Abseil Common Libraries (C++) (grcp 依赖)
https://abseil.io/
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
44 lines
1.4 KiB
44 lines
1.4 KiB
// Copyright 2022 The Abseil Authors. |
|
// |
|
// Licensed under the Apache License, Version 2.0 (the "License"); |
|
// you may not use this file except in compliance with the License. |
|
// You may obtain a copy of the License at |
|
// |
|
// https://www.apache.org/licenses/LICENSE-2.0 |
|
// |
|
// Unless required by applicable law or agreed to in writing, software |
|
// distributed under the License is distributed on an "AS IS" BASIS, |
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
|
// See the License for the specific language governing permissions and |
|
// limitations under the License. |
|
// |
|
// ----------------------------------------------------------------------------- |
|
// File: log/internal/voidify.h |
|
// ----------------------------------------------------------------------------- |
|
// |
|
// This class is used to explicitly ignore values in the conditional logging |
|
// macros. This avoids compiler warnings like "value computed is not used" and |
|
// "statement has no effect". |
|
|
|
#ifndef ABSL_LOG_INTERNAL_VOIDIFY_H_ |
|
#define ABSL_LOG_INTERNAL_VOIDIFY_H_ |
|
|
|
#include "absl/base/config.h" |
|
|
|
namespace absl { |
|
ABSL_NAMESPACE_BEGIN |
|
namespace log_internal { |
|
|
|
class Voidify final { |
|
public: |
|
// This has to be an operator with a precedence lower than << but higher than |
|
// ?: |
|
template <typename T> |
|
void operator&&(const T&) const&& {} |
|
}; |
|
|
|
} // namespace log_internal |
|
ABSL_NAMESPACE_END |
|
} // namespace absl |
|
|
|
#endif // ABSL_LOG_INTERNAL_VOIDIFY_H_
|
|
|