diff --git a/cmd/tools/fast/fast.v b/cmd/tools/fast/fast.v
index 2a5a7cf483..3410de8771 100644
--- a/cmd/tools/fast/fast.v
+++ b/cmd/tools/fast/fast.v
@@ -122,7 +122,7 @@ fn measure(cmd string, description string) int {
 	mut runs := []int{}
 	for r in 0 .. 5 {
 		println('  Sample ${r + 1}/5')
-		sw := time.new_stopwatch({})
+		sw := time.new_stopwatch()
 		exec(cmd)
 		runs << int(sw.elapsed().milliseconds())
 	}
diff --git a/cmd/tools/modules/testing/common.v b/cmd/tools/modules/testing/common.v
index 57ff3e648e..2c4bfb2db1 100644
--- a/cmd/tools/modules/testing/common.v
+++ b/cmd/tools/modules/testing/common.v
@@ -70,7 +70,7 @@ pub fn (mut ts TestSession) append_message(kind MessageKind, msg string) {
 
 pub fn (mut ts TestSession) print_messages() {
 	empty := term.header(' ', ' ')
-	mut print_msg_time := time.new_stopwatch({})
+	mut print_msg_time := time.new_stopwatch()
 	for {
 		// get a message from the channel of messages to be printed:
 		mut rmessage := <-ts.nmessages
diff --git a/cmd/tools/repeat.v b/cmd/tools/repeat.v
index 02c3c71171..6d65d190ec 100644
--- a/cmd/tools/repeat.v
+++ b/cmd/tools/repeat.v
@@ -245,7 +245,7 @@ fn (mut context Context) run() {
 			if context.warmup > 0 && run_warmups < context.commands.len {
 				for i in 1 .. context.warmup + 1 {
 					print('${context.cgoback}warming up run: ${i:4}/${context.warmup:-4} for ${cmd:-50s} took ${duration:6} ms ...')
-					mut sw := time.new_stopwatch({})
+					mut sw := time.new_stopwatch()
 					res := os.execute(cmd)
 					if res.exit_code != 0 {
 						continue
@@ -261,7 +261,7 @@ fn (mut context Context) run() {
 				if context.show_output {
 					print(' | result: ${oldres:s}')
 				}
-				mut sw := time.new_stopwatch({})
+				mut sw := time.new_stopwatch()
 				res := scripting.exec(cmd) or { continue }
 				duration = int(sw.elapsed().milliseconds())
 				if res.exit_code != 0 {
diff --git a/cmd/tools/vtest-all.v b/cmd/tools/vtest-all.v
index dd6a5bfe50..d865872d23 100644
--- a/cmd/tools/vtest-all.v
+++ b/cmd/tools/vtest-all.v
@@ -17,7 +17,7 @@ const vtest_nocleanup = os.getenv('VTEST_NOCLEANUP').bool()
 fn main() {
 	mut commands := get_all_commands()
 	// summary
-	sw := time.new_stopwatch({})
+	sw := time.new_stopwatch()
 	for mut cmd in commands {
 		cmd.run()
 	}
@@ -155,7 +155,7 @@ fn (mut cmd Command) run() {
 	if cmd.label != '' {
 		println(term.header_left(cmd.label, '*'))
 	}
-	sw := time.new_stopwatch({})
+	sw := time.new_stopwatch()
 	cmd.ecode = os.system(cmd.line)
 	spent := sw.elapsed().milliseconds()
 	println('> Running: "$cmd.line" took: $spent ms ... ' +
diff --git a/cmd/tools/vtest-parser.v b/cmd/tools/vtest-parser.v
index c021f10fbf..e1e829ae6f 100644
--- a/cmd/tools/vtest-parser.v
+++ b/cmd/tools/vtest-parser.v
@@ -73,9 +73,9 @@ fn main() {
 		context.expand_all_paths()
 		mut fails := 0
 		mut panics := 0
-		sw := time.new_stopwatch({})
+		sw := time.new_stopwatch()
 		for path in context.all_paths {
-			filesw := time.new_stopwatch({})
+			filesw := time.new_stopwatch()
 			context.start_printing()
 			new_fails, new_panics := context.process_whole_file_in_worker(path)
 			fails += new_fails
diff --git a/doc/docs.md b/doc/docs.md
index 826a89287a..1b0153ad12 100644
--- a/doc/docs.md
+++ b/doc/docs.md
@@ -4045,7 +4045,7 @@ You can also use stopwatches to measure just portions of your code explicitly:
 import time
 
 fn main() {
-	sw := time.new_stopwatch({})
+	sw := time.new_stopwatch()
 	println('Hello world')
 	println('Greeting the world took: ${sw.elapsed().nanoseconds()}ns')
 }
diff --git a/examples/2048/2048.v b/examples/2048/2048.v
index 5e4871e101..d2372268ea 100644
--- a/examples/2048/2048.v
+++ b/examples/2048/2048.v
@@ -127,8 +127,8 @@ struct Perf {
 mut:
 	frame     int
 	frame_old int
-	frame_sw  time.StopWatch = time.new_stopwatch({})
-	second_sw time.StopWatch = time.new_stopwatch({})
+	frame_sw  time.StopWatch = time.new_stopwatch()
+	second_sw time.StopWatch = time.new_stopwatch()
 }
 
 struct Pos {
@@ -450,7 +450,7 @@ fn (p Prediction) str() string {
 fn (mut app App) ai_move() {
 	mut predictions := [4]Prediction{}
 	mut is_valid := false
-	think_watch := time.new_stopwatch({})
+	think_watch := time.new_stopwatch()
 	for move in possible_moves {
 		move_idx := int(move)
 		predictions[move_idx].move = move
@@ -499,21 +499,21 @@ fn (mut app App) ai_move() {
 fn (app &App) label_format(kind LabelKind) gx.TextCfg {
 	match kind {
 		.points {
-			return {
+			return gx.TextCfg{
 				color: if app.state in [.over, .victory] { gx.white } else { app.theme.text_color }
 				align: .left
 				size: app.ui.font_size / 2
 			}
 		}
 		.moves {
-			return {
+			return gx.TextCfg{
 				color: if app.state in [.over, .victory] { gx.white } else { app.theme.text_color }
 				align: .right
 				size: app.ui.font_size / 2
 			}
 		}
 		.tile {
-			return {
+			return gx.TextCfg{
 				color: app.theme.text_color
 				align: .center
 				vertical_align: .middle
@@ -521,7 +521,7 @@ fn (app &App) label_format(kind LabelKind) gx.TextCfg {
 			}
 		}
 		.victory {
-			return {
+			return gx.TextCfg{
 				color: app.theme.victory_color
 				align: .center
 				vertical_align: .middle
@@ -529,7 +529,7 @@ fn (app &App) label_format(kind LabelKind) gx.TextCfg {
 			}
 		}
 		.game_over {
-			return {
+			return gx.TextCfg{
 				color: app.theme.game_over_color
 				align: .center
 				vertical_align: .middle
@@ -537,7 +537,7 @@ fn (app &App) label_format(kind LabelKind) gx.TextCfg {
 			}
 		}
 		.score_end {
-			return {
+			return gx.TextCfg{
 				color: gx.white
 				align: .center
 				vertical_align: .middle
@@ -823,8 +823,8 @@ fn on_event(e &gg.Event, mut app App) {
 		.touches_began {
 			if e.num_touches > 0 {
 				t := e.touches[0]
-				app.touch.start = {
-					pos: {
+				app.touch.start = Touch{
+					pos: Pos{
 						x: int(t.pos_x / app.ui.dpi_scale)
 						y: int(t.pos_y / app.ui.dpi_scale)
 					}
@@ -835,8 +835,8 @@ fn on_event(e &gg.Event, mut app App) {
 		.touches_ended {
 			if e.num_touches > 0 {
 				t := e.touches[0]
-				app.touch.end = {
-					pos: {
+				app.touch.end = Touch{
+					pos: Pos{
 						x: int(t.pos_x / app.ui.dpi_scale)
 						y: int(t.pos_y / app.ui.dpi_scale)
 					}
@@ -846,8 +846,8 @@ fn on_event(e &gg.Event, mut app App) {
 			}
 		}
 		.mouse_down {
-			app.touch.start = {
-				pos: {
+			app.touch.start = Touch{
+				pos: Pos{
 					x: int(e.mouse_x / app.ui.dpi_scale)
 					y: int(e.mouse_y / app.ui.dpi_scale)
 				}
@@ -855,8 +855,8 @@ fn on_event(e &gg.Event, mut app App) {
 			}
 		}
 		.mouse_up {
-			app.touch.end = {
-				pos: {
+			app.touch.end = Touch{
+				pos: Pos{
 					x: int(e.mouse_x / app.ui.dpi_scale)
 					y: int(e.mouse_y / app.ui.dpi_scale)
 				}
diff --git a/examples/fireworks/modules/objects/particle.v b/examples/fireworks/modules/objects/particle.v
index cd4004d550..8f84a394a9 100644
--- a/examples/fireworks/modules/objects/particle.v
+++ b/examples/fireworks/modules/objects/particle.v
@@ -32,5 +32,5 @@ pub fn (mut particle Particle) tick(mut rocket Rocket, mut ctx gg.Context) {
 	particle.pos += particle.vel
 	particle.draw(mut ctx)
 
-	particle.accel = {}
+	particle.accel = Vector{}
 }
diff --git a/examples/fireworks/modules/objects/rocket.v b/examples/fireworks/modules/objects/rocket.v
index 188c206822..ebdce0aa42 100644
--- a/examples/fireworks/modules/objects/rocket.v
+++ b/examples/fireworks/modules/objects/rocket.v
@@ -39,7 +39,7 @@ pub fn (mut rocket Rocket) tick(mut ctx gg.Context) {
 		rocket.pos += rocket.vel
 		rocket.draw(mut ctx)
 
-		rocket.accel = {}
+		rocket.accel = Vector{}
 	}
 
 	for mut particle in rocket.particles {
@@ -50,10 +50,10 @@ pub fn (mut rocket Rocket) tick(mut ctx gg.Context) {
 pub fn new_rocket() Rocket {
 	return Rocket{
 		color: random_color()
-		pos: {
+		pos: Vector{
 			x: rand.f32_in_range(50, get_params().width - 50)
 		}
-		vel: {
+		vel: Vector{
 			x: rand.f32_in_range(-1.5, 1.5)
 			y: rand.f32_in_range(5, 7)
 		}
diff --git a/examples/fireworks/modules/objects/vector.v b/examples/fireworks/modules/objects/vector.v
index cfcd764740..0e29283fb7 100644
--- a/examples/fireworks/modules/objects/vector.v
+++ b/examples/fireworks/modules/objects/vector.v
@@ -21,7 +21,7 @@ pub fn random_vector_in_circle() Vector {
 	theta := rand.f32n(2 * math.pi)
 	y := rand.f32()
 
-	return {
+	return Vector{
 		x: f32(y * math.sin(theta))
 		y: f32(y * math.cos(theta))
 	}
diff --git a/examples/gg/worker_thread.v b/examples/gg/worker_thread.v
index b1bd454032..a2c9852ab8 100644
--- a/examples/gg/worker_thread.v
+++ b/examples/gg/worker_thread.v
@@ -48,7 +48,7 @@ fn init(mut app App) {
 
