1 // RUN: %clang_cc1 -verify -std=c++11 %s 2 3 struct NonTrivDtor { 4 ~NonTrivDtor(); 5 }; 6 struct DeletedDtor { 7 ~DeletedDtor() = delete; // expected-note 5 {{deleted here}} 8 }; 9 class InaccessibleDtor { 10 ~InaccessibleDtor() = default; 11 }; 12 13 // A defaulted destructor for a class X is defined as deleted if: 14 15 // -- X is a union-like class that has a variant member with a non-trivial 16 // destructor. 17 union A1 { 18 A1(); 19 NonTrivDtor n; // expected-note {{destructor of 'A1' is implicitly deleted because variant field 'n' has a non-trivial destructor}} 20 }; 21 A1 a1; // expected-error {{deleted function}} 22 struct A2 { 23 A2(); 24 union { 25 NonTrivDtor n; // expected-note {{because variant field 'n' has a non-trivial destructor}} 26 }; 27 }; 28 A2 a2; // expected-error {{deleted function}} 29 union A3 { 30 A3(); 31 NonTrivDtor n[3]; // expected-note {{because variant field 'n' has a non-trivial destructor}} 32 }; 33 A3 a3; // expected-error {{deleted function}} 34 struct A4 { 35 A4(); 36 union { 37 NonTrivDtor n[3]; // expected-note {{because variant field 'n' has a non-trivial destructor}} 38 }; 39 }; 40 A4 a4; // expected-error {{deleted function}} 41 42 // -- any of the non-static data members has class type M (or array thereof) and 43 // M has a deleted or inaccessible destructor. 44 struct B1 { 45 B1(); 46 DeletedDtor a; // expected-note {{because field 'a' has a deleted destructor}} 47 }; 48 B1 b1; // expected-error {{deleted function}} 49 struct B2 { 50 B2(); 51 InaccessibleDtor a; // expected-note {{because field 'a' has an inaccessible destructor}} 52 }; 53 B2 b2; // expected-error {{deleted function}} 54 struct B3 { 55 B3(); 56 DeletedDtor a[4]; // expected-note {{because field 'a' has a deleted destructor}} 57 }; 58 B3 b3; // expected-error {{deleted function}} 59 struct B4 { 60 B4(); 61 InaccessibleDtor a[4]; // expected-note {{because field 'a' has an inaccessible destructor}} 62 }; 63 B4 b4; // expected-error {{deleted function}} 64 union B5 { 65 B5(); 66 // FIXME: Describe the anonymous union member better than ''. 67 union { // expected-note {{because field '' has a deleted destructor}} 68 DeletedDtor a; // expected-note {{because field 'a' has a deleted destructor}} 69 }; 70 }; 71 B5 b5; // expected-error {{deleted function}} 72 union B6 { 73 B6(); 74 union { // expected-note {{because field '' has a deleted destructor}} 75 InaccessibleDtor a; // expected-note {{because field 'a' has an inaccessible destructor}} 76 }; 77 }; 78 B6 b6; // expected-error {{deleted function}} 79 80 // -- any direct or virtual base class has a deleted or inaccessible destructor. 81 struct C1 : DeletedDtor { C1(); } c1; // expected-error {{deleted function}} expected-note {{base class 'DeletedDtor' has a deleted destructor}} 82 struct C2 : InaccessibleDtor { C2(); } c2; // expected-error {{deleted function}} expected-note {{base class 'InaccessibleDtor' has an inaccessible destructor}} 83 struct C3 : virtual DeletedDtor { C3(); } c3; // expected-error {{deleted function}} expected-note {{base class 'DeletedDtor' has a deleted destructor}} 84 struct C4 : virtual InaccessibleDtor { C4(); } c4; // expected-error {{deleted function}} expected-note {{base class 'InaccessibleDtor' has an inaccessible destructor}} 85 86 // -- for a virtual destructor, lookup of the non-array deallocation function 87 // results in an ambiguity or a function that is deleted or inaccessible. 88 class D1 { 89 void operator delete(void*); 90 public: 91 virtual ~D1() = default; // expected-note {{here}} 92 } d1; // ok 93 struct D2 : D1 { // expected-note {{virtual destructor requires an unambiguous, accessible 'operator delete'}} \ 94 // expected-error {{deleted function '~D2' cannot override a non-deleted}} 95 // implicitly-virtual destructor 96 } d2; // expected-error {{deleted function}} 97 struct D3 { // expected-note {{virtual destructor requires an unambiguous, accessible 'operator delete'}} 98 virtual ~D3() = default; // expected-note {{explicitly defaulted function was implicitly deleted here}} 99 void operator delete(void*, double = 0.0); 100 void operator delete(void*, char = 0); 101 } d3; // expected-error {{deleted function}} 102 struct D4 { // expected-note {{virtual destructor requires an unambiguous, accessible 'operator delete'}} 103 virtual ~D4() = default; // expected-note {{implicitly deleted here}} 104 void operator delete(void*) = delete; 105 } d4; // expected-error {{deleted function}} 106
