Merge pull request #2597 from odin-lang/ordered-named-arguments

Allowing for Positional and Named Arguments in Procedure Calls

core/c/frontend/preprocessor/preprocess.odin

@@ -1118,7 +1118,7 @@ expand_macro :: proc(cpp: ^Preprocessor, rest: ^^Token, tok: ^Token) -> bool {
 
 search_include_next :: proc(cpp: ^Preprocessor, filename: string) -> (path: string, ok: bool) {
 	for ; cpp.include_next_index < len(cpp.include_paths); cpp.include_next_index += 1 {
-		tpath := filepath.join(elems={cpp.include_paths[cpp.include_next_index], filename}, allocator=context.temp_allocator)
+		tpath := filepath.join({cpp.include_paths[cpp.include_next_index], filename}, allocator=context.temp_allocator)
 		if os.exists(tpath) {
 			return strings.clone(tpath), true
 		}
@@ -1136,7 +1136,7 @@ search_include_paths :: proc(cpp: ^Preprocessor, filename: string) -> (path: str
 	}
 
 	for include_path in cpp.include_paths {
-		tpath := filepath.join(elems={include_path, filename}, allocator=context.temp_allocator)
+		tpath := filepath.join({include_path, filename}, allocator=context.temp_allocator)
 		if os.exists(tpath) {
 			path, ok = strings.clone(tpath), true
 			cpp.filepath_cache[filename] = path

core/compress/gzip/gzip.odin

@@ -335,7 +335,7 @@ load_from_context :: proc(z: ^$C, buf: ^bytes.Buffer, known_gzip_size := -1, exp
 
 	// fmt.printf("GZIP: Expected Payload Size: %v\n", expected_output_size);
 
-	zlib_error := zlib.inflate_raw(z=z, expected_output_size=expected_output_size)
+	zlib_error := zlib.inflate_raw(z, expected_output_size=expected_output_size)
 	if zlib_error != nil {
 		return zlib_error
 	}

core/compress/zlib/zlib.odin

@@ -471,7 +471,7 @@ inflate_from_context :: proc(using ctx: ^compress.Context_Memory_Input, raw := f
 	}
 
 	// Parse ZLIB stream without header.
-	inflate_raw(z=ctx, expected_output_size=expected_output_size) or_return
+	inflate_raw(ctx, expected_output_size=expected_output_size) or_return
 
 	if !raw {
 		compress.discard_to_next_byte_lsb(ctx)
@@ -665,7 +665,7 @@ inflate_from_byte_array :: proc(input: []u8, buf: ^bytes.Buffer, raw := false, e
 	ctx.input_data = input
 	ctx.output = buf
 
-	return inflate_from_context(ctx=&ctx, raw=raw, expected_output_size=expected_output_size)
+	return inflate_from_context(&ctx, raw=raw, expected_output_size=expected_output_size)
 }
 
 inflate_from_byte_array_raw :: proc(input: []u8, buf: ^bytes.Buffer, raw := false, expected_output_size := -1) -> (err: Error) {
@@ -674,7 +674,7 @@ inflate_from_byte_array_raw :: proc(input: []u8, buf: ^bytes.Buffer, raw := fals
 	ctx.input_data = input
 	ctx.output = buf
 
-	return inflate_raw(z=&ctx, expected_output_size=expected_output_size)
+	return inflate_raw(&ctx, expected_output_size=expected_output_size)
 }
 
 inflate :: proc{inflate_from_context, inflate_from_byte_array}

core/fmt/fmt.odin

@@ -123,7 +123,7 @@ register_user_formatter :: proc(id: typeid, formatter: User_Formatter) -> Regist
 aprint :: proc(args: ..any, sep := " ") -> string {
 	str: strings.Builder
 	strings.builder_init(&str)
-	sbprint(buf=&str, args=args, sep=sep)
+	sbprint(&str, ..args, sep=sep)
 	return strings.to_string(str)
 }
 // 	Creates a formatted string with a newline character at the end
@@ -139,7 +139,7 @@ aprint :: proc(args: ..any, sep := " ") -> string {
 aprintln :: proc(args: ..any, sep := " ") -> string {
 	str: strings.Builder
 	strings.builder_init(&str)
-	sbprintln(buf=&str, args=args, sep=sep)
+	sbprintln(&str, ..args, sep=sep)
 	return strings.to_string(str)
 }
 // 	Creates a formatted string using a format string and arguments
@@ -171,7 +171,7 @@ aprintf :: proc(fmt: string, args: ..any) -> string {
 tprint :: proc(args: ..any, sep := " ") -> string {
 	str: strings.Builder
 	strings.builder_init(&str, context.temp_allocator)
-	sbprint(buf=&str, args=args, sep=sep)
+	sbprint(&str, ..args, sep=sep)
 	return strings.to_string(str)
 }
 // 	Creates a formatted string with a newline character at the end
@@ -187,7 +187,7 @@ tprint :: proc(args: ..any, sep := " ") -> string {
 tprintln :: proc(args: ..any, sep := " ") -> string {
 	str: strings.Builder
 	strings.builder_init(&str, context.temp_allocator)
-	sbprintln(buf=&str, args=args, sep=sep)
+	sbprintln(&str, ..args, sep=sep)
 	return strings.to_string(str)
 }
 // 	Creates a formatted string using a format string and arguments
@@ -217,7 +217,7 @@ tprintf :: proc(fmt: string, args: ..any) -> string {
 //
 bprint :: proc(buf: []byte, args: ..any, sep := " ") -> string {
 	sb := strings.builder_from_bytes(buf[0:len(buf)])
-	return sbprint(buf=&sb, args=args, sep=sep)
+	return sbprint(&sb, ..args, sep=sep)
 }
 // Creates a formatted string using a supplied buffer as the backing array, appends newline. Writes into the buffer.
 //
@@ -230,7 +230,7 @@ bprint :: proc(buf: []byte, args: ..any, sep := " ") -> string {
 //
 bprintln :: proc(buf: []byte, args: ..any, sep := " ") -> string {
 	sb := strings.builder_from_bytes(buf[0:len(buf)])
-	return sbprintln(buf=&sb, args=args, sep=sep)
+	return sbprintln(&sb, ..args, sep=sep)
 }
 // Creates a formatted string using a supplied buffer as the backing array. Writes into the buffer.
 //
@@ -327,7 +327,7 @@ ctprintf :: proc(format: string, args: ..any) -> cstring {
 // Returns: A formatted string
 //
 sbprint :: proc(buf: ^strings.Builder, args: ..any, sep := " ") -> string {
-	wprint(w=strings.to_writer(buf), args=args, sep=sep)
+	wprint(strings.to_writer(buf), ..args, sep=sep)
 	return strings.to_string(buf^)
 }
 // Formats and writes to a strings.Builder buffer using the default print settings
@@ -340,7 +340,7 @@ sbprint :: proc(buf: ^strings.Builder, args: ..any, sep := " ") -> string {
 // Returns: The resulting formatted string
 //
 sbprintln :: proc(buf: ^strings.Builder, args: ..any, sep := " ") -> string {
-	wprintln(w=strings.to_writer(buf), args=args, sep=sep)
+	wprintln(strings.to_writer(buf), ..args, sep=sep)
 	return strings.to_string(buf^)
 }
 // Formats and writes to a strings.Builder buffer according to the specified format string
@@ -353,7 +353,7 @@ sbprintln :: proc(buf: ^strings.Builder, args: ..any, sep := " ") -> string {
 // Returns: The resulting formatted string
 //
 sbprintf :: proc(buf: ^strings.Builder, fmt: string, args: ..any) -> string {
-	wprintf(w=strings.to_writer(buf), fmt=fmt, args=args)
+	wprintf(strings.to_writer(buf), fmt, ..args)
 	return strings.to_string(buf^)
 }
 // Formats and writes to an io.Writer using the default print settings

core/fmt/fmt_os.odin

@@ -14,7 +14,7 @@ fprint :: proc(fd: os.Handle, args: ..any, sep := " ") -> int {
 
 	bufio.writer_init_with_buf(&b, {os.stream_from_handle(fd)}, buf[:])
 	w := bufio.writer_to_writer(&b)
-	return wprint(w=w, args=args, sep=sep)
+	return wprint(w, ..args, sep=sep)
 }
 