 // worker simulates a workload. This should be run in a separate thread.
 fn worker(mut app App) {
-	stopwatch := time.new_stopwatch({})
+	stopwatch := time.new_stopwatch()
 	mut elapsed := stopwatch.elapsed()
 	// Do heavy operations here - like invoking a path finding algorithm, load an image or similar.
 	for {
diff --git a/examples/sokol/sounds/simple_sin_tones.v b/examples/sokol/sounds/simple_sin_tones.v
index cf545142ac..c32711740d 100644
--- a/examples/sokol/sounds/simple_sin_tones.v
+++ b/examples/sokol/sounds/simple_sin_tones.v
@@ -3,7 +3,7 @@ import math
 import sokol.audio
 
 const (
-	sw          = time.new_stopwatch({})
+	sw          = time.new_stopwatch()
 	sw_start_ms = sw.elapsed().milliseconds()
 )
 
diff --git a/examples/term.ui/rectangles.v b/examples/term.ui/rectangles.v
index 9feb9649a9..09e9d6ad54 100644
--- a/examples/term.ui/rectangles.v
+++ b/examples/term.ui/rectangles.v
@@ -20,7 +20,7 @@ mut:
 }
 
 fn random_color() tui.Color {
-	return {
+	return tui.Color{
 		r: byte(rand.intn(256))
 		g: byte(rand.intn(256))
 		b: byte(rand.intn(256))
@@ -32,7 +32,7 @@ fn event(e &tui.Event, x voidptr) {
 	match e.typ {
 		.mouse_down {
 			app.is_drag = true
-			app.cur_rect = {
+			app.cur_rect = Rect{
 				c: random_color()
 				x: e.x
 				y: e.y
diff --git a/examples/term.ui/term_drawing.v b/examples/term.ui/term_drawing.v
index 285cc87d90..df08cb78f0 100644
--- a/examples/term.ui/term_drawing.v
+++ b/examples/term.ui/term_drawing.v
@@ -156,20 +156,20 @@ fn event(event &ui.Event, x voidptr) {
 			app.is_dragging = false
 		}
 		.mouse_drag {
-			app.mouse_pos = {
+			app.mouse_pos = Point{
 				x: event.x
 				y: event.y
 			}
 			app.paint(event)
 		}
 		.mouse_move {
-			app.mouse_pos = {
+			app.mouse_pos = Point{
 				x: event.x
 				y: event.y
 			}
 		}
 		.mouse_scroll {
-			app.mouse_pos = {
+			app.mouse_pos = Point{
 				x: event.x
 				y: event.y
 			}
diff --git a/examples/term.ui/text_editor.v b/examples/term.ui/text_editor.v
index 11bf4b0a7a..78e6e40f1f 100644
--- a/examples/term.ui/text_editor.v
+++ b/examples/term.ui/text_editor.v
@@ -147,9 +147,9 @@ fn (b Buffer) view(from int, to int) View {
 		}
 	}
 	raw := lines.join('\n')
-	return {
+	return View{
 		raw: raw.replace('\t', strings.repeat(` `, b.tab_width))
-		cursor: {
+		cursor: Cursor{
 			pos_x: x
 			pos_y: b.cursor.pos_y
 		}
diff --git a/examples/term.ui/vyper.v b/examples/term.ui/vyper.v
index c5712c3b5d..cf41e605f8 100644
--- a/examples/term.ui/vyper.v
+++ b/examples/term.ui/vyper.v
@@ -60,7 +60,7 @@ fn (mut v Vec) randomize(min_x int, min_y int, max_x int, max_y int) {
 // part of snake's body representation
 struct BodyPart {
 mut:
-	pos Vec = {
+	pos Vec = Vec{
 		x: block_size
 		y: block_size
 	}
@@ -241,7 +241,7 @@ fn (s Snake) draw() {
 // rat representation
 struct Rat {
 mut:
-	pos Vec = {
+	pos Vec = Vec{
 		x: block_size
 		y: block_size
 	}
diff --git a/examples/tetris/tetris.v b/examples/tetris/tetris.v
index 6b452932e5..01589a3670 100644
--- a/examples/tetris/tetris.v
+++ b/examples/tetris/tetris.v
@@ -119,8 +119,8 @@ mut:
 	// frame/time counters:
 	frame     int
 	frame_old int
-	frame_sw  time.StopWatch = time.new_stopwatch({})
-	second_sw time.StopWatch = time.new_stopwatch({})
+	frame_sw  time.StopWatch = time.new_stopwatch()
+	second_sw time.StopWatch = time.new_stopwatch()
 }
 
 fn remap(v f32, min f32, max f32, new_min f32, new_max f32) f32 {
diff --git a/vlib/benchmark/benchmark.v b/vlib/benchmark/benchmark.v
index ce8df9bd8b..cd9f9944c7 100644
--- a/vlib/benchmark/benchmark.v
+++ b/vlib/benchmark/benchmark.v
@@ -29,7 +29,7 @@ pub mut:
 // new_benchmark returns a `Benchmark` instance on the stack.
 pub fn new_benchmark() Benchmark {
 	return Benchmark{
-		bench_timer: time.new_stopwatch({})
+		bench_timer: time.new_stopwatch()
 		verbose: true
 	}
 }
@@ -37,7 +37,7 @@ pub fn new_benchmark() Benchmark {
 // new_benchmark_no_cstep returns a new `Benchmark` instance with step counting disabled.
 pub fn new_benchmark_no_cstep() Benchmark {
 	return Benchmark{
-		bench_timer: time.new_stopwatch({})
+		bench_timer: time.new_stopwatch()
 		verbose: true
 		no_cstep: true
 	}
@@ -47,7 +47,7 @@ pub fn new_benchmark_no_cstep() Benchmark {
 // This is useful for long-lived use of `Benchmark` instances.
 pub fn new_benchmark_pointer() &Benchmark {
 	return &Benchmark{
-		bench_timer: time.new_stopwatch({})
+		bench_timer: time.new_stopwatch()
 		verbose: true
 	}
 }
diff --git a/vlib/builtin/js/builtin.v b/vlib/builtin/js/builtin.v
index 9fe53ce564..86b60ad6e8 100644
--- a/vlib/builtin/js/builtin.v
+++ b/vlib/builtin/js/builtin.v
@@ -79,7 +79,7 @@ pub fn (o Option) str() string {
 pub fn error(s string) Option {
 	return Option{
 		state: 2
-		err: {
+		err: Error{
 			msg: s
 		}
 	}
@@ -88,7 +88,7 @@ pub fn error(s string) Option {
 pub fn error_with_code(s string, code int) Option {
 	return Option{
 		state: 2
-		err: {
+		err: Error{
 			msg: s
 			code: code
 		}
diff --git a/vlib/gg/text_rendering.v b/vlib/gg/text_rendering.v
index 630b3bd446..dd0499d06e 100644
--- a/vlib/gg/text_rendering.v
+++ b/vlib/gg/text_rendering.v
@@ -193,7 +193,7 @@ pub fn (ctx &Context) draw_text(x int, y int, text_ string, cfg gx.TextCfg) {
 }
 
 pub fn (ctx &Context) draw_text_def(x int, y int, text string) {
-	ctx.draw_text(x, y, text, {})
+	ctx.draw_text(x, y, text)
 }
 
 /*
diff --git a/vlib/io/readerwriter.v b/vlib/io/readerwriter.v
index fccd51f1d9..ba44172ead 100644
--- a/vlib/io/readerwriter.v
+++ b/vlib/io/readerwriter.v
@@ -27,7 +27,7 @@ pub fn (mut r ReaderWriterImpl) write(buf []byte) ?int {
 // make_readerwriter takes a rstream and a wstream and makes
 // an rwstream with them
 pub fn make_readerwriter(r Reader, w Writer) ReaderWriterImpl {
-	return {
+	return ReaderWriterImpl{
 		r: r
 		w: w
 	}
diff --git a/vlib/io/util/util.v b/vlib/io/util/util.v
index e27be3f3ee..6f0d93f516 100644
--- a/vlib/io/util/util.v
+++ b/vlib/io/util/util.v
@@ -24,7 +24,7 @@ pub fn temp_file(tfo TempFileOptions) ?(os.File, string) {
 			' could not create temporary file in "$d". Please ensure write permissions.')
 	}
 	d = d.trim_right(os.path_separator)
-	mut rng := rand.new_default({})
+	mut rng := rand.new_default()
 	prefix, suffix := prefix_and_suffix(tfo.pattern) or { return error(@FN + ' ' + err.msg) }
 	for retry := 0; retry < util.retries; retry++ {
 		path := os.join_path(d, prefix + random_number(mut rng) + suffix)
@@ -60,7 +60,7 @@ pub fn temp_dir(tdo TempFileOptions) ?string {
 			' could not create temporary directory "$d". Please ensure write permissions.')
 	}
 	d = d.trim_right(os.path_separator)
-	mut rng := rand.new_default({})
+	mut rng := rand.new_default()
 	prefix, suffix := prefix_and_suffix(tdo.pattern) or { return error(@FN + ' ' + err.msg) }
 	for retry := 0; retry < util.retries; retry++ {
 		path := os.join_path(d, prefix + random_number(mut rng) + suffix)
diff --git a/vlib/io/util/util_test.v b/vlib/io/util/util_test.v
index 4cdf9dc2b0..1072cb58b8 100644
--- a/vlib/io/util/util_test.v
+++ b/vlib/io/util/util_test.v
@@ -26,7 +26,7 @@ fn testsuite_end() {
 
 fn test_temp_file() {
 	// Test defaults
-	mut f, mut path := util.temp_file({}) or {
+	mut f, mut path := util.temp_file() or {
 		assert false
 		return
 	}
@@ -76,7 +76,7 @@ fn test_temp_file() {
 
 fn test_temp_dir() {
 	// Test defaults
-	mut path := util.temp_dir({}) or {
+	mut path := util.temp_dir() or {
 		assert false
 		return
 	}
diff --git a/vlib/net/address.v b/vlib/net/address.v
index ecc65c6fa8..af1a000caf 100644
--- a/vlib/net/address.v
+++ b/vlib/net/address.v
@@ -17,8 +17,8 @@ const (
 fn new_ip6(port u16, addr [16]byte) Addr {
 	a := Addr{
 		f: u16(AddrFamily.ip6)
-		addr: {
-			Ip6: {
+		addr: AddrData{
+			Ip6: Ip6{
 				port: u16(C.htons(port))
 			}
 		}
@@ -32,8 +32,8 @@ fn new_ip6(port u16, addr [16]byte) Addr {
 fn new_ip(port u16, addr [4]byte) Addr {
 	a := Addr{
 		f: u16(AddrFamily.ip)
-		addr: {
-			Ip: {
+		addr: AddrData{
+			Ip: Ip{
 				port: u16(C.htons(port))
 			}
 		}
@@ -49,7 +49,7 @@ fn temp_unix() ?Addr {
 	// close it
 	// remove it
 	// then reuse the filename
-	mut file, filename := util.temp_file({}) ?
+	mut file, filename := util.temp_file() ?
 	file.close()
 	os.rm(filename) ?
 	addrs := resolve_addrs(filename, .unix, .udp) ?
@@ -203,8 +203,8 @@ pub fn resolve_ipaddrs(addr string, family AddrFamily, typ SocketType) ?[]Addr {
 		match AddrFamily(result.ai_family) {
 			.ip, .ip6 {
 				new_addr := Addr{
-					addr: {
-						Ip6: {}
+					addr: AddrData{
+						Ip6: Ip6{}
 					}
 				}
 				unsafe {
@@ -246,8 +246,8 @@ fn (a Addr) str() string {
 
