stage1 更多的语义及其附属基础设施

stage1/spl_sema.h

@@ -43,6 +43,8 @@ typedef struct {
     spl_scope_t *scope;
     spl_symbol_t root;
     int error_count;
+    spl_scope_id_t store_scope;
+    spl_type_id_t current_fn_ret_tid; // TODO
 } spl_sema_t;
 
 void spl_sema_init(spl_sema_t *sema, spl_ast_t *ast, spl_type_t *type, spl_scope_t *scope);