[cfe-users] problem with `candidate template ignored: invalid explicitly-specified argument'

[Richard Smith via cfe-users]

On Wed, 7 Nov 2018 at 11:44, Jan Korous <jkorous at apple.com> wrote:

>
> > On Nov 7, 2018, at 7:03 PM, Werner LEMBERG via cfe-users <
> cfe-users at lists.llvm.org> wrote:
> >
> >
> >> The rule for determining when a base class function declaration
> >> introduced by a using-declaration is hidden by a derived class
> >> function declaration does not take the template parameter list into
> >> account: http://eel.is/c++draft/namespace.udecl#15.sentence-1
> >
> > Our main lilypond developer disagrees.  He writes:
> >
> >  This link states:
> >
> >    When a using-declarator brings declarations from a base class into
> >    a derived class, member functions and member function templates in
> >    the derived class override and/or hide member functions and member
> >    function templates with the same name, parameter-type-list,
> >    cv-qualification, and ref-qualifier (if any) in a base class
> >    (rather than conflicting).
> >
> >  The parameter-type-list is a different one in this example since
> >  they contain a different member function pointer type.  Which is the
> >  reason we need the whole hooplahoop in the first place.
> >
>
> Isn’t it template-parameter-list that is different rather than
> parameter-type-list?
>
> http://eel.is/c++draft/dcl.fct#def:parameter-type-list
> http://eel.is/c++draft/temp#nt:template-parameter-list


Yes. The pieces are these:

template
  <typename T> // template-parameter-list
void f
  (int N) // parameter-type-list

Both base and derived function template have a parameter-type-list of (). :(

> For context, the whole lilypond thread starts at
> >
> >  https://lists.gnu.org/archive/html/lilypond-devel/2018-11/msg00019.html
> >
> >
> >    Werner
> > _______________________________________________
> > cfe-users mailing list
> > cfe-users at lists.llvm.org
> > http://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-users
>
>
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