while; range is now for; remove ++ and --

code/demo.odin

@@ -21,13 +21,13 @@ main :: proc() {
 	msg := "Hellope";
 	list := []int{1, 4, 7, 3, 7, 2, 1};
 
-	range value : msg {
+	for value : msg {
 		fmt.println(value);
 	}
-	range value : list {
+	for value : list {
 		fmt.println(value);
 	}
-	range x : 0 ..< 5 {
-		fmt.println(x);
+	for val, idx : 12 ..< 17 {
+		fmt.println(val, idx);
 	}
 }

core/_preload.odin

@@ -313,19 +313,19 @@ __bounds_check_error :: proc(file: string, line, column: int, index, count: int)
 	__debug_trap();
 }
 
-__slice_expr_error :: proc(file: string, line, column: int, low, high, max: int) {
-	if 0 <= low && low <= high && high <= max {
+__slice_expr_error :: proc(file: string, line, column: int, low, high: int) {
+	if 0 <= low && low <= high {
 		return;
 	}
-	fmt.fprintf(os.stderr, "%(%:%) Invalid slice indices: [%:%:%]\n",
-	            file, line, column, low, high, max);
+	fmt.fprintf(os.stderr, "%(%:%) Invalid slice indices: [%:%]\n",
+	            file, line, column, low, high);
 	__debug_trap();
 }
 __substring_expr_error :: proc(file: string, line, column: int, low, high: int) {
 	if 0 <= low && low <= high {
 		return;
 	}
-	fmt.fprintf(os.stderr, "%(%:%) Invalid substring indices: [%:%:%]\n",
+	fmt.fprintf(os.stderr, "%(%:%) Invalid substring indices: [%:%]\n",
 	            file, line, column, low, high);
 	__debug_trap();
 }

core/atomic.odin

@@ -37,8 +37,8 @@ fetch_or32 :: proc(a: ^i32, operand: i32) -> i32 {
 spin_lock32 :: proc(a: ^i32, time_out: int) -> bool { // NOTE(bill) time_out = -1 as default
 	old_value := compare_exchange32(a, 1, 0);
 	counter := 0;
-	for old_value != 0 && (time_out < 0 || counter < time_out) {
-		counter++;
+	while old_value != 0 && (time_out < 0 || counter < time_out) {
+		counter += 1;
 		yield_thread();
 		old_value = compare_exchange32(a, 1, 0);
 		mfence();
@@ -81,8 +81,8 @@ fetch_or64 :: proc(a: ^i64, operand: i64) -> i64 {
 spin_lock64 :: proc(a: ^i64, time_out: int) -> bool { // NOTE(bill) time_out = -1 as default
 	old_value := compare_exchange64(a, 1, 0);
 	counter := 0;
-	for old_value != 0 && (time_out < 0 || counter < time_out) {
-		counter++;
+	while old_value != 0 && (time_out < 0 || counter < time_out) {
+		counter += 1;
 		yield_thread();
 		old_value = compare_exchange64(a, 1, 0);
 		mfence();

core/fmt.odin

@@ -4,84 +4,90 @@
 
 PRINT_BUF_SIZE :: 1<<12;
 
-fprint :: proc(fd: os.Handle, args: ..any) -> int {
-	data: [PRINT_BUF_SIZE]byte;
-	buf := data[:0];
-	bprint(^buf, ..args);
-	os.write(fd, buf);
-	return buf.count;
-}
-
-fprintln :: proc(fd: os.Handle, args: ..any) -> int {
-	data: [PRINT_BUF_SIZE]byte;
-	buf := data[:0];
-	bprintln(^buf, ..args);
-	os.write(fd, buf);
-	return buf.count;
-}
-fprintf :: proc(fd: os.Handle, fmt: string, args: ..any) -> int {
-	data: [PRINT_BUF_SIZE]byte;
-	buf := data[:0];
-	bprintf(^buf, fmt, ..args);
-	os.write(fd, buf);
-	return buf.count;
+Buffer :: struct {
+	data:   []byte;
+	length: int;
 }
 
 
-print :: proc(args: ..any) -> int {
-	return fprint(os.stdout, ..args);
+fprint :: proc(fd: os.Handle, args: ...any) -> int {
+	data: [PRINT_BUF_SIZE]byte;
+	buf := Buffer{data[:], 0};
+	bprint(^buf, ...args);
+	os.write(fd, buf.data[:buf.length]);
+	return buf.length;
 }
-println :: proc(args: ..any) -> int {
-	return fprintln(os.stdout, ..args);
+
+fprintln :: proc(fd: os.Handle, args: ...any) -> int {
+	data: [PRINT_BUF_SIZE]byte;
+	buf := Buffer{data[:], 0};
+	bprintln(^buf, ...args);
+	os.write(fd, buf.data[:buf.length]);
+	return buf.length;
 }
-printf :: proc(fmt: string, args: ..any) -> int {
-	return fprintf(os.stdout, fmt, ..args);
+fprintf :: proc(fd: os.Handle, fmt: string, args: ...any) -> int {
+	data: [PRINT_BUF_SIZE]byte;
+	buf := Buffer{data[:], 0};
+	bprintf(^buf, fmt, ...args);
+	os.write(fd, buf.data[:buf.length]);
+	return buf.length;
+}
+
+
+print :: proc(args: ...any) -> int {
+	return fprint(os.stdout, ...args);
+}
+println :: proc(args: ...any) -> int {
+	return fprintln(os.stdout, ...args);
+}
+printf :: proc(fmt: string, args: ...any) -> int {
+	return fprintf(os.stdout, fmt, ...args);
 }
 
 
 
 fprint_type :: proc(fd: os.Handle, info: ^Type_Info) {
 	data: [PRINT_BUF_SIZE]byte;
-	buf := data[:0];
+	buf := Buffer{data[:], 0};
 	bprint_type(^buf, info);
-	os.write(fd, buf);
+	os.write(fd, buf.data[:buf.length]);
 }
 
 
 
-print_byte_buffer :: proc(buf: ^[]byte, b: []byte) {
-	if buf.count < buf.capacity {
-		n := min(buf.capacity-buf.count, b.count);
+print_byte_buffer :: proc(buf: ^Buffer, b: []byte) {
+	if buf.length < buf.data.count {
+		n := min(buf.data.count-buf.length, b.count);
 		if n > 0 {
-			mem.copy(buf.data + buf.count, b.data, n);
-			buf.count += n;
+			copy(buf.data[buf.length:], b[:n]);
+			buf.length += n;
 		}
 	}
 }
 
-bprint_string :: proc(buf: ^[]byte, s: string) {
+bprint_string :: proc(buf: ^Buffer, s: string) {
 	print_byte_buffer(buf, s as []byte);
 }
 
 
 byte_reverse :: proc(b: []byte) {
 	n := b.count;
-	for i := 0; i < n/2; i++ {
+	for i : 0..<n/2 {
 		b[i], b[n-1-i] = b[n-1-i], b[i];
 	}
 }
 
-bprint_rune :: proc(buf: ^[]byte, r: rune) {
+bprint_rune :: proc(buf: ^Buffer, r: rune) {
 	b, n := utf8.encode_rune(r);
 	bprint_string(buf, b[:n] as string);
 }
 
-bprint_space :: proc(buf: ^[]byte) { bprint_rune(buf, ' '); }
-bprint_nl :: proc   (buf: ^[]byte) { bprint_rune(buf, '\n'); }
+bprint_space :: proc(buf: ^Buffer) { bprint_rune(buf, ' '); }
+bprint_nl :: proc   (buf: ^Buffer) { bprint_rune(buf, '\n'); }
 
 __NUM_TO_CHAR_TABLE := "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz@$";
 
-bprint_bool :: proc(buffer: ^[]byte, b: bool) {
+bprint_bool :: proc(buffer: ^Buffer, b: bool) {
 	if b {
 		bprint_string(buffer, "true");
 	} else {
@@ -89,31 +95,31 @@ bprint_bool :: proc(buffer: ^[]byte, b: bool) {
 	}
 }
 
-bprint_pointer :: proc(buffer: ^[]byte, p: rawptr) #inline {
+bprint_pointer :: proc(buffer: ^Buffer, p: rawptr) #inline {
 	bprint_string(buffer, "0x");
 	bprint_u64(buffer, p as uint as u64);
 }
 
-// bprint_f16 :: proc (buffer: ^[]byte, f: f32)  #inline { print__f64(buffer, f as f64, 4); }
-bprint_f32 :: proc (buffer: ^[]byte, f: f32)  #inline { print__f64(buffer, f as f64, 7); }
-bprint_f64 :: proc (buffer: ^[]byte, f: f64)  #inline { print__f64(buffer, f as f64, 16); }
-bprint_u64 :: proc(buffer: ^[]byte, value: u64) {
+// bprint_f16 :: proc (buffer: ^Buffer, f: f32)  #inline { print__f64(buffer, f as f64, 4); }
+bprint_f32 :: proc (buffer: ^Buffer, f: f32)  #inline { print__f64(buffer, f as f64, 7); }
+bprint_f64 :: proc (buffer: ^Buffer, f: f64)  #inline { print__f64(buffer, f as f64, 16); }
+bprint_u64 :: proc(buffer: ^Buffer, value: u64) {
 	i := value;
 	buf :[20]byte;
 	len := 0;
 	if i == 0 {
 		buf[len] = '0';
-		len++;
+		len += 1;
 	}
-	for i > 0 {
+	while i > 0 {
 		buf[len] = __NUM_TO_CHAR_TABLE[i % 10];
-		len++;
+		len += 1;
 		i /= 10;
 	}
 	byte_reverse(buf[:len]);
 	bprint_string(buffer, buf[:len] as string);
 }
-bprint_i64 :: proc(buffer: ^[]byte, value: i64) {
+bprint_i64 :: proc(buffer: ^Buffer, value: i64) {
 	// TODO(bill): Cleanup printing
 	i := value;
 	if i < 0 {
@@ -124,14 +130,14 @@ bprint_i64 :: proc(buffer: ^[]byte, value: i64) {
 }
 
