53 lines
2.0 KiB
C++
53 lines
2.0 KiB
C++
// { dg-options "-std=gnu++17" }
|
|
// { dg-do compile }
|
|
|
|
// Copyright (C) 2016-2020 Free Software Foundation, Inc.
|
|
//
|
|
// This file is part of the GNU ISO C++ Library. This library is free
|
|
// software; you can redistribute it and/or modify it under the
|
|
// terms of the GNU General Public License as published by the
|
|
// Free Software Foundation; either version 3, or (at your option)
|
|
// any later version.
|
|
|
|
// This library is distributed in the hope that it will be useful,
|
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
// GNU General Public License for more details.
|
|
|
|
// You should have received a copy of the GNU General Public License along
|
|
// with this library; see the file COPYING3. If not see
|
|
// <http://www.gnu.org/licenses/>.
|
|
|
|
#include <utility>
|
|
#include <type_traits>
|
|
#include <testsuite_hooks.h>
|
|
|
|
using std::in_place_t;
|
|
using std::in_place_type_t;
|
|
using std::in_place_index_t;
|
|
|
|
float f(in_place_type_t<float>);
|
|
double f(in_place_type_t<double>);
|
|
char f(in_place_index_t<0>);
|
|
unsigned int f(in_place_index_t<1>);
|
|
int f(in_place_t);
|
|
|
|
static_assert(std::is_same<decltype(f(std::in_place)), int>::value);
|
|
static_assert(std::is_same<decltype(f(std::in_place_type<float>)),
|
|
float>::value);
|
|
static_assert(std::is_same<decltype(f(std::in_place_type<double>)),
|
|
double>::value);
|
|
static_assert(std::is_same<decltype(f(std::in_place_index<0>)), char>::value);
|
|
static_assert(std::is_same<decltype(f(std::in_place_index<1>)),
|
|
unsigned int>::value);
|
|
|
|
template <class T, class... Args> float h(in_place_type_t<T>, Args&&...);
|
|
template <size_t N, class... Args> int h(in_place_index_t<N>, Args&&...);
|
|
template <class T> double h(in_place_t, T&&);
|
|
|
|
static_assert(std::is_same<decltype(h(std::in_place, 1)), double>::value);
|
|
static_assert(std::is_same<decltype(h(std::in_place_type<float>, 1)),
|
|
float>::value);
|
|
static_assert(std::is_same<decltype(h(std::in_place_index<0>, 1)),
|
|
int>::value);
|