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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
// <list>
// template <class... Args> reference emplace_front(Args&&... args);
// return type is 'reference' in C++17; 'void' before
#include <list>
#include <cassert>
#include "test_macros.h"
#include "min_allocator.h"
class A
{
int i_;
double d_;
A(const A&);
A& operator=(const A&);
public:
A(int i, double d)
: i_(i), d_(d) {}
int geti() const {return i_;}
double getd() const {return d_;}
};
int main(int, char**)
{
{
std::list<A> c;
#if TEST_STD_VER > 14
A& r1 = c.emplace_front(2, 3.5);
assert(c.size() == 1);
assert(&r1 == &c.front());
assert(c.front().geti() == 2);
assert(c.front().getd() == 3.5);
A& r2 = c.emplace_front(3, 4.5);
assert(c.size() == 2);
assert(&r2 == &c.front());
#else
c.emplace_front(2, 3.5);
assert(c.size() == 1);
assert(c.front().geti() == 2);
assert(c.front().getd() == 3.5);
c.emplace_front(3, 4.5);
assert(c.size() == 2);
#endif
assert(c.front().geti() == 3);
assert(c.front().getd() == 4.5);
assert(c.back().geti() == 2);
assert(c.back().getd() == 3.5);
}
{
std::list<A, min_allocator<A>> c;
#if TEST_STD_VER > 14
A& r1 = c.emplace_front(2, 3.5);
assert(c.size() == 1);
assert(&r1 == &c.front());
assert(c.front().geti() == 2);
assert(c.front().getd() == 3.5);
A& r2 = c.emplace_front(3, 4.5);
assert(c.size() == 2);
assert(&r2 == &c.front());
#else
c.emplace_front(2, 3.5);
assert(c.size() == 1);
assert(c.front().geti() == 2);
assert(c.front().getd() == 3.5);
c.emplace_front(3, 4.5);
assert(c.size() == 2);
#endif
assert(c.front().geti() == 3);
assert(c.front().getd() == 4.5);
assert(c.back().geti() == 2);
assert(c.back().getd() == 3.5);
}
return 0;
}
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