clang/test/SemaCXX/class.cpp

   1 // RUN: %clang_cc1 -fsyntax-only -verify -Wc++11-compat %s
   2 // RUN: %clang_cc1 -fsyntax-only -verify -Wc++11-compat %s -std=c++98
   3 class C {
   4 public:
   5   auto int errx; // expected-error {{storage class specified for a member declaration}}
   6 #if __cplusplus <= 199711L
   7   // expected-warning@-2 {{'auto' storage class specifier is redundant}}
   8 #else
   9   // expected-warning@-4 {{'auto' storage class specifier is not permitted in C++11, and will not be supported in future releases}}
  10 #endif
  11   register int erry; // expected-error {{storage class specified for a member declaration}}
  12   extern int errz; // expected-error {{storage class specified for a member declaration}}
  13
  14   static void sm() {
  15     sx = 0;
  16     this->x = 0; // expected-error {{invalid use of 'this' outside of a non-static member function}}
  17     x = 0; // expected-error {{invalid use of member 'x' in static member function}}
  18   }
  19
  20   class NestedC {
  21   public:
  22     NestedC(int);
  23     void f() {
  24       sx = 0;
  25       x = 0; // expected-error {{use of non-static data member 'x' of 'C' from nested type 'NestedC'}}
  26       sm();
  27       m(); // expected-error {{call to non-static member function 'm' of 'C' from nested type 'NestedC'}}
  28     }
  29   };
  30
  31   int b : 1, w : 2;
  32   int : 1, : 2;
  33   typedef int E : 1; // expected-error {{typedef member 'E' cannot be a bit-field}}
  34   static int sb : 1; // expected-error {{static member 'sb' cannot be a bit-field}}
  35   static int vs;
  36
  37   typedef int func();
  38   func tm;
  39   func *ptm;
  40   func btm : 1; // expected-error {{bit-field 'btm' has non-integral type}}
  41   NestedC bc : 1; // expected-error {{bit-field 'bc' has non-integral type}}
  42
  43   enum E1 { en1, en2 };
  44
  45   int i = 0;
  46 #if __cplusplus <= 199711L
  47   // expected-warning@-2 {{default member initializer for non-static data member is a C++11 extension}}
  48 #endif
  49   static int si = 0; // expected-error {{non-const static data member must be initialized out of line}}
  50   static const NestedC ci = 0; // expected-error {{static data member of type 'const C::NestedC' must be initialized out of line}}
  51   static const int nci = vs; // expected-error {{in-class initializer for static data member is not a constant expression}}
  52   static const int vi = 0;
  53   static const volatile int cvi = 0; // ok, illegal in C++11
  54 #if __cplusplus >= 201103L
  55   // expected-error@-2 {{static const volatile data member must be initialized out of line}}
  56 #endif
  57   static const E evi = 0;
  58
  59   void m() {
  60     sx = 0;
  61     this->x = 0;
  62     y = 0;
  63     this = 0; // expected-error {{expression is not assignable}}
  64   }
  65
  66   int f1(int p) {
  67     A z = 6;
  68     return p + x + this->y + z;
  69   }
  70
  71   typedef int A;
  72
  73   virtual int viv; // expected-error {{'virtual' can only appear on non-static member functions}}
  74   virtual static int vsif(); // expected-error {{'virtual' can only appear on non-static member functions}}
  75   virtual int vif();
  76
  77 private:
  78   int x,y;
  79   static int sx;
  80
  81   mutable int mi;
  82   mutable int &mir; // expected-error {{'mutable' cannot be applied to references}}
  83   mutable void mfn(); // expected-error {{'mutable' cannot be applied to functions}}
  84   mutable const int mci; // expected-error {{'mutable' and 'const' cannot be mixed}}
  85
  86   static const int number = 50;
  87   static int arr[number];
  88 };
  89
  90 class C2 {
  91   void f() {
  92     static int lx;
  93     class LC1 {
  94       int m() { return lx; }
  95     };
  96     class LC2 {
  97       int m() { return lx; }
  98     };
  99   }
 100 };
 101
 102 struct C3 {
 103   int i;
 104   mutable int j;
 105 };
 106 void f()
 107 {
 108   const C3 c3 = { 1, 2 };
 109   (void)static_cast<int*>(&c3.i); // expected-error {{static_cast from 'const int *' to 'int *' is not allowed}}
 110   // but no error here
 111   (void)static_cast<int*>(&c3.j);
 112 }
 113
 114 // Play with mutable a bit more, to make sure it doesn't crash anything.
