cpphs

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

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

Version on this page:	1.20.5
LTS Haskell 24.18:	1.20.10
Stackage Nightly 2025-11-03:	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-1.20.5@sha256:11aa50ae45120aceb660b8f21d915038cb0c99205dfaf73880af61c950e161e5,2336

Module documentation for 1.20.5

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

Depends on 5 packages(full list with versions):

base, directory, old-locale, old-time, polyparse

Used by 6 packages in lts-7.24(full list with versions):

haskell-src-exts, hlint, homplexity, hse-cpp, HTF, language-java

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.