libcxx

libcxx mirror with random patches
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ptr_fun1.pass.cpp (717B)

      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 // REQUIRES: c++98 || c++03 || c++11 || c++14
     12 
     13 // template <CopyConstructible Arg, Returnable Result>
     14 // pointer_to_unary_function<Arg, Result>
     15 // ptr_fun(Result (*f)(Arg));
     16 
     17 #include <functional>
     18 #include <type_traits>
     19 #include <cassert>
     20 
     21 double unary_f(int i) {return 0.5 - i;}
     22 
     23 int main()
     24 {
     25     assert(std::ptr_fun(unary_f)(36) == -35.5);
     26 }