Begin supporting string16 across the core library

core/encoding/cbor/tags.odin

@@ -298,7 +298,7 @@ tag_base64_unmarshal :: proc(_: ^Tag_Implementation, d: Decoder, _: Tag_Number,
 
 	#partial switch t in ti.variant {
 	case reflect.Type_Info_String:
-
+		assert(!t.is_utf16)
 		if t.is_cstring {
 			length  := base64.decoded_len(bytes)
 			builder := strings.builder_make(0, length+1)

core/encoding/cbor/unmarshal.odin

@@ -335,6 +335,8 @@ _unmarshal_value :: proc(d: Decoder, v: any, hdr: Header, allocator := context.a
 _unmarshal_bytes :: proc(d: Decoder, v: any, ti: ^reflect.Type_Info, hdr: Header, add: Add, allocator := context.allocator, loc := #caller_location) -> (err: Unmarshal_Error) {
 	#partial switch t in ti.variant {
 	case reflect.Type_Info_String:
+		assert(!t.is_utf16)
+
 		bytes := err_conv(_decode_bytes(d, add, allocator=allocator, loc=loc)) or_return
 
 		if t.is_cstring {

core/encoding/json/marshal.odin

@@ -353,10 +353,10 @@ marshal_to_writer :: proc(w: io.Writer, v: any, opt: ^Marshal_Options) -> (err:
 			#partial switch info in ti.variant {
 			case runtime.Type_Info_String:
 				switch x in v {
-				case string:
-					return x == ""
-				case cstring:
-					return x == nil || x == ""
+				case string:    return x == ""
+				case cstring:   return x == nil || x == ""
+				case string16:  return x == ""
+				case cstring16: return x == nil || x == ""
 				}
 			case runtime.Type_Info_Any:
 				return v.(any) == nil

core/encoding/json/unmarshal.odin

@@ -570,7 +570,9 @@ unmarshal_object :: proc(p: ^Parser, v: any, end_token: Token_Kind) -> (err: Unm
 			key_ptr: rawptr
 
 			#partial switch tk in t.key.variant {
-				case runtime.Type_Info_String:			
+				case runtime.Type_Info_String:
+					assert(!tk.is_utf16)
+
 					key_ptr = rawptr(&key)
 					key_cstr: cstring
 					if reflect.is_cstring(t.key) {