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Example in [class.protected] needs to be updated #527

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timsong-cpp opened this issue Jul 21, 2015 · 1 comment
Closed

Example in [class.protected] needs to be updated #527

timsong-cpp opened this issue Jul 21, 2015 · 1 comment

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@timsong-cpp
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After CWG 1873, derived class friends have no access to base class protected members. The example in [class.protected], however, still labels such accesses as OK:

class B {
protected:
  int i;
  static int j;
};
class D1 : public B {
};
class D2 : public B {
  friend void fr(B*,D1*,D2*);
  void mem(B*,D1*);
};
void fr(B* pb, D1* p1, D2* p2) {
  // snip
  B::j = 5; // OK (because refers to static member) 
  D2::j = 6; // OK (because refers to static member)
}

The line B::j = 5; should be marked ill-formed instead.
@hubert-reinterpretcast
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It seems

p2->B::i = 4;

is suspect too.

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@hubert-reinterpretcast @timsong-cpp