Si on savait depuis longtemps qui est pire que le C++,
on ne le savait pas formellement :
http://perlmonks.org/?node_id=663393
Perl Cannot Be Parsed: A Formal Proof
In the man page for PPI, Adam Kennedy conjectures that perl is
unparseable, and suggests how to prove it. Below I carry out a
rigorous version of the proof, which should put the matter beyond doubt.