clang/test/Parser/cxx-class.cpp

   1 // RUN: %clang_cc1 -fsyntax-only -verify -pedantic -fcxx-exceptions %s
   2 // RUN: %clang_cc1 -fsyntax-only -verify -pedantic -fcxx-exceptions -std=c++98 %s
   3 // RUN: %clang_cc1 -fsyntax-only -verify -pedantic -fcxx-exceptions -std=c++11 %s
   4
   5 class C;
   6 class C {
   7 public:
   8 protected:
   9   typedef int A,B;
  10   static int sf(), u;
  11
  12   struct S {};
  13   enum {}; // expected-warning{{declaration does not declare anything}}
  14   int; // expected-warning {{declaration does not declare anything}}
  15   int : 1, : 2;
  16
  17 public:
  18   void m0() {}; // ok, one extra ';' is permitted
  19   void m1() {}
  20   ; // ok, one extra ';' is permitted
  21   void m() {
  22     int l = 2;
  23   };; // expected-warning{{extra ';' after member function definition}}
  24
  25   template<typename T> void mt(T) { }
  26   ;
  27   ; // expected-warning{{extra ';' inside a class}}
  28
  29   virtual int vf() const volatile = 0;
  30
  31   virtual int vf0() = 0l; // expected-error {{does not look like a pure-specifier}}
  32   virtual int vf1() = 1; // expected-error {{does not look like a pure-specifier}}
  33   virtual int vf2() = 00; // expected-error {{does not look like a pure-specifier}}
  34   virtual int vf3() = 0x0; // expected-error {{does not look like a pure-specifier}}
  35   virtual int vf4() = 0.0; // expected-error {{does not look like a pure-specifier}}
  36   virtual int vf5(){0}; // expected-error +{{}} expected-warning {{unused}}
  37   virtual int vf5a(){0;}; // function definition, expected-warning {{unused}}
  38   virtual int vf6()(0); // expected-error +{{}} expected-note +{{}}
  39   virtual int vf7() = { 0 }; // expected-error {{does not look like a pure-specifier}}
  40   virtual int PR45267() = \
  41                         0; // ok, despite escaped newline
  42
  43 private:
  44   int x,f(),y,g();
  45   inline int h();
  46   static const int sci = 10;
  47   mutable int mi;
  48 };
  49 void glo()
  50 {
  51   struct local {};
  52 }
  53
  54 // PR3177
  55 typedef union {
  56   __extension__ union {
  57     int a;
  58     float b;
  59   } y;
  60 } bug3177;
  61
  62 // check that we don't consume the token after the access specifier
  63 // when it's not a colon
  64 class D {
  65 public // expected-error{{expected ':'}}
  66   int i;
  67 };
  68
  69 // consume the token after the access specifier if it's a semicolon
  70 // that was meant to be a colon
  71 class E {
  72 public; // expected-error{{expected ':'}}
  73   int i;
  74 };
  75
  76 class F {
  77     int F1 { return 1; }
  78 #if __cplusplus <= 199711L
  79     // expected-error@-2 {{function definition does not declare parameters}}
  80 #else
  81     // expected-error@-4 {{expected expression}}
  82     // expected-error@-5 {{expected}}
  83     // expected-note@-6 {{to match this '{'}}
  84     // expected-error@-7 {{expected ';' after class}}
  85 #endif
  86
  87     void F2 {}
  88 #if __cplusplus <= 199711L
  89     // expected-error@-2 {{function definition does not declare parameters}}
  90 #else
  91     // expected-error@-4 {{variable has incomplete type 'void'}}
  92     // expected-error@-5 {{expected ';' after top level declarator}}
  93 #endif
  94
  95     typedef int F3() { return 0; } // expected-error{{function definition declared 'typedef'}}
  96     typedef void F4() {} // expected-error{{function definition declared 'typedef'}}
  97 };
  98 #if __cplusplus >= 201103L
  99 // expected-error@-2 {{extraneous closing brace}}
 100 #endif
 101
 102 namespace ctor_error {
 103   class Foo {};
 104   // By [class.qual]p2, this is a constructor declaration.
