libcxx/test/utilities/utility/utility.swap/swap_array.pass.cpp

//===----------------------------------------------------------------------===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is dual licensed under the MIT and the University of Illinois Open
// Source Licenses. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//

// <utility>

// template<ValueType T, size_t N>
//   requires Swappable<T>
//   void
//   swap(T (&a)[N], T (&b)[N]);

#include <utility>
#include <cassert>
#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
#include <memory>
#endif

void
test()
{
    int i[3] = {1, 2, 3};
    int j[3] = {4, 5, 6};
    std::swap(i, j);
    assert(i[0] == 4);
    assert(i[1] == 5);
    assert(i[2] == 6);
    assert(j[0] == 1);
    assert(j[1] == 2);
    assert(j[2] == 3);
}

#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES

void
test1()
{
    std::unique_ptr<int> i[3];
    for (int k = 0; k < 3; ++k)
        i[k].reset(new int(k+1));
    std::unique_ptr<int> j[3];
    for (int k = 0; k < 3; ++k)
        j[k].reset(new int(k+4));
    std::swap(i, j);
    assert(*i[0] == 4);
    assert(*i[1] == 5);
    assert(*i[2] == 6);
    assert(*j[0] == 1);
    assert(*j[1] == 2);
    assert(*j[2] == 3);
}

#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES

int main()
{
    test();
#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
    test1();
#endif
}