BSD-3-Clause licensed by Harendra Kumar
Maintained by [email protected]
This version can be pinned in stack with:unicode-transforms-0.2.1@sha256:cb00598fd02544ca8016d26c111081c01dce523c41c5db0ae764beffb4ddf887,5636

Module documentation for 0.2.1

Unicode Transforms

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Fast Unicode 8.0 normalization in Haskell (NFC, NFKC, NFD, NFKD).

What is normalization?

Unicode characters with adornments (e.g. Á) can be represented in two different forms, as a single composed character (U+00C1 = Á) or as multiple decomposed characters (U+0041(A) U+0301( ́ ) = Á). They are differently encoded byte sequences but for humans they have exactly the same visual appearance.

A regular byte comparison may tell that two strings are different even though they might be equivalent. We need to convert both the strings in a normalized form using the Unicode Character Database before we can compare them for equivalence. For example:

>> import Data.Text.Normalize
>> normalize NFC "\193" == normalize NFC "\65\769"
True

Contributing

Please use https://github.com/harendra-kumar/unicode-transforms to raise issues, or send pull requests.

Changes

0.2.1

  • Improve speed and resource hog during compilation

0.2.0

  • Support Unicode version 8.0
  • Switch to pure Haskell implementation

0.1.0.1

  • Initial release based on utf8proc C implementation