 // fprintln formats using the default print settings and writes to fd
@@ -26,7 +26,7 @@ fprintln :: proc(fd: os.Handle, args: ..any, sep := " ") -> int {
 	bufio.writer_init_with_buf(&b, {os.stream_from_handle(fd)}, buf[:])
 
 	w := bufio.writer_to_writer(&b)
-	return wprintln(w=w, args=args, sep=sep)
+	return wprintln(w, ..args, sep=sep)
 }
 // fprintf formats according to the specified format string and writes to fd
 fprintf :: proc(fd: os.Handle, fmt: string, args: ..any) -> int {
@@ -61,15 +61,15 @@ fprint_typeid :: proc(fd: os.Handle, id: typeid) -> (n: int, err: io.Error) {
 }
 
 // print formats using the default print settings and writes to os.stdout
-print   :: proc(args: ..any, sep := " ") -> int { return fprint(fd=os.stdout, args=args, sep=sep) }
+print   :: proc(args: ..any, sep := " ") -> int { return fprint(os.stdout, ..args, sep=sep) }
 // println formats using the default print settings and writes to os.stdout
-println :: proc(args: ..any, sep := " ") -> int { return fprintln(fd=os.stdout, args=args, sep=sep) }
+println :: proc(args: ..any, sep := " ") -> int { return fprintln(os.stdout, ..args, sep=sep) }
 // printf formats according to the specified format string and writes to os.stdout
 printf  :: proc(fmt: string, args: ..any) -> int { return fprintf(os.stdout, fmt, ..args) }
 
 // eprint formats using the default print settings and writes to os.stderr
-eprint   :: proc(args: ..any, sep := " ") -> int { return fprint(fd=os.stderr, args=args, sep=sep) }
+eprint   :: proc(args: ..any, sep := " ") -> int { return fprint(os.stderr, ..args, sep=sep) }
 // eprintln formats using the default print settings and writes to os.stderr
-eprintln :: proc(args: ..any, sep := " ") -> int { return fprintln(fd=os.stderr, args=args, sep=sep) }
+eprintln :: proc(args: ..any, sep := " ") -> int { return fprintln(os.stderr, ..args, sep=sep) }
 // eprintf formats according to the specified format string and writes to os.stderr
 eprintf  :: proc(fmt: string, args: ..any) -> int { return fprintf(os.stderr, fmt, ..args) }

core/image/png/helpers.odin

@@ -99,7 +99,7 @@ text :: proc(c: image.PNG_Chunk) -> (res: Text, ok: bool) {
 	case .tEXt:
 		ok = true
 
-		fields := bytes.split(s=c.data, sep=[]u8{0}, allocator=context.temp_allocator)
+		fields := bytes.split(c.data, sep=[]u8{0}, allocator=context.temp_allocator)
 		if len(fields) == 2 {
 			res.keyword = strings.clone(string(fields[0]))
 			res.text    = strings.clone(string(fields[1]))
@@ -110,7 +110,7 @@ text :: proc(c: image.PNG_Chunk) -> (res: Text, ok: bool) {
 	case .zTXt:
 		ok = true
 
-		fields := bytes.split_n(s=c.data, sep=[]u8{0}, n=3, allocator=context.temp_allocator)
+		fields := bytes.split_n(c.data, sep=[]u8{0}, n=3, allocator=context.temp_allocator)
 		if len(fields) != 3 || len(fields[1]) != 0 {
 			// Compression method must be 0=Deflate, which thanks to the split above turns
 			// into an empty slice
@@ -199,7 +199,7 @@ text_destroy :: proc(text: Text) {
 iccp :: proc(c: image.PNG_Chunk) -> (res: iCCP, ok: bool) {
 	runtime.DEFAULT_TEMP_ALLOCATOR_TEMP_GUARD(ignore = context.temp_allocator == context.allocator)
 
-	fields := bytes.split_n(s=c.data, sep=[]u8{0}, n=3, allocator=context.temp_allocator)
+	fields := bytes.split_n(c.data, sep=[]u8{0}, n=3, allocator=context.temp_allocator)
 
 	if len(fields[0]) < 1 || len(fields[0]) > 79 {
 		// Invalid profile name
@@ -263,7 +263,7 @@ splt :: proc(c: image.PNG_Chunk) -> (res: sPLT, ok: bool) {
 	}
 	runtime.DEFAULT_TEMP_ALLOCATOR_TEMP_GUARD(ignore = context.temp_allocator == context.allocator)
 
-	fields := bytes.split_n(s=c.data, sep=[]u8{0}, n=2, allocator=context.temp_allocator)
+	fields := bytes.split_n(c.data, sep=[]u8{0}, n=2, allocator=context.temp_allocator)
 	if len(fields) != 2 {
 		return
 	}

core/log/log.odin

@@ -76,43 +76,43 @@ nil_logger :: proc() -> Logger {
 }
 
 debugf :: proc(fmt_str: string, args: ..any, location := #caller_location) {
-	logf(level=.Debug,   fmt_str=fmt_str, args=args, location=location)
+	logf(.Debug,   fmt_str, ..args, location=location)
 }
 infof  :: proc(fmt_str: string, args: ..any, location := #caller_location) {
-	logf(level=.Info,    fmt_str=fmt_str, args=args, location=location)
+	logf(.Info,    fmt_str, ..args, location=location)
 }
 warnf  :: proc(fmt_str: string, args: ..any, location := #caller_location) {
-	logf(level=.Warning, fmt_str=fmt_str, args=args, location=location)
+	logf(.Warning, fmt_str, ..args, location=location)
 }
 errorf :: proc(fmt_str: string, args: ..any, location := #caller_location) {
-	logf(level=.Error,   fmt_str=fmt_str, args=args, location=location)
+	logf(.Error,   fmt_str, ..args, location=location)
 }
 fatalf :: proc(fmt_str: string, args: ..any, location := #caller_location) {
-	logf(level=.Fatal,   fmt_str=fmt_str, args=args, location=location)
+	logf(.Fatal,   fmt_str, ..args, location=location)
 }
 
 debug :: proc(args: ..any, sep := " ", location := #caller_location) {
-	log(level=.Debug,   args=args, sep=sep, location=location)
+	log(.Debug,   ..args, sep=sep, location=location)
 }
 info  :: proc(args: ..any, sep := " ", location := #caller_location) {
-	log(level=.Info,    args=args, sep=sep, location=location)
+	log(.Info,    ..args, sep=sep, location=location)
 }
 warn  :: proc(args: ..any, sep := " ", location := #caller_location) {
-	log(level=.Warning, args=args, sep=sep, location=location)
+	log(.Warning, ..args, sep=sep, location=location)
 }
 error :: proc(args: ..any, sep := " ", location := #caller_location) {
-	log(level=.Error,   args=args, sep=sep, location=location)
+	log(.Error,   ..args, sep=sep, location=location)
 }
 fatal :: proc(args: ..any, sep := " ", location := #caller_location) {
-	log(level=.Fatal,   args=args, sep=sep, location=location)
+	log(.Fatal,   ..args, sep=sep, location=location)
 }
 
 panic :: proc(args: ..any, location := #caller_location) -> ! {
-	log(level=.Fatal, args=args, location=location)
+	log(.Fatal, ..args, location=location)
 	runtime.panic("log.panic", location)
 }
 panicf :: proc(fmt_str: string, args: ..any, location := #caller_location) -> ! {
-	logf(level=.Fatal, fmt_str=fmt_str, args=args, location=location)
+	logf(.Fatal, fmt_str, ..args, location=location)
 	runtime.panic("log.panicf", location)
 }
 
