Fix push_* with better defer system

code/demo.odin

@@ -1,10 +1,6 @@
 #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
-
 
 main :: proc() {
 
@@ -17,331 +13,4 @@ main :: proc() {
 		x^ = 1337
 		fmt.println(x^)
 	}
-
-
-	// struct_padding()
-	// bounds_checking()
-	// type_introspection()
-	// any_type()
-	// crazy_introspection()
-	// namespaces_and_files()
-	// miscellany()
-	// ht.run()
-	// game.run()
-	// {
-	// 	init :: proc(c: ^pn.Core) {}
-	// 	step :: proc(c: ^pn.Core) {}
-
-	// 	pn.run(init, step)
-	// }
 }
-
-struct_padding :: proc() {
-	{
-		A :: struct {
-			a: u8
-			b: u32
-			c: u16
-		}
-
-		B :: struct {
-			a: [7]u8
-			b: [3]u16
-			c: u8
-			d: u16
-		}
-
-		fmt.println("size_of(A):", size_of(A))
-		fmt.println("size_of(B):", size_of(B))
-
-		// n.b. http://cbloomrants.blogspot.co.uk/2012/07/07-23-12-structs-are-not-what-you-want.html
-	}
-	{
-		A :: struct #ordered {
-			a: u8
-			b: u32
-			c: u16
-		}
-
-		B :: struct #ordered {
-			a: [7]u8
-			b: [3]u16
-			c: u8
-			d: u16
-		}
-
-		fmt.println("size_of(A):", size_of(A))
-		fmt.println("size_of(B):", size_of(B))
-
-		// C-style structure layout
-	}
-	{
-		A :: struct #packed {
-			a: u8
-			b: u32
-			c: u16
-		}
-
-		B :: struct #packed {
-			a: [7]u8
-			b: [3]u16
-			c: u8
-			d: u16
-		}
-
-		fmt.println("size_of(A):", size_of(A))
-		fmt.println("size_of(B):", size_of(B))
-
-		// Useful for explicit layout
-	}
-
-	// Member sorting by priority
-	// Alignment desc.
-	// Size desc.
-	// source order asc.
-
-	/*
-		A :: struct {
-			a: u8
-			b: u32
-			c: u16
-		}
-
-		B :: struct {
-			a: [7]u8
-			b: [3]u16
-			c: u8
-			d: u16
-		}
-
-		Equivalent too
-
-		A :: struct #ordered {
-			b: u32
-			c: u16
-			a: u8
-		}
-
-		B :: struct #ordered {
-			b: [3]u16
-			d: u16
-			a: [7]u8
-			c: u8
-		}
-	*/
-}
-
-bounds_checking :: proc() {
-	x: [4]int
-	// x[-1] = 0; // Compile Time
-	// x[4]  = 0; // Compile Time
-
-	{
-		a, b := -1, 4;
-		// x[a] = 0; // Runtime Time
-		// x[b] = 0; // Runtime Time
-	}
-
-	// Works for arrays, strings, slices, and related procedures & operations
-
-	{
-		base: [10]int
-		s := base[2:6]
-		a, b := -1, 6
-
-		#no_bounds_check {
-			s[a] = 0;
-			// #bounds_check s[b] = 0;
-		}
-
-	#no_bounds_check
-		if s[a] == 0 {
-			// Do whatever
-		}
-
-		// Bounds checking can be toggled explicit
-		// on a per statement basis.
-		// _any statement_
-	}
-}
-
-type_introspection :: proc() {
-	{
-		info: ^Type_Info
-		x: int
-
-		info = type_info(int) // by type
-		info = type_info_of_val(x) // by value
-		// See: runtime.odin
-
-		match type i : info {
-		case Type_Info.Integer:
-			fmt.println("integer!")
-		case Type_Info.Float:
-			fmt.println("float!")
-		default:
-			fmt.println("potato!")
-		}
-
-		// Unsafe cast
-		integer_info := info as ^Type_Info.Integer
-	}
-
-	{
-		Vector2 :: struct { x, y: f32 }
