cpphs

A liberalised re-implementation of cpp, the C pre-processor.

http://projects.haskell.org/cpphs/

Version on this page:	1.20.9.1
LTS Haskell 24.17:	1.20.10
Stackage Nightly 2025-10-26:	1.20.10
Latest on Hackage:	1.20.10

See all snapshots cpphs appears in

LicenseRef-LGPL licensed and maintained by Malcolm Wallace

This version can be pinned in stack with:cpphs-1.20.9.1@sha256:a02113e8dc76a21e99592b46bf17fc89f237e4f6dc58b641172294985d3c4f29,3183

Module documentation for 1.20.9.1

Language
- Language.Preprocessor
  - Language.Preprocessor.Cpphs
  - Language.Preprocessor.Unlit

Depends on 4 packages(full list with versions):

base, directory, polyparse, time

Used by 2 packages in lts-18.8(full list with versions):

hlint, HTF

Cpphs is a re-implementation of the C pre-processor that is both more compatible with Haskell, and itself written in Haskell so that it can be distributed with compilers.

This version of the C pre-processor is pretty-much feature-complete and compatible with traditional (K&R) pre-processors. Additional features include: a plain-text mode; an option to unlit literate code files; and an option to turn off macro-expansion.