llvm/libcxx/test/std/iterators/predef.iterators/move.iterators/move.sentinel/constraints.compile.pass.cpp

//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//

// UNSUPPORTED: c++03, c++11, c++14, c++17

// <iterator>

// template<semiregular S>
//   class move_sentinel;

#include <iterator>

template<class T>
concept HasMoveSentinel = requires {
  typename std::move_sentinel<T>;
};

struct Semiregular {};

struct NotSemiregular {
  NotSemiregular(int);
};

static_assert( HasMoveSentinel<int>);
static_assert( HasMoveSentinel<int*>);
static_assert( HasMoveSentinel<Semiregular>);
static_assert(!HasMoveSentinel<NotSemiregular>);