 /*
-bprint_u128 :: proc(buffer: ^[]byte, value u128) {
+bprint_u128 :: proc(buffer: ^Buffer, value u128) {
 	a := value transmute [2]u64;
 	if a[1] != 0 {
 		bprint_u64(buffer, a[1]);
 	}
 	bprint_u64(buffer, a[0]);
 }
-bprint_i128 :: proc(buffer: ^[]byte, value i128) {
+bprint_i128 :: proc(buffer: ^Buffer, value i128) {
 	i := value;
 	if i < 0 {
 		i = -i;
@@ -142,7 +148,7 @@ bprint_i128 :: proc(buffer: ^[]byte, value i128) {
 */
 
 
-print__f64 :: proc(buffer: ^[]byte, value: f64, decimal_places: int) {
+print__f64 :: proc(buffer: ^Buffer, value: f64, decimal_places: int) {
 	f := value;
 	if f == 0 {
 		bprint_rune(buffer, '0');
@@ -159,16 +165,17 @@ print__f64 :: proc(buffer: ^[]byte, value: f64, decimal_places: int) {
 
 	bprint_rune(buffer, '.');
 
-	mult :f64 = 10.0;
-	for ; decimal_places >= 0; decimal_places-- {
+	mult: f64 = 10.0;
+	while decimal_places >= 0 {
 		i = (f * mult) as u64;
 		bprint_u64(buffer, i as u64);
 		f -= i as f64 / mult;
 		mult *= 10;
+		decimal_places -= 1;
 	}
 }
 
-bprint_type :: proc(buf: ^[]byte, ti: ^Type_Info) {
+bprint_type :: proc(buf: ^Buffer, ti: ^Type_Info) {
 	if ti == nil {
 		return;
 	}
@@ -224,7 +231,7 @@ bprint_type :: proc(buf: ^[]byte, ti: ^Type_Info) {
 	case Tuple:
 		count := info.fields.count;
 		if count != 1 { bprint_string(buf, "("); }
-		for i := 0; i < count; i++ {
+		for i : 0..<count {
 			if i > 0 { bprint_string(buf, ", "); }
 
 			f := info.fields[i];
@@ -257,37 +264,37 @@ bprint_type :: proc(buf: ^[]byte, ti: ^Type_Info) {
 		if info.packed  { bprint_string(buf, "#packed "); }
 		if info.ordered { bprint_string(buf, "#ordered "); }
 		bprint_string(buf, "{");
-		for i := 0; i < info.fields.count; i++ {
+		for field, i : info.fields {
 			if i > 0 {
 				bprint_string(buf, ", ");
 			}
-			bprint_any(buf, info.fields[i].name);
+			bprint_any(buf, field.name);
 			bprint_string(buf, ": ");
-			bprint_type(buf, info.fields[i].type_info);
+			bprint_type(buf, field.type_info);
 		}
 		bprint_string(buf, "}");
 
 	case Union:
 		bprint_string(buf, "union {");
-		for i := 0; i < info.fields.count; i++ {
+		for field, i : info.fields {
 			if i > 0 {
 				bprint_string(buf, ", ");
 			}
-			bprint_any(buf, info.fields[i].name);
+			bprint_any(buf, field.name);
 			bprint_string(buf, ": ");
-			bprint_type(buf, info.fields[i].type_info);
+			bprint_type(buf, field.type_info);
 		}
 		bprint_string(buf, "}");
 
 	case Raw_Union:
 		bprint_string(buf, "raw_union {");
-		for i := 0; i < info.fields.count; i++ {
+		for field, i : info.fields {
 			if i > 0 {
 				bprint_string(buf, ", ");
 			}
-			bprint_any(buf, info.fields[i].name);
+			bprint_any(buf, field.name);
 			bprint_string(buf, ": ");
-			bprint_type(buf, info.fields[i].type_info);
+			bprint_type(buf, field.type_info);
 		}
 		bprint_string(buf, "}");
 
@@ -307,7 +314,7 @@ make_any :: proc(type_info: ^Type_Info, data: rawptr) -> any {
 	return a;
 }
 
-bprint_any :: proc(buf: ^[]byte, arg: any) {
+bprint_any :: proc(buf: ^Buffer, arg: any) {
 	if arg.type_info == nil {
 		bprint_string(buf, "<nil>");
 		return;
@@ -326,8 +333,7 @@ bprint_any :: proc(buf: ^[]byte, arg: any) {
 		case Struct:
 			bprint_string(buf, info.name);
 			bprint_string(buf, "{");
-			for i := 0; i < b.fields.count; i++ {
-				f := b.fields[i];
+			for f, i : b.fields {
 				if i > 0 {
 					bprint_string(buf, ", ");
 				}
@@ -397,7 +403,7 @@ bprint_any :: proc(buf: ^[]byte, arg: any) {
 		bprintf(buf, "[%]%{", info.count, info.elem);
 		defer bprint_string(buf, "}");
 
-		for i := 0; i < info.count; i++ {
+		for i : 0..<info.count {
 			if i > 0 {
 				bprint_string(buf, ", ");
 			}
@@ -411,7 +417,7 @@ bprint_any :: proc(buf: ^[]byte, arg: any) {
 		bprintf(buf, "[]%{", info.elem);
 		defer bprint_string(buf, "}");
 
-		for i := 0; i < slice.count; i++ {
+		for i : 0..<slice.count {
 			if i > 0 {
 				bprint_string(buf, ", ");
 			}
@@ -438,7 +444,7 @@ bprint_any :: proc(buf: ^[]byte, arg: any) {
 			return;
 		}
 
-		for i := 0; i < info.count; i++ {
+		for i : 0..<info.count {
 			if i > 0 {
 				bprint_string(buf, ", ");
 			}
@@ -452,14 +458,14 @@ bprint_any :: proc(buf: ^[]byte, arg: any) {
 		bprintf(buf, "%{", arg.type_info);
 		defer bprint_string(buf, "}");
 
-		for i := 0; i < info.fields.count; i++ {
+		for f, i : info.fields {
 			if i > 0 {
 				bprint_string(buf, ", ");
 			}
-			bprint_string(buf, info.fields[i].name);
+			bprint_string(buf, f.name);
 			bprint_string(buf, " = ");
-			data := arg.data as ^byte + info.fields[i].offset;
-			ti := info.fields[i].type_info;
+			data := arg.data as ^byte + f.offset;
+			ti := f.type_info;
 			bprint_any(buf, make_any(ti, data));
 		}
 
@@ -479,7 +485,7 @@ bprint_any :: proc(buf: ^[]byte, arg: any) {
 }
 
 
-bprintf :: proc(buf: ^[]byte, fmt: string, args: ..any) -> int {
+bprintf :: proc(buf: ^Buffer, fmt: string, args: ...any) -> int {
 	is_digit :: proc(r: rune) -> bool #inline {
 		return '0' <= r && r <= '9';
 	}
@@ -487,7 +493,7 @@ bprintf :: proc(buf: ^[]byte, fmt: string, args: ..any) -> int {
 	parse_int :: proc(s: string, offset: int) -> (int, int) {
 		result := 0;
 
-		for ; offset < s.count; offset++ {
+		for _ : offset..<s.count {
 			c := s[offset] as rune;
 			if !is_digit(c) {
 				break;
@@ -503,7 +509,7 @@ bprintf :: proc(buf: ^[]byte, fmt: string, args: ..any) -> int {
 	prev := 0;
 	implicit_index := 0;
 
-	for i := 0; i < fmt.count; i++ {
+	while i := 0; i < fmt.count { defer i += 1;
 		r := fmt[i] as rune;
 		index := implicit_index;
 
@@ -512,13 +518,13 @@ bprintf :: proc(buf: ^[]byte, fmt: string, args: ..any) -> int {
 		}
 
 		bprint_string(buf, fmt[prev:i]);
-		i++; // Skip %
+		i += 1; // Skip %
 		if i < fmt.count {
 			next := fmt[i] as rune;
 
 			if next == '%' {
 				bprint_string(buf, "%");
-				i++;
+				i += 1;
 				prev = i;
 				continue;
 			}
@@ -540,11 +546,11 @@ bprintf :: proc(buf: ^[]byte, fmt: string, args: ..any) -> int {
 	}
 
 	bprint_string(buf, fmt[prev:]);
-	return buf.count;
+	return buf.length;
 }
 
 
-bprint :: proc(buf: ^[]byte, args: ..any) -> int {
+bprint :: proc(buf: ^Buffer, args: ...any) -> int {
 	is_type_string :: proc(info: ^Type_Info) -> bool {
 		using Type_Info;
 		if info == nil {
@@ -560,8 +566,7 @@ bprint :: proc(buf: ^[]byte, args: ..any) -> int {
 
 
 	prev_string := false;
-	for i := 0; i < args.count; i++ {
-		arg := args[i];
+	for arg, i : args {
 		is_string := arg.data != nil && is_type_string(arg.type_info);
 		if i > 0 && !is_string && !prev_string {
 			bprint_space(buf);
@@ -569,16 +574,16 @@ bprint :: proc(buf: ^[]byte, args: ..any) -> int {
 		bprint_any(buf, arg);
 		prev_string = is_string;
 	}
-	return buf.count;
+	return buf.length;
 }
 
