1 //===----------------------------------------------------------------------===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 // UNSUPPORTED: c++98, c++03 10 11 // <functional> 12 13 // template<CopyConstructible Fn, CopyConstructible... Types> 14 // unspecified bind(Fn, Types...); 15 // template<Returnable R, CopyConstructible Fn, CopyConstructible... Types> 16 // unspecified bind(Fn, Types...); 17 18 // https://bugs.llvm.org/show_bug.cgi?id=16343 19 20 #include <cmath> 21 #include <functional> 22 #include <cassert> 23 24 struct power 25 { 26 template <typename T> 27 T 28 operator()(T a, T b) 29 { 30 return static_cast<T>(std::pow(a, b)); 31 } 32 }; 33 34 struct plus_one 35 { 36 template <typename T> 37 T 38 operator()(T a) 39 { 40 return a + 1; 41 } 42 }; 43 44 int main() 45 { 46 using std::placeholders::_1; 47 48 auto g = std::bind(power(), 2, _1); 49 assert(g(5) == 32); 50 assert(std::bind(plus_one(), g)(5) == 33); 51 } 52