cxx/test/utilities/function.objects/arithmetic.operations/negate.pass.cpp
2013-07-29 14:21:53 +00:00

32 lines
797 B
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_base_of<std::unary_function<int, int>, F>::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);
#endif
}