emplace.pass.cpp
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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++98, c++03
// <set>
// class set
// template <class... Args>
// pair<iterator, bool> emplace(Args&&... args);
#include <set>
#include <cassert>
#include "test_macros.h"
#include "../../Emplaceable.h"
#include "DefaultOnly.h"
#include "min_allocator.h"
int main(int, char**)
{
{
typedef std::set<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() == DefaultOnly());
assert(DefaultOnly::count == 1);
r = m.emplace();
assert(!r.second);
assert(r.first == m.begin());
assert(m.size() == 1);
assert(*m.begin() == DefaultOnly());
assert(DefaultOnly::count == 1);
}
assert(DefaultOnly::count == 0);
{
typedef std::set<Emplaceable> M;
typedef std::pair<M::iterator, bool> R;
M m;
R r = m.emplace();
assert(r.second);
assert(r.first == m.begin());
assert(m.size() == 1);
assert(*m.begin() == Emplaceable());
r = m.emplace(2, 3.5);
assert(r.second);
assert(r.first == next(m.begin()));
assert(m.size() == 2);
assert(*r.first == Emplaceable(2, 3.5));
r = m.emplace(2, 3.5);
assert(!r.second);
assert(r.first == next(m.begin()));
assert(m.size() == 2);
assert(*r.first == Emplaceable(2, 3.5));
}
{
typedef std::set<int> M;
typedef std::pair<M::iterator, bool> R;
M m;
R r = m.emplace(M::value_type(2));
assert(r.second);
assert(r.first == m.begin());
assert(m.size() == 1);
assert(*r.first == 2);
}
{
typedef std::set<int, std::less<int>, min_allocator<int>> M;
typedef std::pair<M::iterator, bool> R;
M m;
R r = m.emplace(M::value_type(2));
assert(r.second);
assert(r.first == m.begin());
assert(m.size() == 1);
assert(*r.first == 2);
}
return 0;
}