checker: require unsafe for Struct(voidptr) casts

examples/term.ui/cursor_chaser.v

@@ -25,9 +25,7 @@ mut:
 	cut_rate  f64 = 5
 }
 
-fn frame(x voidptr) {
-	mut app := &App(x)
-
+fn frame(mut app App) {
 	app.tui.clear()
 
 	if app.points.len > 0 {
@@ -55,9 +53,7 @@ fn frame(x voidptr) {
 	app.tui.flush()
 }
 
-fn event(e &tui.Event, x voidptr) {
-	mut app := &App(x)
-
+fn event(e &tui.Event, mut app App) {
 	match e.typ {
 		.key_down {
 			match e.code {

examples/term.ui/event_viewer.v

@@ -5,8 +5,7 @@ mut:
 	tui &tui.Context = unsafe { nil }
 }
 
-fn event(e &tui.Event, x voidptr) {
-	mut app := &App(x)
+fn event(e &tui.Event, mut app App) {
 	app.tui.clear()
 	app.tui.set_cursor_position(0, 0)
 	app.tui.write('V term.input event viewer (press `esc` to exit)\n\n')

examples/term.ui/pong.v

@@ -458,18 +458,15 @@ fn (mut g Game) free() {
 }
 
 // TODO Remove these wrapper functions when we can assign methods as callbacks
-fn init(x voidptr) {
-	mut app := &App(x)
+fn init(mut app App) {
 	app.init()
 }
 
-fn frame(x voidptr) {
-	mut app := &App(x)
+fn frame(mut app App) {
 	app.frame()
 }
 
-fn cleanup(x voidptr) {
-	mut app := &App(x)
+fn cleanup(mut app App) {
 	unsafe {
 		app.free()
 	}
@@ -479,8 +476,7 @@ fn fail(error string) {
 	eprintln(error)
 }
 
-fn event(e &ui.Event, x voidptr) {
-	mut app := &App(x)
+fn event(e &ui.Event, mut app App) {
 	app.event(e)
 }
 

examples/term.ui/rectangles.v

@@ -27,8 +27,7 @@ fn random_color() tui.Color {
 	}
 }
 
-fn event(e &tui.Event, x voidptr) {
-	mut app := &App(x)
+fn event(e &tui.Event, mut app App) {
 	match e.typ {
 		.mouse_down {
 			app.is_drag = true
@@ -60,8 +59,7 @@ fn event(e &tui.Event, x voidptr) {
 	app.redraw = true
 }
 
-fn frame(x voidptr) {
-	mut app := &App(x)
+fn frame(mut app App) {
 	if !app.redraw {
 		return
 	}

examples/term.ui/term_drawing.v

@@ -128,8 +128,7 @@ fn main() {
 	app.ui.run()?
 }
 
-fn frame(x voidptr) {
-	mut app := &App(x)
+fn frame(mut app App) {
 	mut redraw := app.should_redraw
 	if app.msg != '' && app.ui.frame_count >= app.msg_hide_tick {
 		app.msg = ''
@@ -141,8 +140,7 @@ fn frame(x voidptr) {
 	}
 }
 
-fn event(event &ui.Event, x voidptr) {
-	mut app := &App(x)
+fn event(event &ui.Event, mut app App) {
 	match event.typ {
 		.mouse_down {
 			app.is_dragging = true

examples/term.ui/text_editor.v

@@ -473,9 +473,8 @@ fn (c Cursor) xy() (int, int) {
 }
 
 // App callbacks
-fn init(x voidptr) {
-	mut a := &App(x)
-	a.init_file()
+fn init(mut app App) {
+	app.init_file()
 }
 
 fn (mut a App) init_file() {
@@ -523,8 +522,7 @@ fn (mut a App) magnet_cursor_x() {
 	}
 }
 
-fn frame(x voidptr) {
-	mut a := &App(x)
+fn frame(mut a App) {
 	mut ed := a.ed
 	a.tui.clear()
 	scroll_limit := a.view_height()
@@ -551,8 +549,7 @@ fn frame(x voidptr) {
 	a.tui.flush()
 }
 
-fn event(e &tui.Event, x voidptr) {
-	mut a := &App(x)
+fn event(e &tui.Event, mut a App) {
 	mut buffer := a.ed
 	if e.typ == .key_down {
 		match e.code {

examples/term.ui/vyper.v

@@ -286,8 +286,7 @@ fn (mut a App) new_game() {
 }
 
 // initialize the app and record the width and height of the window
-fn init(x voidptr) {
-	mut app := &App(x)
+fn init(mut app App) {
 	w, h := app.termui.window_width, app.termui.window_height
 	app.width = w
 	app.height = h
@@ -295,8 +294,7 @@ fn init(x voidptr) {
 }
 
 // event handles different events for the app as they occur
-fn event(e &termui.Event, x voidptr) {
-	mut app := &App(x)
+fn event(e &termui.Event, mut app App) {
 	match e.typ {
 		.mouse_down {}
 		.mouse_drag {}
@@ -324,8 +322,7 @@ fn event(e &termui.Event, x voidptr) {
 }
 
 // frame perform actions on every tick
-fn frame(x voidptr) {
-	mut app := &App(x)
+fn frame(mut app App) {
 	app.update()
 	app.draw()
 }