llvm/libcxx/test/std/iterators/iterator.requirements/alg.req.ind.copy/indirectly_copyable.subsumption.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

// template<class In, class Out>
// concept indirectly_copyable;

#include <iterator>

template<std::indirectly_readable I, class O>
constexpr bool indirectly_copyable_subsumption() {
  return false;
}

template<class I, class O>
  requires std::indirectly_copyable<I, O>
constexpr bool indirectly_copyable_subsumption() {
  return true;
}

static_assert(indirectly_copyable_subsumption<int*, int*>());