diff --git a/vlib/gg/gg.v b/vlib/gg/gg.v
index 59c8515baf..95c8f0ebac 100644
--- a/vlib/gg/gg.v
+++ b/vlib/gg/gg.v
@@ -121,11 +121,7 @@ fn gg_init_sokol_window(user_data voidptr) {
 	exists := $if !android { os.is_file(g.config.font_path) } $else { true }
 	if g.config.font_path != '' && exists {
 		// t := time.ticks()
-		g.ft = new_ft({
-			font_path: g.config.font_path
-			custom_bold_font_path: g.config.custom_bold_font_path
-			scale: sapp.dpi_scale()
-		}) or {
+		g.ft = new_ft(font_path: g.config.font_path, custom_bold_font_path: g.config.custom_bold_font_path, scale: sapp.dpi_scale()) or {
 			panic(err)
 		}
 		// println('FT took ${time.ticks()-t} ms')
diff --git a/vlib/v/checker/checker.v b/vlib/v/checker/checker.v
index d51a57f067..c57ff5c598 100644
--- a/vlib/v/checker/checker.v
+++ b/vlib/v/checker/checker.v
@@ -1637,9 +1637,7 @@ fn (mut c Checker) type_implements(typ table.Type, inter_typ table.Type, pos tok
 	for imethod in inter_sym.methods {
 		if method := typ_sym.find_method(imethod.name) {
 			if !imethod.is_same_method_as(method) {
-				sig := c.table.fn_signature(imethod, {
-					skip_receiver: true
-				})
+				sig := c.table.fn_signature(imethod, skip_receiver: true)
 				c.error('`$styp` incorrectly implements method `$imethod.name` of interface `$inter_sym.source_name`, expected `$sig`',
 					pos)
 				return false
diff --git a/vlib/v/fmt/fmt.v b/vlib/v/fmt/fmt.v
index 98b37a0fe1..99a646f8e0 100644
--- a/vlib/v/fmt/fmt.v
+++ b/vlib/v/fmt/fmt.v
@@ -312,21 +312,14 @@ pub fn (mut f Fmt) stmt(node ast.Stmt) {
 			}
 			name := node.name.after('.')
 			f.writeln('enum $name {')
-			f.comments(node.comments, {
-				inline: true
-				level: .indent
-			})
+			f.comments(node.comments, inline: true, level: .indent)
 			for field in node.fields {
 				f.write('\t$field.name')
 				if field.has_expr {
 					f.write(' = ')
 					f.expr(field.expr)
 				}
-				f.comments(field.comments, {
-					inline: true
-					has_nl: false
-					level: .indent
-				})
+				f.comments(field.comments, inline: true, has_nl: false, level: .indent)
 				f.writeln('')
 			}
 			f.writeln('}\n')
@@ -567,9 +560,7 @@ pub fn (mut f Fmt) type_decl(node ast.TypeDecl) {
 	}
 	if comments.len > 0 {
 		f.write(' ')
-		f.comments(comments, CommentsOptions{
-			has_nl: false
-		})
+		f.comments(comments, has_nl: false)
 	}
 	f.writeln('\n')
 }
@@ -669,9 +660,7 @@ pub fn (mut f Fmt) struct_decl(node ast.StructDecl) {
 			} else {
 				f.write(' ')
 			}
-			f.comments(comments[comm_idx..], {
-				level: .indent
-			})
+			f.comments(comments[comm_idx..], level: .indent)
 		} else {
 			f.writeln('')
 		}
@@ -685,9 +674,7 @@ pub fn (mut f Fmt) comments_after_last_field(comments []ast.Comment) {
 	for comment in comments {
 		f.indent++
 		f.empty_line = true
-		f.comment(comment, {
-			inline: true
-		})
+		f.comment(comment, inline: true)
 		f.writeln('')
 		f.indent--
 	}
@@ -703,11 +690,7 @@ pub fn (mut f Fmt) interface_decl(node ast.InterfaceDecl) {
 	for method in node.methods {
 		f.write('\t')
 		f.write(method.stringify(f.table, f.cur_mod).after('fn '))
-		f.comments(method.comments, {
