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 // function(nullptr_t); 15 16 #include <functional> 17 #include <new> 18 #include <cstdlib> 19 #include <cassert> 20 21 int new_called = 0; 22 23 void* operator new(std::size_t s) throw(std::bad_alloc) 24 { 25 ++new_called; 26 return std::malloc(s); 27 } 28 29 void operator delete(void* p) throw() 30 { 31 --new_called; 32 std::free(p); 33 } 34 35 class A 36 { 37 int data_[10]; 38 public: 39 static int count; 40 41 A() 42 { 43 ++count; 44 for (int i = 0; i < 10; ++i) 45 data_[i] = i; 46 } 47 48 A(const A&) {++count;} 49 50 ~A() {--count;} 51 52 int operator()(int i) const 53 { 54 for (int j = 0; j < 10; ++j) 55 i += data_[j]; 56 return i; 57 } 58 59 int foo(int) const {return 1;} 60 }; 61 62 int A::count = 0; 63 64 int g(int) {return 0;} 65 66 int main() 67 { 68 assert(new_called == 0); 69 { 70 std::function<int(int)> f = A(); 71 assert(A::count == 1); 72 assert(new_called == 1); 73 assert(f.target<A>()); 74 assert(f.target<int(*)(int)>() == 0); 75 } 76 assert(A::count == 0); 77 assert(new_called == 0); 78 { 79 std::function<int(int)> f = g; 80 assert(new_called == 0); 81 assert(f.target<int(*)(int)>()); 82 assert(f.target<A>() == 0); 83 } 84 assert(new_called == 0); 85 { 86 std::function<int(int)> f = (int (*)(int))0; 87 assert(!f); 88 assert(new_called == 0); 89 assert(f.target<int(*)(int)>() == 0); 90 assert(f.target<A>() == 0); 91 } 92 { 93 std::function<int(const A*, int)> f = &A::foo; 94 assert(f); 95 assert(new_called == 0); 96 assert(f.target<int (A::*)(int) const>() != 0); 97 } 98 } 99
