Use @hasDecl and automatically assign the window function pointers.

src/gui/gui.zig

@@ -38,10 +38,14 @@ pub fn init(_allocator: Allocator) !void {
 	inline for(@typeInfo(windowlist).Struct.decls) |decl| {
 		const windowStruct = @field(windowlist, decl.name);
 		try addWindow(&windowStruct.window);
-		inline for(@typeInfo(windowStruct).Struct.decls) |_decl| {
+		if(@hasDecl(windowStruct, "init")) {
-			if(comptime std.mem.eql(u8, _decl.name, "init")) {
 			try windowStruct.init();
 		}
+		const functionNames = [_][]const u8{"render", "update", "updateSelected", "updateHovered", "onOpen", "onClose"};
+		inline for(functionNames) |function| {
+			if(@hasDecl(windowStruct, function)) {
+				@field(windowStruct.window, function ++ "Fn") = &@field(windowStruct, function);
+			}
 		}
 	}
 	try GuiWindow.__init();

src/gui/gui_component.zig

@@ -32,15 +32,12 @@ pub const GuiComponent = union(enum) {
 	pub fn deinit(self: GuiComponent) void {
 		switch(self) {
 			inline else => |impl| {
-				// Only call the function if it exists:
+				if(@hasDecl(@TypeOf(impl.*), "deinit")) {
-				inline for(@typeInfo(@TypeOf(impl.*)).Struct.decls) |decl| {
-					if(comptime std.mem.eql(u8, decl.name, "deinit")) {
 					impl.deinit();
 				}
 			}
 		}
 	}
-	}
 
 	pub fn mutPos(self: GuiComponent) *Vec2f {
 		switch(self) {
@@ -77,67 +74,52 @@ pub const GuiComponent = union(enum) {
 	pub fn updateSelected(self: GuiComponent) void {
 		switch(self) {
 			inline else => |impl| {
-				// Only call the function if it exists:
+				if(@hasDecl(@TypeOf(impl.*), "updateSelected")) {
-				inline for(@typeInfo(@TypeOf(impl.*)).Struct.decls) |decl| {
-					if(comptime std.mem.eql(u8, decl.name, "updateSelected")) {
 					impl.updateSelected();
 				}
 			}
 		}
 	}
-	}
 
 	pub fn updateHovered(self: GuiComponent, mousePosition: Vec2f) void {
 		switch(self) {
 			inline else => |impl| {
-				// Only call the function if it exists:
+				if(@hasDecl(@TypeOf(impl.*), "updateHovered")) {
-				inline for(@typeInfo(@TypeOf(impl.*)).Struct.decls) |decl| {
-					if(comptime std.mem.eql(u8, decl.name, "updateHovered")) {
 					impl.updateHovered(mousePosition);
 				}
 			}
 		}
 	}
-	}
 
 	pub fn render(self: GuiComponent, mousePosition: Vec2f) !void {
 		switch(self) {
 			inline else => |impl| {
-				// Only call the function if it exists:
+				if(@hasDecl(@TypeOf(impl.*), "render")) {
-				inline for(@typeInfo(@TypeOf(impl.*)).Struct.decls) |decl| {
-					if(comptime std.mem.eql(u8, decl.name, "render")) {
 					try impl.render(mousePosition);
 				}
 			}
 		}
 	}
-	}
 
 	pub fn mainButtonPressed(self: GuiComponent, mousePosition: Vec2f) void {
 		switch(self) {
 			inline else => |impl| {
-				// Only call the function if it exists:
+				if(@hasDecl(@TypeOf(impl.*), "mainButtonPressed")) {
-				inline for(@typeInfo(@TypeOf(impl.*)).Struct.decls) |decl| {
-					if(comptime std.mem.eql(u8, decl.name, "mainButtonPressed")) {
 					impl.mainButtonPressed(mousePosition);
 				}
 			}
 		}
 	}
-	}
 
 	pub fn mainButtonReleased(self: GuiComponent, mousePosition: Vec2f) void {
 		switch(self) {
 			inline else => |impl| {
-				// Only call the function if it exists:
+				if(@hasDecl(@TypeOf(impl.*), "mainButtonReleased")) {
-				inline for(@typeInfo(@TypeOf(impl.*)).Struct.decls) |decl| {
-					if(comptime std.mem.eql(u8, decl.name, "mainButtonReleased")) {
 					impl.mainButtonReleased(mousePosition);
 				}
 			}
 		}
 	}
-	}
 
