1//===----------------------------------------------------------------------===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is dual licensed under the MIT and the University of Illinois Open 6// Source Licenses. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9 10// <functional> 11 12// template <class Fn> 13// class binder1st 14// : public unary_function<typename Fn::second_argument_type, typename Fn::result_type> 15// { 16// protected: 17// Fn op; 18// typename Fn::first_argument_type value; 19// public: 20// binder2nd(const Fn& x, const typename Fn::second_argument_type& y); 21// 22// typename Fn::result_type operator()(const typename Fn::first_argument_type& x) const; 23// typename Fn::result_type operator()(typename Fn::first_argument_type& x) const; 24// }; 25 26#include <functional> 27#include <type_traits> 28#include <cassert> 29 30#include "../test_func.h" 31 32class test 33 : public std::binder1st<test_func> 34{ 35 typedef std::binder1st<test_func> base; 36public: 37 test() : std::binder1st<test_func>(test_func(2), 30) {} 38 39 void do_test() 40 { 41 static_assert((std::is_base_of< 42 std::unary_function<test_func::second_argument_type, 43 test_func::result_type>, 44 test>::value), ""); 45 assert(op.id() == 2); 46 assert(value == 30); 47 48 double d = 5; 49 assert((*this)(d) == 35); 50 assert((*this)(5) == 25); 51 } 52}; 53 54int main() 55{ 56 test t; 57 t.do_test(); 58} 59