From 7d042521260b285770e77ff2e5914ca5b8c43685 Mon Sep 17 00:00:00 2001
From: Beau McCartney <63375392+BeauSLM@users.noreply.github.com>
Date: Sun, 25 Dec 2022 13:37:23 -0700
Subject: [PATCH] mach: remove compiler error for missing field in app
 (upstream issue fixed) (#647)

* platform: allow fieldless App
* platform: remove unused field

Co-authored-by: Beau McCartney <beau@beaumccartney.xyz>
---
 src/platform/common.zig  | 13 ++-----------
 src/platform/libmach.zig |  3 ---
 2 files changed, 2 insertions(+), 14 deletions(-)

diff --git a/src/platform/common.zig b/src/platform/common.zig
index 2dfadedf..62ed49ac 100644
--- a/src/platform/common.zig
+++ b/src/platform/common.zig
@@ -6,17 +6,8 @@ pub fn checkApplication(comptime app_pkg: type) void {
     }
     const App = app_pkg.App;
 
-    // If App has no fields, it gets interpretted as '*const App' when it should be '*App'
-    // This gives a more useful compiler error.
-    switch (@typeInfo(App)) {
-        .Struct => |app| {
-            if (app.fields.len == 0) {
-                @compileError("App must contain fields. Example: '_unused: i32,'");
-            }
-        },
-        else => {
-            @compileError("App must be a struct type. Found:" ++ @typeName(App));
-        },
+    if (@typeInfo(App) != .Struct) {
+        @compileError("App must be a struct type. Found:" ++ @typeName(App));
     }
 
     if (@hasDecl(App, "init")) {
diff --git a/src/platform/libmach.zig b/src/platform/libmach.zig
index a128f1ea..478b96c6 100644
--- a/src/platform/libmach.zig
+++ b/src/platform/libmach.zig
@@ -7,9 +7,6 @@ const native = @import("native.zig");
 
 pub const App = @This();
 
-// TODO(self-hosted): https://github.com/ziglang/zig/issues/12275
-_unused: i32,
-
 pub const GPUInterface = gpu.dawn.Interface;
 
 const _ = gpu.Export(GPUInterface);