| //===----------------------------------------------------------------------===// |
| // |
| // 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 |
| |
| // <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(int, char**) |
| { |
| { |
| 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); |
| } |
| |
| return 0; |
| } |