Re: [Boost-users] detect if a type has a size_t member

Subject: Re: [Boost-users] detect if a type has a size_t member
From: Hicham Mouline (hicham_at_[hidden])
Date: 2009-07-06 12:16:43

> -----Original Message-----
> From: boost-users-bounces_at_[hidden] [mailto:boost-users-
> bounces_at_[hidden]] On Behalf Of joel
> Sent: 06 July 2009 14:26
> To: boost-users_at_[hidden]
> Subject: Re: [Boost-users] detect if a type has a size_t member
> 
> Hicham Mouline wrote:
> > which doesn't build because
> >
> > error C2953: 'boost::introspection::has_member_data_maxsize' : class
> > template has already been defined
> >
> The macro build a template meta-function that you use on your type :
> 
> BOOST_HAS_MEMBER_DATA(size_t, maxsize);
> 
> 
> int main()
> {
>     if ( boost::introspection::has_member_data_maxsize<T>::value )
>     {
>         std::cout<<" T has max_size"<<std::endl;
>     }
>     return 0;
> }
> 
Thank you. May I suggest to replace "Type" in 

#define BOOST_HAS_MEMBER_DATA(Type,Name)  

in the header file by MemberType for e.g.

A naive user (myself) thought "Type" was his type, not the member data type.

Regards,