text-icu: Bindings to the ICU library

[ bsd3, data, library, text ] [ Propose Tags ]

Haskell bindings to the International Components for Unicode (ICU) libraries. These libraries provide robust and full-featured Unicode services on a wide variety of platforms.

Features include:

  • Both pure and impure bindings, to allow for fine control over efficiency and ease of use.

  • Breaking of strings on character, word, sentence, and line boundaries.

  • Access to the Unicode Character Database (UCD) of character metadata.

  • String collation functions, for locales where the conventions for lexicographic ordering differ from the simple numeric ordering of character codes.

  • Character set conversion functions, allowing conversion between Unicode and over 220 character encodings.

  • Unicode normalization. (When implementations keep strings in a normalized form, they can be assured that equivalent strings have a unique binary representation.)

  • Regular expression search and replace.

  • Security checks for visually confusable (spoofable) strings.

  • Bidirectional Unicode algorithm

  • Calendar objects holding dates and times.

  • Number and calendar formatting.

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Versions [RSS] 0.1,,,,,,,,,,,,,,,,,,,,, 0.8.0,,,,, (info)
Change log changelog.md
Dependencies base (>=4.8 && <5), bytestring, deepseq (>=, text (>= && <1.3 || >=2.0 && <2.1), time (>=1.5 && <1.13) [details]
License BSD-3-Clause
Copyright 2009-2015 Bryan O'Sullivan
Maintainer Vladimir Shabanov <dev@vshabanov.com>
Category Data, Text
Home page https://github.com/haskell/text-icu
Bug tracker https://github.com/haskell/text-icu/issues
Source repo head: git clone https://github.com/haskell/text-icu
Uploaded by VladimirShabanov at 2022-07-24T20:44:50Z
Distributions Arch:, Debian:, Fedora:, FreeBSD:, LTSHaskell:, NixOS:, Stackage:
Reverse Dependencies 41 direct, 2133 indirect [details]
Downloads 45817 total (216 in the last 30 days)
Rating 2.0 (votes: 1) [estimated by Bayesian average]
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Status Docs uploaded by user
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Readme for text-icu-

[back to package description]

Text-ICU: Comprehensive support for string manipulation

This package provides the Data.Text.ICU library, for performing complex manipulation of Unicode text. It provides features such as the following:

  • Unicode normalization

  • Conversion to and from many common and obscure encodings

  • Date and number formatting

  • Comparison and collation


This library is implemented as bindings to the well-respected ICU library (which is not bundled, and must be installed separately).


brew install icu4c
brew link icu4c --force

You might need:

export PKG_CONFIG_PATH="/usr/local/opt/icu4c/lib/pkgconfig"


sudo apt-get update
sudo apt-get install libicu-dev


sudo dnf install unzip libicu-devel


nix-shell --packages icu


Under MSYS2, ICU can be installed via pacman.

pacman --noconfirm -S mingw-w64-x86_64-icu

Depending on the age of the MSYS2 installation, the keyring might need to be updated to avoid certification issues, and pkg-config might need to be added. In this case, do this first:

pacman --noconfirm -Sy msys2-keyring
pacman --noconfirm -S mingw-w64-x86_64-pkg-config


With stack on Windows, which comes with its own bundled MSYS2, the following commands give up-to-date system dependencies for text-icu-0.8.0 (tested 2022-02-07):

stack exec -- pacman --noconfirm -Sy msys2-keyring
stack exec -- pacman --noconfirm -S mingw-w64-x86_64-icu
stack exec -- pacman --noconfirm -S mingw-w64-x86_64-pkg-config


Upstream ICU occasionally introduces backwards-incompatible API breaks. This package tries to stay up to date with upstream, and is currently more or less in sync with ICU 70.

Minimum required version is ICU 62.

Get involved!

Please report bugs via the github issue tracker.


This library was written by Bryan O'Sullivan.