 @@
 
 const RegExpValidator = require("@eslint-community/regexpp").RegExpValidator;
 const validator = new RegExpValidator();
-const validFlags = /[dgimsuy]/gu;
+const validFlags = /[dgimsuvy]/gu;
 const undefined1 = void 0;
 
 //------------------------------------------------------------------------------
@@ -108,12 +108,14 @@ module.exports = {
         /**
          * Check syntax error in a given pattern.
          * @param {string} pattern The RegExp pattern to validate.
-         * @param {boolean} uFlag The Unicode flag.
+         * @param {Object} flags The RegExp flags to validate.
+         * @param {boolean} [flags.unicode] The Unicode flag.
+         * @param {boolean} [flags.unicodeSets] The UnicodeSets flag.
          * @returns {string|null} The syntax error.
          */
-        function validateRegExpPattern(pattern, uFlag) {
+        function validateRegExpPattern(pattern, flags) {
             try {
-                validator.validatePattern(pattern, undefined1, undefined1, uFlag);
+                validator.validatePattern(pattern, undefined1, undefined1, flags);
                 return null;
             } catch (err) {
                 return err.message;
@@ -131,10 +133,19 @@ module.exports = {
             }
             try {
                 validator.validateFlags(flags);
-                return null;
             } catch {
                 return `Invalid flags supplied to RegExp constructor '${flags}'`;
             }
+
+            /*
+             * `regexpp` checks the combination of `u` and `v` flags when parsing `Pattern` according to `ecma262`,
+             * but this rule may check only the flag when the pattern is unidentifiable, so check it here.
+             * https://tc39.es/ecma262/multipage/text-processing.html#sec-parsepattern
+             */
+            if (flags.includes("u") && flags.includes("v")) {
+                return "Regex 'u' and 'v' flags cannot be used together";
+            }
+            return null;
         }
 
         return {
@@ -166,8 +177,12 @@ module.exports = {
 
                     // If flags are unknown, report the regex only if its pattern is invalid both with and without the "u" flag
                     flags === null
-                        ? validateRegExpPattern(pattern, true) && validateRegExpPattern(pattern, false)
-                        : validateRegExpPattern(pattern, flags.includes("u"))
+                        ? (
+                            validateRegExpPattern(pattern, { unicode: true, unicodeSets: false }) &&
+                            validateRegExpPattern(pattern, { unicode: false, unicodeSets: true }) &&
+                            validateRegExpPattern(pattern, { unicode: false, unicodeSets: false })
+                        )
+                        : validateRegExpPattern(pattern, { unicode: flags.includes("u"), unicodeSets: flags.includes("v") })
                 );
 
                 if (message) {
diff --git a/package.json b/package.json
@@ -61,7 +61,7 @@
   "bugs": "https://github.com/eslint/eslint/issues/",
   "dependencies": {
     "@eslint-community/eslint-utils": "^4.2.0",
-    "@eslint-community/regexpp": "^4.4.0",
+    "@eslint-community/regexpp": "^4.6.1",
     "@eslint/eslintrc": "^2.1.0",
     "@eslint/js": "8.44.0",
     "@humanwhocodes/config-array": "^0.11.10",
diff --git a/tests/lib/rules/no-invalid-regexp.js b/tests/lib/rules/no-invalid-regexp.js
@@ -81,6 +81,14 @@ ruleTester.run("no-invalid-regexp", rule, {
         "new RegExp('\\\\p{Script=Vith}', 'u')",
         "new RegExp('\\\\p{Script=Vithkuqi}', 'u')",
 
+        // ES2024
+        "new RegExp('[A--B]', 'v')",
+        "new RegExp('[A&&B]', 'v')",
+        "new RegExp('[A--[0-9]]', 'v')",
+        "new RegExp('[\\\\p{Basic_Emoji}--\\\\q{a|bc|def}]', 'v')",
+        "new RegExp('[A--B]', flags)", // valid only with `v` flag
+        "new RegExp('[[]\\\\u{0}*', flags)", // valid only with `u` flag
+
         // allowConstructorFlags
         {
             code: "new RegExp('.', 'g')",
@@ -288,6 +296,48 @@ ruleTester.run("no-invalid-regexp", rule, {
                 data: { message: "Invalid flags supplied to RegExp constructor 'z'" },
                 type: "NewExpression"
             }]
+        },
+
+        // ES2024
+        {
+            code: "new RegExp('[[]', 'v');",
+            errors: [{
+                messageId: "regexMessage",
+                data: { message: "Invalid regular expression: /[[]/v: Unterminated character class" },
+                type: "NewExpression"
+            }]
+        },
+        {
+            code: "new RegExp('.', 'uv');",
+            errors: [{
+                messageId: "regexMessage",
+                data: { message: "Regex 'u' and 'v' flags cannot be used together" },
+                type: "NewExpression"
+            }]
+        },
+        {
+            code: "new RegExp(pattern, 'uv');",
+            errors: [{
+                messageId: "regexMessage",
+                data: { message: "Regex 'u' and 'v' flags cannot be used together" },
+                type: "NewExpression"
+            }]
+        },
+        {
+            code: "new RegExp('[A--B]' /* valid only with `v` flag */, 'u')",
+            errors: [{
+                messageId: "regexMessage",
+                data: { message: "Invalid regular expression: /[A--B]/u: Range out of order in character class" },
+                type: "NewExpression"
+            }]
+        },
+        {
+            code: "new RegExp('[[]\\\\u{0}*' /* valid only with `u` flag */, 'v')",
+            errors: [{
+                messageId: "regexMessage",
+                data: { message: "Invalid regular expression: /[[]\\u{0}*/v: Unterminated character class" },
+                type: "NewExpression"
+            }]
         }
     ]
 });