-bprintln :: proc(buf: ^[]byte, args: ..any) -> int {
-	for i := 0; i < args.count; i++ {
+bprintln :: proc(buf: ^Buffer, args: ...any) -> int {
+	for arg, i : args {
 		if i > 0 {
-			append(buf, ' ');
+			bprint_space(buf);
 		}
-		bprint_any(buf, args[i]);
+		bprint_any(buf, arg);
 	}
 	bprint_nl(buf);
-	return buf.count;
+	return buf.length;
 }

core/hash.odin

@@ -1,7 +1,7 @@
 crc32 :: proc(data: rawptr, len: int) -> u32 {
 	result := ~(0 as u32);
 	s := slice_ptr(data as ^u8, len);
-	for i := 0; i < len; i++ {
+	for i : 0..<len {
 		b := s[i] as u32;
 		result = result>>8 ~ __CRC32_TABLE[(result ~ b) & 0xff];
 	}
@@ -10,7 +10,7 @@ crc32 :: proc(data: rawptr, len: int) -> u32 {
 crc64 :: proc(data: rawptr, len: int) -> u64 {
 	result := ~(0 as u64);
 	s := slice_ptr(data as ^u8, len);
-	for i := 0; i < len; i++ {
+	for i : 0..<len {
 		b := s[i] as u64;
 		result = result>>8 ~ __CRC64_TABLE[(result ~ b) & 0xff];
 	}
@@ -20,8 +20,8 @@ crc64 :: proc(data: rawptr, len: int) -> u64 {
 fnv32 :: proc(data: rawptr, len: int) -> u32 {
 	s := slice_ptr(data as ^u8, len);
 
-	h :u32 = 0x811c9dc5;
-	for i := 0; i < len; i++ {
+	h: u32 = 0x811c9dc5;
+	for i : 0..<len {
 		h = (h * 0x01000193) ~ s[i] as u32;
 	}
 	return h;
@@ -30,8 +30,8 @@ fnv32 :: proc(data: rawptr, len: int) -> u32 {
 fnv64 :: proc(data: rawptr, len: int) -> u64 {
 	s := slice_ptr(data as ^u8, len);
 
-	h :u64 = 0xcbf29ce484222325;
-	for i := 0; i < len; i++ {
+	h: u64 = 0xcbf29ce484222325;
+	for i : 0..<len {
 		h = (h * 0x100000001b3) ~ s[i] as u64;
 	}
 	return h;
@@ -40,8 +40,8 @@ fnv64 :: proc(data: rawptr, len: int) -> u64 {
 fnv32a :: proc(data: rawptr, len: int) -> u32 {
 	s := slice_ptr(data as ^u8, len);
 
-	h :u32 = 0x811c9dc5;
-	for i := 0; i < len; i++ {
+	h: u32 = 0x811c9dc5;
+	for i : 0..<len {
 		h = (h ~ s[i] as u32) * 0x01000193;
 	}
 	return h;
@@ -51,7 +51,7 @@ fnv64a :: proc(data: rawptr, len: int) -> u64 {
 	s := slice_ptr(data as ^u8, len);
 
 	h :u64 = 0xcbf29ce484222325;
-	for i := 0; i < len; i++ {
+	for i : 0..<len {
 		h = (h ~ s[i] as u64) * 0x100000001b3;
 	}
 	return h;
@@ -70,7 +70,7 @@ murmur64 :: proc(data_: rawptr, len: int) -> u64 {
 		data := slice_ptr(data_ as ^u64, len/size_of(u64));
 		data2 := slice_ptr(data_ as ^u8, len);
 
-		for i := 0; i < data.count; i++ {
+		for i : 0 ..< data.count {
 			k := data[i];
 
 			k *= m;
@@ -108,9 +108,9 @@ murmur64 :: proc(data_: rawptr, len: int) -> u64 {
 		data := slice_ptr(data_ as ^u32, len/size_of(u32));
 
 		i := 0;
-		for len >= 8 {
+		while len >= 8 {
 			k1, k2: u32;
-			k1 = data[i]; i++;
+			k1 = data[i]; i += 1;
 			k1 *= m;
 			k1 ~= k1>>r;
 			k1 *= m;
@@ -118,7 +118,7 @@ murmur64 :: proc(data_: rawptr, len: int) -> u64 {
 			h1 ~= k1;
 			len -= 4;
 
-			k2 = data[i]; i++;
+			k2 = data[i]; i += 1;
 			k2 *= m;
 			k2 ~= k2>>r;
 			k2 *= m;
@@ -127,9 +127,9 @@ murmur64 :: proc(data_: rawptr, len: int) -> u64 {
 			len -= 4;
 		}
 
-		if (len >= 4) {
+		if len >= 4 {
 			k1: u32;
-			k1 = data[i]; i++;
+			k1 = data[i]; i += 1;
 			k1 *= m;
 			k1 ~= k1>>r;
 			k1 *= m;

core/math.odin

@@ -145,8 +145,8 @@ mat4_identity :: proc() -> Mat4 {
 }
 
 mat4_transpose :: proc(m: Mat4) -> Mat4 {
-	for j := 0; j < 4; j++ {
-		for i := 0; i < 4; i++ {
+	for j : 0..<4 {
+		for i : 0..<4 {
 			m[i][j], m[j][i] = m[j][i], m[i][j];
 		}
 	}
@@ -155,8 +155,8 @@ mat4_transpose :: proc(m: Mat4) -> Mat4 {
 
 mat4_mul :: proc(a, b: Mat4) -> Mat4 {
 	c: Mat4;
-	for j := 0; j < 4; j++ {
-		for i := 0; i < 4; i++ {
+	for j : 0..<4 {
+		for i : 0..<4 {
 			c[j][i] = a[0][i]*b[j][0] +
 			          a[1][i]*b[j][1] +
 			          a[2][i]*b[j][2] +

core/mem.odin

@@ -40,9 +40,9 @@ compare :: proc(dst, src: rawptr, n: int) -> int #link_name "__mem_compare" {
 	la := slice_ptr(^a[0] as ^int, fast);
 	lb := slice_ptr(^b[0] as ^int, fast);
 
-	for ; curr_block < fast; curr_block++ {
+	for _ : curr_block ..< fast {
 		if (la[curr_block] ~ lb[curr_block]) != 0 {
-			for pos := curr_block*size_of(int); pos < n; pos++ {
+			for pos : curr_block*size_of(int) ..< n {
 				if (a[pos] ~ b[pos]) != 0 {
 					return a[pos] as int - b[pos] as int;
 				}
@@ -51,7 +51,7 @@ compare :: proc(dst, src: rawptr, n: int) -> int #link_name "__mem_compare" {
 
 	}
 
-	for ; offset < n; offset++ {
+	for _ : offset ..< n {
 		if (a[offset] ~ b[offset]) != 0 {
 			return a[offset] as int - b[offset] as int;
 		}
@@ -96,13 +96,14 @@ allocation_header_fill :: proc(header: ^Allocation_Header, data: rawptr, size: i
 	header.size = size;
 	ptr := (header+1) as ^int;
 
-	for i := 0; ptr as rawptr < data; i++ {
+	while i := 0; ptr as rawptr < data {
 		(ptr+i)^ = -1;
+		i += 1;
 	}
 }
 allocation_header :: proc(data: rawptr) -> ^Allocation_Header {
 	p := data as ^int;
-	for (p-1)^ == -1 {
+	while (p-1)^ == -1 {
 		p = (p-1);
 	}
 	return (p as ^Allocation_Header)-1;
@@ -115,6 +116,7 @@ allocation_header :: proc(data: rawptr) -> ^Allocation_Header {
 // Custom allocators
 Arena :: struct {
 	backing:    Allocator;
+	offset:     int;
 	memory:     []byte;
 	temp_count: int;
 }
@@ -144,7 +146,8 @@ free_arena :: proc(using a: ^Arena) {
 	if backing.procedure != nil {
 		push_allocator backing {
 			free(memory.data);
-			memory = memory[0:0:0];
+			memory = memory[0:0];
+			offset = 0;
 		}
 	}
 }
@@ -166,15 +169,15 @@ arena_allocator_proc :: proc(allocator_data: rawptr, mode: Allocator_Mode,
 	case ALLOC:
 		total_size := size + alignment;
 
-		if arena.memory.count + total_size > arena.memory.capacity {
+		if arena.offset + total_size > arena.memory.count {
 			fmt.fprintln(os.stderr, "Arena out of memory");
 			return nil;
 		}
 
