1 files changed, 87 insertions, 0 deletions
diff --git a/node_modules/tslint/lib/rules/noVoidExpressionRule.js b/node_modules/tslint/lib/rules/noVoidExpressionRule.js
new file mode 100644
index 000000000..e80ec2cf6
--- /dev/null
+++ b/node_modules/tslint/lib/rules/noVoidExpressionRule.js
@@ -0,0 +1,87 @@
+"use strict";
+/**
+ * @license
+ * Copyright 2016 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 ts = require("typescript");
+var Lint = require("../index");
+var utils_1 = require("../language/utils");
+var OPTION_IGNORE_ARROW_FUNCTION_SHORTHAND = "ignore-arrow-function-shorthand";
+var Rule = (function (_super) {
+    tslib_1.__extends(Rule, _super);
+    function Rule() {
+        return _super !== null && _super.apply(this, arguments) || this;
+    }
+    Rule.prototype.applyWithProgram = function (sourceFile, program) {
+        var ignoreArrowFunctionShorthand = this.ruleArguments.indexOf(OPTION_IGNORE_ARROW_FUNCTION_SHORTHAND) !== -1;
+        return this.applyWithFunction(sourceFile, function (ctx) { return walk(ctx, program.getTypeChecker()); }, { ignoreArrowFunctionShorthand: ignoreArrowFunctionShorthand });
+    };
+    return Rule;
+}(Lint.Rules.TypedRule));
+/* tslint:disable:object-literal-sort-keys */
+Rule.metadata = {
+    ruleName: "no-void-expression",
+    description: "Requires expressions of type `void` to appear in statement position.",
+    optionsDescription: (_a = ["\n            If `", "` is provided, `() => returnsVoid()` will be allowed.\n            Otherwise, it must be written as `() => { returnsVoid(); }`."], _a.raw = ["\n            If \\`", "\\` is provided, \\`() => returnsVoid()\\` will be allowed.\n            Otherwise, it must be written as \\`() => { returnsVoid(); }\\`."], Lint.Utils.dedent(_a, OPTION_IGNORE_ARROW_FUNCTION_SHORTHAND)),
+    options: {
+        type: "array",
+        items: {
+            type: "string",
+            enum: [OPTION_IGNORE_ARROW_FUNCTION_SHORTHAND],
+        },
+        minLength: 0,
+        maxLength: 1,
+    },
+    requiresTypeInfo: true,
+    type: "functionality",
+    typescriptOnly: false,
+};
+/* tslint:enable:object-literal-sort-keys */
+Rule.FAILURE_STRING = "Expression has type `void`. Put it on its own line as a statement.";
+exports.Rule = Rule;
+function walk(ctx, checker) {
+    var sourceFile = ctx.sourceFile, ignoreArrowFunctionShorthand = ctx.options.ignoreArrowFunctionShorthand;
+    return ts.forEachChild(sourceFile, function cb(node) {
+        if (isPossiblyVoidExpression(node)
+            && !isParentAllowedVoid(node)
+            && utils_1.isTypeFlagSet(checker.getTypeAtLocation(node), ts.TypeFlags.Void)) {
+            ctx.addFailureAtNode(node, Rule.FAILURE_STRING);
+        }
+        return ts.forEachChild(node, cb);
+    });
+    function isParentAllowedVoid(node) {
+        switch (node.parent.kind) {
+            case ts.SyntaxKind.ExpressionStatement:
+                return true;
+            case ts.SyntaxKind.ArrowFunction:
+                return ignoreArrowFunctionShorthand;
+            default:
+                return false;
+        }
+    }
+}
+function isPossiblyVoidExpression(node) {
+    switch (node.kind) {
+        case ts.SyntaxKind.AwaitExpression:
+        case ts.SyntaxKind.CallExpression:
+        case ts.SyntaxKind.TaggedTemplateExpression:
+            return true;
+        default:
+            return false;
+    }
+}
+var _a;