xref: /llvm-project-15.0.7/libcxx/test/std/strings/basic.string/string.cons/move.pass.cpp (revision 1cf41139)

//===----------------------------------------------------------------------===//
//
// 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

// <string>

// basic_string(basic_string<charT,traits,Allocator>&& str); // constexpr since C++20

#include <string>
#include <cassert>

#include "test_macros.h"
#include "test_allocator.h"
#include "min_allocator.h"

template <class S>
TEST_CONSTEXPR_CXX20 void
test(S s0)
{
    S s1 = s0;
    S s2 = std::move(s0);
    LIBCPP_ASSERT(s2.__invariants());
    LIBCPP_ASSERT(s0.__invariants());
    assert(s2 == s1);
    assert(s2.capacity() >= s2.size());
    assert(s2.get_allocator() == s1.get_allocator());
}

TEST_CONSTEXPR_CXX20 bool test() {
  {
    typedef test_allocator<char> A;
    typedef std::basic_string<char, std::char_traits<char>, A> S;
    test(S(A(3)));
    test(S("1", A(5)));
    test(S("1234567890123456789012345678901234567890123456789012345678901234567890", A(7)));
  }
  {
    typedef min_allocator<char> A;
    typedef std::basic_string<char, std::char_traits<char>, A> S;
    test(S(A{}));
    test(S("1", A()));
    test(S("1234567890123456789012345678901234567890123456789012345678901234567890", A()));
  }

  return true;
}

int main(int, char**)
{
  test();
#if TEST_STD_VER > 17
  static_assert(test());
#endif

  return 0;
}