Add intrinsics.type_convert_variants_to_pointers and reflect.get_union_as_ptr_variants

core/intrinsics/intrinsics.odin

@@ -188,6 +188,8 @@ type_field_index_of :: proc($T: typeid, $name: string) -> uintptr ---
 type_equal_proc  :: proc($T: typeid) -> (equal:  proc "contextless" (rawptr, rawptr) -> bool)                 where type_is_comparable(T) ---
 type_hasher_proc :: proc($T: typeid) -> (hasher: proc "contextless" (data: rawptr, seed: uintptr) -> uintptr) where type_is_comparable(T) ---
 
+type_convert_variants_to_pointers :: proc($T: typeid) -> typeid where type_is_union(T) ---
+
 constant_utf16_cstring :: proc($literal: string) -> [^]u16 ---
 
 // SIMD related

core/reflect/reflect.odin

@@ -2,6 +2,7 @@ package reflect
 
 import "core:runtime"
 import "core:intrinsics"
+import "core:mem"
 _ :: intrinsics
 
 Type_Info :: runtime.Type_Info
@@ -739,6 +740,15 @@ get_union_variant :: proc(a: any) -> any {
 	return any{a.data, id}
 }
 
+get_union_as_ptr_variants :: proc(val: ^$T) -> (res: intrinsics.type_convert_variants_to_pointers(T)) where intrinsics.type_is_union(T) {
+	ptr := rawptr(val)
+	tag := get_union_variant_raw_tag(val^)
+	mem.copy(&res, &ptr, size_of(ptr))
+	set_union_variant_raw_tag(res, tag)
+	return
+}
+
+
 
 set_union_variant_raw_tag :: proc(a: any, tag: i64) {
 	if a == nil { return }