87d03942c4
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@225402 91177308-0d34-0410-b5e6-96231b3b80d8
39 lines
1.0 KiB
C++
39 lines
1.0 KiB
C++
//===----------------------------------------------------------------------===//
|
|
//
|
|
// 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.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
// <functional>
|
|
|
|
// negate
|
|
|
|
#include <functional>
|
|
#include <type_traits>
|
|
#include <cassert>
|
|
|
|
int main()
|
|
{
|
|
typedef std::negate<int> F;
|
|
const F f = F();
|
|
static_assert((std::is_same<F::argument_type, int>::value), "" );
|
|
static_assert((std::is_same<F::result_type, int>::value), "" );
|
|
assert(f(36) == -36);
|
|
#if _LIBCPP_STD_VER > 11
|
|
typedef std::negate<> F2;
|
|
const F2 f2 = F2();
|
|
assert(f2(36) == -36);
|
|
assert(f2(36L) == -36);
|
|
assert(f2(36.0) == -36);
|
|
|
|
constexpr int foo = std::negate<int> () (3);
|
|
static_assert ( foo == -3, "" );
|
|
|
|
constexpr int bar = std::negate<> () (3.0);
|
|
static_assert ( bar == -3, "" );
|
|
#endif
|
|
}
|