 pub fn addr_from_socket_handle(handle int) Addr {
 	addr := Addr{
-		addr: {
-			Ip6: {}
+		addr: AddrData{
+			Ip6: Ip6{}
 		}
 	}
 	size := sizeof(addr)
diff --git a/vlib/net/tcp.v b/vlib/net/tcp.v
index a12b20273c..b7a34944ce 100644
--- a/vlib/net/tcp.v
+++ b/vlib/net/tcp.v
@@ -165,8 +165,8 @@ pub fn (mut c TcpConn) wait_for_write() ? {
 
 pub fn (c &TcpConn) peer_addr() ?Addr {
 	mut addr := Addr{
-		addr: {
-			Ip6: {}
+		addr: AddrData{
+			Ip6: Ip6{}
 		}
 	}
 	mut size := sizeof(Addr)
@@ -217,8 +217,8 @@ pub fn listen_tcp(family AddrFamily, saddr string) ?&TcpListener {
 
 pub fn (mut l TcpListener) accept() ?&TcpConn {
 	addr := Addr{
-		addr: {
-			Ip6: {}
+		addr: AddrData{
+			Ip6: Ip6{}
 		}
 	}
 	size := sizeof(Addr)
diff --git a/vlib/net/udp.v b/vlib/net/udp.v
index 190393fd41..1df40037b4 100644
--- a/vlib/net/udp.v
+++ b/vlib/net/udp.v
@@ -104,8 +104,8 @@ pub fn (mut c UdpConn) write_to_string(addr Addr, s string) ?int {
 // read reads from the socket into buf up to buf.len returning the number of bytes read
 pub fn (mut c UdpConn) read(mut buf []byte) ?(int, Addr) {
 	mut addr := Addr{
-		addr: {
-			Ip6: {}
+		addr: AddrData{
+			Ip6: Ip6{}
 		}
 	}
 	len := sizeof(Addr)
@@ -206,8 +206,8 @@ fn new_udp_socket(local_addr Addr) ?&UdpSocket {
 		handle: sockfd
 		l: local_addr
 		r: Addr{
-			addr: {
-				Ip6: {}
+			addr: AddrData{
+				Ip6: Ip6{}
 			}
 		}
 	}
@@ -246,8 +246,8 @@ fn new_udp_socket_for_remote(raddr Addr) ?&UdpSocket {
 			panic('Invalid family')
 			// Appease compiler
 			Addr{
-				addr: {
-					Ip6: {}
+				addr: AddrData{
+					Ip6: Ip6{}
 				}
 			}
 		}
diff --git a/vlib/rand/dist/dist.v b/vlib/rand/dist/dist.v
index 5ebf256476..b2d905594d 100644
--- a/vlib/rand/dist/dist.v
+++ b/vlib/rand/dist/dist.v
@@ -40,7 +40,7 @@ pub struct NormalConfigStruct {
 
 // normal_pair returns a pair of normally distributed random numbers with the mean mu
 // and standard deviation sigma. If not specified, mu is 0 and sigma is 1. Intended usage is
-// `x, y := normal_pair(mu: mean, sigma: stdev)`, or `x, y := normal_pair({})`.
+// `x, y := normal_pair(mu: mean, sigma: stdev)`, or `x, y := normal_pair()`.
 pub fn normal_pair(config NormalConfigStruct) (f64, f64) {
 	if config.sigma <= 0 {
 		panic('The standard deviation has to be positive.')
@@ -66,7 +66,7 @@ pub fn normal_pair(config NormalConfigStruct) (f64, f64) {
 
 // normal returns a normally distributed random number with the mean mu and standard deviation
 // sigma. If not specified, mu is 0 and sigma is 1. Intended usage is
-// `x := normal(mu: mean, sigma: etdev)` or `x := normal({})`.
+// `x := normal(mu: mean, sigma: etdev)` or `x := normal()`.
 // **NOTE:** If you are generating a lot of normal variates, use `the normal_pair` function
 // instead. This function discards one of the two variates generated by the `normal_pair` function.
 pub fn normal(config NormalConfigStruct) f64 {
diff --git a/vlib/rand/rand.v b/vlib/rand/rand.v
index ef832500da..0136ec1a96 100644
--- a/vlib/rand/rand.v
+++ b/vlib/rand/rand.v
@@ -49,7 +49,7 @@ __global (
 
 // init initializes the default RNG.
 fn init() {
-	default_rng = new_default({})
+	default_rng = new_default()
 }
 
 // new_default returns a new instance of the default RNG. If the seed is not provided, the current time will be used to seed the instance.
diff --git a/vlib/sync/bench/channel_bench_v.v b/vlib/sync/bench/channel_bench_v.v
index aa1189f739..54dcfe974b 100644
--- a/vlib/sync/bench/channel_bench_v.v
+++ b/vlib/sync/bench/channel_bench_v.v
@@ -32,7 +32,7 @@ fn main() {
 	nrec := os.args[2].int()
 	buflen := os.args[3].int()
 	nobj := os.args[4].int()
-	stopwatch := time.new_stopwatch({})
+	stopwatch := time.new_stopwatch()
 	ch := chan int{cap: buflen}
 	resch := chan i64{}
 	mut no := nobj
diff --git a/vlib/sync/bench/many_writers_and_receivers_on_1_channel.v b/vlib/sync/bench/many_writers_and_receivers_on_1_channel.v
index d7db2b40de..999bb1dfa2 100644
--- a/vlib/sync/bench/many_writers_and_receivers_on_1_channel.v
+++ b/vlib/sync/bench/many_writers_and_receivers_on_1_channel.v
@@ -36,7 +36,7 @@ mut:
 
 fn do_rec(ch chan int, id int, mut ctx Context) {
 	eprintln('start of  do_rec id: $id')
-	mut timer_sw_x := time.new_stopwatch({})
+	mut timer_sw_x := time.new_stopwatch()
 	mut tmp := int(0)
 	mut i := int(0)
 	// NB: a single receiver thread can get slightly more
@@ -69,7 +69,7 @@ fn do_rec(ch chan int, id int, mut ctx Context) {
 
 fn do_send(ch chan int, id int, mut ctx Context) {
 	eprintln('start of do_send id: $id')
-	mut timer_sw_x := time.new_stopwatch({})
+	mut timer_sw_x := time.new_stopwatch()
 	n_iters := ctx.n_iters
 	base := n_iters * id // sender events can not overlap
 	for i := 0; i < n_iters; i++ {
diff --git a/vlib/sync/channel_select_3_test.v b/vlib/sync/channel_select_3_test.v
index 6a6c503e3d..9954ee3afe 100644
--- a/vlib/sync/channel_select_3_test.v
+++ b/vlib/sync/channel_select_3_test.v
@@ -86,7 +86,7 @@ fn test_select_blocks() {
 		a: 13
 	}
 	sem.wait()
-	stopwatch := time.new_stopwatch({})
+	stopwatch := time.new_stopwatch()
 	go f1(ch1, ch2, ch3, ch4, ch5, mut sem)
 	sem.wait()
 	elapsed_ms := f64(stopwatch.elapsed()) / time.millisecond
diff --git a/vlib/sync/channels.v b/vlib/sync/channels.v
index 8acd6d326b..49f1396d49 100644
--- a/vlib/sync/channels.v
+++ b/vlib/sync/channels.v
@@ -648,7 +648,7 @@ pub fn channel_select(mut channels []&Channel, dir []Direction, mut objrefs []vo
 	stopwatch := if timeout == time.infinite || timeout <= 0 {
 		time.StopWatch{}
 	} else {
-		time.new_stopwatch({})
+		time.new_stopwatch()
 	}
 	mut event_idx := -1 // negative index means `timed out`
 
diff --git a/vlib/time/stopwatch_test.v b/vlib/time/stopwatch_test.v
index 16eadbabf3..49d005a556 100644
--- a/vlib/time/stopwatch_test.v
+++ b/vlib/time/stopwatch_test.v
@@ -4,7 +4,7 @@ import time
 // time than you have specified. To avoid false positives from CI test
 // failures, some of the asserts will be run only if you pass `-d stopwatch`
 fn test_stopwatch_works_as_intended() {
-	mut sw := time.new_stopwatch({})
+	mut sw := time.new_stopwatch()
 	// sample code that you want to measure:
 	println('Hello world')
 	time.sleep(1 * time.millisecond)
@@ -15,7 +15,7 @@ fn test_stopwatch_works_as_intended() {
 
 fn test_stopwatch_time_between_pause_and_start_should_be_skipped_in_elapsed() {
 	println('Testing pause function')
-	mut sw := time.new_stopwatch({})
+	mut sw := time.new_stopwatch()
 	time.sleep(10 * time.millisecond) // A
 	eprintln('Elapsed after 10ms nap: ${sw.elapsed().milliseconds()}ms')
 	assert sw.elapsed().milliseconds() >= 8 // sometimes it sleeps for 9ms on windows..
diff --git a/vlib/v/ast/table.v b/vlib/v/ast/table.v
index 65f72fc2ba..71d1d4aec5 100644
--- a/vlib/v/ast/table.v
+++ b/vlib/v/ast/table.v
@@ -556,7 +556,7 @@ fn (mut t Table) check_for_already_registered_symbol(typ TypeSymbol, existing_id
 		.placeholder {
 			// override placeholder
 			// println('overriding type placeholder `$typ.name`')
-			t.type_symbols[existing_idx] = {
+			t.type_symbols[existing_idx] = TypeSymbol{
 				...typ
 				methods: ex_type.methods
 			}
diff --git a/vlib/v/builder/compile.v b/vlib/v/builder/compile.v
index 29250aec71..22b3c9e9cc 100644
--- a/vlib/v/builder/compile.v
+++ b/vlib/v/builder/compile.v
@@ -37,7 +37,7 @@ pub fn compile(command string, pref &pref.Preferences) {
 		println('builder.compile() pref:')
 		// println(pref)
 	}
-	mut sw := time.new_stopwatch({})
+	mut sw := time.new_stopwatch()
 	match pref.backend {
 		.c { b.compile_c() }
 		.js_node, .js_freestanding, .js_browser { b.compile_js() }
diff --git a/vlib/v/checker/checker.v b/vlib/v/checker/checker.v
index afb5942236..b6b356c9a1 100644
--- a/vlib/v/checker/checker.v
+++ b/vlib/v/checker/checker.v
@@ -1988,7 +1988,7 @@ pub fn (mut c Checker) check_expected_arg_count(mut call_expr ast.CallExpr, f &a
 			last_sym := c.table.get_type_symbol(last_typ)
 			if last_sym.kind == .struct_ {
 				// allow empty trailing struct syntax arg (`f()` where `f` is `fn(ConfigStruct)`)
-				call_expr.args << {
+				call_expr.args << ast.CallArg{
 					expr: ast.StructInit{
 						typ: last_typ
 					}
diff --git a/vlib/v/checker/tests/array_or_map_assign_err.out b/vlib/v/checker/tests/array_or_map_assign_err.out
index c1788de34e..fca758ba42 100644
--- a/vlib/v/checker/tests/array_or_map_assign_err.out
+++ b/vlib/v/checker/tests/array_or_map_assign_err.out
@@ -10,11 +10,11 @@ vlib/v/checker/tests/array_or_map_assign_err.vv:5:5: error: use `array2 = array1
     4 |     mut a3 := []int{}
     5 |     a3 = a1
       |        ^
-    6 | 
-    7 |     m1 := {'one': 1}
+    6 |
+    7 |     m1 := map{'one': 1}
 vlib/v/checker/tests/array_or_map_assign_err.vv:8:8: error: cannot copy map: call `move` or `clone` method (or use a reference)
-    6 | 
-    7 |     m1 := {'one': 1}
+    6 |
+    7 |     m1 := map{'one': 1}
     8 |     m2 := m1
       |           ~~
     9 |     mut m3 := map[string]int{}
@@ -24,10 +24,10 @@ vlib/v/checker/tests/array_or_map_assign_err.vv:10:7: error: cannot copy map: ca
     9 |     mut m3 := map[string]int{}
    10 |     m3 = m1
       |          ~~
-   11 | 
+   11 |
    12 |     _ = a2
 vlib/v/checker/tests/array_or_map_assign_err.vv:25:8: error: cannot copy map: call `move` or `clone` method (or use a reference)
-   23 | 
+   23 |
    24 | fn foo(mut m map[string]int) {
    25 |     m2 := m
       |           ^
diff --git a/vlib/v/checker/tests/array_or_map_assign_err.vv b/vlib/v/checker/tests/array_or_map_assign_err.vv
index f2463c8001..517a25d0b8 100644
--- a/vlib/v/checker/tests/array_or_map_assign_err.vv
+++ b/vlib/v/checker/tests/array_or_map_assign_err.vv
@@ -4,7 +4,7 @@ fn main() {
 	mut a3 := []int{}
 	a3 = a1
 
