Fix old_demos; Fix when bug; Fix enum .names

examples/factorial.odin

@@ -1,4 +1,4 @@
-import "fmt.odin";
+import "core:fmt.odin";
 
 main :: proc() {
 	recursive_factorial :: proc(i: u64) -> u64 {

examples/game.odin

@@ -1,9 +1,9 @@
-import win32 "sys/windows.odin" when ODIN_OS == "windows";
-import wgl "sys/wgl.odin" when ODIN_OS == "windows";
-import "fmt.odin";
-import "math.odin";
-import "os.odin";
-import gl "opengl.odin";
+import win32 "core:sys/windows.odin" when ODIN_OS == "windows";
+import wgl "core:sys/wgl.odin" when ODIN_OS == "windows";
+import "core:fmt.odin";
+import "core:math.odin";
+import "core:os.odin";
+import gl "core:opengl.odin";
 
 TWO_HEARTS :: '💕';
 
@@ -32,12 +32,12 @@ to_c_string :: proc(s: string) -> []u8 {
 
 
 Window :: struct {
-	width, height:      int;
-	wc:                 win32.Wnd_Class_Ex_A;
-	dc:                 win32.Hdc;
-	hwnd:               win32.Hwnd;
-	opengl_context, rc: wgl.Hglrc;
-	c_title:            []u8;
+	width, height:      int,
+	wc:                 win32.Wnd_Class_Ex_A,
+	dc:                 win32.Hdc,
+	hwnd:               win32.Hwnd,
+	opengl_context, rc: wgl.Hglrc,
+	c_title:            []u8,
 }
 
 make_window :: proc(title: string, msg, height: int, window_proc: win32.Wnd_Proc) -> (Window, bool) {

examples/hello.odin

@@ -1,4 +1,4 @@
-import "fmt.odin";
+import "core:fmt.odin";
 
 main :: proc() {
 	fmt.println("Hellope, world!");

examples/old_demos/demo001.odin

@@ -1,9 +1,9 @@
-#import "fmt.odin";
-#import "os.odin";
-#import "mem.odin";
-// #import "http_test.odin" as ht;
-// #import "game.odin" as game;
-// #import "punity.odin" as pn;
+import "core:fmt.odin";
+import "core:os.odin";
+import "core:mem.odin";
+// import "http_test.odin" as ht;
+// import "game.odin" as game;
+// import "punity.odin" as pn;
 
 main :: proc() {
 	struct_padding();
@@ -160,21 +160,21 @@ type_introspection :: proc() {
 		info: ^Type_Info;
 		x: int;
 
-		info = type_info(int); // by type
-		info = type_info_of_val(x); // by value
+		info = type_info_of(int); // by type
+		info = type_info_of(x);   // by value
 		// See: runtime.odin
 
-		match i in info {
-		case Type_Info.Integer:
+		match i in info.variant {
+		case Type_Info_Integer:
 			fmt.println("integer!");
-		case Type_Info.Float:
+		case Type_Info_Float:
 			fmt.println("float!");
-		default:
+		case:
 			fmt.println("potato!");
 		}
 
 		// Unsafe cast
-		integer_info := cast(^Type_Info.Integer)cast(rawptr)info;
+		integer_info := cast(^Type_Info_Integer)cast(rawptr)info;
 	}
 
 	{
@@ -185,9 +185,9 @@ type_introspection :: proc() {
 		v2: Vector3;
 		v3: Vector3;
 
-		t1 := type_info_of_val(v1);
-		t2 := type_info_of_val(v2);
-		t3 := type_info_of_val(v3);
+		t1 := type_info_of(v1);
+		t2 := type_info_of(v2);
+		t3 := type_info_of(v3);
 
 		fmt.println();
 		fmt.print("Type of v1 is:\n\t", t1);
@@ -262,12 +262,12 @@ crazy_introspection :: proc() {
 			TOMATO,
 		}
 
