test/SemaCXX/destructor.cpp

   1 // RUN: %clang_cc1 -fsyntax-only -Wnon-virtual-dtor -verify %s
   2 class A {
   3 public:
   4   ~A();
   5 };
   6
   7 class B {
   8 public:
   9   ~B() { }
  10 };
  11
  12 class C {
  13 public:
  14   (~C)() { }
  15 };
  16
  17 struct D {
  18   static void ~D(int, ...) const { } //                          \
  19     // expected-error{{type qualifier is not allowed on this function}} \
  20     // expected-error{{destructor cannot be declared 'static'}}  \
  21     // expected-error{{destructor cannot have any parameters}}   \
  22     // expected-error{{destructor cannot be variadic}} \
  23     // expected-error{{destructor cannot have a return type}} \
  24     // expected-error{{'const' qualifier is not allowed on a destructor}}
  25 };
  26
  27 struct D2 {
  28   void ~D2() { } //                          \
  29   // expected-error{{destructor cannot have a return type}}
  30 };
  31
  32
  33 struct E;
  34
  35 typedef E E_typedef;
  36 struct E {
  37   ~E_typedef(); // expected-error{{destructor cannot be declared using a typedef 'E_typedef' (aka 'E') of the class name}}
  38 };
  39
  40 struct F {
  41   (~F)(); // expected-note {{previous declaration is here}}
  42   ~F(); // expected-error {{destructor cannot be redeclared}}
  43 };
  44
  45 ~; // expected-error {{expected a class name after '~' to name a destructor}}
  46 ~undef(); // expected-error {{expected the class name after '~' to name a destructor}}
  47 ~operator+(int, int);  // expected-error {{expected a class name after '~' to name a destructor}}
  48 ~F(){} // expected-error {{destructor must be a non-static member function}}
  49
  50 struct G {
  51   ~G();
  52 };
  53
  54 G::~G() { }
  55
  56 // <rdar://problem/6841210>
  57 struct H {
  58   ~H(void) { }
  59 };
  60
  61 struct X {};
  62
  63 struct Y {
  64   ~X(); // expected-error {{expected the class name after '~' to name the enclosing class}}
  65 };
  66
  67 namespace PR6421 {
  68   class T; // expected-note{{forward declaration}}
  69
  70   class QGenericArgument // expected-note{{declared here}}
  71   {
  72     template<typename U>
  73     void foo(T t) // expected-error{{variable has incomplete type}}
  74     { }
  75
  76     void disconnect()
  77     {
  78       T* t;
  79       bob<QGenericArgument>(t); // expected-error{{undeclared identifier 'bob'}} \
  80       // expected-error{{does not refer to a value}}
  81     }
  82   };
  83 }
  84
  85 namespace PR6709 {
  86   template<class T> class X { T v; ~X() { ++*v; } };
  87   void a(X<int> x) {}
  88 }
  89
  90 struct X0 { virtual ~X0() throw(); };
  91 struct X1 : public X0 { };
  92
  93 // Make sure we instantiate operator deletes when building a virtual
  94 // destructor.
  95 namespace test6 {
  96   template <class T> class A {
  97   public:
  98     void *operator new(__SIZE_TYPE__);
  99     void operator delete(void *p) {
 100       T::deleteIt(p); // expected-error {{type 'int' cannot be used prior to '::'}}
 101     }
 102
 103     virtual ~A() {}
 104   };
 105
 106   class B : A<int> { B(); }; // expected-note {{in instantiation of member function 'test6::A<int>::operator delete' requested here}}
 107   B::B() {}
 108 }
 109
 110 // Make sure classes are marked invalid when they have invalid
 111 // members.  This avoids a crash-on-invalid.
 112 namespace test7 {
 113   struct A {
 114     ~A() const; // expected-error {{'const' qualifier is not allowed on a destructor}}
 115   };
 116   struct B : A {};
 117
 118   void test() {
 119     B *b;
 120     b->~B();
 121   }
 122 }
 123
 124 namespace nonvirtualdtor {
 125 struct S1 { // expected-warning {{has virtual functions but non-virtual destructor}}
 126   virtual void m();
 127 };
 128
 129 struct S2 {
 130   ~S2(); // expected-warning {{has virtual functions but non-virtual destructor}}
 131   virtual void m();
 132 };
 133
 134 struct S3 : public S1 {  // expected-warning {{has virtual functions but non-virtual destructor}}
 135   virtual void m();
 136 };
 137
 138 struct S4 : public S2 {  // expected-warning {{has virtual functions but non-virtual destructor}}
 139   virtual void m();
 140 };
 141
 142 struct B {
 143   virtual ~B();
 144   virtual void m();
 145 };
 146
 147 struct S5 : public B {
 148   virtual void m();
 149 };
 150
 151 struct S6 {
 152   virtual void m();
 153 private:
 154   ~S6();
 155 };
 156
 157 struct S7 {
 158   virtual void m();
 159 protected:
 160   ~S7();
 161 };
 162 }