-			inline: true
-			has_nl: false
-			level: .indent
-		})
+		f.comments(method.comments, inline: true, has_nl: false, level: .indent)
 		f.writeln('')
 	}
 	f.writeln('}\n')
@@ -796,13 +779,9 @@ pub fn (mut f Fmt) expr(node ast.Expr) {
 		}
 		ast.Comment {
 			if f.array_init_depth > 0 {
-				f.comment(node, {
-					iembed: true
-				})
+				f.comment(node, iembed: true)
 			} else {
-				f.comment(node, {
-					inline: true
-				})
+				f.comment(node, inline: true)
 			}
 		}
 		ast.ComptimeCall {
@@ -936,9 +915,7 @@ pub fn (mut f Fmt) expr(node ast.Expr) {
 			f.indent++
 			for branch in node.branches {
 				if branch.comment.text != '' {
-					f.comment(branch.comment, {
-						inline: true
-					})
+					f.comment(branch.comment, inline: true)
 					f.writeln('')
 				}
 				if branch.is_else {
@@ -961,9 +938,7 @@ pub fn (mut f Fmt) expr(node ast.Expr) {
 				}
 				f.writeln('}')
 				if branch.post_comments.len > 0 {
-					f.comments(branch.post_comments, {
-						inline: true
-					})
+					f.comments(branch.post_comments, inline: true)
 				}
 			}
 			f.indent--
@@ -1433,9 +1408,7 @@ pub fn (mut f Fmt) if_expr(it ast.IfExpr) {
 	f.single_line_if = false
 	if it.post_comments.len > 0 {
 		f.writeln('')
-		f.comments(it.post_comments, {
-			has_nl: false
-		})
+		f.comments(it.post_comments, has_nl: false)
 	}
 }
 
@@ -1444,15 +1417,14 @@ pub fn (mut f Fmt) at_expr(node ast.AtExpr) {
 }
 
 pub fn (mut f Fmt) call_expr(node ast.CallExpr) {
-	/*
-	if node.args.len == 1 && node.expected_arg_types.len == 1 && node.args[0].expr is ast.StructInit &&
-		node.args[0].typ == node.expected_arg_types[0] {
-		// struct_init := node.args[0].expr as ast.StructInit
-		// if struct_init.typ == node.args[0].typ {
-		f.use_short_fn_args = true
-		// }
+	old_short_arg_state := f.use_short_fn_args
+	f.use_short_fn_args = false
+	if node.args.len > 0 && node.args.last().expr is ast.StructInit {
+		struct_typ := (node.args.last().expr as ast.StructInit).typ
+		if struct_typ == table.void_type {
+			f.use_short_fn_args = true
+		}
 	}
-	*/
 	for arg in node.args {
 		f.comments(arg.comments, {})
 	}
@@ -1528,7 +1500,7 @@ pub fn (mut f Fmt) call_expr(node ast.CallExpr) {
 		f.write(')')
 		f.or_expr(node.or_block)
 	}
-	f.use_short_fn_args = false
+	f.use_short_fn_args = old_short_arg_state
 }
 
 pub fn (mut f Fmt) match_expr(it ast.MatchExpr) {
@@ -1555,9 +1527,7 @@ pub fn (mut f Fmt) match_expr(it ast.MatchExpr) {
 	}
 	for branch in it.branches {
 		for cmnt in branch.comments {
-			f.comment(cmnt, {
-				inline: true
-			})
+			f.comment(cmnt, inline: true)
 			f.writeln('')
 		}
 		if !branch.is_else {
@@ -1568,9 +1538,7 @@ pub fn (mut f Fmt) match_expr(it ast.MatchExpr) {
 				if j < branch.ecmnts.len && branch.ecmnts[j].len > 0 {
 					f.write(' ')
 					for cmnt in branch.ecmnts[j] {
-						f.comment(cmnt, {
-							iembed: true
-						})
+						f.comment(cmnt, iembed: true)
 					}
 				}
 				if j < branch.exprs.len - 1 {
@@ -1599,9 +1567,7 @@ pub fn (mut f Fmt) match_expr(it ast.MatchExpr) {
 			}
 		}
 		if branch.post_comments.len > 0 {
-			f.comments(branch.post_comments, {
-				inline: true
