// Copyright 2023 The Chromium Authors // Use of this source code is governed by a BSD-style license that can be // found in the LICENSE file. #ifndef BASE_MACROS_IS_EMPTY_H_ #define BASE_MACROS_IS_EMPTY_H_ // A macro that substitutes with 1 if called without arguments, otherwise 0. #define BASE_IS_EMPTY(...) BASE_INTERNAL_IS_##__VA_OPT__(NON_)##EMPTY #define BASE_INTERNAL_IS_EMPTY 1 #define BASE_INTERNAL_IS_NON_EMPTY 0 #endif // BASE_MACROS_IS_EMPTY_H_