-		#no_bounds_check end := ^arena.memory[arena.memory.count];
+		#no_bounds_check end := ^arena.memory[arena.offset];
 
 		ptr := align_forward(end, alignment);
-		arena.memory.count += total_size;
+		arena.offset += total_size;
 		return zero(ptr, size);
 
 	case FREE:
@@ -182,7 +185,7 @@ arena_allocator_proc :: proc(allocator_data: rawptr, mode: Allocator_Mode,
 		// Use Arena_Temp_Memory if you want to free a block
 
 	case FREE_ALL:
-		arena.memory.count = 0;
+		arena.offset = 0;
 
 	case RESIZE:
 		return default_resize_align(old_memory, old_size, size, alignment);
@@ -195,7 +198,7 @@ begin_arena_temp_memory :: proc(a: ^Arena) -> Arena_Temp_Memory {
 	tmp: Arena_Temp_Memory;
 	tmp.arena = a;
 	tmp.original_count = a.memory.count;
-	a.temp_count++;
+	a.temp_count += 1;
 	return tmp;
 }
 
@@ -203,7 +206,7 @@ end_arena_temp_memory :: proc(using tmp: Arena_Temp_Memory) {
 	assert(arena.memory.count >= original_count);
 	assert(arena.temp_count > 0);
 	arena.memory.count = original_count;
-	arena.temp_count--;
+	arena.temp_count -= 1;
 }
 
 

core/os_windows.odin

@@ -222,7 +222,7 @@ read_entire_file :: proc(name: string) -> ([]byte, bool) {
 	single_read_length: i32;
 	total_read: i64;
 
-	for total_read < length {
+	while total_read < length {
 		remaining := length - total_read;
 		to_read: u32;
 		MAX :: 1<<32-1;

core/sync.odin

@@ -52,7 +52,7 @@ mutex_lock :: proc(m: ^Mutex) {
 		}
 	}
 	atomic.store32(^m.owner, thread_id);
-	m.recursion++;
+	m.recursion += 1;
 }
 mutex_try_lock :: proc(m: ^Mutex) -> bool {
 	thread_id := current_thread_id();
@@ -68,7 +68,7 @@ mutex_try_lock :: proc(m: ^Mutex) -> bool {
 		}
 		atomic.store32(^m.owner, thread_id);
 	}
-	m.recursion++;
+	m.recursion += 1;
 	return true;
 }
 mutex_unlock :: proc(m: ^Mutex) {
@@ -76,7 +76,7 @@ mutex_unlock :: proc(m: ^Mutex) {
 	thread_id := current_thread_id();
 	assert(thread_id == atomic.load32(^m.owner));
 
-	m.recursion--;
+	m.recursion -= 1;
 	recursion = m.recursion;
 	if recursion == 0 {
 		atomic.store32(^m.owner, thread_id);

core/utf8.odin

@@ -132,10 +132,11 @@ valid_rune :: proc(r: rune) -> bool {
 
 valid_string :: proc(s: string) -> bool {
 	n := s.count;
-	for i := 0; i < n; {
+	i := 0;
+	while i < n {
 		si := s[i];
 		if si < RUNE_SELF { // ascii
-			i++;
+			i += 1;
 			continue;
 		}
 		x := accept_sizes[si];
@@ -166,20 +167,22 @@ valid_string :: proc(s: string) -> bool {
 rune_count :: proc(s: string) -> int {
 	count := 0;
 	n := s.count;
-	for i := 0; i < n; count++ {
+	i := 0;
+	while i < n {
+		defer count += 1;
 		si := s[i];
 		if si < RUNE_SELF { // ascii
-			i++;
+			i += 1;
 			continue;
 		}
 		x := accept_sizes[si];
 		if x == 0xf1 {
-			i++;
+			i += 1;
 			continue;
 		}
 		size := (x & 7) as int;
 		if i+size > n {
-			i++;
+			i += 1;
 			continue;
 		}
 		ar := accept_ranges[x>>4];

src/checker/checker.c

@@ -132,7 +132,7 @@ typedef enum BuiltinProcId {
 	BuiltinProc_panic,
 
 	BuiltinProc_copy,
-	BuiltinProc_append,
+	// BuiltinProc_append,
 
 	BuiltinProc_swizzle,
 
@@ -175,7 +175,7 @@ gb_global BuiltinProc builtin_procs[BuiltinProc_Count] = {
 	{STR_LIT("panic"),            1, false, Expr_Stmt},
 
 	{STR_LIT("copy"),             2, false, Expr_Expr},
-	{STR_LIT("append"),           2, false, Expr_Expr},
+	// {STR_LIT("append"),           2, false, Expr_Expr},
 
 	{STR_LIT("swizzle"),          1, true,  Expr_Expr},
 

src/checker/entity.c

@@ -57,6 +57,7 @@ struct Entity {
 		struct {
 			i32  field_index;
 			i32  field_src_index;
+			bool is_immutable;
 		} Variable;
 		i32 TypeName;
 		struct {

src/checker/expr.c

@@ -965,9 +965,9 @@ void check_identifier(Checker *c, Operand *o, AstNode *n, Type *named_type) {
 		}
 	#else
 		o->mode = Addressing_Variable;
-		// if (e->Variable.is_let) {
-			// o->mode = Addressing_Value;
-		// }
+		if (e->Variable.is_immutable) {
+			o->mode = Addressing_Value;
+		}
 	#endif
 		break;
 
@@ -2967,6 +2967,7 @@ bool check_builtin_procedure(Checker *c, Operand *operand, AstNode *call, i32 id
 		operand->mode = Addressing_Value;
 	} break;
 
+	#if 0
 	case BuiltinProc_append: {
 		// append :: proc(x : ^[]Type, y : Type) -> bool
 		Type *x_type = NULL, *y_type = NULL;
@@ -3003,6 +3004,7 @@ bool check_builtin_procedure(Checker *c, Operand *operand, AstNode *call, i32 id
 		operand->type = t_bool; // Returns if it was successful
 		operand->mode = Addressing_Value;
 	} break;
+	#endif
 
 	case BuiltinProc_swizzle: {
 		// swizzle :: proc(v: {N}T, T...) -> {M}T
@@ -4342,9 +4344,6 @@ ExprKind check__expr_base(Checker *c, Operand *o, AstNode *node, Type *type_hint
 				if (o->mode == Addressing_Constant) {
 					max_count = o->value.value_string.len;
 				}
-				if (se->max != NULL) {
-					error_node(se->max, "Max (3rd) index not needed in substring expression");
-				}
 				o->type = t_string;
 			}
 			break;
@@ -4375,8 +4374,8 @@ ExprKind check__expr_base(Checker *c, Operand *o, AstNode *node, Type *type_hint
 
 		o->mode = Addressing_Value;
 
-		i64 indices[3] = {0};
-		AstNode *nodes[3] = {se->low, se->high, se->max};
+		i64 indices[2] = {0};
+		AstNode *nodes[2] = {se->low, se->high};
 		for (isize i = 0; i < gb_count_of(nodes); i++) {
 			i64 index = max_count;
 			if (nodes[i] != NULL) {
@@ -4680,10 +4679,6 @@ gbString write_expr_to_string(gbString str, AstNode *node) {
 		str = write_expr_to_string(str, se->low);
 		str = gb_string_appendc(str, ":");
 		str = write_expr_to_string(str, se->high);
-		if (se->triple_indexed) {
-			str = gb_string_appendc(str, ":");
-			str = write_expr_to_string(str, se->max);
-		}
 		str = gb_string_appendc(str, "]");
 	case_end;
 

src/checker/stmt.c

@@ -127,13 +127,13 @@ bool check_is_terminating(AstNode *node) {
 		}
 	case_end;
 
-	case_ast_node(fs, ForStmt, node);
-		if (fs->cond == NULL && !check_has_break(fs->body, true)) {
+	case_ast_node(ws, WhileStmt, node);
+		if (ws->cond == NULL && !check_has_break(ws->body, true)) {
 			return true;
 		}
 	case_end;
 
-	case_ast_node(rs, RangeStmt, node);
+	case_ast_node(rs, ForStmt, node);
 		if (!check_has_break(rs->body, true)) {
 			return true;
 		}
@@ -375,48 +375,6 @@ void check_stmt_internal(Checker *c, AstNode *node, u32 flags) {
 		check_stmt(c, ts->stmt, flags);
 	case_end;
 
-	case_ast_node(ids, IncDecStmt, node);
-		Token op = ids->op;
-		switch (ids->op.kind) {
-		case Token_Increment:
-			op.kind = Token_Add;
-			op.string.len = 1;
-			break;
-		case Token_Decrement:
-			op.kind = Token_Sub;
-			op.string.len = 1;
-			break;
-		default:
-			error(ids->op, "Unknown inc/dec operation %.*s", LIT(ids->op.string));
-			return;
-		}
-
-		Operand operand = {Addressing_Invalid};
-		check_expr(c, &operand, ids->expr);
-		if (operand.mode == Addressing_Invalid) {
-			return;
-		}
-		if (!is_type_numeric(operand.type) && !is_type_pointer(operand.type)) {
-			gbString type_str = type_to_string(operand.type);
-			error(ids->op, "Non numeric type `%s`", type_str);
-			gb_string_free(type_str);
-			return;
-		}
-
-		AstNode basic_lit = {AstNode_BasicLit};
-		ast_node(bl, BasicLit, &basic_lit);
-		*bl = ids->op;
-		bl->kind = Token_Integer;
-		bl->string = str_lit("1");
-
-		AstNode binary_expr = {AstNode_BinaryExpr};
-		ast_node(be, BinaryExpr, &binary_expr);
-		be->op = op;
-		be->left = ids->expr;
-		be->right = &basic_lit;
-		check_binary_expr(c, &operand, &binary_expr);
-	case_end;
-
 	case_ast_node(as, AssignStmt, node);
 		switch (as->op.kind) {
 		case Token_Eq: {
@@ -567,30 +525,27 @@ void check_stmt_internal(Checker *c, AstNode *node, u32 flags) {
 		}
 	case_end;
 