-		fruit_ti := type_info(Fruit);
-		name := (union_cast(^Type_Info.Named)fruit_ti).name; // Unsafe casts
-		info, _ := union_cast(^Type_Info.Enum)type_info_base(fruit_ti); // Unsafe casts
+		fruit_ti := type_info_of(Fruit);
+		name := fruit_ti.variant.(Type_Info_Named).name;
+		info, _ := type_info_base(fruit_ti).variant.(Type_Info_Enum);
 
 		fmt.printf("%s :: enum %T {\n", name, info.base);
-		for i := 0; i < len(info.values); i++ {
+		for _, i in info.values {
 			fmt.printf("\t%s\t= %v,\n", info.names[i], info.values[i]);
 		}
 		fmt.printf("}\n");

examples/old_demos/demo002.odin

@@ -1,7 +1,8 @@
 // Demo 002
-#load "fmt.odin";
-#load "math.odin";
-// #load "game.odin"
+export "core:fmt.odin";
+export "core:math.odin";
+export "core:mem.odin";
+// export "game.odin"
 
 #thread_local tls_int: int;
 
@@ -94,11 +95,9 @@ enumerations :: proc() {
 }
 
 variadic_procedures :: proc() {
-	print_ints :: proc(args: ..int) {
+	print_ints :: proc(args: ...int) {
 		for arg, i in args {
-			if i > 0 {
-				print(", ");
-			}
+			if i > 0 do print(", ");
 			print(arg);
 		}
 	}
@@ -107,13 +106,11 @@ variadic_procedures :: proc() {
 	print_ints(1); nl();
 	print_ints(1, 2, 3); nl();
 
-	print_prefix_f32s :: proc(prefix: string, args: ..f32) {
+	print_prefix_f32s :: proc(prefix: string, args: ...f32) {
 		print(prefix);
 		print(": ");
 		for arg, i in args {
-			if i > 0 {
-				print(", ");
-			}
+			if i > 0 do print(", ");
 			print(arg);
 		}
 	}
@@ -147,13 +144,7 @@ new_builtins :: proc() {
 
 		// Q: Should this be `free` rather than `free` and should I overload it for slices too?
 
-		{
-			prev_context := context;
-			defer __context = prev_context;
-			// Q: Should I add a `push_context` feature to the language?
-
-			__context.allocator = default_allocator();
-
+		push_allocator default_allocator() {
 			a := new(int);
 			defer free(a);
 
@@ -164,7 +155,7 @@ new_builtins :: proc() {
 
 	{
 		a: int = 123;
-		b: type_of_val(a) = 321;
+		b: type_of(a) = 321;
 
 		// NOTE(bill): This matches the current naming scheme
 		// size_of
@@ -205,7 +196,7 @@ new_builtins :: proc() {
 
 		a: [16]int;
 		a[1] = 1;
-		b := ^a;
+		b := &a;
 		// Auto pointer deref
 		// consistent with record members
 		assert(b[1] == 1);
@@ -255,7 +246,7 @@ match_statement :: proc() {
 			print("5!\n");
 			fallthrough; // explicit fallthrough
 
-		default:
+		case:
 			print("default!\n");
 		}
 
@@ -267,7 +258,7 @@ match_statement :: proc() {
 			// break by default
 		case TAU:
 			print("τ!\n");
-		default:
+		case:
 			print("default!\n");
 		}
 
@@ -279,7 +270,7 @@ match_statement :: proc() {
 			// break by default
 		case "Goodbye":
 			print("farewell\n");
-		default:
+		case:
 			print("???\n");
 		}
 
@@ -302,7 +293,7 @@ match_statement :: proc() {
 			print("dozens\n");
 		case a >= 100 && a < 1000:
 			print("hundreds\n");
-		default:
+		case:
 			print("a fuck ton\n");
 		}
 
@@ -332,11 +323,9 @@ match_statement :: proc() {
 
 Vector3 :: struct {x, y, z: f32}
 
-print_floats :: proc(args: ..f32) {
+print_floats :: proc(args: ...f32) {
 	for arg, i in args {
-		if i > 0 {
-			print(", ");
-		}
+		if i > 0 do print(", ");
 		print(arg);
 	}
 	println();
@@ -355,7 +344,7 @@ namespacing :: proc() {
 			Thing :: #type struct {
 				y: int,
 				test: bool,
-			}
+			};
 
 			b: Thing; // Uses this scope's Thing
 			b.test = true;
@@ -473,10 +462,10 @@ namespacing :: proc() {
 		}
 
 		e := Entity{position = Vector3{1, 2, 3}};
-		print_pos_1(^e);
-		print_pos_2(^e);
-		print_pos_3(^e);
-		print_pos_4(^e);
+		print_pos_1(&e);
+		print_pos_2(&e);
+		print_pos_3(&e);
+		print_pos_4(&e);
 
