libcxx/test/std/input.output/string.streams/helper_concepts.h

   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-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 #ifndef TEST_STD_INPUTOUTPUT_STRINGSTREAMS_HELPER_CONCEPTS_H
  10 #define TEST_STD_INPUTOUTPUT_STRINGSTREAMS_HELPER_CONCEPTS_H
  11
  12 template <typename S, typename T>
  13 concept 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_H