xref: /llvm-project-15.0.7/libcxx/test/std/containers/associative/multimap/multimap.modifiers/insert_iter_cv.pass.cpp (revision 3b966c1f)

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

// <map>

// class multimap

// iterator insert(const_iterator position, const value_type& v);

#include <map>
#include <cassert>

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

template <class Container>
void do_insert_hint_test()
{
    typedef Container M;
    typedef typename M::iterator R;
    typedef typename M::value_type VT;
    M m;
    const VT v1(2, 2.5);
    R r = m.insert(m.end(), v1);
    assert(r == m.begin());
    assert(m.size() == 1);
    assert(r->first == 2);
    assert(r->second == 2.5);

    const VT v2(1, 1.5);
    r = m.insert(m.end(), v2);
    assert(r == m.begin());
    assert(m.size() == 2);
    assert(r->first == 1);
    assert(r->second == 1.5);

    const VT v3(3, 3.5);
    r = m.insert(m.end(), v3);
    assert(r == std::prev(m.end()));
    assert(m.size() == 3);
    assert(r->first == 3);
    assert(r->second == 3.5);

    const VT v4(3, 4.5);
    r = m.insert(std::prev(m.end()), v4);
    assert(r == std::prev(m.end(), 2));
    assert(m.size() == 4);
    assert(r->first == 3);
    assert(r->second == 4.5);
}

int main(int, char**)
{
    do_insert_hint_test<std::multimap<int, double> >();
#if TEST_STD_VER >= 11
    {
        typedef std::multimap<int, double, std::less<int>, min_allocator<std::pair<const int, double>>> M;
        do_insert_hint_test<M>();
    }
#endif

  return 0;
}