Hi, I released unicode-transforms sometime back as bindings to a C library (utf8proc). Since then I have rewritten it completely in Haskell. Haskell data structures are automatically generated from unicode database, so it can be kept up-to-date with the standard unlike the C implementation which was stuck at unicode 5. The implementation comes with a test suite providing 100% code coverage.
After a number of algorithmic and implementation efficiency optimizations, I was able to get several times better decompose performance compared to the C implementation. I have not yet got a chance to fully optimize the compose operations but they are still as fast as utf8proc. I would like to thank Antonio Nikishaev for the unicode character database parsing code which I borrowed from the prose library. https://github.com/harendra-kumar/unicode-transforms https://hackage.haskell.org/package/unicode-transforms -harendra
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