clang/test/CXX/expr/expr.post/expr.reinterpret.cast/p2.cpp

   1 // RUN: %clang_cc1 %s -verify
   2
   3 // The reinterpret_cast operator shall not cast away constness.
   4 struct X {};
   5 struct Y {};
   6 void f(const int * X::* Y::* *p) {
   7   // This applies for similar types...
   8   (void)reinterpret_cast<int * X::* Y::* *>(p); // expected-error {{casts away qualifiers}}
   9   // ... and for cases where the base type is different ...
  10   (void)reinterpret_cast<float * X::* Y::* *>(p); // expected-error {{casts away qualifiers}}
  11   // ... and for cases where pointers to members point to members of different classes ...
  12   (void)reinterpret_cast<int * Y::* X::* *>(p); // expected-error {{casts away qualifiers}}
  13   // ... and even for cases where the path is wholly different!
  14   // (Though we accept such cases as an extension.)
  15   (void)reinterpret_cast<double Y::* X::* * *>(p); // expected-warning {{casts away qualifiers}}
  16
  17   // If qualifiers are added, we need a 'const' at every level above.
  18   (void)reinterpret_cast<const volatile double Y::* X::* * *>(p); // expected-warning {{casts away qualifiers}}
  19   (void)reinterpret_cast<const volatile double Y::*const X::*const **>(p); // expected-warning {{casts away qualifiers}}
  20   (void)reinterpret_cast<const volatile double Y::*const X::**const *>(p); // expected-warning {{casts away qualifiers}}
  21   (void)reinterpret_cast<const volatile double Y::*X::*const *const *>(p); // expected-warning {{casts away qualifiers}}
  22   (void)reinterpret_cast<const volatile double Y::*const X::*const *const *>(p); // ok
  23
  24   (void)reinterpret_cast<const double Y::*volatile X::**const *>(p); // expected-warning {{casts away qualifiers}}
  25   (void)reinterpret_cast<const double Y::*volatile X::*const *const *>(p); // ok
  26 }