 		// This is similar to C++'s `this` pointer that is implicit and only available in methods
 	}
@@ -574,20 +563,20 @@ subtyping :: proc() {
 		entity_count := 0;
 
 		next_entity :: proc(entities: []Entity, entity_count: ^int) -> ^Entity {
-			e := ^entities[entity_count^];
-			entity_count^++;
+			e := &entities[entity_count^];
+			entity_count^ += 1;
 			return e;
 		}
 
 		f: Frog;
-		f.entity = next_entity(entities[..], ^entity_count);
+		f.entity = next_entity(entities[..], &entity_count);
 		f.position = Vector3{3, 4, 6};
 
 		using f.position;
 		print_floats(x, y, z);
 	}
 
-	{
+	/*{
 		// Down casting
 
 		Entity :: struct {
@@ -609,7 +598,7 @@ subtyping :: proc() {
 
 		// NOTE(bill): `down_cast` is unsafe and there are not check are compile time or run time
 		// Q: Should I completely remove `down_cast` as I added it in about 30 minutes
-	}
+	}*/
 
 	{
 		// Multiple "inheritance"/subclassing
@@ -630,7 +619,7 @@ subtyping :: proc() {
 
 tagged_unions :: proc() {
 	{
-		EntityKind :: enum {
+		Entity_Kind :: enum {
 			INVALID,
 			FROG,
 			GIRAFFE,
@@ -638,8 +627,8 @@ tagged_unions :: proc() {
 		}
 
 		Entity :: struct {
-			kind: EntityKind
-			using data: raw_union {
+			kind: Entity_Kind
+			using data: struct #raw_union {
 				frog: struct {
 					jump_height: f32,
 					colour: u32,
@@ -657,33 +646,31 @@ tagged_unions :: proc() {
 		}
 
 		e: Entity;
-		e.kind = EntityKind.FROG;
+		e.kind = Entity_Kind.FROG;
 		e.frog.jump_height = 12;
 
-		f: type_of_val(e.frog);
+		f: type_of(e.frog);
 
 		// But this is very unsafe and extremely cumbersome to write
 		// In C++, I use macros to alleviate this but it's not a solution
 	}
 
 	{
-		Entity :: union {
-			Frog{
-				jump_height: f32,
-				colour: u32,
-			},
-			Giraffe{
-				neck_length: f32,
-				spot_count: int,
-			},
-			Helicopter{
-				blade_count: int,
-				weight: f32,
-				pilot_name: string,
-			},
+		Frog :: struct {
+			jump_height: f32,
+			colour: u32,
 		}
+		Giraffe :: struct {
+			neck_length: f32,
+			spot_count: int,
+		}
+		Helicopter :: struct {
+			blade_count: int,
+			weight: f32,
+			pilot_name: string,
+		}
+		Entity :: union {Frog, Giraffe, Helicopter};
 
-		using Entity;
 		f1: Frog = Frog{12, 0xff9900};
 		f2: Entity = Frog{12, 0xff9900}; // Implicit cast
 		f3 := cast(Entity)Frog{12, 0xff9900}; // Explicit cast
@@ -703,7 +690,7 @@ tagged_unions :: proc() {
 		// Requires a pointer to the union
 		// `x` will be a pointer to type of the case
 
-		match x in ^f {
+		match x in &f {
 		case Frog:
 			print("Frog!\n");
 			print(x.jump_height); nl();
@@ -713,7 +700,7 @@ tagged_unions :: proc() {
 			print("Giraffe!\n");
 		case Helicopter:
 			print("ROFLCOPTER!\n");
-		default:
+		case:
 			print("invalid entity\n");
 		}
 
@@ -755,11 +742,11 @@ tagged_unions :: proc() {
 		AstNode    :: struct {};
 		ExactValue :: struct {};
 
-		EntityKind :: enum {
+		Entity_Kind :: enum {
 			Invalid,
 			Constant,
 			Variable,
-			UsingVariable,
+			Using_Variable,
 			TypeName,
 			Procedure,
 			Builtin,
@@ -769,14 +756,14 @@ tagged_unions :: proc() {
 		Guid :: i64;
 		Entity :: struct {
 
