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 // template<Returnable R, class T, CopyConstructible... Args> 13 // unspecified mem_fn(R (T::* pm)(Args...)); 14 15 #include <functional> 16 #include <cassert> 17 18 struct A 19 { 20 char test0() {return 'a';} 21 char test1(int) {return 'b';} 22 char test2(int, double) {return 'c';} 23 }; 24 25 template <class F> 26 void 27 test0(F f) 28 { 29 { 30 A a; 31 assert(f(a) == 'a'); 32 A* ap = &a; 33 assert(f(ap) == 'a'); 34 const F& cf = f; 35 assert(cf(ap) == 'a'); 36 } 37 } 38 39 template <class F> 40 void 41 test1(F f) 42 { 43 { 44 A a; 45 assert(f(a, 1) == 'b'); 46 A* ap = &a; 47 assert(f(ap, 2) == 'b'); 48 const F& cf = f; 49 assert(cf(ap, 2) == 'b'); 50 } 51 } 52 53 template <class F> 54 void 55 test2(F f) 56 { 57 { 58 A a; 59 assert(f(a, 1, 2) == 'c'); 60 A* ap = &a; 61 assert(f(ap, 2, 3.5) == 'c'); 62 const F& cf = f; 63 assert(cf(ap, 2, 3.5) == 'c'); 64 } 65 } 66 67 int main() 68 { 69 test0(std::mem_fn(&A::test0)); 70 test1(std::mem_fn(&A::test1)); 71 test2(std::mem_fn(&A::test2)); 72 } 73