-			})
+			f.comments(branch.post_comments, inline: true)
 		}
 	}
 	f.indent--
@@ -1778,9 +1744,7 @@ pub fn (mut f Fmt) array_init(it ast.ArrayInit) {
 		if i < it.ecmnts.len && it.ecmnts[i].len > 0 {
 			f.write(' ')
 			for cmt in it.ecmnts[i] {
-				f.comment(cmt, {
-					iembed: true
-				})
+				f.comment(cmt, iembed: true)
 			}
 		}
 		if i == it.exprs.len - 1 {
@@ -1844,29 +1808,31 @@ pub fn (mut f Fmt) struct_init(it ast.StructInit) {
 		}
 		f.write('}')
 	} else {
-		if f.use_short_fn_args {
-			f.writeln('')
-		} else {
+		use_short_args := f.use_short_fn_args
+		f.use_short_fn_args = false
+		if !use_short_args {
 			f.writeln('$name{')
 		}
-		f.comments(it.pre_comments, {
-			inline: true
-			has_nl: true
-			level: .indent
-		})
+		f.comments(it.pre_comments, inline: true, has_nl: true, level: .indent)
 		f.indent++
-		for field in it.fields {
-			f.write('$field.name: ')
-			f.prefix_expr_cast_expr(field.expr)
-			f.comments(field.comments, {
-				inline: true
-				has_nl: false
-				level: .indent
-			})
+		single_line_short_args := use_short_args && it.fields.len < 4
+		if use_short_args && !single_line_short_args {
 			f.writeln('')
 		}
+		for i, field in it.fields {
+			f.write('$field.name: ')
+			f.prefix_expr_cast_expr(field.expr)
+			f.comments(field.comments, inline: true, has_nl: false, level: .indent)
+			if single_line_short_args {
+				if i < it.fields.len - 1 {
+					f.write(', ')
+				}
+			} else {
+				f.writeln('')
+			}
+		}
 		f.indent--
-		if !f.use_short_fn_args {
+		if !use_short_args {
 			f.write('}')
 		}
 	}
@@ -1888,9 +1854,7 @@ pub fn (mut f Fmt) const_decl(it ast.ConstDecl) {
 		comments := field.comments
 		mut j := 0
 		for j < comments.len && comments[j].pos.pos < field.pos.pos {
-			f.comment(comments[j], {
-				inline: true
-			})
+			f.comment(comments[j], inline: true)
 			f.writeln('')
 			j++
 		}
@@ -1928,9 +1892,7 @@ fn (mut f Fmt) global_decl(it ast.GlobalDecl) {
 	for field in it.fields {
 		comments := field.comments
 		for comment in comments {
-			f.comment(comment, {
-				inline: true
-			})
+			f.comment(comment, inline: true)
 			f.writeln('')
 		}
 		f.write('$field.name ')
diff --git a/vlib/v/fmt/fmt_keep_test.v b/vlib/v/fmt/fmt_keep_test.v
index 9ecbc8279d..435e90e8ab 100644
--- a/vlib/v/fmt/fmt_keep_test.v
+++ b/vlib/v/fmt/fmt_keep_test.v
@@ -35,9 +35,7 @@ fn test_fmt() {
 	mut input_files := []string{}
 	input_files << keep_input_files
 	input_files << expected_input_files
-	input_files = vtest.filter_vtest_only(input_files, {
-		basepath: vroot
-	})
+	input_files = vtest.filter_vtest_only(input_files, basepath: vroot)
 	fmt_bench.set_total_expected_steps(input_files.len)
 	for istep, ipath in input_files {
 		fmt_bench.cstep = istep
diff --git a/vlib/v/fmt/tests/fn_trailing_arg_syntax_keep.vv b/vlib/v/fmt/tests/fn_trailing_arg_syntax_keep.vv
new file mode 100644
index 0000000000..7bd9594724
--- /dev/null
+++ b/vlib/v/fmt/tests/fn_trailing_arg_syntax_keep.vv
@@ -0,0 +1,32 @@
+type Foo = Bar | Baz
+
+struct Bar {
+	x string
+	y int
+	z int
+	a int
+}
+
+struct Baz {
+	x string
+}
+
+fn main() {