-			kind: EntityKind,
+			kind: Entity_Kind,
 			guid: Guid,
 
 			scope: ^Scope,
 			token: Token,
 			type_: ^Type,
 
-			using data: raw_union {
+			using data: struct #raw_union {
 				Constant: struct {
 					value: ExactValue,
 				},
@@ -786,7 +773,7 @@ tagged_unions :: proc() {
 					is_field:  bool, // Is struct field
 					anonymous: bool, // Variable is an anonymous
 				},
-				UsingVariable: struct {
+				Using_Variable: struct {
 				},
 				TypeName: struct {
 				},
@@ -813,44 +800,44 @@ tagged_unions :: proc() {
 
 		Guid :: i64;
 		Entity_Base :: struct {
-
 		}
 
-		Entity :: union {
+
+		Constant :: struct {
+			value: ExactValue,
+		}
+		Variable :: struct {
+			visited:   bool, // Cycle detection
+			used:      bool, // Variable is used
+			is_field:  bool, // Is struct field
+			anonymous: bool, // Variable is an anonymous
+		}
+		Using_Variable :: struct {
+		}
+		TypeName :: struct {
+		}
+		Procedure :: struct {
+			used: bool,
+		}
+		Builtin :: struct {
+			id: int,
+		}
+
+		Entity :: struct {
 			guid: Guid,
 
 			scope: ^Scope,
 			token: Token,
 			type_: ^Type,
 
-			Constant{
-				value: ExactValue,
-			},
-			Variable{
-				visited:   bool, // Cycle detection
-				used:      bool, // Variable is used
-				is_field:  bool, // Is struct field
-				anonymous: bool, // Variable is an anonymous
-			},
-			UsingVariable{
-			},
-			TypeName{
-			},
-			Procedure{
-				used: bool,
-			},
-			Builtin{
-				id: int,
-			},
+			variant: union {Constant, Variable, Using_Variable, TypeName, Procedure, Builtin},
 		}
 
-		using Entity;
-
-		e: Entity;
-
-		e = Variable{
-			used = true,
-			anonymous = false,
+		e := Entity{
+			variant = Variable{
+				used = true,
+				anonymous = false,
+			},
 		};
 
 
@@ -863,13 +850,13 @@ tagged_unions :: proc() {
 	{
 		// `Raw` unions still have uses, especially for mathematic types
 
-		Vector2 :: raw_union {
+		Vector2 :: struct #raw_union {
 			using xy_: struct { x, y: f32 },
 			e: [2]f32,
 			v: [vector 2]f32,
 		}
 
-		Vector3 :: raw_union {
+		Vector3 :: struct #raw_union {
 			using xyz_: struct { x, y, z: f32 },
 			xy: Vector2,
 			e: [3]f32,

examples/old_demos/demo004.odin

@@ -1,14 +1,14 @@
-#import "fmt.odin";
-#import "utf8.odin";
-#import "hash.odin";
-#import "mem.odin";
+import "core:fmt.odin";
+import "core:utf8.odin";
+import "core:hash.odin";
+import "core:mem.odin";
 
 main :: proc() {
 	{ // New Standard Library stuff
 		s := "Hello";
 		fmt.println(s,
 		            utf8.valid_string(s),
-		            hash.murmur64(cast([]byte)s));
+		            hash.murmur64(cast([]u8)s));
 
 		// utf8.odin
 		// hash.odin
@@ -20,10 +20,10 @@ main :: proc() {
 
 	{
 		arena: mem.Arena;
-		mem.init_arena_from_context(^arena, mem.megabytes(16)); // Uses default allocator
-		defer mem.free_arena(^arena);
+		mem.init_arena_from_context(&arena, mem.megabytes(16)); // Uses default allocator
+		defer mem.destroy_arena(&arena);
 
-		push_allocator mem.arena_allocator(^arena) {
+		push_allocator mem.arena_allocator(&arena) {
 			x := new(int);
 			x^ = 1337;
 
