clang/test/SemaCXX/function-type-qual.cpp

   1 // RUN: %clang_cc1 -fsyntax-only -verify %s
   2
   3 void f() const; // expected-error {{non-member function cannot have 'const' qualifier}}
   4 void (*pf)() const; // expected-error {{pointer to function type cannot have 'const' qualifier}}
   5 extern void (&rf)() const; // expected-error {{reference to function type cannot have 'const' qualifier}}
   6
   7 typedef void cfn() const;
   8 cfn f2; // expected-error {{non-member function of type 'cfn' (aka 'void () const') cannot have 'const' qualifier}}
   9
  10 class C {
  11   void f() const;
  12   cfn f2;
  13   static void f3() const; // expected-error {{static member function cannot have 'const' qualifier}}
  14   static cfn f4; // expected-error {{static member function of type 'cfn' (aka 'void () const') cannot have 'const' qualifier}}
  15
  16   void m1() {
  17     x = 0;
  18   }
  19
  20   void m2() const { // expected-note {{member function 'C::m2' is declared const here}}
  21     x = 0; // expected-error {{cannot assign to non-static data member within const member function 'm2'}}
  22   }
  23
  24   int x;
  25 };
  26
  27 void (C::*mpf)() const;
  28 cfn C::*mpg;
  29
  30 // Don't crash!
  31 void (PR14171)() const; // expected-error {{non-member function cannot have 'const' qualifier}}
  32
  33 // Test template instantiation of decayed array types.  Not really related to
  34 // type quals.
  35 template <typename T> void arrayDecay(const T a[]) { }
  36 void instantiateArrayDecay() {
  37   int a[1];
  38   arrayDecay(a);
  39 }
  40
  41 namespace GH79748 {
  42 typedef decltype(sizeof(0)) size_t;
  43 struct A {
  44   void* operator new(size_t bytes) const; //expected-error {{static member function cannot have 'const' qualifier}}
  45   void* operator new[](size_t bytes) const; //expected-error {{static member function cannot have 'const' qualifier}}
  46
  47   void operator delete(void*) const; //expected-error {{static member function cannot have 'const' qualifier}}
  48   void operator delete[](void*) const; //expected-error {{static member function cannot have 'const' qualifier}}
  49 };
  50 struct B {
  51   void* operator new(size_t bytes) volatile; //expected-error {{static member function cannot have 'volatile' qualifier}}
  52   void* operator new[](size_t bytes) volatile; //expected-error {{static member function cannot have 'volatile' qualifier}}
  53
  54   void operator delete(void*) volatile; //expected-error {{static member function cannot have 'volatile' qualifier}}
  55   void operator delete[](void*) volatile; //expected-error {{static member function cannot have 'volatile' qualifier}}
  56 };
  57 }