+	bar_func(x: 'bar', y: 13, z: 42)
+	foo_func(Baz{
+		x: 'Baz as Foo sumtype'
+	})
+	bar_func(
+		x: 'bar'
+		y: 2
+		z: 3
+		a: 4
+	)
+	func_from_other_file(val: 'something')
+}
+
+fn bar_func(bar Bar) {
+}
+
+fn foo_func(f Foo) {
+}
diff --git a/vlib/v/gen/cgen.v b/vlib/v/gen/cgen.v
index 400cd93e37..ecebdd9597 100644
--- a/vlib/v/gen/cgen.v
+++ b/vlib/v/gen/cgen.v
@@ -4841,10 +4841,7 @@ fn (mut g Gen) gen_array_sort(node ast.CallExpr) {
 				compare_fn += '_reverse'
 			}
 			// Register a new custom `compare_xxx` function for qsort()
-			g.table.register_fn({
-				name: compare_fn
-				return_type: table.int_type
-			})
+			g.table.register_fn(name: compare_fn, return_type: table.int_type)
 			infix_expr := node.args[0].expr as ast.InfixExpr
 			styp := g.typ(typ)
 			// Variables `a` and `b` are used in the `.sort(a < b)` syntax, so we can reuse them
diff --git a/vlib/v/parser/struct.v b/vlib/v/parser/struct.v
index 4d245503cd..33dfbdc62b 100644
--- a/vlib/v/parser/struct.v
+++ b/vlib/v/parser/struct.v
@@ -377,7 +377,7 @@ fn (mut p Parser) interface_decl() ast.InterfaceDecl {
 	p.check(.lcbr)
 	pre_comments := p.eat_comments()
 	// Declare the type
-	reg_idx := p.table.register_type_symbol(table.TypeSymbol{
+	reg_idx := p.table.register_type_symbol(
 		kind: .interface_
 		name: interface_name
 		source_name: interface_name
@@ -386,7 +386,7 @@ fn (mut p Parser) interface_decl() ast.InterfaceDecl {
 		info: table.Interface{
 			types: []
 		}
-	})
+	)
 	if reg_idx == -1 {
 		p.error_with_pos('cannot register interface `$interface_name`, another type with this name exists',
 			name_pos)
@@ -434,13 +434,13 @@ fn (mut p Parser) interface_decl() ast.InterfaceDecl {
 		methods << method
 		// println('register method $name')
 		return_type_sym := p.table.get_type_symbol(method.return_type)
-		ts.register_method(table.Fn{
+		ts.register_method(
 			name: name
 			params: args
 			return_type: method.return_type
 			return_type_source_name: return_type_sym.source_name
 			is_pub: true
-		})
+		)
 	}
 	p.top_level_statement_end()
 	p.check(.rcbr)
diff --git a/vlib/v/table/table.v b/vlib/v/table/table.v
index 321710db2b..03cf5129a8 100644
--- a/vlib/v/table/table.v
+++ b/vlib/v/table/table.v
@@ -619,7 +619,7 @@ pub fn (mut t Table) find_or_register_fn_type(mod string, f Fn, is_anon bool, ha
 	name := if f.name.len == 0 { 'anon_fn_$f.signature()' } else { f.name.clone() }
 	source_name := if f.name.len == 0 { 'fn $f.source_signature()' } else { f.name.clone() }
 	anon := f.name.len == 0 || is_anon
-	return t.register_type_symbol(TypeSymbol{
+	return t.register_type_symbol(
 		kind: .function
 		name: name
 		source_name: source_name
@@ -630,7 +630,7 @@ pub fn (mut t Table) find_or_register_fn_type(mod string, f Fn, is_anon bool, ha
 			has_decl: has_decl
 			func: f
 		}
-	})
+	)
 }
 
 pub fn (mut t Table) add_placeholder_type(name string, language Language) int {
diff --git a/vlib/v/table/types.v b/vlib/v/table/types.v
index 82961c22b9..e1c15d2479 100644
--- a/vlib/v/table/types.v
+++ b/vlib/v/table/types.v
@@ -498,218 +498,215 @@ pub fn (t TypeSymbol) str() string {
 pub fn (mut t Table) register_builtin_type_symbols() {
