From: Jaakko Järvi (jarvi_at_[hidden])
Date: 2005-07-19 02:35:21
On Jul 18, 2005, at 6:19 PM, Brock Peabody wrote:
>
> When I try to compile my example in VC 7.1 I get an error that seems to
> indicate that the type being passed to the sig template is
> boost::tuples::null_type. Everything works if I hardwire it like:
>
> template <class T> struct sig { typedef std::string type; };
>
Yes, a null_type is passed to sig. This is because the signature of the
zero argument
lambda function (in lambda_functor class) signature is instantiated
always, regardless
of whether it is called or not. And there the argument list is just
null_type.
Hence, the return type deduction is not allowed to cause a compilation
error in the
case where the argument tuple to sig is null_type.
Best, Jaakko
> Any ideas?
>
> Thanks,
> Brock
>
> _______________________________________________
> Unsubscribe & other changes:
> http://listarchives.boost.org/mailman/listinfo.cgi/boost
>
-- Jaakko Järvi, jarvi_at_[hidden]