module: basic event handler parameter validation

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

examples/glyphs/Game.zig

@@ -61,10 +61,10 @@ fn init(
 
     // Tell sprite_mod to use the texture
     const texture = text_mod.state.texture;
-    sprite_mod.send(.init_pipeline, .{ Sprite.PipelineOptions{
+    sprite_mod.send(.init_pipeline, .{Sprite.PipelineOptions{
         .pipeline = @intFromEnum(Pipeline.text),
         .texture = texture,
-    } });
+    }});
 
     // We can create entities, and set components on them. Note that components live in a module
     // namespace, e.g. the `Sprite` module could have a 3D `.location` component with a different
@@ -77,7 +77,7 @@ fn init(
     try sprite_mod.set(player, .size, vec2(@floatFromInt(r.width), @floatFromInt(r.height)));
     try sprite_mod.set(player, .uv_transform, Mat3x3.translate(vec2(@floatFromInt(r.x), @floatFromInt(r.y))));
     try sprite_mod.set(player, .pipeline, @intFromEnum(Pipeline.text));
-    sprite_mod.send(.updated, .{ @intFromEnum(Pipeline.text) });
+    sprite_mod.send(.updated, .{@intFromEnum(Pipeline.text)});
 
     game.state = .{
         .timer = try mach.Timer.start(),
@@ -192,14 +192,14 @@ fn tick(
     );
     try sprite_mod.set(game.state.player, .transform, player_transform);
 
-    sprite_mod.send(.updated, .{ @intFromEnum(Pipeline.text) });
+    sprite_mod.send(.updated, .{@intFromEnum(Pipeline.text)});
 
     // Perform pre-render work
-    sprite_mod.send(.pre_render, .{ @intFromEnum(Pipeline.text) });
+    sprite_mod.send(.pre_render, .{@intFromEnum(Pipeline.text)});
 
     // Render a frame
-    engine.send(.begin_pass, .{ gpu.Color{ .r = 1.0, .g = 1.0, .b = 1.0, .a = 1.0 } });
+    engine.send(.begin_pass, .{gpu.Color{ .r = 1.0, .g = 1.0, .b = 1.0, .a = 1.0 }});
-    sprite_mod.send(.render, .{ @intFromEnum(Pipeline.text) });
+    sprite_mod.send(.render, .{@intFromEnum(Pipeline.text)});
     engine.send(.end_pass, .{});
     engine.send(.present, .{}); // Present the frame
 

examples/glyphs/Text.zig

@@ -70,7 +70,7 @@ fn init(
     s.ft = try ft.Library.init();
     s.face = try s.ft.createFaceMemory(assets.roboto_medium_ttf, 0);
 
-    text_mod.send(.prepare, .{ &[_]u21{ '?', '!', 'a', 'b', '#', '@', '%', '$', '&', '^', '*', '+', '=', '<', '>', '/', ':', ';', 'Q', '~' } });
+    text_mod.send(.prepare, .{&[_]u21{ '?', '!', 'a', 'b', '#', '@', '%', '$', '&', '^', '*', '+', '=', '<', '>', '/', ':', ';', 'Q', '~' }});
 }
 
 fn prepare(

examples/sprite/Game.zig

@@ -68,11 +68,11 @@ fn init(
     try sprite_mod.set(player, .uv_transform, Mat3x3.translate(vec2(0, 0)));
     try sprite_mod.set(player, .pipeline, @intFromEnum(Pipeline.default));
 
-    sprite_mod.send(.init_pipeline, .{ Sprite.PipelineOptions{
+    sprite_mod.send(.init_pipeline, .{Sprite.PipelineOptions{
         .pipeline = @intFromEnum(Pipeline.default),
         .texture = try loadTexture(engine),
-    } });
+    }});
-    sprite_mod.send(.updated, .{ @intFromEnum(Pipeline.default) });
+    sprite_mod.send(.updated, .{@intFromEnum(Pipeline.default)});
 
     game.state = .{
         .timer = try mach.Timer.start(),
@@ -176,14 +176,14 @@ fn tick(
     player_pos.v[0] += direction.x() * speed * delta_time;
     player_pos.v[1] += direction.y() * speed * delta_time;
     try sprite_mod.set(game.state.player, .transform, Mat4x4.translate(player_pos));
-    sprite_mod.send(.updated, .{ @intFromEnum(Pipeline.default) });
+    sprite_mod.send(.updated, .{@intFromEnum(Pipeline.default)});
 
