Réf. : [boost] Re: lexical cast

From: scleary_at_[hidden]
Date: 2000-11-21 13:42:09

> >What about 
> >call_traits<T>::param_type ?
> 
> Sounds like a good suggestion. Should this also be the case for
> numeric_cast? I suspect so.

No; call_traits can't be used that way :(

It messes up function template parameter deduction.  Given:
  template <class Target, class Source>
  Target some_cast(call_traits<Source>::param_type arg) { ... }

The compiler cannot determine the type of "Source", forcing the users to
provide *both* template arguments instead of just the first.  An
unacceptable tradeoff, IMO.

        -Steve