Idea for more delegations in <algorithm>

[Paolo Carlini]

Gabriel Dos Reis wrote:

>There is always a value passed to the function -- when none is
>lexically specified in the source code, the compiler uses the default
>value. 
>
>The situation is slightly different for empty classes: we and the
>compiler know that a value of that type is insignificant.  So, it
>could be safely not loaded into the argument list.
>
>For the enable-if stuff, only we (and not the compiler) know that the
>default is just a hackery artefact -- except when the function is of
>course inline and inlined.
>  
>
Thanks for the clarification. These considerations, however, make me think
that maybe we should *not* use __enable_if elsewhere, if ever possible... ;)

In implementing tr1/type_traits I avoided completely __enable_if, but 
only on
a stylistic base, so to speak, lucky guy... ;)

Paolo.