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

3 Jul 2009

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-----Original Message-----
From: boost-users-bounces@lists.boost.org [mailto:boost-users-
bounces@lists.boost.org] On Behalf Of joel
Sent: 03 July 2009 17:03
To: boost-users@lists.boost.org
Subject: Re: [Boost-users] detect if a type has a size_t member
Hicham Mouline wrote:
...
Hello
template <typename T>
struct S {
   // how to detect T has a member static const size_t value ?
   // if T has value, define member of S,  m1 of type T1, otherwise
m2 of
type T2
};
Regards,
Check the Boost.Vault for th eintrospection library. It has a
HAS_STATIC_MEMBER_NAMED meta-function builder
Can I put the macro inside the struct S ?  I guess not. I'd write:

HAS_STATIC_MEMBER_NAMED(T, value)

which would return a integral bool or a bool type?