-	m1 := {'one': 1}
+	m1 := map{'one': 1}
 	m2 := m1
 	mut m3 := map[string]int{}
 	m3 = m1
@@ -12,7 +12,7 @@ fn main() {
 	_ = a2
 	_ = m2
 
-	mut m := {'foo':1}
+	mut m := map{'foo':1}
 	foo(mut m)
 
 	_ = a3
diff --git a/vlib/v/checker/tests/for_in_map_one_variable_err.out b/vlib/v/checker/tests/for_in_map_one_variable_err.out
index 48c26cce49..d7c6579ec2 100644
--- a/vlib/v/checker/tests/for_in_map_one_variable_err.out
+++ b/vlib/v/checker/tests/for_in_map_one_variable_err.out
@@ -1,7 +1,7 @@
 vlib/v/checker/tests/for_in_map_one_variable_err.vv:3:6: error: declare a key and a value variable when ranging a map: `for key, val in map {`
 use `_` if you do not need the variable
     1 | fn main() {
-    2 |     kvs := {'foo':'bar'}
+    2 |     kvs := map{'foo':'bar'}
     3 |     for k in kvs {
       |         ^
     4 |         println('$k')
diff --git a/vlib/v/checker/tests/for_in_map_one_variable_err.vv b/vlib/v/checker/tests/for_in_map_one_variable_err.vv
index 601c613df9..9297280ec7 100644
--- a/vlib/v/checker/tests/for_in_map_one_variable_err.vv
+++ b/vlib/v/checker/tests/for_in_map_one_variable_err.vv
@@ -1,5 +1,5 @@
 fn main() {
-	kvs := {'foo':'bar'}
+	kvs := map{'foo':'bar'}
 	for k in kvs {
 		println('$k')
 	}
diff --git a/vlib/v/checker/tests/for_in_mut_val_type.out b/vlib/v/checker/tests/for_in_mut_val_type.out
index 72ae690c45..d898cf75a4 100644
--- a/vlib/v/checker/tests/for_in_mut_val_type.out
+++ b/vlib/v/checker/tests/for_in_mut_val_type.out
@@ -14,7 +14,7 @@ vlib/v/checker/tests/for_in_mut_val_type.vv:7:15: error: `a2` is immutable, it c
     9 |     }
 vlib/v/checker/tests/for_in_mut_val_type.vv:11:18: error: `m` is immutable, it cannot be changed
     9 |     }
-   10 |     m := {'aa': 1, 'bb': 2}
+   10 |     m := map{'aa': 1, 'bb': 2}
    11 |     for _, mut j in m {
       |                     ^
    12 |         j *= 2
@@ -33,10 +33,10 @@ vlib/v/checker/tests/for_in_mut_val_type.vv:17:15: error: array literal is immut
       |                  ~~~~~~~~~~
    18 |         j *= 2
    19 |     }
-vlib/v/checker/tests/for_in_mut_val_type.vv:20:18: error: map literal is immutable, it cannot be changed
+vlib/v/checker/tests/for_in_mut_val_type.vv:20:21: error: map literal is immutable, it cannot be changed
    18 |         j *= 2
    19 |     }
-   20 |     for _, mut j in {'aa': 1, 'bb': 2} {
-      |                     ~~~~~~~~~~~~~~~~~~
+   20 |     for _, mut j in map{'aa': 1, 'bb': 2} {
+      |                        ~~~~~~~~~~~~~~~~~~
    21 |         j *= 2
-   22 |     }
+   22 |     }
\ No newline at end of file
diff --git a/vlib/v/checker/tests/for_in_mut_val_type.vv b/vlib/v/checker/tests/for_in_mut_val_type.vv
index afd714bdf5..664fb66cf8 100644
--- a/vlib/v/checker/tests/for_in_mut_val_type.vv
+++ b/vlib/v/checker/tests/for_in_mut_val_type.vv
@@ -7,7 +7,7 @@ fn main() {
 	for mut j in a2 {
 		j *= 2
 	}
-	m := {'aa': 1, 'bb': 2}
+	m := map{'aa': 1, 'bb': 2}
 	for _, mut j in m {
 		j *= 2
 	}
@@ -17,7 +17,7 @@ fn main() {
 	for mut j in [1, 2, 3]! {
 		j *= 2
 	}
-	for _, mut j in {'aa': 1, 'bb': 2} {
+	for _, mut j in map{'aa': 1, 'bb': 2} {
 		j *= 2
 	}
 }
diff --git a/vlib/v/checker/tests/in_mismatch_type.vv b/vlib/v/checker/tests/in_mismatch_type.vv
index 2fc2bde89e..4a5dc697c3 100644
--- a/vlib/v/checker/tests/in_mismatch_type.vv
+++ b/vlib/v/checker/tests/in_mismatch_type.vv
@@ -3,7 +3,7 @@ type Int = int
 fn main() {
 	a_i := [1, 2, 3]
 	a_s := ['1', '2', '3']
-	m := {
+	m := map{
 		'test': 1
 	}
 	s := 'abcd'
diff --git a/vlib/v/checker/tests/map_delete.out b/vlib/v/checker/tests/map_delete.out
index ecfbca0e21..c3a1822113 100644
--- a/vlib/v/checker/tests/map_delete.out
+++ b/vlib/v/checker/tests/map_delete.out
@@ -4,13 +4,13 @@ vlib/v/checker/tests/map_delete.vv:5:11: error: cannot use `int literal` as `str
     5 |     m.delete(1)
       |              ^
     6 |     m.delete(1, 2)
-    7 |     m2 := {
+    7 |     m2 := map{
 vlib/v/checker/tests/map_delete.vv:6:4: error: expected 1 argument, but got 2
     4 |     }
     5 |     m.delete(1)
     6 |     m.delete(1, 2)
       |       ~~~~~~~~~~~~
-    7 |     m2 := {
+    7 |     m2 := map{
     8 |         '1': 1
 vlib/v/checker/tests/map_delete.vv:10:2: error: `m2` is immutable, declare it with `mut` to make it mutable
     8 |         '1': 1
diff --git a/vlib/v/checker/tests/map_delete.vv b/vlib/v/checker/tests/map_delete.vv
index 0be6d170aa..26b26067c4 100644
--- a/vlib/v/checker/tests/map_delete.vv
+++ b/vlib/v/checker/tests/map_delete.vv
@@ -1,11 +1,11 @@
 fn main() {
-	mut m := {
+	mut m := map{
 		'1': 1
 	}
 	m.delete(1)
 	m.delete(1, 2)
-	m2 := {
+	m2 := map{
 		'1': 1
 	}
 	m2.delete('1')
-}
\ No newline at end of file
+}
diff --git a/vlib/v/checker/tests/map_init_key_duplicate_err.out b/vlib/v/checker/tests/map_init_key_duplicate_err.out
index 5798002c82..d560b64116 100644
--- a/vlib/v/checker/tests/map_init_key_duplicate_err.out
+++ b/vlib/v/checker/tests/map_init_key_duplicate_err.out
@@ -5,9 +5,9 @@ vlib/v/checker/tests/map_init_key_duplicate_err.vv:5:3: error: duplicate key "fo
       |         ~~~~~
     6 |     }
     7 |     println(a)
-vlib/v/checker/tests/map_init_key_duplicate_err.vv:9:15: error: duplicate key "2" in map literal
+vlib/v/checker/tests/map_init_key_duplicate_err.vv:9:18: error: duplicate key "2" in map literal
     7 |     println(a)
-    8 |     
-    9 |     _ = {2:0 3:0 2:0}
-      |                  ^
-   10 | }
+    8 |
+    9 |     _ = map{2:0 3:0 2:0}
+      |                     ^
+   10 | }
\ No newline at end of file
diff --git a/vlib/v/checker/tests/map_init_key_duplicate_err.vv b/vlib/v/checker/tests/map_init_key_duplicate_err.vv
index 952c003726..cd6efe6663 100644
--- a/vlib/v/checker/tests/map_init_key_duplicate_err.vv
+++ b/vlib/v/checker/tests/map_init_key_duplicate_err.vv
@@ -1,10 +1,10 @@
 fn main() {
-	a := {
+	a := map{
 		'foo': 'bar'
 		'abc': 'abc'
 		'foo': 'bar'
 	}
 	println(a)
-	
-	_ = {2:0 3:0 2:0}
+
+	_ = map{2:0 3:0 2:0}
 }
diff --git a/vlib/v/checker/tests/map_init_wrong_type.out b/vlib/v/checker/tests/map_init_wrong_type.out
index 579f53ef28..117e787c9c 100644
--- a/vlib/v/checker/tests/map_init_wrong_type.out
+++ b/vlib/v/checker/tests/map_init_wrong_type.out
@@ -1,21 +1,21 @@
-vlib/v/checker/tests/map_init_wrong_type.vv:3:15: error: invalid map value: expected `f32`, not `float literal`
+vlib/v/checker/tests/map_init_wrong_type.vv:3:18: error: invalid map value: expected `f32`, not `float literal`
     1 | fn main() {
     2 |    mut a := map[string]f32{}
-    3 |    a = { 'x': 12.3 }
-      |               ~~~~
-    4 |    _ = {2:0 3:0 "hi":0}
-    5 |    _ = {2:0 3:`@` 4:0}
-vlib/v/checker/tests/map_init_wrong_type.vv:4:17: error: invalid map key: expected `int`, not `string`
+    3 |    a = map{ 'x': 12.3 }
+      |                  ~~~~
+    4 |    _ = map{2:0 3:0 "hi":0}
+    5 |    _ = map{2:0 3:`@` 4:0}
+vlib/v/checker/tests/map_init_wrong_type.vv:4:20: error: invalid map key: expected `int`, not `string`
     2 |    mut a := map[string]f32{}
-    3 |    a = { 'x': 12.3 }
-    4 |    _ = {2:0 3:0 "hi":0}
-      |                 ~~~~
-    5 |    _ = {2:0 3:`@` 4:0}
+    3 |    a = map{ 'x': 12.3 }
+    4 |    _ = map{2:0 3:0 "hi":0}
+      |                    ~~~~
+    5 |    _ = map{2:0 3:`@` 4:0}
     6 |   _ = a
-vlib/v/checker/tests/map_init_wrong_type.vv:5:15: error: invalid map value: expected `int`, not `rune`
-    3 |    a = { 'x': 12.3 }
-    4 |    _ = {2:0 3:0 "hi":0}
-    5 |    _ = {2:0 3:`@` 4:0}
-      |               ~~~
+vlib/v/checker/tests/map_init_wrong_type.vv:5:18: error: invalid map value: expected `int`, not `rune`
+    3 |    a = map{ 'x': 12.3 }
+    4 |    _ = map{2:0 3:0 "hi":0}
+    5 |    _ = map{2:0 3:`@` 4:0}
+      |                  ~~~
     6 |   _ = a
-    7 | }
+    7 | }
\ No newline at end of file
diff --git a/vlib/v/checker/tests/map_init_wrong_type.vv b/vlib/v/checker/tests/map_init_wrong_type.vv
index 56b7b960f3..dc41230625 100644
--- a/vlib/v/checker/tests/map_init_wrong_type.vv
+++ b/vlib/v/checker/tests/map_init_wrong_type.vv
@@ -1,7 +1,7 @@
 fn main() {
    mut a := map[string]f32{}
-   a = { 'x': 12.3 }
-   _ = {2:0 3:0 "hi":0}
-   _ = {2:0 3:`@` 4:0}
+   a = map{ 'x': 12.3 }
+   _ = map{2:0 3:0 "hi":0}
+   _ = map{2:0 3:`@` 4:0}
   _ = a
 }
diff --git a/vlib/v/checker/tests/mut_map_get_value_address_err.out b/vlib/v/checker/tests/mut_map_get_value_address_err.out
index 0a8983ffa9..297c22825c 100644
--- a/vlib/v/checker/tests/mut_map_get_value_address_err.out
+++ b/vlib/v/checker/tests/mut_map_get_value_address_err.out
@@ -1,6 +1,6 @@
 vlib/v/checker/tests/mut_map_get_value_address_err.vv:3:12: error: cannot take the address of map values
     1 | fn main() {
-    2 |     mut m := {'key' : 3}
+    2 |     mut m := map{'key' : 3}
     3 |     a := &m['key']
       |            ~~~~~~~
     4 |     println(a)
diff --git a/vlib/v/checker/tests/mut_map_get_value_address_err.vv b/vlib/v/checker/tests/mut_map_get_value_address_err.vv
index 1f3cc58a9d..46e5b771af 100644
--- a/vlib/v/checker/tests/mut_map_get_value_address_err.vv
+++ b/vlib/v/checker/tests/mut_map_get_value_address_err.vv
@@ -1,5 +1,5 @@
 fn main() {
-    mut m := {'key' : 3}
+    mut m := map{'key' : 3}
     a := &m['key']
     println(a)
 }
diff --git a/vlib/v/checker/tests/no_interface_instantiation_b.out b/vlib/v/checker/tests/no_interface_instantiation_b.out
index 380417c64f..0a8f1b985e 100644
--- a/vlib/v/checker/tests/no_interface_instantiation_b.out
+++ b/vlib/v/checker/tests/no_interface_instantiation_b.out
@@ -1,6 +1,6 @@
-vlib/v/checker/tests/no_interface_instantiation_b.vv:6:12: error: cannot instantiate interface `Speaker`
+vlib/v/checker/tests/no_interface_instantiation_b.vv:6:5: error: expected 1 arguments, but got 0
     4 |
     5 | fn main() {
-    6 |     my_fn({})
-      |            ^
+    6 |     my_fn()
+      |     ~~~~~~~
     7 | }
\ No newline at end of file
diff --git a/vlib/v/checker/tests/no_interface_instantiation_b.vv b/vlib/v/checker/tests/no_interface_instantiation_b.vv
index 01d47c8d10..4c73538868 100644
--- a/vlib/v/checker/tests/no_interface_instantiation_b.vv
+++ b/vlib/v/checker/tests/no_interface_instantiation_b.vv
@@ -3,5 +3,5 @@ interface Speaker {}
 fn my_fn(s Speaker) {}
 
