From a47a1edcc267fed1d40981c3f27e9707e0eaea9e Mon Sep 17 00:00:00 2001
From: Aaron Turner <aaron@aaronthedev.com>
Date: Fri, 15 May 2020 12:53:49 -0700
Subject: [PATCH 1/3] Changed the Array.flat() definition to work with
 Typescript Compiler

---
 std/assembly/index.d.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/std/assembly/index.d.ts b/std/assembly/index.d.ts
index 7304a2586b..80f0ddd3da 100644
--- a/std/assembly/index.d.ts
+++ b/std/assembly/index.d.ts
@@ -1430,7 +1430,7 @@ declare class Array<T> {
   join(separator?: string): string;
   reverse(): T[];
   /** Flattens an array of arrays. If any null entries exist in the array, they are ignored, unlike JavaScript's version of Array#flat(). */
-  flat(): valueof<T>[];
+  flat(): T[];
   toString(): string;
 }
 

From 11f298403974ac4dd5488cbc82fb1e7ee35513a7 Mon Sep 17 00:00:00 2001
From: Aaron Turner <aaron@aaronthedev.com>
Date: Fri, 15 May 2020 13:12:16 -0700
Subject: [PATCH 2/3] Made requested changes

---
 std/assembly/index.d.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/std/assembly/index.d.ts b/std/assembly/index.d.ts
index 80f0ddd3da..cbd75274cc 100644
--- a/std/assembly/index.d.ts
+++ b/std/assembly/index.d.ts
@@ -1430,7 +1430,7 @@ declare class Array<T> {
   join(separator?: string): string;
   reverse(): T[];
   /** Flattens an array of arrays. If any null entries exist in the array, they are ignored, unlike JavaScript's version of Array#flat(). */
-  flat(): T[];
+  flat<U>(this: Array<Array<U>>): U[];
   toString(): string;
 }
 

From a4d3ea6f485d15958451534a77f3a6ddb629beb4 Mon Sep 17 00:00:00 2001
From: Daniel Wirtz <dcode@dcode.io>
Date: Sat, 16 May 2020 20:07:08 +0200
Subject: [PATCH 3/3] update signature

---
 std/assembly/index.d.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/std/assembly/index.d.ts b/std/assembly/index.d.ts
index cbd75274cc..88d4f1f3f6 100644
--- a/std/assembly/index.d.ts
+++ b/std/assembly/index.d.ts
@@ -1430,7 +1430,7 @@ declare class Array<T> {
   join(separator?: string): string;
   reverse(): T[];
   /** Flattens an array of arrays. If any null entries exist in the array, they are ignored, unlike JavaScript's version of Array#flat(). */
-  flat<U>(this: Array<Array<U>>): U[];
+  flat(): T extends unknown[] ? T : never;
   toString(): string;
 }