@@ -49,7 +49,7 @@ main :: proc() {
 		// You can also "push" a context
 
 		c := context; // Create copy of the allocator
-		c.allocator = mem.arena_allocator(^arena);
+		c.allocator = mem.arena_allocator(&arena);
 
 		push_context c {
 			x := new(int);

examples/old_demos/demo005.odin

@@ -1,13 +1,13 @@
-#import "fmt.odin";
-#import "utf8.odin";
-// #import "atomic.odin";
-// #import "hash.odin";
-// #import "math.odin";
-// #import "mem.odin";
-// #import "opengl.odin";
-// #import "os.odin";
-// #import "sync.odin";
-// #import win32 "sys/windows.odin";
+import "core:fmt.odin";
+import "core:utf8.odin";
+// import "core:atomic.odin";
+// import "core:hash.odin";
+// import "core:math.odin";
+// import "core:mem.odin";
+// import "core:opengl.odin";
+// import "core:os.odin";
+// import "core:sync.odin";
+// import win32 "core:sys/windows.odin";
 
 main :: proc() {
 	// syntax();
@@ -43,7 +43,7 @@ syntax :: proc() {
 	Thing2 :: struct {x: f32, y: int, z: ^[]int};
 
 	// Slice interals are now just a `ptr+len+cap`
-	slice: []int; compile_assert(size_of_val(slice) == 3*size_of(int));
+	slice: []int; compile_assert(size_of(slice) == 3*size_of(int));
 
 	// Helper type - Help the reader understand what it is quicker
 	My_Int  :: #type int;
@@ -90,22 +90,17 @@ Prefix_Type :: struct {x: int, y: f32, z: rawptr};
 
 prefixes :: proc() {
 	using var: Prefix_Type;
-	immutable const := Prefix_Type{1, 2, nil};
 	var.x = 123;
 	x = 123;
-	// const.x = 123; // const is immutable
 
 
-
-	foo :: proc(using immutable pt: Prefix_Type, immutable int_ptr: ^int) {
-		// int_ptr = nil; // Not valid
-		// int_ptr^ = 123; // Not valid
+	foo :: proc(using pt: Prefix_Type) {
 	}
 
 
 
 	// Same as C99's `restrict`
-	bar :: proc(no_alias a, b: ^int) {
+	bar :: proc(#no_alias a, b: ^int) {
 		// Assumes a never equals b so it can perform optimizations with that fact
 	}
 
@@ -138,14 +133,18 @@ when_statements :: proc() {
 	foreign_procedures();
 }
 
-#foreign_system_library win32_user "user32.lib" when ODIN_OS == "windows";
+when ODIN_OS == "windows" {
+	foreign_system_library win32_user "user32.lib";
+}
 // NOTE: This is done on purpose for two reasons:
 // * Makes it clear where the platform specific stuff is
 // * Removes the need to solve the travelling salesman problem when importing files :P
 
 foreign_procedures :: proc() {
-	ShowWindow  :: proc(hwnd: rawptr, cmd_show: i32) -> i32 #foreign win32_user;
-	show_window :: proc(hwnd: rawptr, cmd_show: i32) -> i32 #foreign win32_user "ShowWindow";
+	foreign win32_user {
+		ShowWindow  :: proc(hwnd: rawptr, cmd_show: i32) -> i32 ---;
+		show_window :: proc(hwnd: rawptr, cmd_show: i32) -> i32 #link_name "ShowWindow" ---;
+	}
 	// NOTE: If that library doesn't get used, it doesn't get linked with
 	// NOTE: There is not link checking yet to see if that procedure does come from that library
 
@@ -203,14 +202,14 @@ loops :: proc() {
 		fmt.println(val, idx);
 	}
 
-	primes := [..]int{2, 3, 5, 7, 11, 13, 17, 19};
+	primes := [...]int{2, 3, 5, 7, 11, 13, 17, 19};
 
 	for p in primes {
 		fmt.println(p);
 	}
 
 	// Pointers to arrays, slices, or strings are allowed
-	for _ in ^primes {
+	for _ in &primes {
 		// ignore the value and just iterate across it
 	}
 
@@ -219,7 +218,7 @@ loops :: proc() {
 	name := "你好，世界";
 	fmt.println(name);
 	for r in name {
-		compile_assert(type_of_val(r) == rune);
+		compile_assert(type_of(r) == rune);
 		fmt.printf("%r\n", r);
 	}
 