 fn main() {
-    my_fn({})
+    my_fn()
 }
diff --git a/vlib/v/checker/tests/shared_bad_args.vv b/vlib/v/checker/tests/shared_bad_args.vv
index 08e5d8a69b..f0d4913491 100644
--- a/vlib/v/checker/tests/shared_bad_args.vv
+++ b/vlib/v/checker/tests/shared_bad_args.vv
@@ -37,7 +37,7 @@ fn a_val(a []int) int {
 fn test_shared_as_value() {
 	shared s := St{ a: 5 }
 	shared a := [3, 4, 6, 13, -23]
-	shared m := {'qw': 12.75, 'yxcv': -3.125, 'poiu': 88.0625}
+	shared m := map{'qw': 12.75, 'yxcv': -3.125, 'poiu': 88.0625}
 	shared r := Qr{ a: 7 }
 	lock s {
 		u := r.s_val(s)
@@ -55,7 +55,7 @@ fn test_shared_as_value() {
 fn test_shared_as_mut() {
 	shared s := St{ a: 5 }
 	shared a := [3, 4, 6, 13, -23]
-	shared m := {'qw': 12.75, 'yxcv': -3.125, 'poiu': 88.0625}
+	shared m := map{'qw': 12.75, 'yxcv': -3.125, 'poiu': 88.0625}
 	shared r := Qr{ a: 7 }
 	lock s {
 		r.s_mut(mut s)
diff --git a/vlib/v/checker/tests/struct_assigned_to_pointer_to_struct.out b/vlib/v/checker/tests/struct_assigned_to_pointer_to_struct.out
index 666f29561d..54b047e060 100644
--- a/vlib/v/checker/tests/struct_assigned_to_pointer_to_struct.out
+++ b/vlib/v/checker/tests/struct_assigned_to_pointer_to_struct.out
@@ -1,14 +1,7 @@
 vlib/v/checker/tests/struct_assigned_to_pointer_to_struct.vv:5:4: error: mismatched types `&Foo` and `Foo`
     3 | fn main() {
     4 |     mut f := &Foo{ 10 }
-    5 |     f = { x: 223344 }
+    5 |     f = Foo{ x: 20 }
       |       ^
-    6 |     f = Foo{ x: 20 }
-    7 |     _ = f
-vlib/v/checker/tests/struct_assigned_to_pointer_to_struct.vv:6:4: error: mismatched types `&Foo` and `Foo`
-    4 |     mut f := &Foo{ 10 }
-    5 |     f = { x: 223344 }
-    6 |     f = Foo{ x: 20 }
-      |       ^
-    7 |     _ = f
-    8 | }
+    6 |     _ = f
+    7 | }
\ No newline at end of file
diff --git a/vlib/v/checker/tests/struct_assigned_to_pointer_to_struct.vv b/vlib/v/checker/tests/struct_assigned_to_pointer_to_struct.vv
index f281856e92..5e963492f9 100644
--- a/vlib/v/checker/tests/struct_assigned_to_pointer_to_struct.vv
+++ b/vlib/v/checker/tests/struct_assigned_to_pointer_to_struct.vv
@@ -2,7 +2,6 @@ struct Foo { x int }
 
 fn main() {
 	mut f := &Foo{ 10 }
-	f = { x: 223344 }
 	f = Foo{ x: 20 }
 	_ = f
 }
diff --git a/vlib/v/compiler_errors_test.v b/vlib/v/compiler_errors_test.v
index 13c1c9ffae..0bb0effed4 100644
--- a/vlib/v/compiler_errors_test.v
+++ b/vlib/v/compiler_errors_test.v
@@ -271,7 +271,7 @@ fn work_processor(mut work sync.Channel, mut results sync.Channel) {
 		if !work.pop(&task) {
 			break
 		}
-		sw := time.new_stopwatch({})
+		sw := time.new_stopwatch()
 		task.execute()
 		task.took = sw.elapsed()
 		results.push(&task)
diff --git a/vlib/v/fmt/attrs.v b/vlib/v/fmt/attrs.v
index 4efafb872c..798cbb2d42 100644
--- a/vlib/v/fmt/attrs.v
+++ b/vlib/v/fmt/attrs.v
@@ -11,7 +11,7 @@ pub fn (mut f Fmt) attrs(attrs []ast.Attr) {
 	sorted_attrs.sort(a.arg.len > b.arg.len)
 	for i, attr in sorted_attrs {
 		if attr.arg.len == 0 {
-			f.single_line_attrs(sorted_attrs[i..], {})
+			f.single_line_attrs(sorted_attrs[i..])
 			break
 		}
 		f.writeln('[$attr]')
diff --git a/vlib/v/fmt/comments.v b/vlib/v/fmt/comments.v
index 580eccf3b4..8c557943fa 100644
--- a/vlib/v/fmt/comments.v
+++ b/vlib/v/fmt/comments.v
@@ -53,7 +53,7 @@ pub fn (mut f Fmt) comment(node ast.Comment, options CommentsOptions) {
 			out_s += s
 		}
 		if !is_separate_line && f.indent > 0 {
-			f.remove_new_line({}) // delete the generated \n
+			f.remove_new_line() // delete the generated \n
 			f.write(' ')
 		}
 		f.write(out_s)
@@ -73,7 +73,7 @@ pub fn (mut f Fmt) comment(node ast.Comment, options CommentsOptions) {
 		if end_break {
 			f.empty_line = true
 		} else {
-			f.remove_new_line({})
+			f.remove_new_line()
 		}
 		f.write('*/')
 	}
diff --git a/vlib/v/fmt/fmt.v b/vlib/v/fmt/fmt.v
index f9d98a1d52..c72a2ae721 100644
--- a/vlib/v/fmt/fmt.v
+++ b/vlib/v/fmt/fmt.v
@@ -267,7 +267,7 @@ pub fn (mut f Fmt) imports(imports []ast.Import) {
 		already_imported[import_text] = true
 		f.out_imports.writeln(import_text)
 		f.import_comments(imp.comments, inline: true)
-		f.import_comments(imp.next_comments, {})
+		f.import_comments(imp.next_comments)
 		num_imports++
 	}
 	if num_imports > 0 {
@@ -855,7 +855,7 @@ pub fn (mut f Fmt) assert_stmt(node ast.AssertStmt) {
 }
 
