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app_vue/node_modules/eslint/lib/rules/no-control-regex.js

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+/**
+ * @fileoverview Rule to forbid control characters from regular expressions.
+ * @author Nicholas C. Zakas
+ */
+
+"use strict";
+
+const RegExpValidator = require("regexpp").RegExpValidator;
+const collector = new (class {
+    constructor() {
+        this._source = "";
+        this._controlChars = [];
+        this._validator = new RegExpValidator(this);
+    }
+
+    onPatternEnter() {
+        this._controlChars = [];
+    }
+
+    onCharacter(start, end, cp) {
+        if (cp >= 0x00 &&
+            cp <= 0x1F &&
+            (
+                this._source.codePointAt(start) === cp ||
+                this._source.slice(start, end).startsWith("\\x") ||
+                this._source.slice(start, end).startsWith("\\u")
+            )
+        ) {
+            this._controlChars.push(`\\x${`0${cp.toString(16)}`.slice(-2)}`);
+        }
+    }
+
+    collectControlChars(regexpStr) {
+        try {
+            this._source = regexpStr;
+            this._validator.validatePattern(regexpStr); // Call onCharacter hook
+        } catch {
+
+            // Ignore syntax errors in RegExp.
+        }
+        return this._controlChars;
+    }
+})();
+
+//------------------------------------------------------------------------------
+// Rule Definition
+//------------------------------------------------------------------------------
+
+module.exports = {
+    meta: {
+        type: "problem",
+
+        docs: {
+            description: "disallow control characters in regular expressions",
+            category: "Possible Errors",
+            recommended: true,
+            url: "https://eslint.org/docs/rules/no-control-regex"
+        },
+
+        schema: [],
+
+        messages: {
+            unexpected: "Unexpected control character(s) in regular expression: {{controlChars}}."
+        }
+    },
+
+    create(context) {
+
+        /**
+         * Get the regex expression
+         * @param {ASTNode} node node to evaluate
+         * @returns {RegExp|null} Regex if found else null
+         * @private
+         */
+        function getRegExpPattern(node) {
+            if (node.regex) {
+                return node.regex.pattern;
+            }
+            if (typeof node.value === "string" &&
+                (node.parent.type === "NewExpression" || node.parent.type === "CallExpression") &&
+                node.parent.callee.type === "Identifier" &&
+                node.parent.callee.name === "RegExp" &&
+                node.parent.arguments[0] === node
+            ) {
+                return node.value;
+            }
+
+            return null;
+        }
+
+        return {
+            Literal(node) {
+                const pattern = getRegExpPattern(node);
+
+                if (pattern) {
+                    const controlCharacters = collector.collectControlChars(pattern);
+
+                    if (controlCharacters.length > 0) {
+                        context.report({
+                            node,
+                            messageId: "unexpected",
+                            data: {
+                                controlChars: controlCharacters.join(", ")
+                            }
+                        });
+                    }
+                }
+            }
+        };
+
+    }
+};