Syntax highlighter for Haskell using the lexer of GHC
|Version on this page:||0.0.8.0|
|LTS Haskell 20.15:||0.0.8.0|
|Stackage Nightly 2023-03-20:||0.0.9.0@rev:1|
|Latest on Hackage:||0.0.9.0@rev:1|
Module documentation for 0.0.8.0
GHC syntax highligher
This is a syntax highlighter library for Haskell using the lexer of GHC.
Here is a blog post announcing the package, the readme is mostly derived from it:
Parsing Haskell is hard, because Haskell is a complex language with
countless features. The only way to get it right 100% is to use the parser
of GHC itself. Fortunately, now there is the
ghc package, which as
of version 8.4.1 exports enough of GHC’s source code to allow us use its
Alternative approaches, even decent ones like
don’t support cutting-edge features or do their work without sufficient
precision so that many tokens end up combined and the end result is
typically still hard to read.
How to use it in your blog
Depends on your markdown processor. If you’re an
mmark user, good
news, since version 0.2.1.0 of
mmark-ext it includes the
ghcSyntaxHighlighter extension. Due to flexibility of MMark, it’s possible
to use this highlighter for Haskell and
skylighting as a
fall-back for everything else. Consult the docs for more
skylighting is what Pandoc uses. And from what I can tell it’s hardcoded to use only that library for highlighting, so some creativity may be necessary to get it work.
CPP directives are not lexed correctly, because the GHC parser is not designed to parse them.
Issues, bugs, and questions may be reported in the GitHub issue tracker for this project.
Pull requests are also welcome.
Copyright © 2018–present Mark Karpov
Distributed under BSD 3 clause license.
GHC syntax highlighter 0.0.8.0
GHC syntax highlighter 0.0.7.0
GHC syntax highlighter 0.0.6.0
GHC syntax highlighter 0.0.5.0
GHC syntax highlighter 0.0.4.1
Works with GHC 8.8.
Dropped support for GHC 8.2.
GHC syntax highlighter 0.0.4.0
- Implemented highlighting of file header pragmas such as
LANGUAGE. They are not handled by the GHC lexer, so custom code were added for this purpose.
GHC syntax highlighter 0.0.3.1
- Fixed the bug when certain extensions such as
-XLambdaCasewere not enabled when the code was compiled with GHC 8.6.
GHC syntax highlighter 0.0.3.0
- Compiles with GHC 8.6.
GHC syntax highlighter 0.0.2.0
GHC syntax highlighter 0.0.1.0
- Initial release.