@@ -270,8 +269,8 @@ procedure_overloading :: proc() {
 	a: i32 = 123;
 	b: f32;
 	c: rawptr;
-	fmt.println(foo(^a));
-	foo(^b);
+	fmt.println(foo(&a));
+	foo(&b);
 	foo(c);
 	// foo(nil); // nil could go to numerous types thus the ambiguity
 

examples/old_demos/demo006.odin

@@ -1,14 +1,14 @@
-#import "atomic.odin";
-#import "hash.odin";
-#import "mem.odin";
-#import "opengl.odin";
-#import "strconv.odin";
-#import "sync.odin";
-#import win32 "sys/windows.odin";
+// import "core:atomic.odin";
+import "core:hash.odin";
+import "core:mem.odin";
+import "core:opengl.odin";
+import "core:strconv.odin";
+import "core:sync.odin";
+import win32 "core:sys/windows.odin";
 
-#import "fmt.odin";
-#import "os.odin";
-#import "math.odin";
+import "core:fmt.odin";
+import "core:os.odin";
+import "core:math.odin";
 
 
 main :: proc() {
@@ -55,7 +55,7 @@ when true {
 		for i in 0..16 {
 		}
 		// Is similar to
-		for _i := 0; _i < 16; _i++ { immutable i := _i;
+		for i := 0; i < 16; i += 1 {
 		}
 	}
 
@@ -77,16 +77,15 @@ when true {
 	}
 
 	{
-		t := type_info(int);
-		using Type_Info;
-		match i in t {
-		case Integer, Float:
+		t := type_info_of(int);
+		match i in t.variant {
+		case Type_Info_Integer, Type_Info_Float:
 			fmt.println("It's a number");
 		}
 
 
 		x: any = 123;
-		foo 		match i in x {
+		foo: match i in x {
 		case int, f32:
 			fmt.println("It's an int or f32");
 			break foo;
@@ -112,21 +111,20 @@ when true {
 
 	{
 		// Slices now store a capacity
-		buf: [256]byte;
-		s: []byte;
+		buf: [256]u8;
+		s: []u8;
 		s = buf[..0]; // == buf[0..0];
-		fmt.println("count =", s.count);
-		fmt.println("capacity =", s.capacity);
-		append(s, 1, 2, 3);
+		fmt.println("count =", len(s));
+		fmt.println("capacity =", cap(s));
+		append(&s, 1, 2, 3);
 		fmt.println(s);
 
 		s = buf[1..2..3];
-		fmt.println("count =", s.count);
-		fmt.println("capacity =", s.capacity);
+		fmt.println("count =", len(s));
+		fmt.println("capacity =", cap(s));
 		fmt.println(s);
 
-		clear(s); // Sets count to zero
-		s.count = 0; // Equivalent
+		clear(&s); // Sets count to zero
 	}
 
 	{
@@ -136,11 +134,11 @@ when true {
 			flags:   u32,
 		}
 		foo_array: [256]Foo;
-		foo_as_bytes: []byte = slice_to_bytes(foo_array[..]);
+		foo_as_bytes: []u8 = mem.slice_to_bytes(foo_array[..]);
 		// Useful for things like
 		// os.write(handle, foo_as_bytes);
 
-		foo_slice := slice_ptr(cast(^Foo)foo_as_bytes.data, foo_as_bytes.count/size_of(Foo), foo_as_bytes.capacity/size_of(Foo));
+		foo_slice := mem.slice_ptr(cast(^Foo)&foo_as_bytes[0], len(foo_as_bytes)/size_of(Foo), cap(foo_as_bytes)/size_of(Foo));
 		// Question: Should there be a bytes_to_slice procedure or is it clearer to do this even if it is error prone?
 		// And if so what would the syntax be?
 		// slice_transmute([]Foo, foo_as_bytes);
@@ -161,33 +159,26 @@ when true {
 			fmt.println(i);
 		}
 
-		compile_assert(size_of([vector 7]bool) == size_of([7]bool));
-		compile_assert(size_of([vector 7]i32) == size_of([7]i32));
+		compile_assert(size_of([vector 7]bool) >= size_of([7]bool));
+		compile_assert(size_of([vector 7]i32) >= size_of([7]i32));
 		// align_of([vector 7]i32) != align_of([7]i32) // this may be the case
 	}
 