 pub fn (mut f Fmt) assign_stmt(node ast.AssignStmt) {
-	f.comments(node.comments, {})
+	f.comments(node.comments)
 	for i, left in node.left {
 		f.expr(left)
 		if i < node.left.len - 1 {
@@ -989,7 +989,7 @@ pub fn (mut f Fmt) defer_stmt(node ast.DeferStmt) {
 }
 
 pub fn (mut f Fmt) expr_stmt(node ast.ExprStmt) {
-	f.comments(node.comments, {})
+	f.comments(node.comments)
 	f.expr(node.expr)
 	if !f.single_line_if {
 		f.writeln('')
@@ -1060,7 +1060,7 @@ pub fn (mut f Fmt) for_c_stmt(node ast.ForCStmt) {
 	f.expr(node.cond)
 	f.write('; ')
 	f.stmt(node.inc)
-	f.remove_new_line({})
+	f.remove_new_line()
 	f.write(' {')
 	if node.stmts.len > 0 || node.pos.line_nr < node.pos.last_line {
 		f.writeln('')
@@ -1240,7 +1240,7 @@ pub fn (mut f Fmt) mod(mod ast.Module) {
 }
 
 pub fn (mut f Fmt) return_stmt(node ast.Return) {
-	f.comments(node.comments, {})
+	f.comments(node.comments)
 	f.write('return')
 	if node.exprs.len > 0 {
 		f.write(' ')
@@ -1643,7 +1643,7 @@ pub fn (mut f Fmt) at_expr(node ast.AtExpr) {
 
 pub fn (mut f Fmt) call_expr(node ast.CallExpr) {
 	for arg in node.args {
-		f.comments(arg.comments, {})
+		f.comments(arg.comments)
 	}
 	if node.is_method {
 		if node.name in ['map', 'filter'] {
@@ -1882,12 +1882,12 @@ pub fn (mut f Fmt) if_expr(node ast.IfExpr) {
 		for i, branch in node.branches {
 			if i == 0 {
 				// first `if`
-				f.comments(branch.comments, {})
+				f.comments(branch.comments)
 			} else {
 				// `else`, close previous branch
 				if branch.comments.len > 0 {
 					f.writeln('}')
-					f.comments(branch.comments, {})
+					f.comments(branch.comments)
 				} else {
 					f.write('} ')
 				}
@@ -2070,7 +2070,7 @@ fn (mut f Fmt) write_splitted_infix(conditions []string, penalties []int, ignore
 				continue
 			}
 			if i == 0 {
-				f.remove_new_line({})
+				f.remove_new_line()
 			}
 			f.writeln('')
 			f.indent++
@@ -2151,7 +2151,7 @@ pub fn (mut f Fmt) map_init(node ast.MapInit) {
 	}
 	f.writeln('map{')
 	f.indent++
-	f.comments(node.pre_cmnts, {})
+	f.comments(node.pre_cmnts)
 	mut max_field_len := 0
 	for key in node.keys {
 		if key.str().len > max_field_len {
@@ -2177,7 +2177,7 @@ fn (mut f Fmt) match_branch(branch ast.MatchBranch, single_line bool) {
 		for j, expr in branch.exprs {
 			estr := f.node_str(expr).trim_space()
 			if f.line_len + estr.len + 2 > fmt.max_len[5] {
-				f.remove_new_line({})
+				f.remove_new_line()
 				f.writeln('')
 			}
 			f.write(estr)
@@ -2204,7 +2204,7 @@ fn (mut f Fmt) match_branch(branch ast.MatchBranch, single_line bool) {
 		}
 		f.stmts(branch.stmts)
 		if single_line {
-			f.remove_new_line({})
+			f.remove_new_line()
 			f.writeln(' }')
 		} else {
 			f.writeln('}')
@@ -2221,7 +2221,7 @@ pub fn (mut f Fmt) match_expr(node ast.MatchExpr) {
 	}
 	f.writeln(' {')
 	f.indent++
-	f.comments(node.comments, {})
+	f.comments(node.comments)
 	mut single_line := true
 	for branch in node.branches {
 		if branch.stmts.len > 1 || branch.pos.line_nr < branch.pos.last_line {
diff --git a/vlib/v/fmt/struct.v b/vlib/v/fmt/struct.v
index 0147051724..799c4279ac 100644
--- a/vlib/v/fmt/struct.v
+++ b/vlib/v/fmt/struct.v
@@ -354,7 +354,7 @@ pub fn (mut f Fmt) struct_init(node ast.StructInit) {
 					single_line_fields = false
 					f.out.go_back_to(fields_start)
 					f.line_len = fields_start
-					f.remove_new_line({})
+					f.remove_new_line()
 					continue fields_loop
 				}
 			}
diff --git a/vlib/v/fmt/tests/fn_trailing_arg_syntax_expected.vv b/vlib/v/fmt/tests/fn_trailing_arg_syntax_expected.vv
index 83761672b3..255d5ca579 100644
--- a/vlib/v/fmt/tests/fn_trailing_arg_syntax_expected.vv
+++ b/vlib/v/fmt/tests/fn_trailing_arg_syntax_expected.vv
@@ -22,7 +22,7 @@ fn main() {
 			y: 0
 		}
 	)
-	bar2_func({}, {})
+	bar2_func({})
 	bar2_func({ x: 's' },
 		x: 's'
 	)
diff --git a/vlib/v/fmt/tests/fn_trailing_arg_syntax_input.vv b/vlib/v/fmt/tests/fn_trailing_arg_syntax_input.vv
index f1d48fe1e9..110161985a 100644
--- a/vlib/v/fmt/tests/fn_trailing_arg_syntax_input.vv
+++ b/vlib/v/fmt/tests/fn_trailing_arg_syntax_input.vv
@@ -16,7 +16,7 @@ fn main() {
 		x: 0
 		y: 0
 	})
-	bar2_func({}, {})
+	bar2_func({})
 	bar2_func({x: 's'}, {x: 's'})
 	baz_func('foo', 'bar', x: 0
 		y: 0
diff --git a/vlib/v/fmt/tests/select_keep.vv b/vlib/v/fmt/tests/select_keep.vv
index 3b44fa4328..afc27c3d6f 100644
--- a/vlib/v/fmt/tests/select_keep.vv
+++ b/vlib/v/fmt/tests/select_keep.vv
@@ -89,7 +89,7 @@ fn test_select_blocks() {
 		a: 13
 	}
 	sem.wait()
-	stopwatch := time.new_stopwatch({})
+	stopwatch := time.new_stopwatch()
 	go f1(ch1, ch2, ch3, ch4, ch5, sem)
 	sem.wait()
 	elapsed_ms := f64(stopwatch.elapsed()) / time.millisecond
diff --git a/vlib/v/gen/c/cgen.v b/vlib/v/gen/c/cgen.v
index dd525ddbc0..45ada89f10 100644
--- a/vlib/v/gen/c/cgen.v
+++ b/vlib/v/gen/c/cgen.v
@@ -6359,7 +6359,7 @@ static inline $interface_name I_${cctype}_to_Interface_${interface_name}($cctype
 					params_start_pos := g.out.len
 					mut params := method.params.clone()
 					// hack to mutate typ
-					params[0] = {
+					params[0] = ast.Param{
 						...params[0]
 						typ: params[0].typ.set_nr_muls(1)
 					}
diff --git a/vlib/v/gen/js/sourcemap/mappings.v b/vlib/v/gen/js/sourcemap/mappings.v
index 7933845d98..d7aff132ca 100644
--- a/vlib/v/gen/js/sourcemap/mappings.v
+++ b/vlib/v/gen/js/sourcemap/mappings.v
@@ -42,7 +42,7 @@ mut:
 fn new_mappings() Mappings {
 	return Mappings{
 		last: Mapping{
-			GenPosition: {
+			GenPosition: GenPosition{
 				gen_column: 0
 				gen_line: 0
 			}
diff --git a/vlib/v/live/executable/reloader.v b/vlib/v/live/executable/reloader.v
index a4cad91ddd..960f543993 100644
--- a/vlib/v/live/executable/reloader.v
+++ b/vlib/v/live/executable/reloader.v
@@ -56,7 +56,7 @@ fn elog(r &live.LiveReloadInfo, s string) {
 }
 
