From: Cédric Venet (cedric.venet_at_[hidden])
Date: 2007-07-10 10:06:19
Quoting Andrew Sutton <asutton_at_[hidden]>:
>> I'm not clear what your "truly optional" parameters are actually
>> for, but if (for example) they supply a functor could the default
>> value be some sort of identity functor?
> I guess it might be worthwhile to distinguish formally between
> optional parameters and those with default values. A parameter with
> default values is still a required input to a function even if the
> user doesn't explicitly pass a corresponding value. It's value is
> supplied by the specification. An optional parameter is one affects
> the function's behavior by its absence or presence in the argument list.
did you read:
it does what I was trying to explain in my previous mail automaticaly
and should correspond to your need (optionnal parameter and compile
time function dispatching).
Boost list run by bdawes at acm.org, gregod at cs.rpi.edu, cpdaniel at pacbell.net, john at johnmaddock.co.uk