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 // template<class F, class A> void assign(F&&, const A&); 14 // This call was removed post-C++14 15 16 // This test runs in C++03, but we have deprecated using std::function in C++03. 17 // ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_DISABLE_DEPRECATION_WARNINGS -D_LIBCPP_ENABLE_CXX03_FUNCTION 18 19 #include <functional> 20 #include <cassert> 21 22 #include "test_macros.h" 23 #include "test_allocator.h" 24 25 class A 26 { 27 int data_[10]; 28 public: 29 static int count; 30 A()31 A() 32 { 33 ++count; 34 for (int i = 0; i < 10; ++i) 35 data_[i] = i; 36 } 37 A(const A &)38 A(const A&) {++count;} 39 ~A()40 ~A() {--count;} 41 operator ()(int i) const42 int operator()(int i) const 43 { 44 for (int j = 0; j < 10; ++j) 45 i += data_[j]; 46 return i; 47 } 48 foo(int) const49 int foo(int) const {return 1;} 50 }; 51 52 int A::count = 0; 53 main(int,char **)54int main(int, char**) 55 { 56 #if TEST_STD_VER <= 14 57 { 58 std::function<int(int)> f; 59 f.assign(A(), test_allocator<A>()); 60 assert(A::count == 1); 61 assert(f.target<A>()); 62 assert(f.target<int(*)(int)>() == 0); 63 } 64 assert(A::count == 0); 65 #endif 66 67 return 0; 68 } 69