1 // 2005-01-26 Douglas Gregor <dgregor@cs.indiana.edu> 2 // 3 // Copyright (C) 2005-2018 Free Software Foundation, Inc. 4 // 5 // This file is part of the GNU ISO C++ Library. This library is free 6 // software; you can redistribute it and/or modify it under the 7 // terms of the GNU General Public License as published by the 8 // Free Software Foundation; either version 3, or (at your option) 9 // any later version. 10 // 11 // This library is distributed in the hope that it will be useful, 12 // but WITHOUT ANY WARRANTY; without even the implied warranty of 13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 // GNU General Public License for more details. 15 // 16 // You should have received a copy of the GNU General Public License along 17 // with this library; see the file COPYING3. If not see 18 // <http://www.gnu.org/licenses/>. 19 20 // 3.5 function template mem_fn 21 #include <tr1/functional> 22 #include <testsuite_hooks.h> 23 #include <testsuite_tr1.h> 24 25 struct X { int bar; }; 26 27 struct Y : X { }; 28 29 template<typename T> 30 struct dumb_ptr 31 { dumb_ptrdumb_ptr32 dumb_ptr(T* p) : p(p) {} 33 operator *dumb_ptr34 T& operator*() const { return *p; } 35 36 private: 37 T* p; 38 }; 39 40 // Test mem_fn with a data member test01(int r=0)41void test01(int r = 0) 42 { 43 using std::tr1::mem_fn; 44 45 X x; 46 Y y; 47 const X& xc = x; 48 const Y& yc = y; 49 X* xp = &x; 50 Y* yp =&y; 51 const X* xpc = xp; 52 const Y* ypc = yp; 53 dumb_ptr<X> xd(xp); 54 dumb_ptr<Y> yd(yp); 55 const dumb_ptr<X>& xdc = xd; 56 const dumb_ptr<Y>& ydc = yd; 57 58 int& bx = mem_fn(&X::bar)(x); 59 const int& bxc = mem_fn(&X::bar)(xc); 60 int& bxp = mem_fn(&X::bar)(xp); 61 const int& bxpc = mem_fn(&X::bar)(xpc); 62 const int& bxd = mem_fn(&X::bar)(xd); 63 const int& bxdc = mem_fn(&X::bar)(xdc); 64 65 int& by = mem_fn(&X::bar)(y); 66 const int& byc = mem_fn(&X::bar)(yc); 67 int& byp = mem_fn(&X::bar)(yp); 68 const int& bypc = mem_fn(&X::bar)(ypc); 69 const int& byd = mem_fn(&X::bar)(yd); 70 const int& bydc = mem_fn(&X::bar)(ydc); 71 72 // Avoid unused variable warnings. 73 r = bx + bxc + bxp + bxpc + bxd + bxdc + by + byc + byp + bypc + byd + bydc; 74 } 75 main()76int main() 77 { 78 test01(); 79 return 0; 80 } 81