@@ -127,7 +127,7 @@ log :: proc(level: Level, args: ..any, sep := " ", location := #caller_location)
 	if level < logger.lowest_level {
 		return
 	}
-	str := fmt.tprint(args=args, sep=sep) //NOTE(Hoej): While tprint isn't thread-safe, no logging is.
+	str := fmt.tprint(..args, sep=sep) //NOTE(Hoej): While tprint isn't thread-safe, no logging is.
 	logger.procedure(logger.data, level, str, logger.options, location)
 }
 

core/log/log_allocator.odin

@@ -38,60 +38,60 @@ log_allocator_proc :: proc(allocator_data: rawptr, mode: runtime.Allocator_Mode,
 		switch mode {
 		case .Alloc:
 			logf(
-				level=la.level,
+				la.level,
-				fmt_str = "%s%s>>> ALLOCATOR(mode=.Alloc, size=%d, alignment=%d)",
+				"%s%s>>> ALLOCATOR(mode=.Alloc, size=%d, alignment=%d)",
-				args = {la.prefix, padding, size, alignment},
+				la.prefix, padding, size, alignment,
 				location = location,
 			)
 		case .Alloc_Non_Zeroed:
 			logf(
-				level=la.level,
+				la.level,
-				fmt_str = "%s%s>>> ALLOCATOR(mode=.Alloc_Non_Zeroed, size=%d, alignment=%d)",
+				"%s%s>>> ALLOCATOR(mode=.Alloc_Non_Zeroed, size=%d, alignment=%d)",
-				args = {la.prefix, padding, size, alignment},
+				la.prefix, padding, size, alignment,
 				location = location,
 			)
 		case .Free:
 			if old_size != 0 {
 				logf(
-					level=la.level,
+					la.level,
-					fmt_str = "%s%s<<< ALLOCATOR(mode=.Free, ptr=%p, size=%d)",
+					"%s%s<<< ALLOCATOR(mode=.Free, ptr=%p, size=%d)",
-					args = {la.prefix, padding, old_memory, old_size},
+					la.prefix, padding, old_memory, old_size,
 					location = location,
 				)
 			} else {
 				logf(
-					level=la.level,
+					la.level,
-					fmt_str = "%s%s<<< ALLOCATOR(mode=.Free, ptr=%p)",
+					"%s%s<<< ALLOCATOR(mode=.Free, ptr=%p)",
-					args = {la.prefix, padding, old_memory},
+					la.prefix, padding, old_memory,
 					location = location,
 				)
 			}
 		case .Free_All:
 			logf(
-				level=la.level,
+				la.level,
-				fmt_str = "%s%s<<< ALLOCATOR(mode=.Free_All)",
+				"%s%s<<< ALLOCATOR(mode=.Free_All)",
-				args = {la.prefix, padding},
+				la.prefix, padding,
 				location = location,
 			)
 		case .Resize:
 			logf(
-				level=la.level,
+				la.level,
-				fmt_str = "%s%s>>> ALLOCATOR(mode=.Resize, ptr=%p, old_size=%d, size=%d, alignment=%d)",
+				"%s%s>>> ALLOCATOR(mode=.Resize, ptr=%p, old_size=%d, size=%d, alignment=%d)",
-				args = {la.prefix, padding, old_memory, old_size, size, alignment},
+				la.prefix, padding, old_memory, old_size, size, alignment,
 				location = location,
 			)
 		case .Query_Features:
 			logf(
-				level=la.level,
+				la.level,
-				fmt_str = "%s%ALLOCATOR(mode=.Query_Features)",
+				"%s%ALLOCATOR(mode=.Query_Features)",
-				args = {la.prefix, padding},
+				la.prefix, padding,
 				location = location,
 			)
 		case .Query_Info:
 			logf(
-				level=la.level,
+				la.level,
-				fmt_str = "%s%ALLOCATOR(mode=.Query_Info)",
+				"%s%ALLOCATOR(mode=.Query_Info)",
-				args = {la.prefix, padding},
+				la.prefix, padding,
 				location = location,
 			)
 		}
@@ -103,9 +103,9 @@ log_allocator_proc :: proc(allocator_data: rawptr, mode: runtime.Allocator_Mode,
 		defer la.locked = false
 		if err != nil {
 			logf(
-				level=la.level,
+				la.level,
-				fmt_str = "%s%ALLOCATOR ERROR=%v",
+				"%s%ALLOCATOR ERROR=%v",
-				args = {la.prefix, padding, error},
+				la.prefix, padding, error,
 				location = location,
 			)
 		}

core/math/big/radix.odin

@@ -429,7 +429,7 @@ internal_int_write_to_ascii_file :: proc(a: ^Int, filename: string, radix := i8(
 		len  = l,
 	}
 
-	ok := os.write_entire_file(name=filename, data=data, truncate=true)
+	ok := os.write_entire_file(filename, data, truncate=true)
 	return nil if ok else .Cannot_Write_File
 }
 

core/mem/virtual/arena.odin

@@ -120,7 +120,7 @@ arena_alloc :: proc(arena: ^Arena, size: uint, alignment: uint, loc := #caller_l
 			if arena.minimum_block_size == 0 {
 				arena.minimum_block_size = DEFAULT_ARENA_STATIC_RESERVE_SIZE
 			}
-			arena_init_static(arena=arena, reserved=arena.minimum_block_size, commit_size=DEFAULT_ARENA_STATIC_COMMIT_SIZE) or_return
+			arena_init_static(arena, reserved=arena.minimum_block_size, commit_size=DEFAULT_ARENA_STATIC_COMMIT_SIZE) or_return
 		}
 		fallthrough
 	case .Buffer:

core/runtime/core_builtin.odin

@@ -112,7 +112,7 @@ remove_range :: proc(array: ^$D/[dynamic]$T, lo, hi: int, loc := #caller_locatio
 // Note: If the dynamic array as no elements (`len(array) == 0`), this procedure will panic.
 @builtin
 pop :: proc(array: ^$T/[dynamic]$E, loc := #caller_location) -> (res: E) #no_bounds_check {
-	assert(len(array) > 0, "", loc)
+	assert(len(array) > 0, loc=loc)
 	res = array[len(array)-1]
 	(^Raw_Dynamic_Array)(array).len -= 1
 	return res
@@ -136,7 +136,7 @@ pop_safe :: proc(array: ^$T/[dynamic]$E) -> (res: E, ok: bool) #no_bounds_check
 // Note: If the dynamic array as no elements (`len(array) == 0`), this procedure will panic.
 @builtin
 pop_front :: proc(array: ^$T/[dynamic]$E, loc := #caller_location) -> (res: E) #no_bounds_check {
-	assert(len(array) > 0, "", loc)
+	assert(len(array) > 0, loc=loc)
 	res = array[0]
 	if len(array) > 1 {
 		copy(array[0:], array[1:])
@@ -424,7 +424,7 @@ append_elem :: proc(array: ^$T/[dynamic]$E, arg: E, loc := #caller_location) ->
 			a := (^Raw_Dynamic_Array)(array)
 			when size_of(E) != 0 {
 				data := ([^]E)(a.data)
-				assert(condition=data != nil, loc=loc)
+				assert(data != nil, loc=loc)
 				data[a.len] = arg
 			}
 			a.len += 1
@@ -459,7 +459,7 @@ append_elems :: proc(array: ^$T/[dynamic]$E, args: ..E, loc := #caller_location)
 			a := (^Raw_Dynamic_Array)(array)
 			when size_of(E) != 0 {
 				data := ([^]E)(a.data)
-				assert(condition=data != nil, loc=loc)
+				assert(data != nil, loc=loc)
 				intrinsics.mem_copy(&data[a.len], raw_data(args), size_of(E) * arg_len)
 			}
 			a.len += arg_len
@@ -472,7 +472,7 @@ append_elems :: proc(array: ^$T/[dynamic]$E, args: ..E, loc := #caller_location)
 @builtin
 append_elem_string :: proc(array: ^$T/[dynamic]$E/u8, arg: $A/string, loc := #caller_location) -> (n: int, err: Allocator_Error) #optional_allocator_error {
 	args := transmute([]E)arg
-	return append_elems(array=array, args=args, loc=loc)
+	return append_elems(array, ..args, loc=loc)
 }
 
