1c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant//===----------------------------------------------------------------------===// 2c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant// 3c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant// The LLVM Compiler Infrastructure 4c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant// 5b64f8b07c104c6cc986570ac8ee0ed16a9f23976Howard Hinnant// This file is dual licensed under the MIT and the University of Illinois Open 6b64f8b07c104c6cc986570ac8ee0ed16a9f23976Howard Hinnant// Source Licenses. See LICENSE.TXT for details. 7c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant// 8c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant//===----------------------------------------------------------------------===// 9c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant 10c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant// <functional> 11c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant 12c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant// negate 13c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant 14c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant#include <functional> 15c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant#include <type_traits> 16c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant#include <cassert> 17c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant 18c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnantint main() 19c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant{ 20c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant typedef std::negate<int> F; 21c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant const F f = F(); 22c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant static_assert((std::is_base_of<std::unary_function<int, int>, F>::value), ""); 23c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant assert(f(36) == -36); 24ff46409221ea91df3c5413ba06eed2f6ba963444Marshall Clow#if _LIBCPP_STD_VER > 11 25ff46409221ea91df3c5413ba06eed2f6ba963444Marshall Clow typedef std::negate<> F2; 26ff46409221ea91df3c5413ba06eed2f6ba963444Marshall Clow const F2 f2 = F2(); 27ff46409221ea91df3c5413ba06eed2f6ba963444Marshall Clow assert(f2(36) == -36); 28ff46409221ea91df3c5413ba06eed2f6ba963444Marshall Clow assert(f2(36L) == -36); 29ff46409221ea91df3c5413ba06eed2f6ba963444Marshall Clow assert(f2(36.0) == -36); 309738cafa4f5c5ce19cd674e7e8c38376eaac8abeMarshall Clow 319738cafa4f5c5ce19cd674e7e8c38376eaac8abeMarshall Clow constexpr int foo = std::negate<int> () (3); 329738cafa4f5c5ce19cd674e7e8c38376eaac8abeMarshall Clow static_assert ( foo == -3, "" ); 339738cafa4f5c5ce19cd674e7e8c38376eaac8abeMarshall Clow 349738cafa4f5c5ce19cd674e7e8c38376eaac8abeMarshall Clow constexpr int bar = std::negate<> () (3.0); 359738cafa4f5c5ce19cd674e7e8c38376eaac8abeMarshall Clow static_assert ( bar == -3, "" ); 36ff46409221ea91df3c5413ba06eed2f6ba963444Marshall Clow#endif 37c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant} 38