libghc-wl-pprint-extras-dev - 3.5.0.5-8+b1 main

This is an implementation of the pretty printing combinators described
by Philip Wadler (1997). In their bare essence, the combinators of
Wadler are not expressive enough to describe some commonly occurring
layouts. The PPrint library adds new primitives to describe these
layouts and works well in practice.
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The library is based on a single way to concatenate documents, which
is associative and has both a left and right unit. This simple design
leads to an efficient and short implementation. The simplicity is
reflected in the predictable behaviour of the combinators which make
them easy to use in practice.
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This package provides a library for the Haskell programming language.
See http://www.haskell.org/ for more information on Haskell.