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From: "daniel.kruegler at googlemail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/53788] C++11 decltype sfinae static member function check (4.7.1)
Date: Wed, 27 Jun 2012 22:30:00 -0000
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D53788

Daniel Kr=C3=BCgler <daniel.kruegler at googlemail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |daniel.kruegler at
                   |                            |googlemail dot com

--- Comment #1 from Daniel Kr=C3=BCgler <daniel.kruegler at googlemail dot =
com> 2012-06-27 22:30:33 UTC ---
The problem also persists in gcc 4.8.0 20120624 (experimental).

Simplified example free from library dependencies:

struct t { static const bool value =3D true; };
struct f { static const bool value =3D false; };

template<typename T>
struct has_static {
  template<typename X>
  static t check(X*, decltype(T::fun())* =3D 0);
  static f check(...);

  typedef decltype(check((T*)(0))) ret;
  static const bool value =3D ret::value;
};

struct test { int fun() { return 0; } };

bool b =3D has_static<test>::value;