 
@@ -481,7 +481,7 @@ append_elem_string :: proc(array: ^$T/[dynamic]$E/u8, arg: $A/string, loc := #ca
 append_string :: proc(array: ^$T/[dynamic]$E/u8, args: ..string, loc := #caller_location) -> (n: int, err: Allocator_Error) #optional_allocator_error {
 	n_arg: int
 	for arg in args {
-		n_arg, err = append(array = array, args = transmute([]E)(arg), loc = loc)
+		n_arg, err = append(array, ..transmute([]E)(arg), loc=loc)
 		n += n_arg
 		if err != nil {
 			return

core/runtime/error_checks.odin

@@ -22,7 +22,7 @@ bounds_check_error :: proc "contextless" (file: string, line, column: i32, index
 		return
 	}
 	@(cold)
-	handle_error :: proc "contextless" (file: string, line, column: i32, index, count: int) {
+	handle_error :: proc "contextless" (file: string, line, column: i32, index, count: int) -> ! {
 		print_caller_location(Source_Code_Location{file, line, column, ""})
 		print_string(" Index ")
 		print_i64(i64(index))
@@ -83,7 +83,7 @@ dynamic_array_expr_error :: proc "contextless" (file: string, line, column: i32,
 		return
 	}
 	@(cold)
-	handle_error :: proc "contextless" (file: string, line, column: i32, low, high, max: int) {
+	handle_error :: proc "contextless" (file: string, line, column: i32, low, high, max: int) -> ! {
 		print_caller_location(Source_Code_Location{file, line, column, ""})
 		print_string(" Invalid dynamic array indices ")
 		print_i64(i64(low))
@@ -104,7 +104,7 @@ matrix_bounds_check_error :: proc "contextless" (file: string, line, column: i32
 		return
 	}
 	@(cold)
-	handle_error :: proc "contextless" (file: string, line, column: i32, row_index, column_index, row_count, column_count: int) {
+	handle_error :: proc "contextless" (file: string, line, column: i32, row_index, column_index, row_count, column_count: int) -> ! {
 		print_caller_location(Source_Code_Location{file, line, column, ""})
 		print_string(" Matrix indices [")
 		print_i64(i64(row_index))
@@ -128,7 +128,7 @@ when ODIN_NO_RTTI {
 			return
 		}
 		@(cold)
-		handle_error :: proc "contextless" (file: string, line, column: i32) {
+		handle_error :: proc "contextless" (file: string, line, column: i32) -> ! {
 			print_caller_location(Source_Code_Location{file, line, column, ""})
 			print_string(" Invalid type assertion\n")
 			type_assertion_trap()
@@ -141,7 +141,7 @@ when ODIN_NO_RTTI {
 			return
 		}
 		@(cold)
-		handle_error :: proc "contextless" (file: string, line, column: i32) {
+		handle_error :: proc "contextless" (file: string, line, column: i32) -> ! {
 			print_caller_location(Source_Code_Location{file, line, column, ""})
 			print_string(" Invalid type assertion\n")
 			type_assertion_trap()
@@ -154,7 +154,7 @@ when ODIN_NO_RTTI {
 			return
 		}
 		@(cold)
-		handle_error :: proc "contextless" (file: string, line, column: i32, from, to: typeid) {
+		handle_error :: proc "contextless" (file: string, line, column: i32, from, to: typeid) -> ! {
 			print_caller_location(Source_Code_Location{file, line, column, ""})
 			print_string(" Invalid type assertion from ")
 			print_typeid(from)
@@ -199,7 +199,7 @@ when ODIN_NO_RTTI {
 		}
 
 		@(cold)
-		handle_error :: proc "contextless" (file: string, line, column: i32, from, to: typeid, from_data: rawptr) {
+		handle_error :: proc "contextless" (file: string, line, column: i32, from, to: typeid, from_data: rawptr) -> ! {
 
 			actual := variant_type(from, from_data)
 
@@ -225,7 +225,7 @@ make_slice_error_loc :: #force_inline proc "contextless" (loc := #caller_locatio
 		return
 	}
 	@(cold)
-	handle_error :: proc "contextless" (loc: Source_Code_Location, len: int) {
+	handle_error :: proc "contextless" (loc: Source_Code_Location, len: int) -> ! {
 		print_caller_location(loc)
 		print_string(" Invalid slice length for make: ")
 		print_i64(i64(len))
@@ -240,7 +240,7 @@ make_dynamic_array_error_loc :: #force_inline proc "contextless" (using loc := #
 		return
 	}
 	@(cold)
-	handle_error :: proc "contextless" (loc: Source_Code_Location, len, cap: int) {
+	handle_error :: proc "contextless" (loc: Source_Code_Location, len, cap: int)  -> ! {
 		print_caller_location(loc)
 		print_string(" Invalid dynamic array parameters for make: ")
 		print_i64(i64(len))
@@ -257,7 +257,7 @@ make_map_expr_error_loc :: #force_inline proc "contextless" (loc := #caller_loca
 		return
 	}
 	@(cold)
-	handle_error :: proc "contextless" (loc: Source_Code_Location, cap: int) {
+	handle_error :: proc "contextless" (loc: Source_Code_Location, cap: int)  -> ! {
 		print_caller_location(loc)
 		print_string(" Invalid map capacity for make: ")
 		print_i64(i64(cap))

core/testing/runner_windows.odin

@@ -191,7 +191,7 @@ run_internal_test :: proc(t: ^T, it: Internal_Test) {
 		global_exception_handler = win32.AddVectoredExceptionHandler(0, exception_handler_proc)
 		
 		context.assertion_failure_proc = proc(prefix, message: string, loc: runtime.Source_Code_Location) -> ! {
-			errorf(t=global_current_t, format="%s %s", args={prefix, message}, loc=loc)
+			errorf(global_current_t, "%s %s", prefix, message, loc=loc)
 			intrinsics.trap()
 		}
 		

core/testing/testing.odin

@@ -46,15 +46,15 @@ errorf :: proc(t: ^T, format: string, args: ..any, loc := #caller_location) {
 }
 
 fail :: proc(t: ^T, loc := #caller_location) {
-	error(t=t, args={"FAIL"}, loc=loc)
+	error(t, "FAIL", loc=loc)
 	t.error_count += 1
 }
 
 fail_now :: proc(t: ^T, msg := "", loc := #caller_location) {
 	if msg != "" {
-		error(t=t, args={"FAIL:", msg}, loc=loc)
+		error(t, "FAIL:", msg, loc=loc)
 	} else {
-		error(t=t, args={"FAIL"}, loc=loc)
+		error(t, "FAIL", loc=loc)
 	}
 	t.error_count += 1
 	if t._fail_now != nil {
@@ -84,14 +84,14 @@ cleanup :: proc(t: ^T, procedure: proc(rawptr), user_data: rawptr) {
 
 expect :: proc(t: ^T, ok: bool, msg: string = "", loc := #caller_location) -> bool {
 	if !ok {
-		error(t=t, args={msg}, loc=loc)
+		error(t, msg, loc=loc)
 	}
 	return ok
 }
 expect_value :: proc(t: ^T, value, expected: $T, loc := #caller_location) -> bool where intrinsics.type_is_comparable(T) {
 	ok := value == expected
 	if !ok {
-		errorf(t=t, format="expected %v, got %v", args={expected, value}, loc=loc)
+		errorf(t, "expected %v, got %v", expected, value, loc=loc)
 	}
 	return ok
 }

core/text/table/table.odin

@@ -114,7 +114,7 @@ set_cell_alignment :: proc(tbl: ^Table, row, col: int, alignment: Cell_Alignment
 
 format :: proc(tbl: ^Table, _fmt: string, args: ..any, loc := #caller_location) -> string {
 	context.allocator = tbl.format_allocator
-	return fmt.aprintf(fmt = _fmt, args = args)
+	return fmt.aprintf(_fmt, ..args)
 }
 
 header :: proc(tbl: ^Table, values: ..any, loc := #caller_location) {

examples/demo/demo.odin

@@ -1175,13 +1175,13 @@ threading_example :: proc() {
 		N :: 3
 
 		pool: thread.Pool
-		thread.pool_init(pool=&pool, thread_count=N, allocator=context.allocator)
+		thread.pool_init(&pool, allocator=context.allocator, thread_count=N)
 		defer thread.pool_destroy(&pool)
 
 
 		for i in 0..<30 {
 			// be mindful of the allocator used for tasks. The allocator needs to be thread safe, or be owned by the task for exclusive use 
-			thread.pool_add_task(pool=&pool, procedure=task_proc, data=nil, user_index=i, allocator=context.allocator)
+			thread.pool_add_task(&pool, allocator=context.allocator, procedure=task_proc, data=nil, user_index=i)
 		}
 
