The section on reserved names in GCC documentation gives several recommendations that probably the vast majority of C programs in the world do not follow.

Nevertheless, these are all good practices, and an interesting exercice was to check how the latest stable perl source code behaves v.s. these recommendations. As of the day writing this blog entry, this is perl-5.18.1.

The analysis has been done using c2ast.pl tool, from /users/jean-damien_durand/2013/12/index.html

The Perl 6 Advent Calendar, Day 18, in addition to show perl6's builtin grammar facility, was adressing a fundamental aspect of text processing, i.e. native unicode support in a grammar.

Indeed, if we say text processing, we say also characters-oriented framework. The perl6 example was the occasion to test Marpa::R2, and produce a tiny tutorial with it.

A card is a face followed immediately by a suit.