Lpegj is a project mainly written in JAVA and LUA, it's free.
Port of LPEG 0.10.1 to Java, and bindings for LuaJ.
This is a straight port of the LPEG compiler and virtual machine
to Java. It also includes a binding to LuaJ, so Lua scripts running
under LuaJ can use it as if it were LPEG 0.10.1
(with require "lpegj.luaj.lpeg"), with the caveats below.
LuaJ does not have a 100% faithful implementation of arithmetic
metamethods, so things like 1 - p where p is a pattern do
not work; use lpeg.P(1) - p. Things like p + 1 work, though.
The file test.lua has been adjusted accordingly.
Almost no optimizations yet in the generated patterns, just the simplest identities
NO VERIFIER, so you may write patterns that hang and the compiler will not detect it
A lot of sanity checking that LPEG does to detect erroneous patterns and captures is missing
As a rule of thumb, if it works in LPEG it should work in LPEG/J, and if it does not work in LPEG it may give a spurious result in LPEG/J. Plans are to do the verifier first, then sanity checking, and the funky optimizations last.
The license is the same as Lua.