blob: 198894023cd795f6bde9f657e4734f8da860a704 [file] [log] [blame]
//===----------------------------------------------------------------------===//
//
// 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>
#include "test_macros.h"
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 TEST_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 double bar = std::negate<> () (3.0);
static_assert ( bar == -3.0, "" );
#endif
}