stage1 支持聚合类型方法

stage1/spl_sema.h

@@ -47,7 +47,8 @@ typedef struct {
     int error_count;
     spl_scope_id_t store_scope;
     spl_attr_t *attr;
-    spl_type_id_t current_fn_ret_tid; // TODO
+    spl_lang_type_id_t current_aggregate_lang;
+    spl_lang_type_id_t current_fn_ret_tid;
 } spl_sema_t;
 
 void spl_sema_init(spl_sema_t *sema, spl_ast_t *ast, spl_type_t *type, spl_scope_t *scope,