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// greater 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::greater<int> F; 21c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant const F f = F(); 22c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant static_assert((std::is_base_of<std::binary_function<int, int, bool>, F>::value), ""); 23c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant assert(!f(36, 36)); 24c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant assert(f(36, 6)); 25c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant assert(!f(6, 36)); 26ff46409221ea91df3c5413ba06eed2f6ba963444Marshall Clow#if _LIBCPP_STD_VER > 11 27ff46409221ea91df3c5413ba06eed2f6ba963444Marshall Clow typedef std::greater<> F2; 28ff46409221ea91df3c5413ba06eed2f6ba963444Marshall Clow const F2 f2 = F2(); 29ff46409221ea91df3c5413ba06eed2f6ba963444Marshall Clow assert(!f2(36, 36)); 30ff46409221ea91df3c5413ba06eed2f6ba963444Marshall Clow assert(f2(36, 6)); 31ff46409221ea91df3c5413ba06eed2f6ba963444Marshall Clow assert(!f2(6, 36)); 32ff46409221ea91df3c5413ba06eed2f6ba963444Marshall Clow assert( f2(36, 6.0)); 33ff46409221ea91df3c5413ba06eed2f6ba963444Marshall Clow assert( f2(36.0, 6)); 34ff46409221ea91df3c5413ba06eed2f6ba963444Marshall Clow assert(!f2(6, 36.0)); 35ff46409221ea91df3c5413ba06eed2f6ba963444Marshall Clow assert(!f2(6.0, 36)); 369738cafa4f5c5ce19cd674e7e8c38376eaac8abeMarshall Clow 379738cafa4f5c5ce19cd674e7e8c38376eaac8abeMarshall Clow constexpr bool foo = std::greater<int> () (36, 36); 389738cafa4f5c5ce19cd674e7e8c38376eaac8abeMarshall Clow static_assert ( !foo, "" ); 399738cafa4f5c5ce19cd674e7e8c38376eaac8abeMarshall Clow 409738cafa4f5c5ce19cd674e7e8c38376eaac8abeMarshall Clow constexpr bool bar = std::greater<> () (36.0, 36); 419738cafa4f5c5ce19cd674e7e8c38376eaac8abeMarshall Clow static_assert ( !bar, "" ); 42ff46409221ea91df3c5413ba06eed2f6ba963444Marshall Clow#endif 43c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant} 44