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app_vue/node_modules/eslint/lib/rules/no-label-var.js

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+/**
+ * @fileoverview Rule to flag labels that are the same as an identifier
+ * @author Ian Christian Myers
+ */
+
+"use strict";
+
+//------------------------------------------------------------------------------
+// Requirements
+//------------------------------------------------------------------------------
+
+const astUtils = require("./utils/ast-utils");
+
+//------------------------------------------------------------------------------
+// Rule Definition
+//------------------------------------------------------------------------------
+
+module.exports = {
+    meta: {
+        type: "suggestion",
+
+        docs: {
+            description: "disallow labels that share a name with a variable",
+            category: "Variables",
+            recommended: false,
+            url: "https://eslint.org/docs/rules/no-label-var"
+        },
+
+        schema: [],
+
+        messages: {
+            identifierClashWithLabel: "Found identifier with same name as label."
+        }
+    },
+
+    create(context) {
+
+        //--------------------------------------------------------------------------
+        // Helpers
+        //--------------------------------------------------------------------------
+
+        /**
+         * Check if the identifier is present inside current scope
+         * @param {Object} scope current scope
+         * @param {string} name To evaluate
+         * @returns {boolean} True if its present
+         * @private
+         */
+        function findIdentifier(scope, name) {
+            return astUtils.getVariableByName(scope, name) !== null;
+        }
+
+        //--------------------------------------------------------------------------
+        // Public API
+        //--------------------------------------------------------------------------
+
+        return {
+
+            LabeledStatement(node) {
+
+                // Fetch the innermost scope.
+                const scope = context.getScope();
+
+                /*
+                 * Recursively find the identifier walking up the scope, starting
+                 * with the innermost scope.
+                 */
+                if (findIdentifier(scope, node.label.name)) {
+                    context.report({
+                        node,
+                        messageId: "identifierClashWithLabel"
+                    });
+                }
+            }
+
+        };
+
+    }
+};