 fn compile_and_reload_shared_lib(mut r live.LiveReloadInfo) ?bool {
-	sw := time.new_stopwatch({})
+	sw := time.new_stopwatch()
 	new_lib_path := compile_lib(mut r) or { return error('errors while compiling $r.original') }
 	elog(r, '> compile_and_reload_shared_lib compiled: $new_lib_path')
 	load_lib(mut r, new_lib_path)
@@ -68,7 +68,7 @@ fn compile_lib(mut r live.LiveReloadInfo) ?string {
 	new_lib_path, new_lib_path_with_extension := current_shared_library_path(mut r)
 	cmd := '$r.vexe $r.vopts -o $new_lib_path $r.original'
 	elog(r, '>       compilation cmd: $cmd')
-	cwatch := time.new_stopwatch({})
+	cwatch := time.new_stopwatch()
 	recompilation_result := os.execute(cmd)
 	elog(r, 'compilation took: ${cwatch.elapsed().milliseconds()}ms')
 	if recompilation_result.exit_code != 0 {
diff --git a/vlib/v/parser/assign.v b/vlib/v/parser/assign.v
index 518dd18248..76c074ae05 100644
--- a/vlib/v/parser/assign.v
+++ b/vlib/v/parser/assign.v
@@ -128,7 +128,7 @@ fn (mut p Parser) partial_assign_stmt(left []ast.Expr, left_comments []ast.Comme
 	p.next()
 	mut comments := []ast.Comment{cap: 2 * left_comments.len + 1}
 	comments << left_comments
-	comments << p.eat_comments({})
+	comments << p.eat_comments()
 	mut right_comments := []ast.Comment{}
 	mut right := []ast.Expr{cap: left.len}
 	right, right_comments = p.expr_list()
diff --git a/vlib/v/parser/containers.v b/vlib/v/parser/containers.v
index d29f8cc63e..1b22ca854f 100644
--- a/vlib/v/parser/containers.v
+++ b/vlib/v/parser/containers.v
@@ -45,14 +45,14 @@ fn (mut p Parser) array_init() ast.ArrayInit {
 		// [1,2,3] or [const]byte
 		old_inside_array_lit := p.inside_array_lit
 		p.inside_array_lit = true
-		pre_cmnts = p.eat_comments({})
+		pre_cmnts = p.eat_comments()
 		for i := 0; p.tok.kind !in [.rsbr, .eof]; i++ {
 			exprs << p.expr(0)
-			ecmnts << p.eat_comments({})
+			ecmnts << p.eat_comments()
 			if p.tok.kind == .comma {
 				p.next()
 			}
-			ecmnts.last() << p.eat_comments({})
+			ecmnts.last() << p.eat_comments()
 		}
 		p.inside_array_lit = old_inside_array_lit
 		line_nr := p.tok.line_nr
@@ -168,7 +168,7 @@ fn (mut p Parser) map_init() ast.MapInit {
 	mut keys := []ast.Expr{}
 	mut vals := []ast.Expr{}
 	mut comments := [][]ast.Comment{}
-	pre_cmnts := p.eat_comments({})
+	pre_cmnts := p.eat_comments()
 	for p.tok.kind !in [.rcbr, .eof] {
 		key := p.expr(0)
 		keys << key
@@ -178,7 +178,7 @@ fn (mut p Parser) map_init() ast.MapInit {
 		if p.tok.kind == .comma {
 			p.next()
 		}
-		comments << p.eat_comments({})
+		comments << p.eat_comments()
 	}
 	return ast.MapInit{
 		keys: keys
diff --git a/vlib/v/parser/expr.v b/vlib/v/parser/expr.v
index 01cfcb3037..fc10e37e66 100644
--- a/vlib/v/parser/expr.v
+++ b/vlib/v/parser/expr.v
@@ -23,7 +23,7 @@ pub fn (mut p Parser) check_expr(precedence int) ?ast.Expr {
 	is_stmt_ident := p.is_stmt_ident
 	p.is_stmt_ident = false
 	if !p.pref.is_fmt {
-		p.eat_comments({})
+		p.eat_comments()
 	}
 	inside_array_lit := p.inside_array_lit
 	p.inside_array_lit = false
@@ -297,18 +297,23 @@ pub fn (mut p Parser) check_expr(precedence int) ?ast.Expr {
 			}
 		}
 		.lcbr {
+			// TODO: remove this when deprecation will be removed, vfmt should handle it for a while
 			// Map `{"age": 20}` or `{ x | foo:bar, a:10 }`
 			p.next()
 			if p.tok.kind in [.chartoken, .number, .string] {
-				// TODO deprecate
+				p.warn_with_pos("deprecated map syntax, use syntax like `map{'age': 20}`",
+					p.prev_tok.position())
 				node = p.map_init()
 			} else {
 				// it should be a struct
 				if p.tok.kind == .name && p.peek_tok.kind == .pipe {
+					// TODO: remove deprecated
 					p.warn_with_pos('use e.g. `...struct_var` instead', p.peek_tok.position())
 					node = p.assoc()
 				} else if (p.tok.kind == .name && p.peek_tok.kind == .colon)
 					|| p.tok.kind in [.rcbr, .comment, .ellipsis] {
+					p.warn_with_pos('short struct initalization is deprecated, use explicit struct name',
+						p.prev_tok.position())
 					node = p.struct_init(true) // short_syntax: true
 				} else if p.tok.kind == .name {
 					p.next()
diff --git a/vlib/v/parser/fn.v b/vlib/v/parser/fn.v
index 3ecb0ca664..b97fa4f1df 100644
--- a/vlib/v/parser/fn.v
+++ b/vlib/v/parser/fn.v
@@ -124,7 +124,7 @@ pub fn (mut p Parser) call_args() []ast.CallArg {
 		if is_mut {
 			p.next()
 		}
-		mut comments := p.eat_comments({})
+		mut comments := p.eat_comments()
 		arg_start_pos := p.tok.position()
 		mut array_decompose := false
 		if p.tok.kind == .ellipsis {
@@ -149,7 +149,7 @@ pub fn (mut p Parser) call_args() []ast.CallArg {
 			comments = []ast.Comment{}
 		}
 		pos := arg_start_pos.extend(p.prev_tok.position())
-		comments << p.eat_comments({})
+		comments << p.eat_comments()
 		args << ast.CallArg{
 			is_mut: is_mut
 			share: ast.sharetype_from_flags(is_shared, is_atomic)
diff --git a/vlib/v/parser/if_match.v b/vlib/v/parser/if_match.v
index 059a6cf7f2..f1e0fe9893 100644
--- a/vlib/v/parser/if_match.v
+++ b/vlib/v/parser/if_match.v
@@ -33,9 +33,9 @@ fn (mut p Parser) if_expr(is_comptime bool) ast.IfExpr {
 			p.tok.position()
 		}
 		if p.tok.kind == .key_else {
-			comments << p.eat_comments({})
+			comments << p.eat_comments()
 			p.check(.key_else)
-			comments << p.eat_comments({})
+			comments << p.eat_comments()
 			if p.tok.kind == .key_match {
 				p.error('cannot use `match` with `if` statements')
 				return ast.IfExpr{}
@@ -78,7 +78,7 @@ fn (mut p Parser) if_expr(is_comptime bool) ast.IfExpr {
 			p.error('cannot use `match` with `if` statements')
 			return ast.IfExpr{}
 		}
-		comments << p.eat_comments({})
+		comments << p.eat_comments()
 		mut cond := ast.empty_expr()
 		mut is_guard := false
 		// `if x := opt() {`
@@ -90,9 +90,9 @@ fn (mut p Parser) if_expr(is_comptime bool) ast.IfExpr {
 			if p.scope.known_var(var_name) {
 				p.error_with_pos('redefinition of `$var_name`', var_pos)
 			}
-			comments << p.eat_comments({})
+			comments << p.eat_comments()
 			p.check(.decl_assign)
-			comments << p.eat_comments({})
+			comments << p.eat_comments()
 			expr := p.expr(0)
 			cond = ast.IfGuardExpr{
 				var_name: var_name
@@ -110,7 +110,7 @@ fn (mut p Parser) if_expr(is_comptime bool) ast.IfExpr {
 			cond = p.expr(0)
 			p.comp_if_cond = false
 		}
-		comments << p.eat_comments({})
+		comments << p.eat_comments()
 		end_pos := p.prev_tok.position()
 		body_pos := p.tok.position()
 		p.inside_if = false
@@ -128,7 +128,7 @@ fn (mut p Parser) if_expr(is_comptime bool) ast.IfExpr {
 		if is_guard {
 			p.close_scope()
 		}
-		comments = p.eat_comments({})
+		comments = p.eat_comments()
 		if is_comptime {
 			if p.tok.kind == .key_else {
 				p.error('use `\$else` instead of `else` in compile-time `if` branches')
@@ -167,7 +167,7 @@ fn (mut p Parser) match_expr() ast.MatchExpr {
 	if !no_lcbr {
 		p.check(.lcbr)
 	}
-	comments := p.eat_comments({}) // comments before the first branch
+	comments := p.eat_comments() // comments before the first branch
 	mut branches := []ast.MatchBranch{}
 	for p.tok.kind != .eof {
 		branch_first_pos := p.tok.position()
@@ -187,7 +187,7 @@ fn (mut p Parser) match_expr() ast.MatchExpr {
 			for {
 				// Sum type match
 				parsed_type := p.parse_type()
-				ecmnts << p.eat_comments({})
+				ecmnts << p.eat_comments()
 				types << parsed_type
 				exprs << ast.TypeNode{
 					typ: parsed_type
@@ -204,7 +204,7 @@ fn (mut p Parser) match_expr() ast.MatchExpr {
 			for {
 				p.inside_match_case = true
 				expr := p.expr(0)
-				ecmnts << p.eat_comments({})
+				ecmnts << p.eat_comments()
 				p.inside_match_case = false
 				if p.tok.kind == .dotdot {
 					p.error_with_pos('match only supports inclusive (`...`) ranges, not exclusive (`..`)',
@@ -238,7 +238,7 @@ fn (mut p Parser) match_expr() ast.MatchExpr {
 		p.inside_match_body = false
 		pos := branch_first_pos.extend_with_last_line(branch_last_pos, p.prev_tok.line_nr)
 		branch_pos := branch_first_pos.extend_with_last_line(p.tok.position(), p.tok.line_nr)
-		post_comments := p.eat_comments({})
+		post_comments := p.eat_comments()
 		branches << ast.MatchBranch{
 			exprs: exprs
 			ecmnts: ecmnts
@@ -408,7 +408,7 @@ fn (mut p Parser) select_expr() ast.SelectExpr {
 			len: branch_last_pos.pos - branch_first_pos.pos + branch_last_pos.len
 			col: branch_first_pos.col
 		}
-		post_comments := p.eat_comments({})
+		post_comments := p.eat_comments()
 		pos.update_last_line(p.prev_tok.line_nr)
 		if post_comments.len > 0 {
 			pos.last_line = post_comments.last().pos.last_line
diff --git a/vlib/v/parser/parser.v b/vlib/v/parser/parser.v
index c204a55034..4928f25a17 100644
--- a/vlib/v/parser/parser.v
+++ b/vlib/v/parser/parser.v
@@ -2830,7 +2830,7 @@ fn (mut p Parser) const_decl() ast.ConstDecl {
 	mut fields := []ast.ConstField{}
 	mut comments := []ast.Comment{}
 	for {
-		comments = p.eat_comments({})
+		comments = p.eat_comments()
 		if is_block && p.tok.kind == .eof {
 			p.error('unexpected eof, expecting ´)´')
 			return ast.ConstDecl{}
@@ -2887,7 +2887,7 @@ fn (mut p Parser) return_stmt() ast.Return {
 	first_pos := p.tok.position()
 	p.next()
 	// no return
-	mut comments := p.eat_comments({})
+	mut comments := p.eat_comments()
 	if p.tok.kind == .rcbr {
 		return ast.Return{
 			comments: comments
@@ -2926,7 +2926,7 @@ fn (mut p Parser) global_decl() ast.GlobalDecl {
 	mut fields := []ast.GlobalField{}
 	mut comments := []ast.Comment{}
 	for {
-		comments = p.eat_comments({})
+		comments = p.eat_comments()
 		if is_block && p.tok.kind == .eof {
 			p.error('unexpected eof, expecting ´)´')
 			return ast.GlobalDecl{}
@@ -3005,7 +3005,7 @@ fn (mut p Parser) enum_decl() ast.EnumDecl {
 	}
 	name := p.prepend_mod(enum_name)
 	p.check(.lcbr)
-	enum_decl_comments := p.eat_comments({})
+	enum_decl_comments := p.eat_comments()
 	mut vals := []string{}
 	// mut default_exprs := []ast.Expr{}
 	mut fields := []ast.EnumField{}
@@ -3027,7 +3027,7 @@ fn (mut p Parser) enum_decl() ast.EnumDecl {
 			expr: expr
 			has_expr: has_expr
 			comments: p.eat_comments(same_line: true)
-			next_comments: p.eat_comments({})
+			next_comments: p.eat_comments()
 		}
 	}
 	p.top_level_statement_end()
@@ -3132,7 +3132,7 @@ fn (mut p Parser) type_decl() ast.TypeDecl {
 		mut type_end_pos := p.prev_tok.position()
 		type_pos = type_pos.extend(type_end_pos)
 		p.next()
-		sum_variants << {
+		sum_variants << ast.TypeNode{
 			typ: first_type
 			pos: type_pos
 		}
@@ -3144,7 +3144,7 @@ fn (mut p Parser) type_decl() ast.TypeDecl {
 			prev_tok := p.prev_tok
 			type_end_pos = prev_tok.position()
 			type_pos = type_pos.extend(type_end_pos)
-			sum_variants << {
+			sum_variants << ast.TypeNode{
 				typ: variant_type
 				pos: type_pos
 			}
diff --git a/vlib/v/parser/struct.v b/vlib/v/parser/struct.v
index 40778e1376..0471ca25e6 100644
--- a/vlib/v/parser/struct.v
+++ b/vlib/v/parser/struct.v
@@ -154,7 +154,7 @@ fn (mut p Parser) struct_decl() ast.StructDecl {
 			} else if p.tok.kind == .key_module {
 				if module_pos != -1 {
 					p.error('redefinition of `module` section')
-					return {}
+					return ast.StructDecl{}
 				}
 				p.next()
 				p.check(.colon)
@@ -181,7 +181,7 @@ fn (mut p Parser) struct_decl() ast.StructDecl {
 				// struct embedding
 				type_pos = p.tok.position()
 				typ = p.parse_type()
-				ecomments := p.eat_comments({})
+				ecomments := p.eat_comments()
 				type_pos = type_pos.extend(p.prev_tok.position())
 				if !is_on_top {
 					p.error_with_pos('struct embedding must be declared at the beginning of the struct body',
@@ -223,7 +223,7 @@ fn (mut p Parser) struct_decl() ast.StructDecl {
 				field_pos = field_start_pos.extend(type_pos)
 			}
 			// Comments after type (same line)
-			comments << p.eat_comments({})
+			comments << p.eat_comments()
 			if p.tok.kind == .lsbr {
 				// attrs are stored in `p.attrs`
 				p.attributes()
@@ -241,7 +241,7 @@ fn (mut p Parser) struct_decl() ast.StructDecl {
 						else {}
 					}
 					has_default_expr = true
-					comments << p.eat_comments({})
+					comments << p.eat_comments()
 				}
 				ast_fields << ast.StructField{
 					name: field_name
@@ -337,11 +337,10 @@ fn (mut p Parser) struct_init(short_syntax bool) ast.StructInit {
 	if !short_syntax {
 		p.check(.lcbr)
 	}
-	pre_comments := p.eat_comments({})
+	pre_comments := p.eat_comments()
 	mut fields := []ast.StructInitField{}
 	mut i := 0
 	no_keys := p.peek_tok.kind != .colon && p.tok.kind != .rcbr && p.tok.kind != .ellipsis // `Vec{a,b,c}
-	// p.warn(is_short_syntax.str())
 	saved_is_amp := p.is_amp
 	p.is_amp = false
 	mut update_expr := ast.empty_expr()
@@ -391,7 +390,7 @@ fn (mut p Parser) struct_init(short_syntax bool) ast.StructInit {
 			p.next()
 		}
 		comments << p.eat_comments(same_line: true)
-		nline_comments << p.eat_comments({})
+		nline_comments << p.eat_comments()
 		if !is_update_expr {
 			fields << ast.StructInitField{
 				name: field_name
@@ -448,7 +447,7 @@ fn (mut p Parser) interface_decl() ast.InterfaceDecl {
 	generic_types := p.parse_generic_type_list()
 	// println('interface decl $interface_name')
 	p.check(.lcbr)
-	pre_comments := p.eat_comments({})
+	pre_comments := p.eat_comments()
 	if modless_name in p.imported_symbols {
 		p.error_with_pos('cannot register interface `$interface_name`, this type was already imported',
 			name_pos)
@@ -488,7 +487,7 @@ fn (mut p Parser) interface_decl() ast.InterfaceDecl {
 			iface_pos := p.tok.position()
 			iface_name := p.tok.lit
 			iface_type := p.parse_type()
-			comments := p.eat_comments({})
+			comments := p.eat_comments()
 			ifaces << ast.InterfaceEmbedding{
 				name: iface_name
 				typ: iface_type
@@ -503,7 +502,7 @@ fn (mut p Parser) interface_decl() ast.InterfaceDecl {
 		if p.tok.kind == .key_mut {
 			if is_mut {
 				p.error_with_pos('redefinition of `mut` section', p.tok.position())
-				return {}
+				return ast.InterfaceDecl{}
 			}
 			p.next()
 			p.check(.colon)
@@ -554,7 +553,7 @@ fn (mut p Parser) interface_decl() ast.InterfaceDecl {
 				method.pos = method.pos.extend(method.return_type_pos)
 			}
 			mcomments := p.eat_comments(same_line: true)
-			mnext_comments := p.eat_comments({})
+			mnext_comments := p.eat_comments()
 			method.comments = mcomments
 			method.next_comments = mnext_comments
 			methods << method
diff --git a/vlib/v/parser/tests/anon_fn_return_type.out b/vlib/v/parser/tests/anon_fn_return_type.out
index c787e54752..fe42d51966 100644
--- a/vlib/v/parser/tests/anon_fn_return_type.out
+++ b/vlib/v/parser/tests/anon_fn_return_type.out
@@ -1,6 +1,6 @@
 vlib/v/parser/tests/anon_fn_return_type.vv:7:22: error: expected return type, not string `hi` for anonymous function
     5 | _ = fn (name string) flag.Flag
-    6 | _ = fn (name string) flag.Flag {return {}}
+    6 | _ = fn (name string) flag.Flag {return flag.Flag{}}
     7 | _ = fn (name string) "hi" + name
       |                      ~~~~
     8 |
diff --git a/vlib/v/parser/tests/anon_fn_return_type.vv b/vlib/v/parser/tests/anon_fn_return_type.vv
index 028d76e14c..fc50fa06d2 100644
--- a/vlib/v/parser/tests/anon_fn_return_type.vv
+++ b/vlib/v/parser/tests/anon_fn_return_type.vv
@@ -1,8 +1,8 @@
 import flag
 