 	{
 		// fmt.* changes
-		// bprint* returns `int` (bytes written)
-		// sprint* returns `string` (bytes written as a string)
+		// bprint* returns `string`
 
-		data: [256]byte;
-		str := fmt.sprintf(data[..0], "Hellope %d %s %c", 123, "others", '!');
+		data: [256]u8;
+		str := fmt.bprintf(data[..], "Hellope %d %s %c", 123, "others", '!');
 		fmt.println(str);
-
-		buf := data[..0];
-		count := fmt.bprintf(^buf, "Hellope %d %s %c", 321, "y'all", '!');
-		fmt.println(cast(string)buf[..count]);
-
-		// NOTE(bill): We may change this but because this is a library feature, I am not that bothered yet
 	}
 
 	{
 		x: [dynamic]f64;
-		reserve(x, 16);
+		reserve(&x, 16);
 		defer free(x); // `free` is overloaded for numerous types
 		// Number literals can have underscores in them for readability
-		append(x, 2_000_000.500_000, 123, 5, 7); // variadic append
+		append(&x, 2_000_000.500_000, 123, 5, 7); // variadic append
 
 		for p, i in x {
 			if i > 0 { fmt.print(", "); }
@@ -201,13 +192,13 @@ when true {
 		x := [dynamic]f64{2_000_000.500_000, 3, 5, 7};
 		defer free(x);
 		fmt.println(x); // fmt.print* supports printing of dynamic types
-		clear(x);
+		clear(&x);
 		fmt.println(x);
 	}
 
 	{
 		m: map[f32]int;
-		reserve(m, 16);
+		reserve(&m, 16);
 		defer free(m);
 
 		m[1.0] = 1278;
@@ -241,12 +232,12 @@ when true {
 		assert(ok && c == 7654);
 		fmt.println(m);
 
-		delete(m, "c"); // deletes entry with key "c"
+		delete(&m, "c"); // deletes entry with key "c"
 		_, found := m["c"];
 		assert(!found);
 
 		fmt.println(m);
-		clear(m);
+		clear(&m);
 		fmt.println(m);
 
 		// NOTE: Fixed size maps are planned but we have not yet implemented
@@ -257,7 +248,21 @@ when true {
 		Vector3 :: struct{x, y, z: f32};
 		Quaternion :: struct{x, y, z, w: f32};
 
-		Entity :: union {
+		// Variants
+		Frog :: struct {
+			ribbit_volume: f32,
+			jump_height:   f32,
+		}
+		Door :: struct {
+			openness: f32,
+		}
+		Map :: struct {
+			width, height:   f32,
+			place_positions: []Vector3,
+			place_names:     []string,
+		}
+
+		Entity :: struct {
 			// Common Fields
 			id:             u64,
 			name:           string,
@@ -265,25 +270,13 @@ when true {
 			orientation:    Quaternion,
 			flags:          u32,
 
-			// Variants
-			Frog{
-				ribbit_volume: f32,
-				jump_height:   f32,
-			},
-			Door{
-				openness: f32,
-			},
-			Map{
-				width, height:   f32,
-				place_positions: []Vector3,
-				place_names:     []string,
-			},
+			variant: union { Frog, Door, Map },
 		}
 
 		entity: Entity;
+		entity.id = 1337;
 		// implicit conversion from variant to base type
-		entity = Entity.Frog{
-			id = 1337,
+		entity.variant = Frog{
 			ribbit_volume = 0.5,
 			jump_height = 2.1,
 			/*other data */
@@ -292,26 +285,25 @@ when true {
 		entity.name = "Frank";
 		entity.position = Vector3{1, 4, 9};
 
-		using Entity;
-		match e in entity {
+		match e in entity.variant {
 		case Frog:
 			fmt.println("Ribbit");
 		case Door:
 			fmt.println("Creak");
 		case Map:
 			fmt.println("Rustle");
-		default:
+		case:
 			fmt.println("Just a normal entity");
 		}
 