 	// reserve index 0 so nothing can go there
 	// save index check, 0 will mean not found
-	t.register_type_symbol({
-		kind: .placeholder
-		name: 'reserved_0'
-	})
-	t.register_type_symbol(TypeSymbol{
+	t.register_type_symbol(kind: .placeholder, name: 'reserved_0')
+	t.register_type_symbol(
 		kind: .void
 		name: 'void'
 		source_name: 'void'
 		cname: 'void'
 		mod: 'builtin'
-	})
-	t.register_type_symbol({
+	)
+	t.register_type_symbol(
 		kind: .voidptr
 		name: 'voidptr'
 		source_name: 'voidptr'
 		cname: 'voidptr'
 		mod: 'builtin'
-	})
-	t.register_type_symbol({
+	)
+	t.register_type_symbol(
 		kind: .byteptr
 		name: 'byteptr'
 		source_name: 'byteptr'
 		cname: 'byteptr'
 		mod: 'builtin'
-	})
-	t.register_type_symbol({
+	)
+	t.register_type_symbol(
 		kind: .charptr
 		name: 'charptr'
 		source_name: 'charptr'
 		cname: 'charptr'
 		mod: 'builtin'
-	})
-	t.register_type_symbol({
+	)
+	t.register_type_symbol(
 		kind: .i8
 		name: 'i8'
 		source_name: 'i8'
 		cname: 'i8'
 		mod: 'builtin'
-	})
-	t.register_type_symbol({
+	)
+	t.register_type_symbol(
 		kind: .i16
 		name: 'i16'
 		source_name: 'i16'
 		cname: 'i16'
 		mod: 'builtin'
-	})
-	t.register_type_symbol({
+	)
+	t.register_type_symbol(
 		kind: .int
 		name: 'int'
 		source_name: 'int'
 		cname: 'int'
 		mod: 'builtin'
-	})
-	t.register_type_symbol({
+	)
+	t.register_type_symbol(
 		kind: .i64
 		name: 'i64'
 		source_name: 'i64'
 		cname: 'i64'
 		mod: 'builtin'
-	})
-	t.register_type_symbol({
+	)
+	t.register_type_symbol(
 		kind: .byte
 		name: 'byte'
 		source_name: 'byte'
 		cname: 'byte'
 		mod: 'builtin'
-	})
-	t.register_type_symbol({
+	)
+	t.register_type_symbol(
 		kind: .u16
 		name: 'u16'
 		source_name: 'u16'
 		cname: 'u16'
 		mod: 'builtin'
-	})
-	t.register_type_symbol({
+	)
+	t.register_type_symbol(
 		kind: .u32
 		name: 'u32'
 		source_name: 'u32'
 		cname: 'u32'
 		mod: 'builtin'
-	})
-	t.register_type_symbol({
+	)
+	t.register_type_symbol(
 		kind: .u64
 		name: 'u64'
 		source_name: 'u64'
 		cname: 'u64'
 		mod: 'builtin'
-	})
-	t.register_type_symbol({
+	)
+	t.register_type_symbol(
 		kind: .f32
 		name: 'f32'
 		source_name: 'f32'
 		cname: 'f32'
 		mod: 'builtin'
-	})
-	t.register_type_symbol({
+	)
+	t.register_type_symbol(
 		kind: .f64
 		name: 'f64'
 		source_name: 'f64'
 		cname: 'f64'
 		mod: 'builtin'
-	})
-	t.register_type_symbol({
+	)
+	t.register_type_symbol(
 		kind: .char
 		name: 'char'
 		source_name: 'char'
 		cname: 'char'
 		mod: 'builtin'
-	})
-	t.register_type_symbol({
+	)
+	t.register_type_symbol(
 		kind: .bool
 		name: 'bool'
 		cname: 'bool'
 		source_name: 'bool'
 		mod: 'builtin'
-	})
-	t.register_type_symbol({
+	)
+	t.register_type_symbol(
 		kind: .none_
 		name: 'none'
 		source_name: 'none'
 		cname: 'none'
 		mod: 'builtin'
-	})
-	t.register_type_symbol({
+	)
+	t.register_type_symbol(
 		kind: .string
 		name: 'string'
 		source_name: 'string'
 		cname: 'string'
 		mod: 'builtin'
-	})
-	t.register_type_symbol({
+	)
+	t.register_type_symbol(
 		kind: .ustring
 		name: 'ustring'
 		source_name: 'ustring'
 		cname: 'ustring'
 		mod: 'builtin'
