From ad82918f56b215a428ebe7c533ee825e1152d1b4 Mon Sep 17 00:00:00 2001
From: Dj <43033058+DjDeveloperr@users.noreply.github.com>
Date: Sat, 7 Jan 2023 19:58:10 -0800
Subject: feat(ext/ffi): structs by value (#15060)

Adds support for passing and returning structs as buffers to FFI. This does not implement fastapi support for structs. Needed for certain system APIs such as AppKit on macOS.
---
 cli/tsc/dts/lib.deno.unstable.d.ts | 24 +++++++++++++++++++-----
 1 file changed, 19 insertions(+), 5 deletions(-)

(limited to 'cli/tsc/dts/lib.deno.unstable.d.ts')

diff --git a/cli/tsc/dts/lib.deno.unstable.d.ts b/cli/tsc/dts/lib.deno.unstable.d.ts
index d34a5bd62..e3ae8f46f 100644
--- a/cli/tsc/dts/lib.deno.unstable.d.ts
+++ b/cli/tsc/dts/lib.deno.unstable.d.ts
@@ -94,6 +94,13 @@ declare namespace Deno {
    */
   type NativeVoidType = "void";
 
+  /** **UNSTABLE**: New API, yet to be vetted.
+   * 
+   * The native struct type for interfacing with foreign functions.
+   * 
+   */
+  type NativeStructType = { readonly struct: readonly NativeType[] };
+
   /** **UNSTABLE**: New API, yet to be vetted.
    *
    * All supported types for interfacing with foreign functions.
@@ -106,7 +113,8 @@ declare namespace Deno {
     | NativeBooleanType
     | NativePointerType
     | NativeBufferType
-    | NativeFunctionType;
+    | NativeFunctionType
+    | NativeStructType;
 
   /** **UNSTABLE**: New API, yet to be vetted.
    *
@@ -136,7 +144,9 @@ declare namespace Deno {
    *
    * @category FFI
    */
-  type ToNativeType<T extends NativeType = NativeType> = ToNativeTypeMap[T];
+  type ToNativeType<T extends NativeType = NativeType> = T extends
+    NativeStructType ? BufferSource
+    : ToNativeTypeMap[Exclude<T, NativeStructType>];
 
   /** **UNSTABLE**: New API, yet to be vetted.
    *
@@ -153,7 +163,8 @@ declare namespace Deno {
    * @category FFI
    */
   type ToNativeResultType<T extends NativeResultType = NativeResultType> =
-    ToNativeResultTypeMap[T];
+    T extends NativeStructType ? BufferSource
+    : ToNativeResultTypeMap[Exclude<T, NativeStructType>];
 
   /** **UNSTABLE**: New API, yet to be vetted.
    *
@@ -193,7 +204,9 @@ declare namespace Deno {
    *
    * @category FFI
    */
-  type FromNativeType<T extends NativeType = NativeType> = FromNativeTypeMap[T];
+  type FromNativeType<T extends NativeType = NativeType> = T extends
+    NativeStructType ? Uint8Array
+    : FromNativeTypeMap[Exclude<T, NativeStructType>];
 
   /** **UNSTABLE**: New API, yet to be vetted.
    *
@@ -212,7 +225,8 @@ declare namespace Deno {
    * @category FFI
    */
   type FromNativeResultType<T extends NativeResultType = NativeResultType> =
-    FromNativeResultTypeMap[T];
+    T extends NativeStructType ? Uint8Array
+    : FromNativeResultTypeMap[Exclude<T, NativeStructType>];
 
   /** **UNSTABLE**: New API, yet to be vetted.
    *
-- 
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