Add json encoding test + fix enum not being set on success.

core/encoding/json/marshal.odin

@@ -18,7 +18,7 @@ Marshal_Error :: union {
 
 marshal :: proc(v: any, allocator := context.allocator) -> (data: []byte, err: Marshal_Error) {
 	b := strings.make_builder(allocator)
-	defer if err != nil || data == nil {
+	defer if err != .None {
 		strings.destroy_builder(&b)
 	}
 
@@ -27,7 +27,7 @@ marshal :: proc(v: any, allocator := context.allocator) -> (data: []byte, err: M
 	if len(b.buf) != 0 {
 		data = b.buf[:]
 	}
-	return
+	return data, .None
 }
 
 marshal_to_builder :: proc(b: ^strings.Builder, v: any) -> Marshal_Error {

core/encoding/json/parser.odin

@@ -106,6 +106,7 @@ parse_comma :: proc(p: ^Parser) -> (do_break: bool) {
 }
 
 parse_value :: proc(p: ^Parser) -> (value: Value, err: Error) {
+	err = .None
 	token := p.curr_token
 	#partial switch token.kind {
 	case .Null:
@@ -175,6 +176,7 @@ parse_value :: proc(p: ^Parser) -> (value: Value, err: Error) {
 }
 
 parse_array :: proc(p: ^Parser) -> (value: Value, err: Error) {
+	err = .None
 	expect_token(p, .Open_Bracket) or_return
 
 	array: Array
@@ -266,15 +268,14 @@ parse_object_body :: proc(p: ^Parser, end_token: Token_Kind) -> (obj: Object, er
 			break
 		}
 	}	
-	return
+	return obj, .None
 }
 
 parse_object :: proc(p: ^Parser) -> (value: Value, err: Error) {
 	expect_token(p, .Open_Brace) or_return
 	obj := parse_object_body(p, .Close_Brace) or_return
 	expect_token(p, .Close_Brace) or_return
-	value = obj
-	return
+	return obj, .None
 }