Allow for comma-separate json names `json:"name,flag"`

core/encoding/json/marshal.odin

@@ -371,6 +371,7 @@ marshal_to_writer :: proc(w: io.Writer, v: any, opt: ^Marshal_Options) -> (err:
 			info := ti.variant.(runtime.Type_Info_Struct)
 			for name, i in info.names {
 				json_name := reflect.struct_tag_get(reflect.Struct_Tag(info.tags[i]), "json")
+				json_name = json_name_from_tag_value(json_name)
 
 				opt_write_iteration(w, opt, i) or_return
 				if json_name != "" {

core/encoding/json/unmarshal.odin

@@ -343,6 +343,15 @@ unmarshal_expect_token :: proc(p: ^Parser, kind: Token_Kind, loc := #caller_loca
 	return prev
 }
 
+@(private)
+json_name_from_tag_value :: proc(value: string) -> (json_name: string) {
+	json_name = value
+	if comma_index := strings.index_byte(json_name, ','); comma_index >= 0 {
+		json_name = json_name[:comma_index]
+	}
+	return
+}
+
 
 @(private)
 unmarshal_object :: proc(p: ^Parser, v: any, end_token: Token_Kind) -> (err: Unmarshal_Error) {
@@ -384,7 +393,7 @@ unmarshal_object :: proc(p: ^Parser, v: any, end_token: Token_Kind) -> (err: Unm
 			
 			for field, field_idx in fields {
 				tag_value := string(reflect.struct_tag_get(field.tag, "json"))
-				if key == tag_value {
+				if key == json_name_from_tag_value(tag_value) {
 					use_field_idx = field_idx
 					break
 				}