// Copyright (C) 2016-2022 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
// .
// { dg-do compile { target c++11 } }
// { dg-require-effective-target hosted }
#include
template
struct resettable
: std::false_type
{ };
template struct type_list { };
template
using reset_result
= decltype(std::shared_ptr{}.reset(std::declval()...));
template
struct resettable, reset_result>
: std::true_type
{ };
template
constexpr bool can_reset()
{ return resettable>::value; }
template
struct Deleter {
void operator()(T*) const;
};
template
using Alloc = std::allocator;
struct Base { };
struct Derived : Base { };
// Positive cases:
static_assert( can_reset(),
"void* convertible to const void*");
static_assert( can_reset(),
"int* convertible to const int*");
static_assert( can_reset(),
"Derived* convertible to Base*");
static_assert( can_reset(),
"Derived* convertible to const Base*");
// Negative cases:
static_assert( !can_reset(),
"void* not convertible to int*");
static_assert( !can_reset>(),
"void* not convertible to int*");
static_assert( !can_reset, Alloc>(),
"void* not convertible to int*");
static_assert( !can_reset(),
"const int* not convertible to int*");
static_assert( !can_reset>(),
"const int* not convertible to int*");
static_assert( !can_reset, Alloc>(),
"const int* not convertible to int*");
static_assert( !can_reset(),
"long* not convertible to int*");
static_assert( !can_reset>(),
"long* not convertible to int*");
static_assert( !can_reset, Alloc>(),
"long* not convertible to int*");
static_assert( !can_reset(),
"Base* not convertible to Derived*");
static_assert( !can_reset>(),
"Base* not convertible to Derived*");
static_assert( !can_reset, Alloc>(),
"Base* not convertible to Derived*");