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base / types / supports_ostream_operator.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_TYPES_SUPPORTS_OSTREAM_OPERATOR_H_
#define BASE_TYPES_SUPPORTS_OSTREAM_OPERATOR_H_
#include <ostream>
#include <type_traits>
#include <utility>
namespace base::internal {
// Detects whether using operator<< would work.
//
// Note that the above #include of <ostream> is necessary to guarantee
// consistent results here for basic types.
template <typename T>
concept SupportsOstreamOperator =
requires(const T& t, std::ostream& os) { os << t; };
} // namespace base::internal
#endif // BASE_TYPES_SUPPORTS_OSTREAM_OPERATOR_H_