 115 mutable int gi; // expected-error {{'mutable' can only be applied to member variables}}
 116 mutable void gfn(); // expected-error {{illegal storage class on function}}
 117 void ogfn()
 118 {
 119   mutable int ml; // expected-error {{'mutable' can only be applied to member variables}}
 120
 121   // PR3020: This used to crash due to double ownership of C4.
 122   struct C4;
 123   C4; // expected-warning {{declaration does not declare anything}}
 124 }
 125
 126 struct C4 {
 127   void f(); // expected-note{{previous declaration is here}}
 128   int f; // expected-error{{duplicate member 'f'}}
 129 };
 130
 131 // PR5415 - don't hang!
 132 struct S
 133 {
 134   void f(); // expected-note 1 {{previous declaration}} expected-note {{previous declaration}}
 135   void S::f() {} // expected-error {{extra qualification on member}} expected-error {{class member cannot be redeclared}}
 136   void f() {} // expected-error {{class member cannot be redeclared}}
 137 };
 138
 139 // Don't crash on this bogus code.
 140 namespace pr6629 {
 141   template<class T1, class T2> struct foo :
 142     bogus<foo<T1,T2> > // expected-error {{no template named 'bogus'}}
 143   { };
 144
 145   template<> struct foo<unknown,unknown> { // expected-error {{undeclared identifier 'unknown'}}
 146     template <typename U1, typename U2> struct bar {
 147       typedef bar type;
 148       static const int value = 0;
 149     };
 150   };
 151 }
 152
 153 namespace PR7153 {
 154   class EnclosingClass {
 155   public:
 156     struct A { } mutable *member;
 157   };
 158
 159   void f(const EnclosingClass &ec) {
 160     ec.member = 0;
 161   }
 162 }
 163
 164 namespace PR7196 {
 165   struct A {
 166     int a;
 167
 168     void f() {
 169       char i[sizeof(a)];
 170       enum { x = sizeof(i) };
 171       enum { y = sizeof(a) };
 172     }
 173   };
 174 }
 175
 176 namespace rdar8066414 {
 177   class C {
 178     C() {}
 179   } // expected-error{{expected ';' after class}}
 180 }
 181
 182 namespace rdar8367341 {
 183   float foo();
 184 #if __cplusplus >= 201103L
 185   // expected-note@-2 {{declared here}}
 186 #endif
 187
 188   struct A {
 189 #if __cplusplus <= 199711L
 190     static const float x = 5.0f; // expected-warning {{in-class initializer for static data member of type 'const float' is a GNU extension}}
 191     static const float y = foo(); // expected-warning {{in-class initializer for static data member of type 'const float' is a GNU extension}} expected-error {{in-class initializer for static data member is not a constant expression}}
 192 #else
 193     static constexpr float x = 5.0f;
 194     static constexpr float y = foo(); // expected-error {{constexpr variable 'y' must be initialized by a constant expression}} expected-note {{non-constexpr function 'foo' cannot be used in a constant expression}}
 195 #endif
 196   };
 197 }
 198
 199 namespace with_anon {
 200 struct S {
 201   union {
 202     char c;
 203   };
 204 };
 205
 206 void f() {
 207     S::c; // expected-error {{invalid use of non-static data member}}
 208 }
 209 }
 210
 211 struct PR9989 {
 212   static int const PR9989_Member = sizeof PR9989_Member;
 213 };