I presume introspection is more portable. I'm getting the error in forward1.hpp "cannot open include file: 'boost/introspection/detail/object_call_spec.hpp'". This file does not appear to be on the sandbox. On 9 March 2010 13:29, Igor R <boost.lists@gmail.com> wrote:

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Can I ask inside a template function if a member exists on a parameter of the function.

For example.

template <typename T> void func(T in) { exists(in, foo); }

Where the "exists" line would return true if "in" had a member "foo" otherwise false.

Note, however, that "introspection" libarary cannot detect an inherited member. If you use MSVC and don't need a portable code, you can use __if_exists statement: http://msdn.microsoft.com/en-us/library/x7wy9xh3(VS.80).aspx _______________________________________________ Boost-users mailing list Boost-users@lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users

Igor R wrote:

I use the version available here: http://www.boostpro.com/vault/ It compiles well. The sandbox introspection has nothign to do with my introspection in the vault, beware ;)

-- ___________________________________________ Joel Falcou - Assistant Professor PARALL Team - LRI - Universite Paris Sud XI Tel : (+33)1 69 15 66 35

Igor R wrote:

Which one is better Well this is a non question. Mine solve compile-time introspection, the other seems to be runtime oriented.

-- ___________________________________________ Joel Falcou - Assistant Professor PARALL Team - LRI - Universite Paris Sud XI Tel : (+33)1 69 15 66 35

Does your one do the same thing? On 10 March 2010 18:24, Igor R <boost.lists@gmail.com> wrote:

...

...

I use the version available here: http://www.boostpro.com/vault/ It compiles well.

The sandbox introspection has nothign to do with my introspection in the vault, beware ;)

Which one is better? _______________________________________________ Boost-users mailing list Boost-users@lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users