llvm/libcxx/test/std/utilities/allocator.adaptor/allocator.adaptor.cnstr/allocs.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

// <scoped_allocator>

// template <class OuterAlloc, class... InnerAllocs>
//   class scoped_allocator_adaptor

// template <class OuterA2>
//   scoped_allocator_adaptor(OuterA2&& outerAlloc,
//                            const InnerAllocs& ...innerAllocs);

#include <scoped_allocator>
#include <cassert>

#include "test_macros.h"
#include "allocators.h"

int main(int, char**) {
  {
    typedef std::scoped_allocator_adaptor<A1<int>> A;
    A1<int> a3(3);
    A a(a3);
    assert(a.outer_allocator() == A1<int>(3));
    assert(a.inner_allocator() == a);
    assert(A1<int>::copy_called == true);
    assert(A1<int>::move_called == false);
  }
  A1<int>::copy_called = false;
  {
    typedef std::scoped_allocator_adaptor<A1<int>> A;
    A a(A1<int>(3));
    assert(a.outer_allocator() == A1<int>(3));
    assert(a.inner_allocator() == a);
    assert(A1<int>::copy_called == false);
    assert(A1<int>::move_called == true);
  }
  A1<int>::move_called = false;
  {
    typedef std::scoped_allocator_adaptor<A1<int>, A2<int>> A;
    A1<int> a4(4);
    A a(a4, A2<int>(5));
    assert(A1<int>::copy_called == true);
    assert(A1<int>::move_called == false);
    assert(A2<int>::copy_called == true);
    assert(A2<int>::move_called == false);
    assert(a.outer_allocator() == A1<int>(4));
    assert(a.inner_allocator() == std::scoped_allocator_adaptor<A2<int>>(A2<int>(5)));
  }
  A1<int>::copy_called = false;
  A1<int>::move_called = false;
  A2<int>::copy_called = false;
  A2<int>::move_called = false;
  {
    typedef std::scoped_allocator_adaptor<A1<int>, A2<int>> A;
    A a(A1<int>(4), A2<int>(5));
    assert(A1<int>::copy_called == false);
    assert(A1<int>::move_called == true);
    assert(A2<int>::copy_called == true);
    assert(A2<int>::move_called == false);
    assert(a.outer_allocator() == A1<int>(4));
    assert(a.inner_allocator() == std::scoped_allocator_adaptor<A2<int>>(A2<int>(5)));
  }
  A1<int>::copy_called = false;
  A1<int>::move_called = false;
  A2<int>::copy_called = false;
  A2<int>::move_called = false;
  A1<int>::move_called = false;
  {
    typedef std::scoped_allocator_adaptor<A1<int>, A2<int>, A3<int>> A;
    A1<int> a4(4);
    A a(a4, A2<int>(5), A3<int>(6));
    assert(A1<int>::copy_called == true);
    assert(A1<int>::move_called == false);
    assert(A2<int>::copy_called == true);
    assert(A2<int>::move_called == false);
    assert(A3<int>::copy_called == true);
    assert(A3<int>::move_called == false);
    assert(a.outer_allocator() == A1<int>(4));
    assert((a.inner_allocator() == std::scoped_allocator_adaptor<A2<int>, A3<int>>(A2<int>(5), A3<int>(6))));
  }
  A1<int>::copy_called = false;
  A1<int>::move_called = false;
  A2<int>::copy_called = false;
  A2<int>::move_called = false;
  A3<int>::copy_called = false;
  A3<int>::move_called = false;
  {
    typedef std::scoped_allocator_adaptor<A1<int>, A2<int>, A3<int>> A;
    A a(A1<int>(4), A2<int>(5), A3<int>(6));
    assert(A1<int>::copy_called == false);
    assert(A1<int>::move_called == true);
    assert(A2<int>::copy_called == true);
    assert(A2<int>::move_called == false);
    assert(A3<int>::copy_called == true);
    assert(A3<int>::move_called == false);
    assert(a.outer_allocator() == A1<int>(4));
    assert((a.inner_allocator() == std::scoped_allocator_adaptor<A2<int>, A3<int>>(A2<int>(5), A3<int>(6))));
  }
  {
    //  Test for LWG2782
    static_assert(!std::is_convertible<A1<int>, A2<int>>::value, "");
    static_assert(
        !std::is_convertible< std::scoped_allocator_adaptor<A1<int>>, std::scoped_allocator_adaptor<A2<int>>>::value,
        "");
  }
  {
    // Test construction from convertible-to-allocator types (https://github.com/llvm/llvm-project/issues/78754)
    typedef std::scoped_allocator_adaptor<A1<int>, A1<int>> A;
    A a(A1<char>(4), A1<char>(5));
    assert(a.outer_allocator() == A1<int>(4));
    assert(a.inner_allocator() == A1<int>(5));
  }

  return 0;
}