-	case_ast_node(fs, ForStmt, node);
+	case_ast_node(ws, WhileStmt, node);
 		u32 new_flags = mod_flags | Stmt_BreakAllowed | Stmt_ContinueAllowed;
 		check_open_scope(c, node);
 
-		if (fs->init != NULL) {
-			check_stmt(c, fs->init, 0);
+		if (ws->init != NULL) {
+			check_stmt(c, ws->init, 0);
 		}
-		if (fs->cond) {
+		if (ws->cond) {
 			Operand operand = {Addressing_Invalid};
-			check_expr(c, &operand, fs->cond);
+			check_expr(c, &operand, ws->cond);
 			if (operand.mode != Addressing_Invalid &&
 			    !is_type_boolean(operand.type)) {
-				error_node(fs->cond, "Non-boolean condition in `for` statement");
+				error_node(ws->cond, "Non-boolean condition in `while` statement");
 			}
 		}
-		if (fs->post != NULL) {
-			check_stmt(c, fs->post, 0);
-		}
-		check_stmt(c, fs->body, new_flags);
+		check_stmt(c, ws->body, new_flags);
 
 		check_close_scope(c);
 	case_end;
 
-	case_ast_node(rs, RangeStmt, node);
+	case_ast_node(rs, ForStmt, node);
 		u32 new_flags = mod_flags | Stmt_BreakAllowed | Stmt_ContinueAllowed;
 		check_open_scope(c, node);
 
@@ -646,8 +601,8 @@ void check_stmt_internal(Checker *c, AstNode *node, u32 flags) {
 				goto skip_expr;
 			}
 
-			if (!is_type_integer(x.type) && !is_type_float(x.type)) {
-				error(ie->op, "Only numerical types are allowed within interval expressions");
+			if (!is_type_integer(x.type) && !is_type_float(x.type) && !is_type_pointer(x.type)) {
+				error(ie->op, "Only numerical and pointer types are allowed within interval expressions");
 				goto skip_expr;
 			}
 
@@ -661,7 +616,7 @@ void check_stmt_internal(Checker *c, AstNode *node, u32 flags) {
 				bool ok = compare_exact_values(Token_Lt, a, b);
 				if (!ok) {
 					// TODO(bill): Better error message
-					error(ie->op, "Invalid interval expression");
+					error(ie->op, "Invalid interval range");
 					goto skip_expr;
 				}
 			}
@@ -723,6 +678,7 @@ void check_stmt_internal(Checker *c, AstNode *node, u32 flags) {
 				}
 				if (found == NULL) {
 					entity = make_entity_variable(c->allocator, c->context.scope, token, type);
+					entity->Variable.is_immutable = true;
 					add_entity_definition(&c->info, name, entity);
 				} else {
 					TokenPos pos = found->token.pos;
@@ -1051,12 +1007,12 @@ void check_stmt_internal(Checker *c, AstNode *node, u32 flags) {
 		switch (token.kind) {
 		case Token_break:
 			if ((flags & Stmt_BreakAllowed) == 0) {
-				error(token, "`break` only allowed in `for` or `match` statements");
+				error(token, "`break` only allowed in loops or `match` statements");
 			}
 			break;
 		case Token_continue:
 			if ((flags & Stmt_ContinueAllowed) == 0) {
-				error(token, "`continue` only allowed in `for` statements");
+				error(token, "`continue` only allowed in loops");
 			}
 			break;
 		case Token_fallthrough:

src/checker/types.c

@@ -116,6 +116,8 @@ typedef struct TypeRecord {
 		ProcCallingConvention calling_convention; \
 	})
 
+
+
 typedef enum TypeKind {
 	Type_Invalid,
 #define TYPE_KIND(k, ...) GB_JOIN2(Type_, k),
@@ -987,7 +989,6 @@ Selection lookup_field_with_selection(gbAllocator a, Type *type_, String field_n
 	} else if (type->kind == Type_Slice) {
 		String data_str     = str_lit("data");
 		String count_str    = str_lit("count");
-		String capacity_str = str_lit("capacity");
 
 		if (str_eq(field_name, data_str)) {
 			selection_add_index(&sel, 0);
@@ -1002,14 +1003,6 @@ Selection lookup_field_with_selection(gbAllocator a, Type *type_, String field_n
 
 			sel.entity = entity__slice_count;
 			return sel;
-		} else if (str_eq(field_name, capacity_str)) {
-			selection_add_index(&sel, 2);
-			if (entity__slice_capacity == NULL) {
-				entity__slice_capacity = make_entity_field(a, NULL, make_token_ident(capacity_str), t_int, false, 2);
-			}
-
-			sel.entity = entity__slice_capacity;
-			return sel;
 		}
 	}
 
@@ -1393,8 +1386,8 @@ i64 type_size_of_internal(BaseTypeSizes s, gbAllocator allocator, Type *t, TypeP
 	} break;
 
 
-	case Type_Slice: // ptr + len + cap
-		return 3 * s.word_size;
+	case Type_Slice: // ptr + count
+		return 2 * s.word_size;
 
 	case Type_Maybe: { // value + bool
 		i64 align, size;

src/parser.c

@@ -140,8 +140,7 @@ AST_NODE_KIND(_ExprBegin,  "",  i32) \
 	AST_NODE_KIND(SliceExpr, "slice expression", struct { \
 		AstNode *expr; \
 		Token open, close; \
-		AstNode *low, *high, *max; \
-		bool triple_indexed; \
+		AstNode *low, *high; \
 	}) \
 	AST_NODE_KIND(FieldValue, "field value", struct { Token eq; AstNode *field, *value; }) \
 	AST_NODE_KIND(BlockExpr, "block expr", struct { \
@@ -166,7 +165,6 @@ AST_NODE_KIND(_StmtBegin,     "", i32) \
 	AST_NODE_KIND(BadStmt,    "bad statement",                 struct { Token begin, end; }) \
 	AST_NODE_KIND(EmptyStmt,  "empty statement",               struct { Token token; }) \
 	AST_NODE_KIND(ExprStmt,   "expression statement",          struct { AstNode *expr; } ) \
-	AST_NODE_KIND(IncDecStmt, "increment/decrement statement", struct { Token op; AstNode *expr; }) \
 	AST_NODE_KIND(TagStmt,    "tag statement", struct { \
 		Token token; \
 		Token name; \
@@ -198,14 +196,13 @@ AST_NODE_KIND(_ComplexStmtBegin, "", i32) \
 		Token token; \
 		AstNodeArray results; \
 	}) \
-	AST_NODE_KIND(ForStmt, "for statement", struct { \
+	AST_NODE_KIND(WhileStmt, "while statement", struct { \
 		Token    token; \
 		AstNode *init; \
 		AstNode *cond; \
-		AstNode *post; \
 		AstNode *body; \
 	}) \
-	AST_NODE_KIND(RangeStmt, "range statement", struct { \
+	AST_NODE_KIND(ForStmt, "range statement", struct { \
 		Token    token; \
 		AstNode *value; \
 		AstNode *index; \
@@ -463,8 +460,6 @@ Token ast_node_token(AstNode *node) {
 		return ast_node_token(node->ExprStmt.expr);
 	case AstNode_TagStmt:
 		return node->TagStmt.token;
-	case AstNode_IncDecStmt:
-		return node->IncDecStmt.op;
 	case AstNode_AssignStmt:
 		return node->AssignStmt.op;
 	case AstNode_BlockStmt:
@@ -475,8 +470,8 @@ Token ast_node_token(AstNode *node) {
 		return node->WhenStmt.token;
 	case AstNode_ReturnStmt:
 		return node->ReturnStmt.token;
-	case AstNode_ForStmt:
-		return node->ForStmt.token;
+	case AstNode_WhileStmt:
+		return node->WhileStmt.token;
 	case AstNode_MatchStmt:
 		return node->MatchStmt.token;
 	case AstNode_CaseClause:
@@ -677,15 +672,13 @@ AstNode *make_index_expr(AstFile *f, AstNode *expr, AstNode *index, Token open,
 }
 
 
-AstNode *make_slice_expr(AstFile *f, AstNode *expr, Token open, Token close, AstNode *low, AstNode *high, AstNode *max, bool triple_indexed) {
+AstNode *make_slice_expr(AstFile *f, AstNode *expr, Token open, Token close, AstNode *low, AstNode *high) {
 	AstNode *result = make_node(f, AstNode_SliceExpr);
 	result->SliceExpr.expr = expr;
 	result->SliceExpr.open = open;
 	result->SliceExpr.close = close;
 	result->SliceExpr.low = low;
 	result->SliceExpr.high = high;
-	result->SliceExpr.max = max;
-	result->SliceExpr.triple_indexed = triple_indexed;
 	return result;
 }
 
@@ -810,13 +803,6 @@ AstNode *make_expr_stmt(AstFile *f, AstNode *expr) {
 	return result;
 }
 