 		thread.pool_start(&pool)

src/array.cpp

@@ -80,7 +80,9 @@ gb_internal Slice<T> slice_make(gbAllocator const &allocator, isize count) {
 	GB_ASSERT(count >= 0);
 	Slice<T> s = {};
 	s.data = gb_alloc_array(allocator, T, count);
-	GB_ASSERT(s.data != nullptr);
+	if (count > 0) {
+		GB_ASSERT(s.data != nullptr);
+	}
 	s.count = count;
 	return s;
 }

src/check_stmt.cpp

@@ -2207,7 +2207,13 @@ gb_internal void check_return_stmt(CheckerContext *ctx, Ast *node) {
 	} else if (operands.count != result_count) {
 		// Ignore error message as it has most likely already been reported
 		if (all_operands_valid(operands)) {
-			error(node, "Expected %td return values, got %td", result_count, operands.count);
+			if (operands.count == 1) {
+				gbString t = type_to_string(operands[0].type);
+				error(node, "Expected %td return values, got %td (%s)", result_count, operands.count, t);
+				gb_string_free(t);
+			} else {
+				error(node, "Expected %td return values, got %td", result_count, operands.count);
+			}
 		}
 	} else {
 		for (isize i = 0; i < result_count; i++) {

src/check_type.cpp

@@ -1416,7 +1416,7 @@ gb_internal ParameterValue handle_parameter_value(CheckerContext *ctx, Type *in_
 }
 
 
-gb_internal Type *check_get_params(CheckerContext *ctx, Scope *scope, Ast *_params, bool *is_variadic_, isize *variadic_index_, bool *success_, isize *specialization_count_, Array<Operand> *operands) {
+gb_internal Type *check_get_params(CheckerContext *ctx, Scope *scope, Ast *_params, bool *is_variadic_, isize *variadic_index_, bool *success_, isize *specialization_count_, Array<Operand> const *operands) {
 	if (_params == nullptr) {
 		return nullptr;
 	}
@@ -1664,7 +1664,6 @@ gb_internal Type *check_get_params(CheckerContext *ctx, Scope *scope, Ast *_para
 				ExactValue poly_const = {};
 
 				if (operands != nullptr && variables.count < operands->count) {
-
 					Operand op = (*operands)[variables.count];
 					if (op.expr == nullptr) {
 						// NOTE(bill): 2019-03-30
@@ -1967,7 +1966,7 @@ gb_internal Type *check_get_results(CheckerContext *ctx, Scope *scope, Ast *_res
 
 
 // NOTE(bill): 'operands' is for generating non generic procedure type
-gb_internal bool check_procedure_type(CheckerContext *ctx, Type *type, Ast *proc_type_node, Array<Operand> *operands) {
+gb_internal bool check_procedure_type(CheckerContext *ctx, Type *type, Ast *proc_type_node, Array<Operand> const *operands) {
 	ast_node(pt, ProcType, proc_type_node);
 
 	if (ctx->polymorphic_scope == nullptr && ctx->allow_polymorphic_types) {

src/error.cpp

@@ -265,7 +265,8 @@ gb_internal bool show_error_on_line(TokenPos const &pos, TokenPos end) {
 	defer (gb_string_free(the_line));
 
 	if (the_line != nullptr) {
-		String line = make_string(cast(u8 const *)the_line, gb_string_length(the_line));
+		char const *line_text = the_line;
+		isize line_len = gb_string_length(the_line);
 
 		// TODO(bill): This assumes ASCII
 
@@ -285,21 +286,27 @@ gb_internal bool show_error_on_line(TokenPos const &pos, TokenPos end) {
 
 		isize squiggle_extra = 0;
 
-		if (line.len > MAX_LINE_LENGTH_PADDED) {
+		if (line_len > MAX_LINE_LENGTH_PADDED) {
 			i32 left = MAX_TAB_WIDTH;
-			line.text += offset-left;
+			if (offset > 0) {
-			line.len  -= offset-left;
+				line_text += offset-left;
-			offset = left+MAX_TAB_WIDTH/2;
+				line_len  -= offset-left;
-			if (line.len > MAX_LINE_LENGTH_PADDED) {
+				offset = left+MAX_TAB_WIDTH/2;
-				line.len = MAX_LINE_LENGTH_PADDED;
+			}
-				if (error_length > line.len-left) {
+			if (line_len > MAX_LINE_LENGTH_PADDED) {
-					error_length = cast(i32)line.len - left;
+				line_len = MAX_LINE_LENGTH_PADDED;
+				if (error_length > line_len-left) {
+					error_length = cast(i32)line_len - left;
 					squiggle_extra = 1;
 				}
 			}
-			error_out("... %.*s ...", LIT(line));
+			if (offset > 0) {
+				error_out("... %.*s ...", cast(i32)line_len, line_text);
+			} else {
+				error_out("%.*s ...", cast(i32)line_len, line_text);
+			}
 		} else {
-			error_out("%.*s", LIT(line));
+			error_out("%.*s", cast(i32)line_len, line_text);
 		}
 		error_out("\n\t");
 
@@ -312,7 +319,7 @@ gb_internal bool show_error_on_line(TokenPos const &pos, TokenPos end) {
 		error_out("^");
 		if (end.file_id == pos.file_id) {
 			if (end.line > pos.line) {
-				for (i32 i = offset; i < line.len; i++) {
+				for (i32 i = offset; i < line_len; i++) {
 					error_out("~");
 				}
 			} else if (end.line == pos.line && end.column > pos.column) {

src/gb/gb.h

@@ -3299,12 +3299,39 @@ void const *gb_memrchr(void const *data, u8 c, isize n) {
 
 
 
-gb_inline void *gb_alloc_align (gbAllocator a, isize size, isize alignment)                                { return a.proc(a.data, gbAllocation_Alloc, size, alignment, NULL, 0, GB_DEFAULT_ALLOCATOR_FLAGS); }
+gb_inline void *gb_alloc_align (gbAllocator a, isize size, isize alignment) {
-gb_inline void *gb_alloc       (gbAllocator a, isize size)                                                 { return gb_alloc_align(a, size, GB_DEFAULT_MEMORY_ALIGNMENT); }
+	if (size == 0) {
-gb_inline void  gb_free        (gbAllocator a, void *ptr)                                                  { if (ptr != NULL) a.proc(a.data, gbAllocation_Free, 0, 0, ptr, 0, GB_DEFAULT_ALLOCATOR_FLAGS); }
+		return NULL;
-gb_inline void  gb_free_all    (gbAllocator a)                                                             { a.proc(a.data, gbAllocation_FreeAll, 0, 0, NULL, 0, GB_DEFAULT_ALLOCATOR_FLAGS); }
+	}
-gb_inline void *gb_resize      (gbAllocator a, void *ptr, isize old_size, isize new_size)                  { return gb_resize_align(a, ptr, old_size, new_size, GB_DEFAULT_MEMORY_ALIGNMENT); }
+	return a.proc(a.data, gbAllocation_Alloc, size, alignment, NULL, 0, GB_DEFAULT_ALLOCATOR_FLAGS);
-gb_inline void *gb_resize_align(gbAllocator a, void *ptr, isize old_size, isize new_size, isize alignment) { return a.proc(a.data, gbAllocation_Resize, new_size, alignment, ptr, old_size, GB_DEFAULT_ALLOCATOR_FLAGS); }
+}
+gb_inline void *gb_alloc(gbAllocator a, isize size) {
+	return gb_alloc_align(a, size, GB_DEFAULT_MEMORY_ALIGNMENT);
+}
+gb_inline void  gb_free(gbAllocator a, void *ptr) {
+	if (ptr != NULL) {
+		a.proc(a.data, gbAllocation_Free, 0, 0, ptr, 0, GB_DEFAULT_ALLOCATOR_FLAGS);
+	}
+}
+gb_inline void  gb_free_all(gbAllocator a) {
+	a.proc(a.data, gbAllocation_FreeAll, 0, 0, NULL, 0, GB_DEFAULT_ALLOCATOR_FLAGS);
+}
+gb_inline void *gb_resize(gbAllocator a, void *ptr, isize old_size, isize new_size) {
+	return gb_resize_align(a, ptr, old_size, new_size, GB_DEFAULT_MEMORY_ALIGNMENT);
+}
+gb_inline void *gb_resize_align(gbAllocator a, void *ptr, isize old_size, isize new_size, isize alignment) {
+	if (new_size == 0) {
+		if (ptr != NULL) {
+			return a.proc(a.data, gbAllocation_Free, 0, 0, ptr, old_size, GB_DEFAULT_ALLOCATOR_FLAGS);
+		}
+		return NULL;
+	} else if (ptr == NULL) {
+		return a.proc(a.data, gbAllocation_Alloc, new_size, alignment, NULL, 0, GB_DEFAULT_ALLOCATOR_FLAGS);
+	} else if (old_size == new_size && ((uintptr)ptr % (uintptr)alignment) == 0) {
+		return ptr;
+	}
+	return a.proc(a.data, gbAllocation_Resize, new_size, alignment, ptr, old_size, GB_DEFAULT_ALLOCATOR_FLAGS);
+}
 