-		if frog, ok := union_cast(Frog)entity; ok {
-			fmt.printf("The frog jumps %f feet high at %v\n", frog.jump_height, frog.position);
+		if frog, ok := entity.variant.(Frog); ok {
+			fmt.printf("The frog jumps %f feet high at %v\n", frog.jump_height, entity.position);
 		}
 
 		// Panics if not the correct type
 		frog: Frog;
-		frog = union_cast(Frog)entity;
-		frog, _ = union_cast(Frog)entity; // ignore error and force cast
+		frog = entity.variant.(Frog);
+		frog, _ = entity.variant.(Frog); // ignore error and force cast
 	}
 }
 }

examples/punity.odin

@@ -1,7 +1,7 @@
-import win32 "sys/windows.odin";
-import "fmt.odin";
-import "os.odin";
-import "mem.odin";
+import win32 "core:sys/windows.odin";
+import "core:fmt.odin";
+import "core:os.odin";
+import "core:mem.odin";
 
 
 CANVAS_WIDTH  :: 128;
@@ -25,13 +25,13 @@ DRAW_LIST_RESERVE :: 128;
 MAX_KEYS :: 256;
 
 Core :: struct {
-	stack:   ^Bank;
-	storage: ^Bank;
+	stack:   ^Bank,
+	storage: ^Bank,
 
-	running:       bool;
-	key_modifiers: u32;
-	key_states:    [MAX_KEYS]u8;
-	key_deltas:    [MAX_KEYS]u8;
+	running:       bool,
+	key_modifiers: u32,
+	key_states:    [MAX_KEYS]u8,
+	key_deltas:    [MAX_KEYS]u8,
 
 	perf_frame,
 	perf_frame_inner,
@@ -39,66 +39,66 @@ Core :: struct {
 	perf_audio,
 	perf_blit,
 	perf_blit_cvt,
-	perf_blit_gdi: Perf_Span;
+	perf_blit_gdi: Perf_Span,
 
-	frame: i64;
+	frame: i64,
 
-	canvas:    Canvas;
-	draw_list: ^Draw_List;
+	canvas:    Canvas,
+	draw_list: ^Draw_List,
 }
 
 Perf_Span :: struct {
-	stamp: f64;
-	delta: f32;
+	stamp: f64,
+	delta: f32,
 }
 
 Bank :: struct {
-	memory: []u8;
-	cursor: int;
+	memory: []u8,
+	cursor: int,
 }
 
 Bank_State :: struct {
-	state: Bank;
-	bank: ^Bank;
+	state: Bank,
+	bank: ^Bank,
 }
 
 
 Color :: struct #raw_union {
-	using channels: struct{a, b, g, r: u8};
-	rgba: u32;
+	using channels: struct{a, b, g, r: u8},
+	rgba: u32,
 }
 
 Palette :: struct {
-	colors: [256]Color;
-	colors_count: u8;
+	colors: [256]Color,
+	colors_count: u8,
 }
 
 
 Rect :: struct #raw_union {
-	using minmax: struct {min_x, min_y, max_x, max_y: int};
-	using pos: struct {left, top, right, bottom: int};
-	e: [4]int;
+	using minmax: struct {min_x, min_y, max_x, max_y: int},
+	using pos: struct {left, top, right, bottom: int},
+	e: [4]int,
 }
 
 Bitmap :: struct {
-	pixels: []u8;
-	width:  int;
-	height: int;
+	pixels: []u8,
+	width:  int,
+	height: int,
 }
 
 Font :: struct {
-	using bitmap: Bitmap;
-	char_width:   int;
-	char_height:  int;
+	using bitmap: Bitmap,
+	char_width:   int,
+	char_height:  int,
 }
 
 Canvas :: struct {
-	using bitmap: ^Bitmap;
-	palette:      Palette;
-	translate_x:  int;
-	translate_y:  int;
-	clip:         Rect;
-	font:         ^Font;
+	using bitmap: ^Bitmap,
+	palette:      Palette,
+	translate_x:  int,
+	translate_y:  int,
+	clip:         Rect,
+	font:         ^Font,
 }
 
 DrawFlag :: enum {
@@ -110,7 +110,7 @@ DrawFlag :: enum {
 
 Draw_Item :: struct {}
 Draw_List :: struct {
-	items: []Draw_Item;
+	items: []Draw_Item,
 }
 
 Key :: enum {