test/containers/associative/map/map.modifiers/emplace.pass.cpp

//===----------------------------------------------------------------------===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//

// <map>

// class map

// template <class... Args>
//   pair<iterator, bool> emplace(Args&&... args);

#include <map>
#include <cassert>

#include "../../../Emplaceable.h"
#include "../../../DefaultOnly.h"

int main()
{
#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
    {
        typedef std::map<int, DefaultOnly> M;
        typedef std::pair<M::iterator, bool> R;
        M m;
        assert(DefaultOnly::count == 0);
        R r = m.emplace();
        assert(r.second);
        assert(r.first == m.begin());
        assert(m.size() == 1);
        assert(m.begin()->first == 0);
        assert(m.begin()->second == DefaultOnly());
        assert(DefaultOnly::count == 1);
        r = m.emplace(1);
        assert(r.second);
        assert(r.first == next(m.begin()));
        assert(m.size() == 2);
        assert(next(m.begin())->first == 1);
        assert(next(m.begin())->second == DefaultOnly());
        assert(DefaultOnly::count == 2);
        r = m.emplace(1);
        assert(!r.second);
        assert(r.first == next(m.begin()));
        assert(m.size() == 2);
        assert(next(m.begin())->first == 1);
        assert(next(m.begin())->second == DefaultOnly());
        assert(DefaultOnly::count == 2);
    }
    assert(DefaultOnly::count == 0);
    {
        typedef std::map<int, Emplaceable> M;
        typedef std::pair<M::iterator, bool> R;
        M m;
        R r = m.emplace(2);
        assert(r.second);
        assert(r.first == m.begin());
        assert(m.size() == 1);
        assert(m.begin()->first == 2);
        assert(m.begin()->second == Emplaceable());
        r = m.emplace(1, 2, 3.5);
        assert(r.second);
        assert(r.first == m.begin());
        assert(m.size() == 2);
        assert(m.begin()->first == 1);
        assert(m.begin()->second == Emplaceable(2, 3.5));
        r = m.emplace(1, 2, 3.5);
        assert(!r.second);
        assert(r.first == m.begin());
        assert(m.size() == 2);
        assert(m.begin()->first == 1);
        assert(m.begin()->second == Emplaceable(2, 3.5));
    }
    {
        typedef std::map<int, double> M;
        typedef std::pair<M::iterator, bool> R;
        M m;
        R r = m.emplace(M::value_type(2, 3.5));
        assert(r.second);
        assert(r.first == m.begin());
        assert(m.size() == 1);
        assert(m.begin()->first == 2);
        assert(m.begin()->second == 3.5);
    }
#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
}