Re: [boost] [mpl] has_function

Subject: Re: [boost] [mpl] has_function
From: Ingo Loehken (Ingo.Loehken_at_[hidden])
Date: 2010-03-21 14:43:06

The only thing you can determine, is, if the type (class) of the last 
declaration is the
one you expected. That means if you know that the first declaration of 
your function
comes in from baseT, you can determine if a deriving class overwrites that 
decl,
and that is exactly what a deriving class needs to do to overload a 
virtual function.

I myself use this pattern to determine, if a type is an XPCOM Interface or 
not. Perhaps
you'd like to check for something similiar.

If interested in details, let me know.

Mathias Gaunard <mathias.gaunard_at_[hidden]> 
Sent by: boost-bounces_at_[hidden]
21.03.2010 19:31
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Subject
Re: [boost] [mpl] has_function

Lorenzo Caminiti wrote:

> Is there a way I can check if a class has a given member function
> using metaprogramming?

Yes.

> 
> What I need is to check at compile-time if a function is overriding a
> virtual function or not.

This is not the same, and there is no way to do that as far as I know.

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