Merge pull request #3215 from blob1807/json-better-enum-support

core:encoding/json Add support for writing enum value names

core/encoding/json/marshal.odin

@@ -51,6 +51,11 @@ Marshal_Options :: struct {
 	// NOTE: This will temp allocate and sort a list for each map.
 	sort_maps_by_key: bool,
 
+	// Output enum value's name instead of its underlying value.
+	//
+	// NOTE: If a name isn't found it'll use the underlying value.
+	use_enum_names: bool,
+
 	// Internal state
 	indentation: int,
 	mjson_skipped_first_braces_start: bool,
@@ -411,7 +416,16 @@ marshal_to_writer :: proc(w: io.Writer, v: any, opt: ^Marshal_Options) -> (err:
 		}
 
 	case runtime.Type_Info_Enum:
-		return marshal_to_writer(w, any{v.data, info.base.id}, opt)
+		if !opt.use_enum_names || len(info.names) == 0 {
+			return marshal_to_writer(w, any{v.data, info.base.id}, opt)
+		} else {
+			name, found := reflect.enum_name_from_value_any(v)
+			if found {
+				return marshal_to_writer(w, name, opt)
+			} else {
+				return marshal_to_writer(w, any{v.data, info.base.id}, opt)
+			}
+		}
 
 	case runtime.Type_Info_Bit_Set:
 		is_bit_set_different_endian_to_platform :: proc(ti: ^runtime.Type_Info) -> bool {