FM / extra

/usr/share/nano/extra

Name	Size	Mode	Actions
ada.nanorc	1263	0644	edit dl rm
fortran.nanorc	1959	0644	edit dl rm
haskell.nanorc	1009	0644	edit dl rm
povray.nanorc	637	0644	edit dl rm
spec.nanorc	2017	0644	edit dl rm

Edit: /usr/share/nano/extra/haskell.nanorc (1009B)

## Syntax highlighting for Haskell files.

## Original author:  Alex Taber
## License:  GPL version 3

syntax "haskell" "\.hs$"
comment "--"

# Various symbols
color cyan "\||@|!|:|_|~|=|\\|;||,|\[|\]|\{|\}"

# Operators
color magenta "==|/=|&&|\|\||<|>|<=|>="

# More symbols
color cyan "->|<-|=>"
color magenta "\.|\$"

# Special keyword
color brightred "undefined"

# Strings
color yellow ""([^"\]|\\.)*""
# Characters
color brightyellow "'([^'\]|\\.)'"

# Comments
color green "--.*"
color green start="\{-" end="-\}"

# Trailing whitespace
color ,green "[[:space:]]+$"

cmd: