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: 2009-07-29 11:25:19

> -----Original Message-----
> From: boost-users-bounces_at_[hidden] [mailto:boost-users-
> bounces_at_[hidden]] On Behalf Of Mathias Gaunard
> Sent: 29 July 2009 15:48
> To: boost-users_at_[hidden]
> Subject: Re: [Boost-users] detect if a type has a size_t member
> 
> Hicham Mouline wrote:
> 
> > Nevertheless, I still couldn't figure out how to detect the static const
> > size_t member.
> >
> > Which version to use?
> 
> No version allows this at the moment.
> You may, however, try to simply duplicate HAS_STATIC_MEMBER (or whatever
> it's called), change &X::Name to X::Name, and Type* to Type.

Thanks very much,
It worked for me on vs2005 and g++4.3.3
http://codepad.org/wsNi21Pr

at least for the cases I wanted, that is

struct S1 {
   static const size_t maxsize= 5;
};

struct S5 {
};

Nevertheless, it failed to compile on g++4.3.3 for 
struct S2 {
   static size_t maxsize;
}; 

because of this error:
error: 'S2::maxsize' is not a valid template argument for type 'long
unsigned int' because it is a non-constant expression

but compiled on vs2005 and failed ( which I don't care about )

thanks again,