-----Original Message----- From: boost-users-bounces@lists.boost.org [mailto:boost-users- bounces@lists.boost.org] On Behalf Of Mathias Gaunard Sent: 29 July 2009 13:12 To: boost-users@lists.boost.org Subject: Re: [Boost-users] detect if a type has a size_t member
Hicham Mouline wrote:
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,
1) struct S { static const size_t maxsize =5; };
2) struct S { static size_t maxsize; };
3) struct S { size_t maxsize; };
Applied to S, the code doesn't compile in 1 and returns false in 2.
Is there a fix that can make it work for 1, 2 and 3 ?
No. Static members and non-static ones are very different things, and each requires usage of a different macro. BOOST_HAS_STATIC_MEMBER_DATA and BOOST_HAS_MEMBER_DATA.
I can't find BOOST_HAS_STATIC_MEMBER_DATA in introspection in the sandbox. Were you referring to some header files elsewhere? Joel, re compiler, I am using vs2005. The case I really need is 1... so I need to detect the compile-time static constant, and not a variable member... so is there a way to do it? Rds,