Re: [boost] [lambda] extension question

From: Brock Peabody (brock.peabody_at_[hidden])
Date: 2005-07-19 08:06:39

On Behalf Of Jaakko Järvi:

>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.

That makes sense.  After looking around some more I found what seems to
be an easier way to do it using the action<> template that hides this
problem.

Thanks,
Brock