Website Structure

Frontend-Learner/node_modules/eslint-plugin-regexp/dist/rules/no-empty-group.js

@@ -0,0 +1,41 @@
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+const utils_1 = require("../utils");
+exports.default = (0, utils_1.createRule)("no-empty-group", {
+    meta: {
+        docs: {
+            description: "disallow empty group",
+            category: "Possible Errors",
+            recommended: true,
+        },
+        schema: [],
+        messages: {
+            unexpected: "Unexpected empty group.",
+        },
+        type: "suggestion",
+    },
+    create(context) {
+        function verifyGroup({ node, getRegexpLocation }, gNode) {
+            if (gNode.alternatives.every((alt) => alt.elements.length === 0)) {
+                context.report({
+                    node,
+                    loc: getRegexpLocation(gNode),
+                    messageId: "unexpected",
+                });
+            }
+        }
+        function createVisitor(regexpContext) {
+            return {
+                onGroupEnter(gNode) {
+                    verifyGroup(regexpContext, gNode);
+                },
+                onCapturingGroupEnter(cgNode) {
+                    verifyGroup(regexpContext, cgNode);
+                },
+            };
+        }
+        return (0, utils_1.defineRegexpVisitor)(context, {
+            createVisitor,
+        });
+    },
+});