-		Vector3 :: struct { x, y, z: f32 }
-
-		v1: Vector2
-		v2: Vector3
-		v3: Vector3
-
-		t1 := type_info_of_val(v1)
-		t2 := type_info_of_val(v2)
-		t3 := type_info_of_val(v3)
-
-		fmt.println()
-		fmt.print("Type of v1 is:\n\t", t1)
-
-		fmt.println()
-		fmt.print("Type of v2 is:\n\t", t2)
-
-		fmt.println("\n")
-		fmt.println("t1 == t2:", t1 == t2)
-		fmt.println("t2 == t3:", t2 == t3)
-	}
-}
-
-any_type :: proc() {
-	a: any
-
-	x: int = 123
-	y: f64 = 6.28
-	z: string = "Yo-Yo Ma"
-	// All types can be implicit cast to `any`
-	a = x
-	a = y
-	a = z
-	a = a // This the "identity" type, it doesn't get converted
-
-	a = 123 // Literals are copied onto the stack first
-
-	// any has two members
-	// data      - rawptr to the data
-	// type_info - pointer to the type info
-
-	fmt.println(x, y, z)
-	// See: fmt.odin
-	// For variadic any procedures in action
-}
-
-crazy_introspection :: proc() {
-	{
-		Fruit :: enum {
-			APPLE,
-			BANANA,
-			GRAPE,
-			MELON,
-			PEACH,
-			TOMATO,
-		}
-
-		s: string
-		s = enum_to_string(Fruit.PEACH)
-		fmt.println(s)
-
-		f := Fruit.GRAPE
-		s = enum_to_string(f)
-		fmt.println(s)
-
-		fmt.println(f)
-		// See: runtime.odin
-	}
-
-
-	{
-		// NOTE(bill): This is not safe code and I would not recommend this at all
-		// I'd recommend you use `match type` to get the subtype rather than
-		// casting pointers
-
-		Fruit :: enum {
-			APPLE,
-			BANANA,
-			GRAPE,
-			MELON,
-			PEACH,
-			TOMATO,
-		}
-
-		fruit_ti := type_info(Fruit)
-		name := (fruit_ti as ^Type_Info.Named).name // Unsafe casts
-		info := type_info_base(fruit_ti) as ^Type_Info.Enum // Unsafe casts
-
-		fmt.printf("% :: enum % {\n", name, info.base);
-		for i := 0; i < info.values.count; i++ {
-			fmt.printf("\t%\t= %,\n", info.names[i], info.values[i])
-		}
-		fmt.printf("}\n")
-
-		// NOTE(bill): look at that type-safe printf!
-	}
-
-	{
-		Vector3 :: struct {x, y, z: f32}
-
-		a := Vector3{x = 1, y = 4, z = 9}
-		fmt.println(a)
-		b := Vector3{x = 9, y = 3, z = 1}
-		fmt.println(b)
-
-		// NOTE(bill): See fmt.odin
-	}
-
-	// n.b. This pretty much "solves" serialization (to strings)
-}
-
-// #import "test.odin"
-
-namespaces_and_files :: proc() {
-
-	// test.thing()
-	// test.format.println()
-	// test.println()
-	/*
-		// Non-exporting import
-		#import "file.odin"
-		#import "file.odin" as file
-		#import "file.odin" as .
-		#import "file.odin" as _
-
-		// Exporting import
-		#load "file.odin"
-	*/
-
-	// Talk about scope rules and diagram
-}
-
-miscellany :: proc() {
-	/*
-		win32 `__imp__` prefix
-		#dll_import
-		#dll_export
-
-		Change exported name/symbol for linking
-		#link_name
-
-		Custom calling conventions
-		#stdcall
-		#fastcall
-
-		Runtime stuff
-		#shared_global_scope
-	*/
-
-	// assert(false)
-	// compile_assert(false)
-	// panic("Panic message goes here")
-}
-
-
-
-