settle module state initialization

Signed-off-by: Stephen Gutekanst <stephen@hexops.com>

examples/core-custom-entrypoint/App.zig

@@ -62,9 +62,10 @@ pub fn init(
     const pipeline = core.device.createRenderPipeline(&pipeline_descriptor);
 
     // Store our render pipeline in our module's state, so we can access it later on.
-    // TODO(object): module-state-init
-    app.title_timer = try mach.time.Timer.start();
-    app.pipeline = pipeline;
+    app.* = .{
+        .title_timer = try mach.time.Timer.start(),
+        .pipeline = pipeline,
+    };
 
     // TODO(object): window-title
     // try updateWindowTitle(core);

examples/core-triangle/App.zig

@@ -21,9 +21,12 @@ pub fn init(
     app: *App,
     app_tick: mach.Call(App, .tick),
     app_deinit: mach.Call(App, .deinit),
+    // app_caller: mach.Caller(App),
 ) !void {
     core.on_tick = app_tick.id;
     core.on_exit = app_deinit.id;
+    // core.on_tick = app_caller.tick;
+    // core.on_exit = app_caller.exit;
 
     // Create our shader module
     const shader_module = core.device.createShaderModuleWGSL("shader.wgsl", @embedFile("shader.wgsl"));
@@ -58,9 +61,10 @@ pub fn init(
     const pipeline = core.device.createRenderPipeline(&pipeline_descriptor);
 
     // Store our render pipeline in our module's state, so we can access it later on.
-    // TODO(object): module-state-init
-    app.title_timer = try mach.time.Timer.start();
-    app.pipeline = pipeline;
+    app.* = .{
+        .title_timer = try mach.time.Timer.start(),
+        .pipeline = pipeline,
+    };
 
     // TODO(object): window-title
     // try updateWindowTitle(core);

src/Core.zig

@@ -57,8 +57,6 @@ windows: mach.Objects(struct {
     fullscreen: bool,
 }),
 
-global: mach.Object(struct {}),
-
 /// Callback system invoked per tick (e.g. per-frame)
 on_tick: ?mach.FunctionID = null,
 
@@ -131,10 +129,8 @@ pub fn init(core: *Core) !void {
     // TODO: remove undefined initialization (disgusting!)
     const platform: Platform = undefined;
     core.* = .{
-        // TODO: this is a good example of why not *all* state fields should be allowed, must copy
-        // the ones mach initialized
+        // Note: since core.windows is initialized for us already, we just copy the pointer.
         .windows = core.windows,
-        .global = core.global,
 
         .allocator = allocator,
         .main_window = main_window,