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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 // <functional>
     11 
     12 // class function<R(ArgTypes...)>
     13 
     14 // R operator()(ArgTypes... args) const
     15 
     16 #include <functional>
     17 #include <cassert>
     18 
     19 // member data pointer:  cv qualifiers should transfer from argument to return type
     20 
     21 struct A_int_1
     22 {
     23     A_int_1() : data_(5) {}
     24 
     25     int data_;
     26 };
     27 
     28 void
     29 test_int_1()
     30 {
     31     // member data pointer
     32     {
     33         int A_int_1::*fp = &A_int_1::data_;
     34         A_int_1 a;
     35         std::function<int& (const A_int_1*)> r2(fp);
     36         const A_int_1* ap = &a;
     37         assert(r2(ap) == 6);
     38         r2(ap) = 7;
     39         assert(r2(ap) == 7);
     40     }
     41 }
     42 
     43 int main()
     44 {
     45     test_int_1();
     46 }
     47