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This package includes backported versions of types that were added to transformers in transformers 0.3 an 0.4 for users who need strict transformers 0.2 or 0.3 compatibility to run on old versions of the platform, but also need those types.

unamb contains the "unambiguous choice" operator "unamb", which wraps thread racing up in a purely functional, semantically simple wrapper. Originally a part of Reactive, the author moved unamb to its own Haskell package in order to encourage experimentation.

R Unit test framework R functions implementing a standard Unit Testing framework, with additional code inspection and report generation tools

Fast parser/formatter/utilities for Unix time.

Efficient hashing-based container types. The containers have been optimized for performance critical use, both in terms of large data quantities and high speed. The declared cost of each operation is either worst-case or amortized, but remains valid even if structures are shared.

Lightweight UTF8 handling.

A UTF8 layer for IO and Strings. The utf8-string package provides operations for encoding UTF8 strings to Word8 lists and back, and for reading and writing UTF8 without truncation.

Various small Haskell helper functions for Lists, Maybes, Tuples, Functions. Some of these functions are improved implementations of standard functions. They have the same name as their standard counterparts.

UUAG is the Utrecht University Attribute Grammar system. It generates Haskell files from an attribute grammar specification. It is a preprocessor for Haskell which makes it easy to write catamorphisms (that is, functions that do to any datatype what foldr does to lists). You can define tree walks using the intuitive concepts of inherited and synthesized attributes, while keeping the full expressive power of Haskell.

Cabal plugin for UUAGC.