-AstNode *make_inc_dec_stmt(AstFile *f, Token op, AstNode *expr) {
-	AstNode *result = make_node(f, AstNode_IncDecStmt);
-	result->IncDecStmt.op = op;
-	result->IncDecStmt.expr = expr;
-	return result;
-}
-
 AstNode *make_assign_stmt(AstFile *f, Token op, AstNodeArray lhs, AstNodeArray rhs) {
 	AstNode *result = make_node(f, AstNode_AssignStmt);
 	result->AssignStmt.op = op;
@@ -860,22 +846,21 @@ AstNode *make_return_stmt(AstFile *f, Token token, AstNodeArray results) {
 	return result;
 }
 
-AstNode *make_for_stmt(AstFile *f, Token token, AstNode *init, AstNode *cond, AstNode *post, AstNode *body) {
-	AstNode *result = make_node(f, AstNode_ForStmt);
-	result->ForStmt.token = token;
-	result->ForStmt.init  = init;
-	result->ForStmt.cond  = cond;
-	result->ForStmt.post  = post;
-	result->ForStmt.body  = body;
+AstNode *make_while_stmt(AstFile *f, Token token, AstNode *init, AstNode *cond, AstNode *body) {
+	AstNode *result = make_node(f, AstNode_WhileStmt);
+	result->WhileStmt.token = token;
+	result->WhileStmt.init  = init;
+	result->WhileStmt.cond  = cond;
+	result->WhileStmt.body  = body;
 	return result;
 }
-AstNode *make_range_stmt(AstFile *f, Token token, AstNode *value, AstNode *index, AstNode *expr, AstNode *body) {
-	AstNode *result = make_node(f, AstNode_RangeStmt);
-	result->RangeStmt.token = token;
-	result->RangeStmt.value = value;
-	result->RangeStmt.index = index;
-	result->RangeStmt.expr  = expr;
-	result->RangeStmt.body  = body;
+AstNode *make_for_stmt(AstFile *f, Token token, AstNode *value, AstNode *index, AstNode *expr, AstNode *body) {
+	AstNode *result = make_node(f, AstNode_ForStmt);
+	result->ForStmt.token = token;
+	result->ForStmt.value = value;
+	result->ForStmt.index = index;
+	result->ForStmt.expr  = expr;
+	result->ForStmt.body  = body;
 	return result;
 }
 
@@ -1224,7 +1209,7 @@ void fix_advance_to_next_stmt(AstFile *f) {
 		case Token_if:
 		case Token_when:
 		case Token_return:
-		case Token_for:
+		case Token_while:
 		case Token_range:
 		case Token_match:
 		case Token_defer:
@@ -1908,7 +1893,7 @@ AstNode *parse_atom_expr(AstFile *f, bool lhs) {
 			isize colon_count = 0;
 			Token colons[2] = {0};
 
-			while (f->curr_token.kind == Token_Colon && colon_count < 2) {
+			while (f->curr_token.kind == Token_Colon && colon_count < 1) {
 				colons[colon_count++] = f->curr_token;
 				next_token(f);
 				if (f->curr_token.kind != Token_Colon &&
@@ -1924,19 +1909,7 @@ AstNode *parse_atom_expr(AstFile *f, bool lhs) {
 			if (colon_count == 0) {
 				operand = make_index_expr(f, operand, indices[0], open, close);
 			} else {
-				bool triple_indexed = false;
-				if (colon_count == 2) {
-					triple_indexed = true;
-					if (indices[1] == NULL) {
-						syntax_error(colons[0], "Second index is required in a triple indexed slice");
-						indices[1] = make_bad_expr(f, colons[0], colons[1]);
-					}
-					if (indices[2] == NULL) {
-						syntax_error(colons[1], "Third index is required in a triple indexed slice");
-						indices[2] = make_bad_expr(f, colons[1], close);
-					}
-				}
-				operand = make_slice_expr(f, operand, open, close, indices[0], indices[1], indices[2], triple_indexed);
+				operand = make_slice_expr(f, operand, open, close, indices[0], indices[1]);
 			}
 		} break;
 
@@ -2239,19 +2212,6 @@ AstNode *parse_simple_stmt(AstFile *f) {
 		return make_bad_stmt(f, token, f->curr_token);
 	}
 
-	token = f->curr_token;
-	switch (token.kind) {
-	case Token_Increment:
-	case Token_Decrement:
-		if (f->curr_proc == NULL) {
-			syntax_error(f->curr_token, "You cannot use a simple statement in the file scope");
-			return make_bad_stmt(f, f->curr_token, f->curr_token);
-		}
-		AstNode *stmt = make_inc_dec_stmt(f, token, lhs.e[0]);
-		next_token(f);
-		return stmt;
-	}
-
 	return make_expr_stmt(f, lhs.e[0]);
 }
 
@@ -2748,6 +2708,41 @@ AstNode *parse_give_stmt(AstFile *f) {
 	return make_expr_stmt(f, ge);
 }
 
+AstNode *parse_while_stmt(AstFile *f) {
+	if (f->curr_proc == NULL) {
+		syntax_error(f->curr_token, "You cannot use a while statement in the file scope");
+		return make_bad_stmt(f, f->curr_token, f->curr_token);
+	}
+
+	Token token = expect_token(f, Token_while);
+
+	AstNode *init = NULL;
+	AstNode *cond = NULL;
+	AstNode *body = NULL;
+
+	isize prev_level = f->expr_level;
+	f->expr_level = -1;
+
+
+	cond = parse_simple_stmt(f);
+	if (is_ast_node_complex_stmt(cond)) {
+		syntax_error(f->curr_token, "You are not allowed that type of statement in a while statement, it is too complex!");
+	}
+
+	if (allow_token(f, Token_Semicolon)) {
+		init = cond;
+		cond = parse_simple_stmt(f);
+	}
+	f->expr_level = prev_level;
+
+	body = parse_block_stmt(f, false);
+
+	cond = convert_stmt_to_expr(f, cond, str_lit("boolean expression"));
+
+	return make_while_stmt(f, token, init, cond, body);
+}
+
+
 AstNode *parse_for_stmt(AstFile *f) {
 	if (f->curr_proc == NULL) {
 		syntax_error(f->curr_token, "You cannot use a for statement in the file scope");
@@ -2755,53 +2750,9 @@ AstNode *parse_for_stmt(AstFile *f) {
 	}
 
 	Token token = expect_token(f, Token_for);
-
-	AstNode *init = NULL;
-	AstNode *cond = NULL;
-	AstNode *end  = NULL;
-	AstNode *body = NULL;
-
-	if (f->curr_token.kind != Token_OpenBrace) {
-		isize prev_level = f->expr_level;
-		f->expr_level = -1;
-		if (f->curr_token.kind != Token_Semicolon) {
-			cond = parse_simple_stmt(f);
-			if (is_ast_node_complex_stmt(cond)) {
-				syntax_error(f->curr_token, "You are not allowed that type of statement in a for statement, it is too complex!");
-			}
-		}
-
-		if (allow_token(f, Token_Semicolon)) {
-			init = cond;
-			cond = NULL;
-			if (f->curr_token.kind != Token_Semicolon) {
-				cond = parse_simple_stmt(f);
-			}
-			expect_token(f, Token_Semicolon);
-			if (f->curr_token.kind != Token_OpenBrace) {
-				end = parse_simple_stmt(f);
-			}
-		}
-		f->expr_level = prev_level;
-	}
-	body = parse_block_stmt(f, false);
-
-	cond = convert_stmt_to_expr(f, cond, str_lit("boolean expression"));
-
-	return make_for_stmt(f, token, init, cond, end, body);
-}
-
-
-AstNode *parse_range_stmt(AstFile *f) {
-	if (f->curr_proc == NULL) {
-		syntax_error(f->curr_token, "You cannot use a range statement in the file scope");
-		return make_bad_stmt(f, f->curr_token, f->curr_token);
-	}
-
-	Token token = expect_token(f, Token_range);
 	AstNodeArray names = parse_identifier_list(f);
 	parse_check_name_list_for_reserves(f, names);
-	Token colon = expect_token_after(f, Token_Colon, "range name list");
+	Token colon = expect_token_after(f, Token_Colon, "for name list");
 
 	isize prev_level = f->expr_level;
 	f->expr_level = -1;
@@ -2830,7 +2781,7 @@ AstNode *parse_range_stmt(AstFile *f) {
 		return make_bad_stmt(f, token, f->curr_token);
 	}
 
-	return make_range_stmt(f, token, value, index, expr, body);
+	return make_for_stmt(f, token, value, index, expr, body);
 }
 
 AstNode *parse_case_clause(AstFile *f) {
@@ -3009,8 +2960,8 @@ AstNode *parse_stmt(AstFile *f) {
 
 	case Token_if:     return parse_if_stmt(f);
 	case Token_when:   return parse_when_stmt(f);
+	case Token_while:  return parse_while_stmt(f);
 	case Token_for:    return parse_for_stmt(f);
-	case Token_range:  return parse_range_stmt(f);
 	case Token_match:  return parse_match_stmt(f);
 	case Token_defer:  return parse_defer_stmt(f);
 	case Token_asm:    return parse_asm_stmt(f);

src/ssa.c

@@ -234,7 +234,6 @@ struct ssaProcedure {
 		TokenPos  pos; \
 		ssaValue *low; \
 		ssaValue *high; \
-		ssaValue *max; \
 		bool      is_substring; \
 	})
 