-_ = fn (name string) 
+_ = fn (name string)
 _ = fn (name string) {}
 _ = fn (name string) flag.Flag
-_ = fn (name string) flag.Flag {return {}}
+_ = fn (name string) flag.Flag {return flag.Flag{}}
 _ = fn (name string) "hi" + name
 
diff --git a/vlib/v/parser/tests/for_in_mut_key_of_map.out b/vlib/v/parser/tests/for_in_mut_key_of_map.out
index 7c159a0338..6737a534da 100644
--- a/vlib/v/parser/tests/for_in_mut_key_of_map.out
+++ b/vlib/v/parser/tests/for_in_mut_key_of_map.out
@@ -1,6 +1,6 @@
 vlib/v/parser/tests/for_in_mut_key_of_map.vv:3:6: error: index of array or key of map cannot be mutated
     1 | fn main() {
-    2 |     mut m := {'foo': 1, 'bar': 2}
+    2 |     mut m := map{'foo': 1, 'bar': 2}
     3 |     for mut k, _ in m {
       |         ~~~
     4 |         println(k)
diff --git a/vlib/v/parser/tests/for_in_mut_key_of_map.vv b/vlib/v/parser/tests/for_in_mut_key_of_map.vv
index 22a5acade0..c8a2296983 100644
--- a/vlib/v/parser/tests/for_in_mut_key_of_map.vv
+++ b/vlib/v/parser/tests/for_in_mut_key_of_map.vv
@@ -1,5 +1,5 @@
 fn main() {
-	mut m := {'foo': 1, 'bar': 2}
+	mut m := map{'foo': 1, 'bar': 2}
 	for mut k, _ in m {
 		println(k)
 	}
diff --git a/vlib/v/parser/tests/or_default_missing.vv b/vlib/v/parser/tests/or_default_missing.vv
index d89db0d72e..ad9fa62988 100644
--- a/vlib/v/parser/tests/or_default_missing.vv
+++ b/vlib/v/parser/tests/or_default_missing.vv
@@ -7,7 +7,7 @@ fn test_array_or() {
 }
 
 fn test_map_or() {
-	m := {
+	m := map{
 		'as': 3
 		'qw': 4
 		'kl': 5
diff --git a/vlib/v/tests/match_in_fn_call_test.v b/vlib/v/tests/match_in_fn_call_test.v
index 5b478381c3..6b5f6a360e 100644
--- a/vlib/v/tests/match_in_fn_call_test.v
+++ b/vlib/v/tests/match_in_fn_call_test.v
@@ -33,10 +33,10 @@ fn f_compiles2(d Data) []Data {
 }
 
 fn test_match_in_fn_call() {
-	println(f_doesnotcompile({}))
-	assert f_doesnotcompile({}) == []Data{}
-	println(f_compiles1({}))
-	assert f_compiles1({}) == []Data{}
-	println(f_compiles2({}))
-	assert f_compiles2({}) == []Data{}
+	println(f_doesnotcompile())
+	assert f_doesnotcompile() == []Data{}
+	println(f_compiles1())
+	assert f_compiles1() == []Data{}
+	println(f_compiles2())
+	assert f_compiles2() == []Data{}
 }
diff --git a/vlib/v/tests/semaphore_timed_test.v b/vlib/v/tests/semaphore_timed_test.v
index 5cac420a4a..2307a67031 100644
--- a/vlib/v/tests/semaphore_timed_test.v
+++ b/vlib/v/tests/semaphore_timed_test.v
@@ -16,7 +16,7 @@ fn test_semaphore() {
 		unsafe { abc[0]-- }
 	}
 	// wait for the 2 coroutines to finish using the semaphore
-	stopwatch := time.new_stopwatch({})
+	stopwatch := time.new_stopwatch()
 	mut elapsed := stopwatch.elapsed()
 	if !sem.timed_wait(200 * time.millisecond) {
 		// we should come here due to timeout
diff --git a/vlib/v/tests/struct_test.v b/vlib/v/tests/struct_test.v
index 1af0a0325a..94fb957b9c 100644
--- a/vlib/v/tests/struct_test.v
+++ b/vlib/v/tests/struct_test.v
@@ -274,7 +274,7 @@ fn test_struct_literal_args() {
 		n: 10
 		def: 20
 	)
-	foo_config(10, {})
+	foo_config(10)
 	foo_config(10, n: 40)
 	foo_config(40, n: 30, def: 40)
 
diff --git a/vlib/v/token/position.v b/vlib/v/token/position.v
index fc99cfc0ef..71cbf602ed 100644
--- a/vlib/v/token/position.v
+++ b/vlib/v/token/position.v
@@ -26,7 +26,7 @@ pub fn (pos Position) extend(end Position) Position {
 }
 
 pub fn (pos Position) extend_with_last_line(end Position, last_line int) Position {
-	return {
+	return Position{
 		len: end.pos - pos.pos + end.len
 		line_nr: pos.line_nr
 		last_line: last_line - 1
diff --git a/vlib/v/util/timers.v b/vlib/v/util/timers.v
index 725891c7dc..ed9211f454 100644
--- a/vlib/v/util/timers.v
+++ b/vlib/v/util/timers.v
@@ -48,7 +48,7 @@ pub fn timing_set_should_print(should_print bool) {
 }
 
 pub fn (mut t Timers) start(name string) {
-	mut sw := t.swatches[name] or { time.new_stopwatch({}) }
+	mut sw := t.swatches[name] or { time.new_stopwatch() }
 	sw.start()
 	t.swatches[name] = sw
 }
diff --git a/vlib/x/ttf/ttf.v b/vlib/x/ttf/ttf.v
index 8f700910e9..fefa544e93 100644
--- a/vlib/x/ttf/ttf.v
+++ b/vlib/x/ttf/ttf.v
@@ -616,7 +616,7 @@ fn (mut tf TTF_File) read_offset_tables() {
 	mut i := 0
 	for i < num_tables {
 		tag := tf.get_string(4)
-		tf.tables[tag] = {
+		tf.tables[tag] = Offset_Table{
 			checksum: tf.get_u32()
 			offset: tf.get_u32()
 			length: tf.get_u32()