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 // UNSUPPORTED: c++98, c++03 11 12 // <memory> 13 14 // unique_ptr 15 16 // Test unique_ptr converting move assignment 17 18 #include <memory> 19 #include <utility> 20 #include <cassert> 21 22 #include "unique_ptr_test_helper.h" 23 24 template <class APtr, class BPtr> 25 void testAssign(APtr& aptr, BPtr& bptr) { 26 A* p = bptr.get(); 27 assert(A::count == 2); 28 aptr = std::move(bptr); 29 assert(aptr.get() == p); 30 assert(bptr.get() == 0); 31 assert(A::count == 1); 32 assert(B::count == 1); 33 } 34 35 template <class LHS, class RHS> 36 void checkDeleter(LHS& lhs, RHS& rhs, int LHSState, int RHSState) { 37 assert(lhs.get_deleter().state() == LHSState); 38 assert(rhs.get_deleter().state() == RHSState); 39 } 40 41 template <class T> 42 struct NCConvertingDeleter { 43 NCConvertingDeleter() = default; 44 NCConvertingDeleter(NCConvertingDeleter const&) = delete; 45 NCConvertingDeleter(NCConvertingDeleter&&) = default; 46 47 template <class U> 48 NCConvertingDeleter(NCConvertingDeleter<U>&&) {} 49 50 void operator()(T*) const {} 51 }; 52 53 template <class T> 54 struct NCConvertingDeleter<T[]> { 55 NCConvertingDeleter() = default; 56 NCConvertingDeleter(NCConvertingDeleter const&) = delete; 57 NCConvertingDeleter(NCConvertingDeleter&&) = default; 58 59 template <class U> 60 NCConvertingDeleter(NCConvertingDeleter<U>&&) {} 61 62 void operator()(T*) const {} 63 }; 64 65 struct GenericDeleter { 66 void operator()(void*) const; 67 }; 68 69 struct NCGenericDeleter { 70 NCGenericDeleter() = default; 71 NCGenericDeleter(NCGenericDeleter const&) = delete; 72 NCGenericDeleter(NCGenericDeleter&&) = default; 73 74 void operator()(void*) const {} 75 }; 76 77 void test_sfinae() { 78 using DA = NCConvertingDeleter<A[]>; // non-copyable deleters 79 using DAC = NCConvertingDeleter<const A[]>; // non-copyable deleters 80 81 using UA = std::unique_ptr<A[]>; 82 using UAC = std::unique_ptr<const A[]>; 83 using UAD = std::unique_ptr<A[], DA>; 84 using UACD = std::unique_ptr<const A[], DAC>; 85 86 { // cannot move from an lvalue 87 static_assert(std::is_assignable<UAC, UA&&>::value, ""); 88 static_assert(!std::is_assignable<UAC, UA&>::value, ""); 89 static_assert(!std::is_assignable<UAC, const UA&>::value, ""); 90 } 91 { // cannot move if the deleter-types cannot convert 92 static_assert(std::is_assignable<UACD, UAD&&>::value, ""); 93 static_assert(!std::is_assignable<UACD, UAC&&>::value, ""); 94 static_assert(!std::is_assignable<UAC, UACD&&>::value, ""); 95 } 96 { // cannot move-convert with reference deleters of different types 97 using UA1 = std::unique_ptr<A[], DA&>; 98 using UA2 = std::unique_ptr<A[], DAC&>; 99 static_assert(!std::is_assignable<UA1, UA2&&>::value, ""); 100 } 101 { // cannot move-convert with reference deleters of different types 102 using UA1 = std::unique_ptr<A[], const DA&>; 103 using UA2 = std::unique_ptr<A[], const DAC&>; 104 static_assert(!std::is_assignable<UA1, UA2&&>::value, ""); 105 } 106 { // cannot move-convert from unique_ptr<Single> 107 using UA1 = std::unique_ptr<A[]>; 108 using UA2 = std::unique_ptr<A>; 109 static_assert(!std::is_assignable<UA1, UA2&&>::value, ""); 110 } 111 { // cannot move-convert from unique_ptr<Array[]> 112 using UA1 = std::unique_ptr<A[], NCGenericDeleter>; 113 using UA2 = std::unique_ptr<A, NCGenericDeleter>; 114 static_assert(!std::is_assignable<UA1, UA2&&>::value, ""); 115 } 116 } 117 118 int main() { 119 test_sfinae(); 120 // FIXME: add tests 121 } 122