@@ -1016,12 +1015,11 @@ ssaValue *ssa_make_instr_bounds_check(ssaProcedure *p, TokenPos pos, ssaValue *i
 	v->Instr.BoundsCheck.len   = len;
 	return v;
 }
-ssaValue *ssa_make_instr_slice_bounds_check(ssaProcedure *p, TokenPos pos, ssaValue *low, ssaValue *high, ssaValue *max, bool is_substring) {
+ssaValue *ssa_make_instr_slice_bounds_check(ssaProcedure *p, TokenPos pos, ssaValue *low, ssaValue *high, bool is_substring) {
 	ssaValue *v = ssa_alloc_instr(p, ssaInstr_SliceBoundsCheck);
 	v->Instr.SliceBoundsCheck.pos  = pos;
 	v->Instr.SliceBoundsCheck.low  = low;
 	v->Instr.SliceBoundsCheck.high = high;
-	v->Instr.SliceBoundsCheck.max  = max;
 	v->Instr.SliceBoundsCheck.is_substring = is_substring;
 	return v;
 }
@@ -1794,11 +1792,6 @@ ssaValue *ssa_slice_len(ssaProcedure *proc, ssaValue *slice) {
 	GB_ASSERT(t->kind == Type_Slice);
 	return ssa_emit_struct_ev(proc, slice, 1);
 }
-ssaValue *ssa_slice_cap(ssaProcedure *proc, ssaValue *slice) {
-	Type *t = ssa_type(slice);
-	GB_ASSERT(t->kind == Type_Slice);
-	return ssa_emit_struct_ev(proc, slice, 2);
-}
 
 ssaValue *ssa_string_elem(ssaProcedure *proc, ssaValue *string) {
 	Type *t = ssa_type(string);
@@ -1813,7 +1806,7 @@ ssaValue *ssa_string_len(ssaProcedure *proc, ssaValue *string) {
 
 
 
-ssaValue *ssa_add_local_slice(ssaProcedure *proc, Type *slice_type, ssaValue *base, ssaValue *low, ssaValue *high, ssaValue *max) {
+ssaValue *ssa_add_local_slice(ssaProcedure *proc, Type *slice_type, ssaValue *base, ssaValue *low, ssaValue *high) {
 	// TODO(bill): array bounds checking for slice creation
 	// TODO(bill): check that low < high <= max
 	gbAllocator a = proc->module->allocator;
@@ -1829,17 +1822,8 @@ ssaValue *ssa_add_local_slice(ssaProcedure *proc, Type *slice_type, ssaValue *ba
 		case Type_Pointer: high = v_one;                     break;
 		}
 	}
-	if (max == NULL) {
-		switch (bt->kind) {
-		case Type_Array:   max = ssa_array_cap(proc, base); break;
-		case Type_Slice:   max = ssa_slice_cap(proc, base); break;
-		case Type_Pointer: max = high;                      break;
-		}
-	}
-	GB_ASSERT(max != NULL);
 
 	ssaValue *len = ssa_emit_arith(proc, Token_Sub, high, low, t_int);
-	ssaValue *cap = ssa_emit_arith(proc, Token_Sub, max,  low, t_int);
 
 	ssaValue *elem = NULL;
 	switch (bt->kind) {
@@ -1859,9 +1843,6 @@ ssaValue *ssa_add_local_slice(ssaProcedure *proc, Type *slice_type, ssaValue *ba
 	gep = ssa_emit_struct_ep(proc, slice, 1);
 	ssa_emit_store(proc, gep, len);
 
-	gep = ssa_emit_struct_ep(proc, slice, 2);
-	ssa_emit_store(proc, gep, cap);
-
 	return slice;
 }
 
@@ -2103,7 +2084,7 @@ ssaValue *ssa_emit_conv(ssaProcedure *proc, ssaValue *value, Type *t) {
 		ssa_emit_store(proc, elem_ptr, elem);
 
 		ssaValue *len  = ssa_string_len(proc, value);
-		ssaValue *slice = ssa_add_local_slice(proc, dst, elem_ptr, v_zero, len, len);
+		ssaValue *slice = ssa_add_local_slice(proc, dst, elem_ptr, v_zero, len);
 		return ssa_emit_load(proc, slice);
 	}
 
@@ -2463,16 +2444,15 @@ void ssa_emit_bounds_check(ssaProcedure *proc, Token token, ssaValue *index, ssa
 	// ssa_emit_global_call(proc, "__bounds_check_error", args, 5);
 }
 
-void ssa_emit_slice_bounds_check(ssaProcedure *proc, Token token, ssaValue *low, ssaValue *high, ssaValue *max, bool is_substring) {
+void ssa_emit_slice_bounds_check(ssaProcedure *proc, Token token, ssaValue *low, ssaValue *high, bool is_substring) {
 	if ((proc->module->stmt_state_flags & StmtStateFlag_no_bounds_check) != 0) {
 		return;
 	}
 
 	low  = ssa_emit_conv(proc, low,  t_int);
 	high = ssa_emit_conv(proc, high, t_int);
-	max  = ssa_emit_conv(proc, max,  t_int);
 
-	ssa_emit(proc, ssa_make_instr_slice_bounds_check(proc, token.pos, low, high, max, is_substring));
+	ssa_emit(proc, ssa_make_instr_slice_bounds_check(proc, token.pos, low, high, is_substring));
 }
 
 
@@ -2886,7 +2866,7 @@ ssaValue *ssa_build_single_expr(ssaProcedure *proc, AstNode *expr, TypeAndValue
 						cap = ssa_emit_conv(proc, ssa_build_expr(proc, ce->args.e[2]), t_int);
 					}
 
-					ssa_emit_slice_bounds_check(proc, ast_node_token(ce->args.e[1]), v_zero, len, cap, false);
+					ssa_emit_slice_bounds_check(proc, ast_node_token(ce->args.e[1]), v_zero, len, false);
 
 					ssaValue *slice_size = ssa_emit_arith(proc, Token_Mul, elem_size, cap, t_int);
 
@@ -2995,6 +2975,7 @@ ssaValue *ssa_build_single_expr(ssaProcedure *proc, AstNode *expr, TypeAndValue
 
 					return len;
 				} break;
+				#if 0
 				case BuiltinProc_append: {
 					ssa_emit_comment(proc, str_lit("append"));
 					// append :: proc(s: ^[]Type, item: Type) -> bool
@@ -3051,6 +3032,7 @@ ssaValue *ssa_build_single_expr(ssaProcedure *proc, AstNode *expr, TypeAndValue
 
 					return ssa_emit_conv(proc, cond, t_bool);
 				} break;
+				#endif
 
 				case BuiltinProc_swizzle: {
 					ssa_emit_comment(proc, str_lit("swizzle"));
@@ -3533,11 +3515,9 @@ ssaAddr ssa_build_addr(ssaProcedure *proc, AstNode *expr) {
 		gbAllocator a = proc->module->allocator;
 		ssaValue *low  = v_zero;
 		ssaValue *high = NULL;
-		ssaValue *max  = NULL;
 
 		if (se->low  != NULL)    low  = ssa_build_expr(proc, se->low);
 		if (se->high != NULL)    high = ssa_build_expr(proc, se->high);
-		if (se->triple_indexed)  max  = ssa_build_expr(proc, se->max);
 		ssaValue *addr = ssa_build_addr(proc, se->expr).addr;
 		ssaValue *base = ssa_emit_load(proc, addr);
 		Type *type = base_type(ssa_type(base));
@@ -3555,22 +3535,17 @@ ssaAddr ssa_build_addr(ssaProcedure *proc, AstNode *expr) {
 			Type *slice_type = type;
 
 			if (high == NULL) high = ssa_slice_len(proc, base);
-			if (max == NULL)  max  = ssa_slice_cap(proc, base);
-			GB_ASSERT(max != NULL);
 
-			ssa_emit_slice_bounds_check(proc, se->open, low, high, max, false);
+			ssa_emit_slice_bounds_check(proc, se->open, low, high, false);
 
 			ssaValue *elem  = ssa_emit_ptr_offset(proc, ssa_slice_elem(proc, base), low);
 			ssaValue *len   = ssa_emit_arith(proc, Token_Sub, high, low, t_int);
-			ssaValue *cap   = ssa_emit_arith(proc, Token_Sub, max,  low, t_int);
 			ssaValue *slice = ssa_add_local_generated(proc, slice_type);
 
 			ssaValue *gep0 = ssa_emit_struct_ep(proc, slice, 0);
 			ssaValue *gep1 = ssa_emit_struct_ep(proc, slice, 1);
-			ssaValue *gep2 = ssa_emit_struct_ep(proc, slice, 2);
 			ssa_emit_store(proc, gep0, elem);
 			ssa_emit_store(proc, gep1, len);
-			ssa_emit_store(proc, gep2, cap);
 
 			return ssa_make_addr(slice, expr);
 		}
@@ -3579,22 +3554,17 @@ ssaAddr ssa_build_addr(ssaProcedure *proc, AstNode *expr) {
 			Type *slice_type = make_type_slice(a, type->Array.elem);
 
 			if (high == NULL) high = ssa_array_len(proc, base);
-			if (max == NULL)  max  = ssa_array_cap(proc, base);
-			GB_ASSERT(max != NULL);
 
