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base / macros / is_empty.h [blame]
// 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_EMPTY_EXPANDED(__VA_ARGS__)
#define BASE_INTERNAL_IS_EMPTY_EXPANDED(...) \
BASE_INTERNAL_IS_EMPTY_INNER(_, ##__VA_ARGS__)
#define BASE_INTERNAL_IS_EMPTY_INNER(...) \
BASE_INTERNAL_IS_EMPTY_INNER_EXPANDED(__VA_ARGS__, 0, 1)
#define BASE_INTERNAL_IS_EMPTY_INNER_EXPANDED(e0, e1, is_empty, ...) is_empty
#endif // BASE_MACROS_IS_EMPTY_H_