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//===----------------------------------------------------------------------===//
//
// 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
// <set>
// class multiset
// template <class... Args>
// iterator emplace(Args&&... args);
#include <cassert>
#include <set>
#include "../../Emplaceable.h"
#include "DefaultOnly.h"
#include "MoveOnly.h"
#include "min_allocator.h"
int main(int, char**) {
{
typedef std::multiset<DefaultOnly> M;
typedef M::iterator R;
M m;
assert(DefaultOnly::count == 0);
R r = m.emplace();
assert(r == m.begin());
assert(m.size() == 1);
assert(*m.begin() == DefaultOnly());
assert(DefaultOnly::count == 1);
r = m.emplace();
assert(r == std::next(m.begin()));
assert(m.size() == 2);
assert(*m.begin() == DefaultOnly());
assert(DefaultOnly::count == 2);
}
assert(DefaultOnly::count == 0);
{
typedef std::multiset<Emplaceable> M;
typedef M::iterator R;
M m;
R r = m.emplace();
assert(r == m.begin());
assert(m.size() == 1);
assert(*m.begin() == Emplaceable());
r = m.emplace(2, 3.5);
assert(r == std::next(m.begin()));
assert(m.size() == 2);
assert(*r == Emplaceable(2, 3.5));
r = m.emplace(2, 3.5);
assert(r == std::next(m.begin(), 2));
assert(m.size() == 3);
assert(*r == Emplaceable(2, 3.5));
}
{
typedef std::multiset<int> M;
typedef M::iterator R;
M m;
R r = m.emplace(M::value_type(2));
assert(r == m.begin());
assert(m.size() == 1);
assert(*r == 2);
}
{
typedef std::multiset<int, std::less<int>, min_allocator<int>> M;
typedef M::iterator R;
M m;
R r = m.emplace(M::value_type(2));
assert(r == m.begin());
assert(m.size() == 1);
assert(*r == 2);
}
{ // We're unwrapping pairs for `{,multi}map`. Make sure we're not trying to do that for multiset.
using Set = std::multiset<std::pair<MoveOnly, MoveOnly>>;
Set set;
auto iter = set.emplace(std::pair<MoveOnly, MoveOnly>(2, 4));
assert(set.begin() == iter);
}
return 0;
}
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