1 //===----------------------------------------------------------------------===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 // <functional> 10 11 // class function<R(ArgTypes...)> 12 13 // const std::type_info& target_type() const; 14 15 #include <functional> 16 #include <typeinfo> 17 #include <cassert> 18 19 #include "test_macros.h" 20 21 class A 22 { 23 int data_[10]; 24 public: 25 static int count; 26 A()27 A() 28 { 29 ++count; 30 for (int i = 0; i < 10; ++i) 31 data_[i] = i; 32 } 33 A(const A &)34 A(const A&) {++count;} 35 ~A()36 ~A() {--count;} 37 operator ()(int i) const38 int operator()(int i) const 39 { 40 for (int j = 0; j < 10; ++j) 41 i += data_[j]; 42 return i; 43 } 44 foo(int) const45 int foo(int) const {return 1;} 46 }; 47 48 int A::count = 0; 49 g(int)50int g(int) {return 0;} 51 main(int,char **)52int main(int, char**) 53 { 54 { 55 std::function<int(int)> f = A(); 56 assert(f.target_type() == typeid(A)); 57 } 58 { 59 std::function<int(int)> f; 60 assert(f.target_type() == typeid(void)); 61 } 62 63 return 0; 64 } 65