- mlc/elt.hh: Fix bug.
- mlc/pair.hh: Add explicit error messages.
- mlc/valist.hh: Likewise.
- mlc/bool.hh (ASSERTION_FAILED_, AN_ASSERTION_FAILED_): Remove
so that error messages are more concise.
(iff_, mlc_iff): Rename as...
(type_iff_, mlc_type_iff): ...these.
(assert_): Update.
- mlc/switch.hh: New.
- mlc/is_a.hh (internal::is_a): Move and rename as...
(is_a_): ...this so error messages are shortern.
- mlc/cmp.hh: Pretty print.


git-svn-id: https://svn.lrde.epita.fr/svn/oln/trunk@412 4aad255d-cdde-0310-9447-f3009e2ae8c0