-			ssa_emit_slice_bounds_check(proc, se->open, low, high, max, false);
+			ssa_emit_slice_bounds_check(proc, se->open, low, high, false);
 
 			ssaValue *elem = ssa_emit_ptr_offset(proc, ssa_array_elem(proc, addr), low);
 			ssaValue *len  = ssa_emit_arith(proc, Token_Sub, high, low, t_int);
-			ssaValue *cap  = ssa_emit_arith(proc, Token_Sub, max,  low, t_int);
 			ssaValue *slice = ssa_add_local_generated(proc, slice_type);
 
 			ssaValue *gep0 = ssa_emit_struct_ep(proc, slice, 0);
 			ssaValue *gep1 = ssa_emit_struct_ep(proc, slice, 1);
-			ssaValue *gep2 = ssa_emit_struct_ep(proc, slice, 2);
 			ssa_emit_store(proc, gep0, elem);
 			ssa_emit_store(proc, gep1, len);
-			ssa_emit_store(proc, gep2, cap);
 
 			return ssa_make_addr(slice, expr);
 		}
@@ -3605,7 +3575,7 @@ ssaAddr ssa_build_addr(ssaProcedure *proc, AstNode *expr) {
 				high = ssa_string_len(proc, base);
 			}
 
-			ssa_emit_slice_bounds_check(proc, se->open, low, high, high, true);
+			ssa_emit_slice_bounds_check(proc, se->open, low, high, true);
 
 			ssaValue *elem, *len;
 			len = ssa_emit_arith(proc, Token_Sub, high, low, t_int);
@@ -4249,20 +4219,6 @@ void ssa_build_stmt_internal(ssaProcedure *proc, AstNode *node) {
 		}
 	case_end;
 
-	case_ast_node(ids, IncDecStmt, node);
-		ssa_emit_comment(proc, str_lit("IncDecStmt"));
-		TokenKind op = ids->op.kind;
-		if (op == Token_Increment) {
-			op = Token_Add;
-		} else if (op == Token_Decrement) {
-			op = Token_Sub;
-		}
-		ssaAddr lval = ssa_build_addr(proc, ids->expr);
-		ssaValue *one = ssa_emit_conv(proc, v_one, ssa_addr_type(lval));
-		ssa_build_assign_op(proc, lval, one, op);
-
-	case_end;
-
 	case_ast_node(as, AssignStmt, node);
 		ssa_emit_comment(proc, str_lit("AssignStmt"));
 
@@ -4444,56 +4400,44 @@ void ssa_build_stmt_internal(ssaProcedure *proc, AstNode *node) {
 		proc->curr_block = done;
 	case_end;
 
-	case_ast_node(fs, ForStmt, node);
-		ssa_emit_comment(proc, str_lit("ForStmt"));
-		if (fs->init != NULL) {
-			ssaBlock *init = ssa_add_block(proc, node, "for.init");
+	case_ast_node(ws, WhileStmt, node);
+		ssa_emit_comment(proc, str_lit("WhileStmt"));
+		if (ws->init != NULL) {
+			ssaBlock *init = ssa_add_block(proc, node, "while.init");
 			ssa_emit_jump(proc, init);
 			proc->curr_block = init;
-			ssa_build_stmt(proc, fs->init);
+			ssa_build_stmt(proc, ws->init);
 		}
-		ssaBlock *body = ssa_add_block(proc, node, "for.body");
-		ssaBlock *done = ssa_add_block(proc, node, "for.done"); // NOTE(bill): Append later
+		ssaBlock *body = ssa_add_block(proc, node, "while.body");
+		ssaBlock *done = ssa_add_block(proc, node, "while.done"); // NOTE(bill): Append later
 
 		ssaBlock *loop = body;
 
-		if (fs->cond != NULL) {
-			loop = ssa_add_block(proc, node, "for.loop");
-		}
-		ssaBlock *cont = loop;
-		if (fs->post != NULL) {
-			cont = ssa_add_block(proc, node, "for.post");
-
+		if (ws->cond != NULL) {
+			loop = ssa_add_block(proc, node, "while.loop");
 		}
 		ssa_emit_jump(proc, loop);
 		proc->curr_block = loop;
 		if (loop != body) {
-			ssa_build_cond(proc, fs->cond, body, done);
+			ssa_build_cond(proc, ws->cond, body, done);
 			proc->curr_block = body;
 		}
 
-		ssa_push_target_list(proc, done, cont, NULL);
+		ssa_push_target_list(proc, done, loop, NULL);
 
 		ssa_open_scope(proc);
-		ssa_build_stmt(proc, fs->body);
+		ssa_build_stmt(proc, ws->body);
 		ssa_close_scope(proc, ssaDeferExit_Default, NULL);
 
 		ssa_pop_target_list(proc);
-		ssa_emit_jump(proc, cont);
-
-		if (fs->post != NULL) {
-			proc->curr_block = cont;
-			ssa_build_stmt(proc, fs->post);
-			ssa_emit_jump(proc, loop);
-		}
-
+		ssa_emit_jump(proc, loop);
 
 		proc->curr_block = done;
 	case_end;
 
 
-	case_ast_node(rs, RangeStmt, node);
-		ssa_emit_comment(proc, str_lit("RangeStmt"));
+	case_ast_node(rs, ForStmt, node);
+		ssa_emit_comment(proc, str_lit("ForStmt"));
 
 		Type *val_type = NULL;
 		Type *idx_type = NULL;

src/ssa_opt.c

@@ -90,7 +90,6 @@ void ssa_opt_add_operands(ssaValueArray *ops, ssaInstr *i) {
 	case ssaInstr_SliceBoundsCheck:
 		array_add(ops, i->SliceBoundsCheck.low);
 		array_add(ops, i->SliceBoundsCheck.high);
-		array_add(ops, i->SliceBoundsCheck.max);
 		break;
 	}
 }

src/ssa_print.c

@@ -1225,13 +1225,6 @@ void ssa_print_instr(ssaFileBuffer *f, ssaModule *m, ssaValue *value) {
 		ssa_fprintf(f, " ");
 		ssa_print_value(f, m, bc->high, t_int);
 
-		if (!bc->is_substring) {
-			ssa_fprintf(f, ", ");
-			ssa_print_type(f, m, t_int);
-			ssa_fprintf(f, " ");
-			ssa_print_value(f, m, bc->max, t_int);
-		}
-
 		ssa_fprintf(f, ")\n");
 	} break;
 

src/tokenizer.c

@@ -53,8 +53,6 @@ TOKEN_KIND(Token__AssignOpBegin, "_AssignOpBegin"), \
 	TOKEN_KIND(Token_CmpAndEq, "&&="), \
 	TOKEN_KIND(Token_CmpOrEq, "||="), \
 TOKEN_KIND(Token__AssignOpEnd, "_AssignOpEnd"), \
-	TOKEN_KIND(Token_Increment, "++"), \
-	TOKEN_KIND(Token_Decrement, "--"), \
 	TOKEN_KIND(Token_ArrowRight, "->"), \
 	TOKEN_KIND(Token_ArrowLeft, "<-"), \
 \
@@ -77,7 +75,7 @@ TOKEN_KIND(Token__ComparisonEnd, "_ComparisonEnd"), \
 	TOKEN_KIND(Token_Semicolon, ";"), \
 	TOKEN_KIND(Token_Period, "."), \
 	TOKEN_KIND(Token_Comma, ","), \
-	TOKEN_KIND(Token_Ellipsis, ".."), \
+	TOKEN_KIND(Token_Ellipsis, "..."), \
 	TOKEN_KIND(Token_Interval, "..<"), \
 TOKEN_KIND(Token__OperatorEnd, "_OperatorEnd"), \
 \
@@ -94,6 +92,7 @@ TOKEN_KIND(Token__KeywordBegin, "_KeywordBegin"), \
 	TOKEN_KIND(Token_then,           "then"), \
 	TOKEN_KIND(Token_if,             "if"), \
 	TOKEN_KIND(Token_else,           "else"), \
+	TOKEN_KIND(Token_while,          "while"), \
 	TOKEN_KIND(Token_for,            "for"), \
 	TOKEN_KIND(Token_when,           "when"), \
 	TOKEN_KIND(Token_range,          "range"), \
@@ -837,8 +836,10 @@ Token tokenizer_get_token(Tokenizer *t) {
 				token = scan_number_to_token(t, true);
 			} else if (t->curr_rune == '.') { // Could be an ellipsis
 				advance_to_next_rune(t);
-				token.kind = Token_Ellipsis;
-				if (t->curr_rune == '<') {
+				if (t->curr_rune == '.') {
+					advance_to_next_rune(t);
+					token.kind = Token_Ellipsis;
+				} else if (t->curr_rune == '<') {
 					advance_to_next_rune(t);
 					token.kind = Token_Interval;
 				}
@@ -891,10 +892,10 @@ Token tokenizer_get_token(Tokenizer *t) {
 		case '~': token.kind = token_kind_variant2(t, Token_Xor,   Token_XorEq);     break;
 		case '!': token.kind = token_kind_variant2(t, Token_Not,   Token_NotEq);     break;
 		case '+':
-			token.kind = token_kind_variant3(t, Token_Add, Token_AddEq, '+', Token_Increment);
+			token.kind = token_kind_variant2(t, Token_Add, Token_AddEq);
 			break;
 		case '-':
-			token.kind = token_kind_variant4(t, Token_Sub,   Token_SubEq, '-', Token_Decrement, '>', Token_ArrowRight);
+			token.kind = token_kind_variant3(t, Token_Sub, Token_SubEq, '>', Token_ArrowRight);
 			break;
 		case '/': {
 			if (t->curr_rune == '/') {