[Bug c++/41703] Problems with SFINAE. Source works at gcc 3.4.6 but fails at 4.2.1 and 4.5.0.20091008

["redi at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>]

------- Comment #1 from redi at gcc dot gnu dot org  2009-10-14 09:10 -------
Slightly reduced:

template <typename T, int (T::*)() const>
struct TSizeEnabler
{
    typedef T TClass;
};

template <typename X>
int
GetAllSize(const X &Var)
{ return sizeof(Var); }

template <typename X>
int
GetAllSize(const typename TSizeEnabler<X, &X::func>::TClass &Var)
{ return Var.func(); }

struct H
{
    int func() const;
};

int main()
{
    H b;
    return GetAllSize< H >(b);
}

I think you're right that this is a bug.  As a workaround you might be able to
remove GetAllSize(const X &Var) from the overload set for the case when
X::CalcMySize exists.


-- 

redi at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |jwakely dot gcc at gmail dot
                   |                            |com
      Known to fail|                            |4.1.2 4.4.1


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41703