18 lines · c
1//===----------------------------------------------------------------------===//2//3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.4// See https://llvm.org/LICENSE.txt for license information.5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception6//7//===----------------------------------------------------------------------===//8 9#ifndef TEST_STD_INPUTOUTPUT_STRINGSTREAMS_HELPER_CONCEPTS_H10#define TEST_STD_INPUTOUTPUT_STRINGSTREAMS_HELPER_CONCEPTS_H11 12template <typename S, typename T>13concept is_valid_argument_for_str_member = requires(S s, const T& sv) {14 { s.str(sv) };15};16 17#endif // TEST_STD_INPUTOUTPUT_STRINGSTREAMS_HELPER_CONCEPTS_H18