 	pub fn contains(_pos: Vec2f, _size: Vec2f, point: Vec2f) bool {
 		return @reduce(.And, point >= _pos) and @reduce(.And, point < _pos + _size);

src/gui/windows/change_name.zig

@@ -18,8 +18,6 @@ pub var window = GuiWindow {
 	.contentSize = Vec2f{128, 256},
 	.id = "cubyz:change_name",
 	.title = "Change Name",
-	.onOpenFn = &onOpen,
-	.onCloseFn = &onClose,
 	.components = &components,
 };
 var textComponent: *TextInput = undefined;

src/gui/windows/chat.zig

@@ -18,10 +18,6 @@ pub var window: GuiWindow = GuiWindow {
 	.contentSize = Vec2f{128, 256},
 	.id = "cubyz:chat",
 	.title = "Chat",
-	.onOpenFn = &onOpen,
-	.onCloseFn = &onClose,
-	.updateFn = &update,
-	.renderFn = &render,
 	.components = &components,
 	.showTitleBar = false,
 	.hasBackground = false,

src/gui/windows/controls.zig

@@ -17,9 +17,6 @@ pub var window = GuiWindow {
 	.contentSize = Vec2f{128, 256},
 	.id = "cubyz:controls",
 	.title = "Controls",
-	.onOpenFn = &onOpen,
-	.onCloseFn = &onClose,
-	.renderFn = &render,
 	.components = &components,
 };
 

src/gui/windows/crosshair.zig

@@ -16,7 +16,6 @@ pub var window = GuiWindow {
 	.contentSize = Vec2f{size, size},
 	.title = "Crosshair",
 	.id = "cubyz:crosshair",
-	.renderFn = &render,
 	.showTitleBar = false,
 	.hasBackground = false,
 	.isHud = true,

src/gui/windows/graphics.zig

@@ -18,8 +18,6 @@ pub var window = GuiWindow {
 	.contentSize = Vec2f{128, 256},
 	.id = "cubyz:graphics",
 	.title = "Graphics",
-	.onOpenFn = &onOpen,
-	.onCloseFn = &onClose,
 	.components = &components,
 };
 

src/gui/windows/healthbar.zig

@@ -15,7 +15,6 @@ pub var window = GuiWindow {
 	.contentSize = Vec2f{128, 16},
 	.title = "Health Bar",
 	.id = "cubyz:healthbar",
-	.renderFn = &render,
 	.isHud = true,
 	.showTitleBar = false,
 	.hasBackground = false,

src/gui/windows/hotbar.zig

@@ -16,9 +16,6 @@ pub var window = GuiWindow {
 	.contentSize = Vec2f{64*8, 64},
 	.title = "Hotbar",
 	.id = "cubyz:hotbar",
-	.onOpenFn = &onOpen,
-	.onCloseFn = &onClose,
-	.renderFn = &render,
 	.components = &components,
 	.isHud = true,
 	.showTitleBar = false,

src/gui/windows/main.zig

@@ -14,8 +14,6 @@ var components: [1]GuiComponent = undefined;
 pub var window = GuiWindow {
 	.contentSize = Vec2f{128, 256},
 	.id = "cubyz:main",
-	.onOpenFn = &onOpen,
-	.onCloseFn = &onClose,
 	.components = &components,
 };
 

src/gui/windows/multiplayer.zig

@@ -19,9 +19,6 @@ pub var window = GuiWindow {
 	.contentSize = Vec2f{128, 256},
 	.id = "cubyz:multiplayer",
 	.title = "Multiplayer",
-	.onOpenFn = &onOpen,
-	.onCloseFn = &onClose,
-	.updateFn = &update,
 	.components = &components,
 };
 

src/gui/windows/settings.zig

@@ -15,8 +15,6 @@ pub var window: GuiWindow = GuiWindow {
 	.contentSize = Vec2f{128, 256},
 	.id = "cubyz:settings",
 	.title = "Settings",
-	.onOpenFn = &onOpen,
-	.onCloseFn = &onClose,
 	.components = &components,
 };
 

src/gui/windows/sound.zig

@@ -15,8 +15,6 @@ pub var window = GuiWindow {
 	.contentSize = Vec2f{128, 256},
 	.id = "cubyz:sound",
 	.title = "Sound TODO",
-	.onOpenFn = &onOpen,
-	.onCloseFn = &onClose,
 	.components = &components,
 };