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      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 // UNSUPPORTED: c++98, c++03
     11 
     12 // <functional>
     13 
     14 // template<CopyConstructible Fn, CopyConstructible... Types>
     15 //   unspecified bind(Fn, Types...);
     16 // template<Returnable R, CopyConstructible Fn, CopyConstructible... Types>
     17 //   unspecified bind(Fn, Types...);
     18 
     19 // https://bugs.llvm.org/show_bug.cgi?id=16385
     20 
     21 #include <functional>
     22 #include <cmath>
     23 #include <cassert>
     24 
     25 float _pow(float a, float b)
     26 {
     27     return std::pow(a, b);
     28 }
     29 
     30 int main()
     31 {
     32     std::function<float(float, float)> fnc = _pow;
     33     auto task = std::bind(fnc, 2.f, 4.f);
     34     auto task2(task);
     35     assert(task() == 16);
     36     assert(task2() == 16);
     37 }
     38