 105   Foo::Foo (F) = F(); // expected-error{{does not match any declaration in 'ctor_error::Foo'}}
 106
 107   class Ctor { // expected-note{{not complete until the closing '}'}}
 108     Ctor(f)(int); // ok
 109     Ctor(g(int)); // ok
 110     Ctor(x[5]); // expected-error{{incomplete type}}
 111
 112     Ctor(UnknownType *); // expected-error{{unknown type name 'UnknownType'}}
 113     void operator+(UnknownType*); // expected-error{{unknown type name 'UnknownType'}}
 114   };
 115
 116   Ctor::Ctor (x) = { 0 }; // \
 117     // expected-error{{qualified reference to 'Ctor' is a constructor name}}
 118
 119   Ctor::Ctor(UnknownType *) {} // \
 120     // expected-error{{unknown type name 'UnknownType'}}
 121   void Ctor::operator+(UnknownType*) {} // \
 122     // expected-error{{unknown type name 'UnknownType'}}
 123 }
 124
 125 namespace nns_decl {
 126   struct A {
 127     struct B;
 128   };
 129   namespace N {
 130     union C;
 131   }
 132   struct A::B; // expected-error {{forward declaration of struct cannot have a nested name specifier}}
 133   union N::C; // expected-error {{forward declaration of union cannot have a nested name specifier}}
 134 }
 135
 136 // PR13775: Don't assert here.
 137 namespace PR13775 {
 138   class bar
 139   {
 140    public:
 141     void foo ();
 142     void baz ();
 143   };
 144   void bar::foo ()
 145   {
 146     baz x(); // expected-error 3{{}}
 147   }
 148 }
 149
 150 class pr16989 {
 151   void tpl_mem(int *) {
 152     return;
 153     class C2 {
 154       void f();
 155     };
 156     void C2::f() {} // expected-error{{function definition is not allowed here}}
 157   };
 158 };
 159
 160 namespace CtorErrors {
 161   struct A {
 162     A(NonExistent); // expected-error {{unknown type name 'NonExistent'}}
 163   };
 164   struct B {
 165     B(NonExistent) : n(0) {} // expected-error {{unknown type name 'NonExistent'}}
 166     int n;
 167   };
 168   struct C {
 169     C(NonExistent) try {} catch (...) {} // expected-error {{unknown type name 'NonExistent'}}
 170   };
 171   struct D {
 172     D(NonExistent) {} // expected-error {{unknown type name 'NonExistent'}}
 173   };
 174 }
 175
 176 namespace DtorErrors {
 177   struct A { ~A(); int n; } a;
 178   ~A::A() { n = 0; } // expected-error {{'~' in destructor name should be after nested name specifier}} expected-note {{previous}}
 179   A::~A() {} // expected-error {{redefinition}}
 180
 181   struct B { ~B(); } *b;
 182   DtorErrors::~B::B() {} // expected-error {{'~' in destructor name should be after nested name specifier}}
 183
 184   void f() {
 185     a.~A::A(); // expected-error {{'~' in destructor name should be after nested name specifier}}
 186     b->~DtorErrors::~B::B(); // expected-error {{'~' in destructor name should be after nested name specifier}}
 187   }
 188
 189   struct C; // expected-note {{forward decl}}
 190   ~C::C() {} // expected-error {{incomplete}} expected-error {{'~' in destructor name should be after nested name specifier}}
 191
 192   struct D { struct X {}; ~D() throw(X); };
 193   ~D::D() throw(X) {} // expected-error {{'~' in destructor name should be after nested name specifier}}
 194
 195   ~Undeclared::Undeclared() {} // expected-error {{use of undeclared identifier 'Undeclared'}} expected-error {{'~' in destructor name should be after nested name specifier}}
 196   ~Undeclared:: {} // expected-error {{expected identifier}} expected-error {{'~' in destructor name should be after nested name specifier}}
 197
 198   struct S {
 199     // For another struct's destructor, emit the same diagnostic like for
 200     // A::~A() in addition to the "~ in the wrong place" one.
 201     ~A::A() {} // expected-error {{'~' in destructor name should be after nested name specifier}} expected-error {{non-friend class member '~A' cannot have a qualified name}}
 202     A::~A() {} // expected-error {{non-friend class member '~A' cannot have a qualified name}}
 203
 204     // An inline destructor with a redundant class name should also get the
 205     // same diagnostic as S::~S.
 206     ~S::S() {} // expected-error {{'~' in destructor name should be after nested name specifier}} expected-error {{extra qualification on member '~S'}}
 207
 208     // This just shouldn't crash.
