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//===----------------------------------------------------------------------===//
//
// 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.
//
//===----------------------------------------------------------------------===//
// UNSUPPORTED: c++98, c++03
// <forward_list>
// template <class... Args> reference emplace_front(Args&&... args);
// return type is 'reference' in C++17; 'void' before
#include <forward_list>
#include <cassert>
#include "test_macros.h"
#include "../../../Emplaceable.h"
#include "min_allocator.h"
int main()
{
{
typedef Emplaceable T;
typedef std::forward_list<T> C;
C c;
#if TEST_STD_VER > 14
T& r1 = c.emplace_front();
assert(c.front() == Emplaceable());
assert(&r1 == &c.front());
assert(distance(c.begin(), c.end()) == 1);
T& r2 = c.emplace_front(1, 2.5);
assert(c.front() == Emplaceable(1, 2.5));
assert(&r2 == &c.front());
#else
c.emplace_front();
assert(c.front() == Emplaceable());
assert(distance(c.begin(), c.end()) == 1);
c.emplace_front(1, 2.5);
assert(c.front() == Emplaceable(1, 2.5));
#endif
assert(*next(c.begin()) == Emplaceable());
assert(distance(c.begin(), c.end()) == 2);
}
{
typedef Emplaceable T;
typedef std::forward_list<T, min_allocator<T>> C;
C c;
#if TEST_STD_VER > 14
T& r1 = c.emplace_front();
assert(c.front() == Emplaceable());
assert(&r1 == &c.front());
assert(distance(c.begin(), c.end()) == 1);
T& r2 = c.emplace_front(1, 2.5);
assert(c.front() == Emplaceable(1, 2.5));
assert(&r2 == &c.front());
#else
c.emplace_front();
assert(c.front() == Emplaceable());
assert(distance(c.begin(), c.end()) == 1);
c.emplace_front(1, 2.5);
assert(c.front() == Emplaceable(1, 2.5));
#endif
assert(*next(c.begin()) == Emplaceable());
assert(distance(c.begin(), c.end()) == 2);
}
}
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