From 213812ab22ee7773e067db02557d5db6576baf2e Mon Sep 17 00:00:00 2001
From: Nathan Shively-Sanders <nathansa@microsoft.com>
Date: Mon, 24 Apr 2017 15:43:10 -0700
Subject: [PATCH] Contextually type object spread expressions

so `x = { ... { a: "a" } }` will be equivalent to `{ a: "a" }`.
---
 src/compiler/checker.ts | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index 57e9d02ddd8..8471ba7aa1f 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -12728,6 +12728,8 @@ namespace ts {
                 case SyntaxKind.PropertyAssignment:
                 case SyntaxKind.ShorthandPropertyAssignment:
                     return getContextualTypeForObjectLiteralElement(<ObjectLiteralElementLike>parent);
+                case SyntaxKind.SpreadAssignment:
+                    return getApparentTypeOfContextualType(parent.parent as ObjectLiteralExpression);
                 case SyntaxKind.ArrayLiteralExpression:
                     return getContextualTypeForElementExpression(node);
                 case SyntaxKind.ConditionalExpression: