From 872fdee4a51a15be999ae42df1f2891dc23f641b Mon Sep 17 00:00:00 2001
From: Mohsen Azimi <mazimi@lyft.com>
Date: Mon, 1 May 2017 12:55:40 -0700
Subject: [PATCH 1/3] Add createTypeAliasDeclaration and
 updateTypeAliasDeclaration factories

---
 src/compiler/factory.ts | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/src/compiler/factory.ts b/src/compiler/factory.ts
index 95878917b3d..72f8e255cb4 100644
--- a/src/compiler/factory.ts
+++ b/src/compiler/factory.ts
@@ -1462,6 +1462,22 @@ namespace ts {
             : node;
     }
 
+    export function createTypeAliasDeclaration(name: string | Identifier, typeParameters: TypeParameterDeclaration[] | undefined, type: ts.TypeNode) {
+        const node = <TypeAliasDeclaration>createSynthesizedNode(SyntaxKind.TypeAliasDeclaration);
+        node.name = asName(name);
+        node.typeParameters = asNodeArray(typeParameters);
+        node.type = type;
+        return node;
+    }
+
+    export function updateTypeAliasDeclaration(node: TypeAliasDeclaration, name: string | Identifier, typeParameters: TypeParameterDeclaration[] | undefined, type: ts.TypeNode) {
+        return node.name !== name
+            || node.typeParameters !== typeParameters
+            || node.type !== type
+            ? updateNode(createTypeAliasDeclaration(name, typeParameters, type), node)
+            : node;
+    }
+
     export function createEnumDeclaration(decorators: Decorator[] | undefined, modifiers: Modifier[] | undefined, name: string | Identifier, members: EnumMember[]) {
         const node = <EnumDeclaration>createSynthesizedNode(SyntaxKind.EnumDeclaration);
         node.decorators = asNodeArray(decorators);

From f9c46b5f820d098ab64054055579ca7819259ce0 Mon Sep 17 00:00:00 2001
From: Mohsen Azimi <mazimi@lyft.com>
Date: Mon, 1 May 2017 14:00:16 -0700
Subject: [PATCH 2/3] Fix issues raised in PR review

---
 src/compiler/factory.ts | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/compiler/factory.ts b/src/compiler/factory.ts
index 72f8e255cb4..011cedcad81 100644
--- a/src/compiler/factory.ts
+++ b/src/compiler/factory.ts
@@ -1462,7 +1462,7 @@ namespace ts {
             : node;
     }
 
-    export function createTypeAliasDeclaration(name: string | Identifier, typeParameters: TypeParameterDeclaration[] | undefined, type: ts.TypeNode) {
+    export function createTypeAliasDeclaration(name: Identifier, typeParameters: TypeParameterDeclaration[] | undefined, type: TypeNode) {
         const node = <TypeAliasDeclaration>createSynthesizedNode(SyntaxKind.TypeAliasDeclaration);
         node.name = asName(name);
         node.typeParameters = asNodeArray(typeParameters);
@@ -1470,7 +1470,7 @@ namespace ts {
         return node;
     }
 
-    export function updateTypeAliasDeclaration(node: TypeAliasDeclaration, name: string | Identifier, typeParameters: TypeParameterDeclaration[] | undefined, type: ts.TypeNode) {
+    export function updateTypeAliasDeclaration(node: TypeAliasDeclaration, name: Identifier, typeParameters: TypeParameterDeclaration[] | undefined, type: TypeNode) {
         return node.name !== name
             || node.typeParameters !== typeParameters
             || node.type !== type

From b27aec2247f5c104b52fec588f0274f4d47e5230 Mon Sep 17 00:00:00 2001
From: Mohsen Azimi <mazimi@lyft.com>
Date: Mon, 1 May 2017 14:58:36 -0700
Subject: [PATCH 3/3] Allow string for name when creating a
 TypeAliasDeclaration

---
 src/compiler/factory.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/compiler/factory.ts b/src/compiler/factory.ts
index 011cedcad81..cce95c23c22 100644
--- a/src/compiler/factory.ts
+++ b/src/compiler/factory.ts
@@ -1462,7 +1462,7 @@ namespace ts {
             : node;
     }
 
-    export function createTypeAliasDeclaration(name: Identifier, typeParameters: TypeParameterDeclaration[] | undefined, type: TypeNode) {
+    export function createTypeAliasDeclaration(name: string | Identifier, typeParameters: TypeParameterDeclaration[] | undefined, type: TypeNode) {
         const node = <TypeAliasDeclaration>createSynthesizedNode(SyntaxKind.TypeAliasDeclaration);
         node.name = asName(name);
         node.typeParameters = asNodeArray(typeParameters);