haskell An efficient packed, immutable Unicode text type (both strict and lazy), with a powerful loop fusion optimization framework. The 'Text' type represents Unicode character strings, in a time and space-efficient manner. This package provides text processing capabilities that are optimized for performance critical use, both in terms of large data quantities and high speed. The 'Text' type provides character-encoding, type-safe case conversion via whole-string case conversion functions. It also provides a range of functions for converting 'Text' values to and from 'ByteStrings', using several standard encodings. Efficient locale-sensitive support for text IO is also supported. These modules are intended to be imported qualified, to avoid name clashes with Prelude functions, e.g. > import qualified Data.Text as T To use an extended and very rich family of functions for working with Unicode text (including normalization, regular expressions, non-standard encodings, text breaking, and locales), see the @text-icu@ package: <http://hackage.haskell.org/package/text-icu> operate in developer mode bos/text