 gb_inline void *gb_alloc_copy      (gbAllocator a, void const *src, isize size) {
 	return gb_memcopy(gb_alloc(a, size), src, size);

src/llvm_backend_proc.cpp

@@ -1160,7 +1160,13 @@ gb_internal lbValue lb_emit_call(lbProcedure *p, lbValue value, Array<lbValue> c
 
 	}
 
-	Entity **found = map_get(&p->module->procedure_values, value.value);
+	LLVMValueRef the_proc_value = value.value;
+
+	if (LLVMIsAConstantExpr(the_proc_value)) {
+		// NOTE(bill): it's a bit cast
+		the_proc_value = LLVMGetOperand(the_proc_value, 0);
+	}
+	Entity **found = map_get(&p->module->procedure_values, the_proc_value);
 	if (found != nullptr) {
 		Entity *e = *found;
 		if (e != nullptr && entity_has_deferred_procedure(e)) {
@@ -3145,6 +3151,18 @@ gb_internal lbValue lb_build_call_expr(lbProcedure *p, Ast *expr) {
 	}
 	return res;
 }
+
+gb_internal void lb_add_values_to_array(lbProcedure *p, Array<lbValue> *args, lbValue value) {
+	if (is_type_tuple(value.type)) {
+		for_array(i, value.type->Tuple.variables) {
+			lbValue sub_value = lb_emit_struct_ev(p, value, cast(i32)i);
+			array_add(args, sub_value);
+		}
+	} else {
+		array_add(args, value);
+	}
+}
+
 gb_internal lbValue lb_build_call_expr_internal(lbProcedure *p, Ast *expr) {
 	lbModule *m = p->module;
 
@@ -3219,245 +3237,143 @@ gb_internal lbValue lb_build_call_expr_internal(lbProcedure *p, Ast *expr) {
 	GB_ASSERT(proc_type_->kind == Type_Proc);
 	TypeProc *pt = &proc_type_->Proc;
 
-	if (is_call_expr_field_value(ce)) {
+	GB_ASSERT(ce->split_args != nullptr);
-		auto args = array_make<lbValue>(permanent_allocator(), pt->param_count);
 
-		for_array(arg_index, ce->args) {
+	auto args = array_make<lbValue>(permanent_allocator(), 0, pt->param_count);
-			Ast *arg = ce->args[arg_index];
-			ast_node(fv, FieldValue, arg);
-			GB_ASSERT(fv->field->kind == Ast_Ident);
-			String name = fv->field->Ident.token.string;
-			isize index = lookup_procedure_parameter(pt, name);
-			GB_ASSERT(index >= 0);
-			TypeAndValue tav = type_and_value_of_expr(fv->value);
-			if (tav.mode == Addressing_Type) {
-				args[index] = lb_const_nil(m, tav.type);
-			} else {
-				args[index] = lb_build_expr(p, fv->value);
-			}
-		}
-		TypeTuple *params = &pt->params->Tuple;
-		for (isize i = 0; i < args.count; i++) {
-			Entity *e = params->variables[i];
-			if (e->kind == Entity_TypeName) {
-				args[i] = lb_const_nil(m, e->type);
-			} else if (e->kind == Entity_Constant) {
-				continue;
-			} else {
-				GB_ASSERT(e->kind == Entity_Variable);
-				if (args[i].value == nullptr) {
-					args[i] = lb_handle_param_value(p, e->type, e->Variable.param_value, ast_token(expr).pos);
-				} else if (is_type_typeid(e->type) && !is_type_typeid(args[i].type)) {
-					args[i] = lb_typeid(p->module, args[i].type);
-				} else {
-					args[i] = lb_emit_conv(p, args[i], e->type);
-				}
-			}
-		}
 
-		for (isize i = 0; i < args.count; i++) {
+	bool vari_expand = (ce->ellipsis.pos.line != 0);
-			Entity *e = params->variables[i];
-			if (args[i].type == nullptr) {
-				continue;
-			} else if (is_type_untyped_uninit(args[i].type)) {
-				args[i] = lb_const_undef(m, e->type);
-			} else if (is_type_untyped_nil(args[i].type)) {
-				args[i] = lb_const_nil(m, e->type);
-			}
-		}
-
-		return lb_emit_call(p, value, args, ce->inlining);
-	}
-
-	isize arg_index = 0;
-
-	isize arg_count = 0;
-	for_array(i, ce->args) {
-		Ast *arg = ce->args[i];
-		TypeAndValue tav = type_and_value_of_expr(arg);
-		GB_ASSERT_MSG(tav.mode != Addressing_Invalid, "%s %s %d", expr_to_string(arg), expr_to_string(expr), tav.mode);
-		GB_ASSERT_MSG(tav.mode != Addressing_ProcGroup, "%s", expr_to_string(arg));
-		Type *at = tav.type;
-		if (is_type_tuple(at)) {
-			arg_count += at->Tuple.variables.count;
-		} else {
-			arg_count++;
-		}
-	}
-
-	isize param_count = 0;
-	if (pt->params) {
-		GB_ASSERT(pt->params->kind == Type_Tuple);
-		param_count = pt->params->Tuple.variables.count;
-	}
-
-	auto args = array_make<lbValue>(permanent_allocator(), cast(isize)gb_max(param_count, arg_count));
-	isize variadic_index = pt->variadic_index;
-	bool variadic = pt->variadic && variadic_index >= 0;
-	bool vari_expand = ce->ellipsis.pos.line != 0;
 	bool is_c_vararg = pt->c_vararg;
 
