1 files changed, 87 insertions, 0 deletions
diff --git a/node_modules/tslint/lib/rules/noDuplicateVariableRule.js b/node_modules/tslint/lib/rules/noDuplicateVariableRule.js
new file mode 100644
index 000000000..c828bfbff
--- /dev/null
+++ b/node_modules/tslint/lib/rules/noDuplicateVariableRule.js
@@ -0,0 +1,87 @@
+"use strict";
+/**
+ * @license
+ * Copyright 2013 Palantir Technologies, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+Object.defineProperty(exports, "__esModule", { value: true });
+var tslib_1 = require("tslib");
+var utils = require("tsutils");
+var ts = require("typescript");
+var Lint = require("../index");
+var Rule = (function (_super) {
+    tslib_1.__extends(Rule, _super);
+    function Rule() {
+        return _super !== null && _super.apply(this, arguments) || this;
+    }
+    /* tslint:enable:object-literal-sort-keys */
+    Rule.FAILURE_STRING = function (name) {
+        return "Duplicate variable: '" + name + "'";
+    };
+    Rule.prototype.apply = function (sourceFile) {
+        return this.applyWithFunction(sourceFile, walk);
+    };
+    return Rule;
+}(Lint.Rules.AbstractRule));
+/* tslint:disable:object-literal-sort-keys */
+Rule.metadata = {
+    ruleName: "no-duplicate-variable",
+    description: "Disallows duplicate variable declarations in the same block scope.",
+    descriptionDetails: (_a = ["\n            This rule is only useful when using the `var` keyword -\n            the compiler will detect redeclarations of `let` and `const` variables."], _a.raw = ["\n            This rule is only useful when using the \\`var\\` keyword -\n            the compiler will detect redeclarations of \\`let\\` and \\`const\\` variables."], Lint.Utils.dedent(_a)),
+    rationale: (_b = ["\n            A variable can be reassigned if necessary -\n            there's no good reason to have a duplicate variable declaration."], _b.raw = ["\n            A variable can be reassigned if necessary -\n            there's no good reason to have a duplicate variable declaration."], Lint.Utils.dedent(_b)),
+    optionsDescription: "Not configurable.",
+    options: null,
+    optionExamples: [true],
+    type: "functionality",
+    typescriptOnly: false,
+};
+exports.Rule = Rule;
+function walk(ctx) {
+    var scope = new Set();
+    return ts.forEachChild(ctx.sourceFile, function cb(node) {
+        if (utils.isFunctionScopeBoundary(node)) {
+            var oldScope = scope;
+            scope = new Set();
+            ts.forEachChild(node, cb);
+            scope = oldScope;
+            return;
+        }
+        else if (utils.isVariableDeclaration(node) && !utils.isBlockScopedVariableDeclaration(node)) {
+            forEachBoundIdentifier(node.name, function (id) {
+                var text = id.text;
+                if (scope.has(text)) {
+                    ctx.addFailureAtNode(id, Rule.FAILURE_STRING(text));
+                }
+                else {
+                    scope.add(text);
+                }
+            });
+        }
+        return ts.forEachChild(node, cb);
+    });
+}
+function forEachBoundIdentifier(name, action) {
+    if (name.kind === ts.SyntaxKind.Identifier) {
+        action(name);
+    }
+    else {
+        for (var _i = 0, _a = name.elements; _i < _a.length; _i++) {
+            var e = _a[_i];
+            if (e.kind !== ts.SyntaxKind.OmittedExpression) {
+                forEachBoundIdentifier(e.name, action);
+            }
+        }
+    }
+}
+var _a, _b;