> Note: There is a module which does this with optimization: Regexp::Trie. And there is a fancier Regexp::Assemble.

ReNote: Both modules are mostly obsolete since demerphq implemented trie optimization in Perl's regex engine (>=5.9.2)

see http://taint.org/2006/07/07/184022a.html for details

Cheers Rolf
(addicted to the Perl Programming Language and ☆☆☆☆ :)
Je suis Charlie!

In reply to Re^2: [RFC] Building Regex Alternations Dynamically by LanX
in thread Building Regex Alternations Dynamically by haukex

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