.gitignore added

[dotfiles/.git] / .config / coc / extensions / node_modules / coc-prettier / node_modules / eslint / lib / rules / no-shadow-restricted-names.js

diff --git a/.config/coc/extensions/node_modules/coc-prettier/node_modules/eslint/lib/rules/no-shadow-restricted-names.js b/.config/coc/extensions/node_modules/coc-prettier/node_modules/eslint/lib/rules/no-shadow-restricted-names.js
new file mode 100644 (file)
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+++ b/.config/coc/extensions/node_modules/coc-prettier/node_modules/eslint/lib/rules/no-shadow-restricted-names.js
@@ -0,0 +1,64 @@
+/**
+ * @fileoverview Disallow shadowing of NaN, undefined, and Infinity (ES5 section 15.1.1)
+ * @author Michael Ficarra
+ */
+"use strict";
+
+/**
+ * Determines if a variable safely shadows undefined.
+ * This is the case when a variable named `undefined` is never assigned to a value (i.e. it always shares the same value
+ * as the global).
+ * @param {eslintScope.Variable} variable The variable to check
+ * @returns {boolean} true if this variable safely shadows `undefined`
+ */
+function safelyShadowsUndefined(variable) {
+    return variable.name === "undefined" &&
+        variable.references.every(ref => !ref.isWrite()) &&
+        variable.defs.every(def => def.node.type === "VariableDeclarator" && def.node.init === null);
+}
+
+//------------------------------------------------------------------------------
+// Rule Definition
+//------------------------------------------------------------------------------
+
+module.exports = {
+    meta: {
+        type: "suggestion",
+
+        docs: {
+            description: "disallow identifiers from shadowing restricted names",
+            category: "Variables",
+            recommended: true,
+            url: "https://eslint.org/docs/rules/no-shadow-restricted-names"
+        },
+
+        schema: [],
+
+        messages: {
+            shadowingRestrictedName: "Shadowing of global property '{{name}}'."
+        }
+    },
+
+    create(context) {
+
+
+        const RESTRICTED = new Set(["undefined", "NaN", "Infinity", "arguments", "eval"]);
+
+        return {
+            "VariableDeclaration, :function, CatchClause"(node) {
+                for (const variable of context.getDeclaredVariables(node)) {
+                    if (variable.defs.length > 0 && RESTRICTED.has(variable.name) && !safelyShadowsUndefined(variable)) {
+                        context.report({
+                            node: variable.defs[0].name,
+                            messageId: "shadowingRestrictedName",
+                            data: {
+                                name: variable.name
+                            }
+                        });
+                    }
+                }
+            }
+        };
+
+    }
+};