From 04187bde8de24f1913099ce04cf22dbb8d20e59c Mon Sep 17 00:00:00 2001
From: Andy <anhans@microsoft.com>
Date: Fri, 8 Jun 2018 15:56:56 -0700
Subject: [PATCH] fixStrictClassInitialization: Support array initializer
 (#24810)

---
 src/compiler/types.ts                                         | 2 +-
 src/services/codefixes/fixStrictClassInitialization.ts        | 3 +++
 .../fourslash/codeFixClassPropertyInitialization_all_3.ts     | 4 ++++
 3 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/src/compiler/types.ts b/src/compiler/types.ts
index 726947111be..32c6faea37c 100644
--- a/src/compiler/types.ts
+++ b/src/compiler/types.ts
@@ -3056,12 +3056,12 @@ namespace ts {
         /* @internal */ getSymbolCount(): number;
         /* @internal */ getTypeCount(): number;
 
+        /* @internal */ isArrayLikeType(type: Type): boolean;
         /**
          * For a union, will include a property if it's defined in *any* of the member types.
          * So for `{ a } | { b }`, this will include both `a` and `b`.
          * Does not include properties of primitive types.
          */
-        /* @internal */ isArrayLikeType(type: Type): boolean;
         /* @internal */ getAllPossiblePropertiesOfTypes(type: ReadonlyArray<Type>): Symbol[];
         /* @internal */ resolveName(name: string, location: Node, meaning: SymbolFlags, excludeGlobals: boolean): Symbol | undefined;
         /* @internal */ getJsxNamespace(location?: Node): string;
diff --git a/src/services/codefixes/fixStrictClassInitialization.ts b/src/services/codefixes/fixStrictClassInitialization.ts
index 278d1e2d3f6..f52ebadc851 100644
--- a/src/services/codefixes/fixStrictClassInitialization.ts
+++ b/src/services/codefixes/fixStrictClassInitialization.ts
@@ -127,6 +127,9 @@ namespace ts.codefix {
 
             return createNew(createIdentifier(type.symbol.name), /*typeArguments*/ undefined, /*argumentsArray*/ undefined);
         }
+        else if (checker.isArrayLikeType(type)) {
+            return createArrayLiteral();
+        }
         return undefined;
     }
 }
diff --git a/tests/cases/fourslash/codeFixClassPropertyInitialization_all_3.ts b/tests/cases/fourslash/codeFixClassPropertyInitialization_all_3.ts
index 29a9fe19b15..08584a01f91 100644
--- a/tests/cases/fourslash/codeFixClassPropertyInitialization_all_3.ts
+++ b/tests/cases/fourslash/codeFixClassPropertyInitialization_all_3.ts
@@ -35,6 +35,8 @@
 ////     k: AT;
 ////
 ////     l: Foo;
+////
+////     m: number[];
 //// }
 
 verify.codeFixAll({
@@ -73,5 +75,7 @@ class T {
     k: AT = new AT;
 
     l: Foo = new Foo;
+
+    m: number[] = [];
 }`
 });
\ No newline at end of file