stage1 禁止隐式调用 修复bug

stage1/spl_expr.c

@@ -922,7 +922,10 @@ static spl_expr_result_t parse_postfix_expr(spl_comp_t *ctx, spl_expr_result_t l
                                 spl_comp_error(ctx, "cannot call instance method '%s' on type",
                                                fname);
                             }
-                            nargs = 1;
+                            /* Drop implicit self from left operand — user passes
+                             * self explicitly as first argument */
+                            spl_emit(ctx, SPL_DROP, SPL_VOID, 0);
+                            nargs = 0;
                         }
 
                         nargs += parse_call_args(ctx);
@@ -1246,9 +1249,8 @@ void spl_emit_ret(spl_comp_t *ctx, spl_type_info_t *ret_type) {
     if (ret_type) {
         if (ret_type->kind == TYPE_BASIC) {
             rt = ret_type->basic_type;
-        } else if (ret_type->kind == TYPE_PTR) {
-            rt = SPL_PTR;
-        } else if (spl_type_size(ret_type) <= sizeof(spl_val_t)) {
+        } else {
+            /* Pointer, struct, enum, etc: return address of value */
             rt = SPL_PTR;
         }
     }