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What is LPeg? LPeg is a new (well, not that new now) pattern-matching
library for Lua, based on Parsing Expression Grammars (PEGs).

What is new in version 0.12?
  + no "unsigned short" limit for pattern sizes
  + mathtime captures considered nullable  (*)
  + some bugs and compiler warnings fixed

Where to get it?

(*) Although this change can be considered logically a bug fix, it can
lead to some old patterns being refused with a "loop body may accept
empty string" error. It should be easy to fix these patterns.

-- Roberto