     // Perform pre-render work
-    sprite_mod.send(.pre_render, .{ @intFromEnum(Pipeline.default) });
+    sprite_mod.send(.pre_render, .{@intFromEnum(Pipeline.default)});
 
     // Render a frame
-    engine.send(.begin_pass, .{ gpu.Color{ .r = 1.0, .g = 1.0, .b = 1.0, .a = 1.0 } });
+    engine.send(.begin_pass, .{gpu.Color{ .r = 1.0, .g = 1.0, .b = 1.0, .a = 1.0 }});
-    sprite_mod.send(.render, .{ @intFromEnum(Pipeline.default) });
+    sprite_mod.send(.render, .{@intFromEnum(Pipeline.default)});
     engine.send(.end_pass, .{});
     engine.send(.present, .{}); // Present the frame
 

examples/text/Game.zig

@@ -108,9 +108,9 @@ fn init(
     try text_mod.set(player, .text, text1);
     try text_mod.set(player, .style, styles);
 
-    text_mod.send(.init_pipeline, .{ Text.PipelineOptions{
+    text_mod.send(.init_pipeline, .{Text.PipelineOptions{
         .pipeline = @intFromEnum(Pipeline.default),
-    } });
+    }});
     engine.dispatchNoError(); // TODO: no dispatch in user code
 
     game.state = .{
@@ -226,14 +226,14 @@ fn tick(
     player_pos.v[0] += direction.x() * speed * delta_time;
     player_pos.v[1] += direction.y() * speed * delta_time;
     try text_mod.set(game.state.player, .transform, Mat4x4.scaleScalar(upscale).mul(&Mat4x4.translate(player_pos)));
-    text_mod.send(.updated, .{ @intFromEnum(Pipeline.default) });
+    text_mod.send(.updated, .{@intFromEnum(Pipeline.default)});
 
     // Perform pre-render work
-    text_mod.send(.pre_render, .{ @intFromEnum(Pipeline.default) });
+    text_mod.send(.pre_render, .{@intFromEnum(Pipeline.default)});
 
     // Render a frame
-    engine.send(.begin_pass, .{ gpu.Color{ .r = 1.0, .g = 1.0, .b = 1.0, .a = 1.0 } });
+    engine.send(.begin_pass, .{gpu.Color{ .r = 1.0, .g = 1.0, .b = 1.0, .a = 1.0 }});
-    text_mod.send(.render, .{ @intFromEnum(Pipeline.default) });
+    text_mod.send(.render, .{@intFromEnum(Pipeline.default)});
     engine.send(.end_pass, .{});
     engine.send(.present, .{}); // Present the frame
 

src/module.zig

@@ -36,7 +36,6 @@ pub fn Modules(comptime modules2: anytype) type {
         pub const modules = modules2;
 
         // TODO: add runtime module support
-
         pub const ModuleID = u32;
         pub const EventID = u32;
 
@@ -706,6 +705,12 @@ fn validateEvents(comptime error_prefix: anytype, comptime events: anytype) void
             error_prefix ++ ".{s} field .handler expected `.handler = fn` or `.handler = @TypeOf(fn)`, found found: {s}",
             .{ field.name, @typeName(@TypeOf(event.handler)) },
         ));
+
+        switch (@typeInfo(@TypeOf(event.handler))) {
+            .Fn => _ = UninjectedArgsTuple(@TypeOf(event.handler)),
+            .Type => _ = UninjectedArgsTuple(event.handler),
+            else => unreachable,
+        }
     }
 }
 
@@ -1339,7 +1344,7 @@ test "dispatch" {
     // Global events which are not handled by anyone yet can be written as `pub const fooBar = fn() void;`
     // within a module, which allows pre-declaring that `fooBar` is a valid global event, and enables
     // its arguments to be inferred still like this:
-    modules.sendGlobal(.engine_renderer, .frame_done, .{ 1337 });
+    modules.sendGlobal(.engine_renderer, .frame_done, .{1337});
 
     // Local events
     modules.sendToModule(.engine_renderer, .update, .{});