-	})
-	t.register_type_symbol({
+	)
+	t.register_type_symbol(
 		kind: .array
 		name: 'array'
 		source_name: 'array'
 		cname: 'array'
 		mod: 'builtin'
-	})
-	t.register_type_symbol({
+	)
+	t.register_type_symbol(
 		kind: .map
 		name: 'map'
 		source_name: 'map'
 		cname: 'map'
 		mod: 'builtin'
-	})
-	t.register_type_symbol({
+	)
+	t.register_type_symbol(
 		kind: .chan
 		name: 'chan'
 		source_name: 'chan'
 		cname: 'chan'
 		mod: 'builtin'
-	})
-	t.register_type_symbol({
+	)
+	t.register_type_symbol(
 		kind: .size_t
 		name: 'size_t'
 		source_name: 'size_t'
 		cname: 'size_t'
 		mod: 'builtin'
-	})
-	t.register_type_symbol({
+	)
+	t.register_type_symbol(
 		kind: .rune
 		name: 'rune'
 		source_name: 'rune'
 		cname: 'rune'
 		mod: 'builtin'
-	})
-	t.register_type_symbol({
+	)
+	t.register_type_symbol(
 		kind: .any
 		name: 'any'
 		source_name: 'any'
 		cname: 'any'
 		mod: 'builtin'
-	})
-	t.register_type_symbol({
+	)
+	t.register_type_symbol(
 		kind: .any_float
 		name: 'any_float'
 		source_name: 'any_float'
 		cname: 'any_float'
 		mod: 'builtin'
-	})
-	t.register_type_symbol({
+	)
+	t.register_type_symbol(
 		kind: .any_int
 		name: 'any_int'
 		source_name: 'any_int'
 		cname: 'any_int'
 		mod: 'builtin'
-	})
+	)
 	// TODO: remove. for v1 map compatibility
 	map_string_string_idx := t.find_or_register_map(string_type, string_type)
 	map_string_int_idx := t.find_or_register_map(string_type, int_type)
-	t.register_type_symbol({
+	t.register_type_symbol(
 		kind: .alias
 		name: 'map_string'
 		source_name: 'map_string'
 		cname: 'map_string'
 		mod: 'builtin'
 		parent_idx: map_string_string_idx
-	})
-	t.register_type_symbol({
+	)
+	t.register_type_symbol(
 		kind: .alias
 		name: 'map_int'
 		source_name: 'map_int'
 		cname: 'map_int'
 		mod: 'builtin'
 		parent_idx: map_string_int_idx
-	})
+	)
 }
 
 [inline]
@@ -929,9 +926,7 @@ pub fn (table &Table) type_to_str(t Type) string {
 		.function {
 			if !table.is_fmt {
 				info := sym.info as FnType
-				res = table.fn_signature(info.func, {
-					type_only: true
-				})
+				res = table.fn_signature(info.func, type_only: true)
 			}
 		}
 		.map {
diff --git a/vlib/v/vet/vet_test.v b/vlib/v/vet/vet_test.v
index bb4d4018df..06ccbefbbb 100644
--- a/vlib/v/vet/vet_test.v
+++ b/vlib/v/vet/vet_test.v
@@ -23,9 +23,7 @@ fn get_tests_in_dir(dir string) []string {
 
 fn check_path(vexe string, dir string, tests []string) int {
 	mut nb_fail := 0
-	paths := vtest.filter_vtest_only(tests, {
-		basepath: dir
-	})
+	paths := vtest.filter_vtest_only(tests, basepath: dir)
 	for path in paths {
 		program := path
 		print(path + ' ')
diff --git a/vlib/v/vmod/vmod.v b/vlib/v/vmod/vmod.v
index 242631786b..7e835d4c69 100644
--- a/vlib/v/vmod/vmod.v
+++ b/vlib/v/vmod/vmod.v
@@ -130,10 +130,7 @@ fn (mut mcache ModFileCacher) mark_folders_as_vmod_free(folders_so_far []string)
 	// No need to check these folders anymore,
 	// because their parents do not contain v.mod files
 	for f in folders_so_far {
-		mcache.add(f, ModFileAndFolder{
-			vmod_file: ''
-			vmod_folder: f
-		})
+		mcache.add(f, vmod_file: '', vmod_folder: f)
 	}
 }