Considering the scope of these two libraries, I still wonder which one to
use in some cases. For example, let's say I have a set of functions that
can only take integers as parameters, what's the correct practice : use
enable_if to have SFINAE makes the compiler outputs something like
"no such fonction" or have a concept check for Integer and have
a concept related error indicating people what happens.<br /><br />Is
there any policies or is this a matter of tastes ?