 209     int I; // expected-note {{declared here}}
 210     ~I::I() {} // expected-error {{'I' is not a class, namespace, or enumeration}} expected-error {{'~' in destructor name should be after nested name specifier}}
 211   };
 212
 213   struct T {};
 214   T t1 = t1.T::~T<int>; // expected-error {{destructor name 'T' does not refer to a template}}
 215   // Emit the same diagnostic as for the previous case, plus something about ~.
 216   T t2 = t2.~T::T<int>; // expected-error {{'~' in destructor name should be after nested name specifier}} expected-error {{destructor name 'T' does not refer to a template}}
 217 }
 218
 219 namespace BadFriend {
 220   struct A {
 221     friend int : 3; // expected-error {{friends can only be classes or functions}}
 222     friend void f() = 123; // expected-error {{illegal initializer}}
 223     friend virtual void f(); // expected-error {{'virtual' is invalid in friend declarations}}
 224     friend void f() final; // expected-error {{'final' is invalid in friend declarations}}
 225     friend void f() override; // expected-error {{'override' is invalid in friend declarations}}
 226   };
 227 }
 228
 229 class PR20760_a {
 230   int a = ); // expected-error {{expected expression}}
 231 #if __cplusplus <= 199711L
 232   // expected-warning@-2 {{default member initializer for non-static data member is a C++11 extension}}
 233 #endif
 234
 235   int b = }; // expected-error {{expected expression}}
 236 #if __cplusplus <= 199711L
 237   // expected-warning@-2 {{default member initializer for non-static data member is a C++11 extension}}
 238 #endif
 239
 240   int c = ]; // expected-error {{expected expression}}
 241 #if __cplusplus <= 199711L
 242   // expected-warning@-2 {{default member initializer for non-static data member is a C++11 extension}}
 243 #endif
 244
 245 };
 246 class PR20760_b {
 247   int d = d); // expected-error {{expected ';'}}
 248 #if __cplusplus <= 199711L
 249   // expected-warning@-2 {{default member initializer for non-static data member is a C++11 extension}}
 250 #endif
 251
 252   int e = d]; // expected-error {{expected ';'}}
 253 #if __cplusplus <= 199711L
 254   // expected-warning@-2 {{default member initializer for non-static data member is a C++11 extension}}
 255 #endif
 256
 257   int f = d // expected-error {{expected ';'}}
 258 #if __cplusplus <= 199711L
 259   // expected-warning@-2 {{default member initializer for non-static data member is a C++11 extension}}
 260 #endif
 261
 262 };
 263
 264 namespace PR20887 {
 265 class X1 { a::operator=; }; // expected-error {{undeclared identifier 'a'}}
 266 class X2 { a::a; }; // expected-error {{undeclared identifier 'a'}}
 267 }
 268
 269 class BadExceptionSpec {
 270   void f() throw(int; // expected-error {{expected ')'}} expected-note {{to match}}
 271   void g() throw(
 272       int(
 273           ; // expected-error {{unexpected ';' before ')'}}
 274           ));
 275 };
 276
 277 namespace PR41192 {
 278 extern struct A a;
 279 struct A {} ::PR41192::a; // ok, no missing ';' here  expected-warning {{extra qualification}}
 280
 281 #if __cplusplus >= 201103L
 282 struct C;
 283 struct D { static C c; };
 284 struct C {} decltype(D())::c; // expected-error {{'decltype' cannot be used to name a declaration}}
 285 #endif
 286 }
 287
 288 namespace ArrayMemberAccess {
 289   struct A {
 290     int x;
 291     template<typename T> int f() const;
 292   };
 293   void f(const A (&a)[]) {
 294     // OK: not a template-id.
 295     bool cond = a->x < 10 && a->x > 0;
 296     // OK: a template-id.
 297     a->f<int>();
 298   }
 299 }
 300
 301 namespace UndeclaredBaseTemplate {
 302   template<class> struct imp;
 303   template<class T> struct is_member_function_pointer : undeclared<imp<T>::member> {}; // expected-error {{unknown template name 'undeclared'}}
 304 }
 305
 306 // PR11109 must appear at the end of the source file
 307 class pr11109r3 { // expected-note{{to match this '{'}}
 308   public // expected-error{{expected ':'}} expected-error{{expected '}'}} expected-error{{expected ';' after class}}