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=16343
20
21 #include <cmath>
22 #include <functional>
23 #include <cassert>
24
25 struct power
26 {
27 template <typename T>
28 T
operator ()power29 operator()(T a, T b)
30 {
31 return static_cast<T>(std::pow(a, b));
32 }
33 };
34
35 struct plus_one
36 {
37 template <typename T>
38 T
operator ()plus_one39 operator()(T a)
40 {
41 return a + 1;
42 }
43 };
44
main()45 int main()
46 {
47 using std::placeholders::_1;
48
49 auto g = std::bind(power(), 2, _1);
50 assert(g(5) == 32);
51 assert(std::bind(plus_one(), g)(5) == 33);
52 }
53