Implementing normal algorithms using predicate versions

[Paolo Carlini]

Gabriel Dos Reis wrote:

>In particular, I've been wondering for a long time whether we really
>really want the following (in 3.3.x) to be inline :-)
>  
>
:-)
Seriously, you are right. Only a few hours ago, I was thinking that before
the release of 4.0, we should really take care of those functions and other
similar problems (i.e., moving some definitions *.h -> *.tcc)

Paolo.