update socials section

node_modules/eslint/lib/rules/no-empty-character-class.js

@@ -0,0 +1,76 @@
+/**
+ * @fileoverview Rule to flag the use of empty character classes in regular expressions
+ * @author Ian Christian Myers
+ */
+
+"use strict";
+
+//------------------------------------------------------------------------------
+// Requirements
+//------------------------------------------------------------------------------
+
+const { RegExpParser, visitRegExpAST } = require("@eslint-community/regexpp");
+
+//------------------------------------------------------------------------------
+// Helpers
+//------------------------------------------------------------------------------
+
+const parser = new RegExpParser();
+const QUICK_TEST_REGEX = /\[\]/u;
+
+//------------------------------------------------------------------------------
+// Rule Definition
+//------------------------------------------------------------------------------
+
+/** @type {import('../shared/types').Rule} */
+module.exports = {
+    meta: {
+        type: "problem",
+
+        docs: {
+            description: "Disallow empty character classes in regular expressions",
+            recommended: true,
+            url: "https://eslint.org/docs/latest/rules/no-empty-character-class"
+        },
+
+        schema: [],
+
+        messages: {
+            unexpected: "Empty class."
+        }
+    },
+
+    create(context) {
+        return {
+            "Literal[regex]"(node) {
+                const { pattern, flags } = node.regex;
+
+                if (!QUICK_TEST_REGEX.test(pattern)) {
+                    return;
+                }
+
+                let regExpAST;
+
+                try {
+                    regExpAST = parser.parsePattern(pattern, 0, pattern.length, {
+                        unicode: flags.includes("u"),
+                        unicodeSets: flags.includes("v")
+                    });
+                } catch {
+
+                    // Ignore regular expressions that regexpp cannot parse
+                    return;
+                }
+
+                visitRegExpAST(regExpAST, {
+                    onCharacterClassEnter(characterClass) {
+                        if (!characterClass.negate && characterClass.elements.length === 0) {
+                            context.report({ node, messageId: "unexpected" });
+                        }
+                    }
+                });
+            }
+        };
+
+    }
+};