-	String proc_name = {};
+	for_array(i, ce->split_args->positional) {
-	if (p->entity != nullptr) {
+		Entity *e = pt->params->Tuple.variables[i];
-		proc_name = p->entity->token.string;
+		if (e->kind == Entity_TypeName) {
+			array_add(&args, lb_const_nil(p->module, e->type));
+			continue;
+		} else if (e->kind == Entity_Constant) {
+			array_add(&args, lb_const_value(p->module, e->type, e->Constant.value));
+			continue;
+		}
+
+		GB_ASSERT(e->kind == Entity_Variable);
+
+		if (pt->variadic && pt->variadic_index == i) {
+			lbValue variadic_args = lb_const_nil(p->module, e->type);
+			auto variadic = slice(ce->split_args->positional, pt->variadic_index, ce->split_args->positional.count);
+			if (variadic.count != 0) {
+				// variadic call argument generation
+				Type *slice_type = e->type;
+				GB_ASSERT(slice_type->kind == Type_Slice);
+
+				if (is_c_vararg) {
+					GB_ASSERT(!vari_expand);
+
+					Type *elem_type = slice_type->Slice.elem;
+
+					for (Ast *var_arg : variadic) {
+						lbValue arg = lb_build_expr(p, var_arg);
+						if (is_type_any(elem_type)) {
+							array_add(&args, lb_emit_conv(p, arg, default_type(arg.type)));
+						} else {
+							array_add(&args, lb_emit_conv(p, arg, elem_type));
+						}
+					}
+					break;
+				} else if (vari_expand) {
+					GB_ASSERT(variadic.count == 1);
+					variadic_args = lb_build_expr(p, variadic[0]);
+					variadic_args = lb_emit_conv(p, variadic_args, slice_type);
+				} else {
+					Type *elem_type = slice_type->Slice.elem;
+
+					auto var_args = array_make<lbValue>(heap_allocator(), 0, variadic.count);
+					defer (array_free(&var_args));
+					for (Ast *var_arg : variadic) {
+						lbValue v = lb_build_expr(p, var_arg);
+						lb_add_values_to_array(p, &var_args, v);
+					}
+					isize slice_len = var_args.count;
+					if (slice_len > 0) {
+						lbAddr slice = lb_add_local_generated(p, slice_type, true);
+						lbAddr base_array = lb_add_local_generated(p, alloc_type_array(elem_type, slice_len), true);
+
+						for (isize i = 0; i < var_args.count; i++) {
+							lbValue addr = lb_emit_array_epi(p, base_array.addr, cast(i32)i);
+							lbValue var_arg = var_args[i];
+							var_arg = lb_emit_conv(p, var_arg, elem_type);
+							lb_emit_store(p, addr, var_arg);
+						}
+
+						lbValue base_elem = lb_emit_array_epi(p, base_array.addr, 0);
+						lbValue len = lb_const_int(p->module, t_int, slice_len);
+						lb_fill_slice(p, slice, base_elem, len);
+
+						variadic_args = lb_addr_load(p, slice);
+					}
+				}
+			}
+			array_add(&args, variadic_args);
+
+			break;
+		} else {
+			lbValue value = lb_build_expr(p, ce->split_args->positional[i]);
+			lb_add_values_to_array(p, &args, value);
+		}
 	}
+
+	if (!is_c_vararg) {
+		array_resize(&args, pt->param_count);
+	}
+
+	for (Ast *arg : ce->split_args->named) {
+		ast_node(fv, FieldValue, arg);
+		GB_ASSERT(fv->field->kind == Ast_Ident);
+		String name = fv->field->Ident.token.string;
+		gb_unused(name);
+		isize param_index = lookup_procedure_parameter(pt, name);
+		GB_ASSERT(param_index >= 0);
+
+		lbValue value = lb_build_expr(p, fv->value);
+		GB_ASSERT(!is_type_tuple(value.type));
+		args[param_index] = value;
+	}
+
 	TokenPos pos = ast_token(ce->proc).pos;
 
-	TypeTuple *param_tuple = nullptr;
-	if (pt->params) {
-		GB_ASSERT(pt->params->kind == Type_Tuple);
-		param_tuple = &pt->params->Tuple;
-	}
 
-	for_array(i, ce->args) {
+	if (pt->params != nullptr)  {
-		Ast *arg = ce->args[i];
+		GB_ASSERT(args.count >= pt->params->Tuple.variables.count);
-		TypeAndValue arg_tv = type_and_value_of_expr(arg);
+		for_array(arg_index, pt->params->Tuple.variables) {
-		if (arg_tv.mode == Addressing_Type) {
+			Entity *e = pt->params->Tuple.variables[arg_index];
-			args[arg_index++] = lb_const_nil(m, arg_tv.type);
+			if (pt->variadic && arg_index == pt->variadic_index) {
-		} else {
+				if (!is_c_vararg && args[arg_index].value == 0) {
-			lbValue a = lb_build_expr(p, arg);
+					args[arg_index] = lb_const_nil(p->module, e->type);
-			Type *at = a.type;
-			if (at->kind == Type_Tuple) {
-				lbTupleFix *tf = map_get(&p->tuple_fix_map, a.value);
-				if (tf) {
-					for_array(j, tf->values) {
-						args[arg_index++] = tf->values[j];
-					}
-				} else {
-					for_array(j, at->Tuple.variables) {
-						lbValue v = lb_emit_struct_ev(p, a, cast(i32)j);
-						args[arg_index++] = v;
-					}
 				}
-			} else {
-				args[arg_index++] = a;
-			}
-		}
-	}
-
-
-	if (param_count > 0) {
-		GB_ASSERT_MSG(pt->params != nullptr, "%s %td", expr_to_string(expr), pt->param_count);
-		GB_ASSERT(param_count < 1000000);
-
-		if (arg_count < param_count) {
-			isize end = cast(isize)param_count;
-			if (variadic) {
-				end = variadic_index;
-			}
-			while (arg_index < end) {
-				Entity *e = param_tuple->variables[arg_index];
-				GB_ASSERT(e->kind == Entity_Variable);
-				args[arg_index++] = lb_handle_param_value(p, e->type, e->Variable.param_value, ast_token(expr).pos);
-			}
-		}
-
-		if (is_c_vararg) {
-			GB_ASSERT(variadic);
-			GB_ASSERT(!vari_expand);
-			isize i = 0;
-			for (; i < variadic_index; i++) {
-				Entity *e = param_tuple->variables[i];
-				if (e->kind == Entity_Variable) {
-					args[i] = lb_emit_conv(p, args[i], e->type);
-				}
-			}
-			Type *variadic_type = param_tuple->variables[i]->type;
-			GB_ASSERT(is_type_slice(variadic_type));
-			variadic_type = base_type(variadic_type)->Slice.elem;
-			if (!is_type_any(variadic_type)) {
-				for (; i < arg_count; i++) {
-					args[i] = lb_emit_conv(p, args[i], variadic_type);
-				}
-			} else {
-				for (; i < arg_count; i++) {
-					args[i] = lb_emit_conv(p, args[i], default_type(args[i].type));
-				}
-			}
-		} else if (variadic) {
-			isize i = 0;
-			for (; i < variadic_index; i++) {
-				Entity *e = param_tuple->variables[i];
-				if (e->kind == Entity_Variable) {
-					args[i] = lb_emit_conv(p, args[i], e->type);
-				}
-			}
-			if (!vari_expand) {
-				Type *variadic_type = param_tuple->variables[i]->type;
-				GB_ASSERT(is_type_slice(variadic_type));
-				variadic_type = base_type(variadic_type)->Slice.elem;
-				for (; i < arg_count; i++) {
-					args[i] = lb_emit_conv(p, args[i], variadic_type);
-				}
-			}
-		} else {
-			for (isize i = 0; i < param_count; i++) {
-				Entity *e = param_tuple->variables[i];
-				if (e->kind == Entity_Variable) {
-					if (args[i].value == nullptr) {
-						continue;
-					}
-					GB_ASSERT_MSG(args[i].value != nullptr, "%.*s", LIT(e->token.string));
-					if (is_type_typeid(e->type) && !is_type_typeid(args[i].type)) {
-						GB_ASSERT(LLVMIsNull(args[i].value));
-						args[i] = lb_typeid(p->module, args[i].type);
-					} else {
-						args[i] = lb_emit_conv(p, args[i], e->type);
-					}
-				}
-			}
-		}
-
-		if (variadic && !vari_expand && !is_c_vararg) {
-			// variadic call argument generation
-			Type *slice_type = param_tuple->variables[variadic_index]->type;
-			Type *elem_type  = base_type(slice_type)->Slice.elem;
-			lbAddr slice = lb_add_local_generated(p, slice_type, true);
-			isize slice_len = arg_count+1 - (variadic_index+1);
-
-			if (slice_len > 0) {
-				lbAddr base_array = lb_add_local_generated(p, alloc_type_array(elem_type, slice_len), true);
-
-				for (isize i = variadic_index, j = 0; i < arg_count; i++, j++) {
-					lbValue addr = lb_emit_array_epi(p, base_array.addr, cast(i32)j);
-					lb_emit_store(p, addr, args[i]);
-				}
-
-				lbValue base_elem = lb_emit_array_epi(p, base_array.addr, 0);
-				lbValue len = lb_const_int(m, t_int, slice_len);
-				lb_fill_slice(p, slice, base_elem, len);
-			}
-
-			arg_count = param_count;
-			args[variadic_index] = lb_addr_load(p, slice);
-		}
-	}
-
-	if (variadic && variadic_index+1 < param_count) {
-		for (isize i = variadic_index+1; i < param_count; i++) {
-			Entity *e = param_tuple->variables[i];
-			args[i] = lb_handle_param_value(p, e->type, e->Variable.param_value, ast_token(expr).pos);
-		}
-	}
-
-	isize final_count = param_count;
-	if (is_c_vararg) {
-		final_count = arg_count;
-	}
-
-	if (param_tuple != nullptr) {
-		for (isize i = 0; i < gb_min(args.count, param_tuple->variables.count); i++) {
-			Entity *e = param_tuple->variables[i];
-			if (args[i].type == nullptr) {
 				continue;
-			} else if (is_type_untyped_uninit(args[i].type)) {
+			}
-				args[i] = lb_const_undef(m, e->type);
+
-			} else if (is_type_untyped_nil(args[i].type)) {
+			lbValue arg = args[arg_index];
-				args[i] = lb_const_nil(m, e->type);
+			if (arg.value == nullptr) {
+				switch (e->kind) {
+				case Entity_TypeName:
+					args[arg_index] = lb_const_nil(p->module, e->type);
+					break;
+				case Entity_Variable:
+					args[arg_index] = lb_handle_param_value(p, e->type, e->Variable.param_value, pos);
+					break;
+
+				case Entity_Constant:
+					args[arg_index] = lb_const_value(p->module, e->type, e->Constant.value);
+					break;
+				default:
+					GB_PANIC("Unknown entity kind %.*s\n", LIT(entity_strings[e->kind]));
+				}
+			} else {
+				args[arg_index] = lb_emit_conv(p, arg, e->type);
 			}
 		}
 	}
 
+	isize final_count = is_c_vararg ? args.count : pt->param_count;
 	auto call_args = array_slice(args, 0, final_count);
 	return lb_emit_call(p, value, call_args, ce->inlining);
 }

src/parser.cpp

@@ -2752,9 +2752,9 @@ gb_internal Ast *parse_call_expr(AstFile *f, Ast *operand) {
 
 	open_paren = expect_token(f, Token_OpenParen);
 
+	bool seen_ellipsis = false;
 	while (f->curr_token.kind != Token_CloseParen &&
-	       f->curr_token.kind != Token_EOF &&
+	       f->curr_token.kind != Token_EOF) {
-	       ellipsis.pos.line == 0) {
 		if (f->curr_token.kind == Token_Comma) {
 			syntax_error(f->curr_token, "Expected an expression not ,");
 		} else if (f->curr_token.kind == Token_Eq) {
@@ -2777,11 +2777,15 @@ gb_internal Ast *parse_call_expr(AstFile *f, Ast *operand) {
 
 			Ast *value = parse_value(f);
 			arg = ast_field_value(f, arg, value, eq);
-
+		} else if (seen_ellipsis) {
-
+			syntax_error(arg, "Positional arguments are not allowed after '..'");
 		}
 		array_add(&args, arg);
 
+		if (ellipsis.pos.line != 0) {
+			seen_ellipsis = true;
+		}
+
 		if (!allow_field_separator(f)) {
 			break;
 		}

src/parser.hpp

@@ -367,6 +367,11 @@ gb_global char const *union_type_kind_strings[UnionType_COUNT] = {
 	"#shared_nil",
 };
 
+struct AstSplitArgs {
+	Slice<Ast *> positional;
+	Slice<Ast *> named;
+};
+
 #define AST_KINDS \
 	AST_KIND(Ident,          "identifier",      struct { \
 		Token   token;  \
@@ -442,6 +447,7 @@ AST_KIND(_ExprBegin,  "",  bool) \
 		ProcInlining inlining; \
 		bool         optional_ok_one; \
 		bool         was_selector; \
+		AstSplitArgs *split_args; \
 	}) \
 	AST_KIND(FieldValue,      "field value",              struct { Token eq; Ast *field, *value; }) \
 	AST_KIND(EnumFieldValue,  "enum field value",         struct { \

src/parser_pos.cpp

@@ -37,11 +37,15 @@ gb_internal Token ast_token(Ast *node) {
 			return ast_token(node->ImplicitSelectorExpr.selector);
 		}
 		return node->ImplicitSelectorExpr.token;
-	case Ast_IndexExpr:          return node->IndexExpr.open;
+	case Ast_IndexExpr:          return ast_token(node->IndexExpr.expr);
-	case Ast_MatrixIndexExpr:    return node->MatrixIndexExpr.open;
+	case Ast_MatrixIndexExpr:    return ast_token(node->MatrixIndexExpr.expr);
-	case Ast_SliceExpr:          return node->SliceExpr.open;
+	case Ast_SliceExpr:          return ast_token(node->SliceExpr.expr);
 	case Ast_Ellipsis:           return node->Ellipsis.token;
-	case Ast_FieldValue:         return node->FieldValue.eq;
+	case Ast_FieldValue:
+		if (node->FieldValue.field) {
+			return ast_token(node->FieldValue.field);
+		}
+		return node->FieldValue.eq;
 	case Ast_EnumFieldValue:     return ast_token(node->EnumFieldValue.name);
 	case Ast_DerefExpr:          return node->DerefExpr.op;
 	case Ast_TernaryIfExpr:      return ast_token(node->TernaryIfExpr.x);

src/types.cpp

@@ -2108,8 +2108,12 @@ gb_internal bool is_type_polymorphic(Type *t, bool or_specialized=false) {
 		return is_type_polymorphic(t->Matrix.elem, or_specialized);
 
 	case Type_Tuple:
-		for_array(i, t->Tuple.variables) {
+		for (Entity *e : t->Tuple.variables) {
-			if (is_type_polymorphic(t->Tuple.variables[i]->type, or_specialized)) {
+			if (e->kind == Entity_Constant) {
+				if (e->Constant.value.kind != ExactValue_Invalid) {
+					return or_specialized;
+				}
+			} else if (is_type_polymorphic(e->type, or_specialized)) {
 				return true;
 			}
 		}
@@ -2119,7 +2123,6 @@ gb_internal bool is_type_polymorphic(Type *t, bool or_specialized=false) {
 		if (t->Proc.is_polymorphic) {
 			return true;
 		}
-		#if 1
 		if (t->Proc.param_count > 0 &&
 		    is_type_polymorphic(t->Proc.params, or_specialized)) {
 			return true;
@@ -2128,7 +2131,6 @@ gb_internal bool is_type_polymorphic(Type *t, bool or_specialized=false) {
 		    is_type_polymorphic(t->Proc.results, or_specialized)) {
 			return true;
 		}
-		#endif
 		break;
 
 	case Type_Enum:
@@ -3326,6 +3328,9 @@ gb_internal bool are_struct_fields_reordered(Type *type) {
 	type = base_type(type);
 	GB_ASSERT(type->kind == Type_Struct);
 	type_set_offsets(type);
+	if (type->Struct.fields.count == 0) {
+		return false;
+	}
 	GB_ASSERT(type->Struct.offsets != nullptr);
 	
 	i64 prev_offset = 0;
@@ -3344,6 +3349,9 @@ gb_internal Slice<i32> struct_fields_index_by_increasing_offset(gbAllocator allo
 	type = base_type(type);
 	GB_ASSERT(type->kind == Type_Struct);
 	type_set_offsets(type);
+	if (type->Struct.fields.count == 0) {
+		return {};
+	}
 	GB_ASSERT(type->Struct.offsets != nullptr);
 	
 	auto indices = slice_make<i32>(allocator, type->Struct.fields.count);
@@ -4273,6 +4281,10 @@ gb_internal gbString write_type_to_string(gbString str, Type *type, bool shortha
 				if (var == nullptr) {
 					continue;
 				}
+				if (comma_index++ > 0) {
+					str = gb_string_appendc(str, ", ");
+				}
+
 				String name = var->token.string;
 				if (var->kind == Entity_Constant) {
 					str = gb_string_appendc(str, "$");
@@ -4289,10 +4301,6 @@ gb_internal gbString write_type_to_string(gbString str, Type *type, bool shortha
 					continue;
 				}
 
-				if (comma_index++ > 0) {
-					str = gb_string_appendc(str, ", ");
-				}
-
 				if (var->kind == Entity_Variable) {
 					if (var->flags&EntityFlag_CVarArg) {
 						str = gb_string_appendc(str, "#c_vararg ");