commit cafd5cfca7754098ed4775d833cc10f07f21d859
parent 2fa8825bef667b63dda3a5987fdd5a24074658ad
Author: zeertzjq <zeertzjq@outlook.com>
Date: Fri, 21 Nov 2025 08:49:57 +0800
vim-patch:ddb88ab: runtime(haskell): allow spaces in backticked operators in syntax script
This formatting (although rare) is actually accepted by GHC, but vim
does not highlight it. This patch adds the simplest possible regex to
support the behavior.
Inconveniently, this might trigger weird formatting on lines that
contain errors, e.g. if the first backtick is removed from:
a `b` c `d` e
then `c` is going to be marked as an operator, which seems weird but is
valid.
closes: vim/vim#18776
https://github.com/vim/vim/commit/ddb88ab796bfb31267767c206684b3dd7ef0d040
Co-authored-by: Mirek Kratochvil <exa.exa@gmail.com>
Diffstat:
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/runtime/syntax/haskell.vim b/runtime/syntax/haskell.vim
@@ -2,6 +2,7 @@
" Language: Haskell
" Maintainer: Haskell Cafe mailinglist <haskell-cafe@haskell.org>
" Last Change: 2024 Mar 28 by Enrico Maria De Angelis <enricomaria.dean6elis@gmail.com>
+" 2025 Nov 20 by Vim Project: Allow spaces in backticks #18776
" Original Author: John Williams <jrw@pobox.com>
"
" Thanks to Ryan Crumley for suggestions and John Meacham for
@@ -46,8 +47,8 @@ syn match VarId "\(\<[A-Z][a-zA-Z0-9_']*\.\)*\<[a-z][a-zA-Z0-9_']*\>" contains=@
" others are variables (e.g. functions).
syn match hsVarSym "\(\<[A-Z][a-zA-Z0-9_']*\.\)\=[-!#$%&\*\+/<=>\?@\\^|~.][-!#$%&\*\+/<=>\?@\\^|~:.]*"
syn match hsConSym "\(\<[A-Z][a-zA-Z0-9_']*\.\)\=:[-!#$%&\*\+./<=>\?@\\^|~:]*"
-syn match hsVarSym "`\(\<[A-Z][a-zA-Z0-9_']*\.\)\=[a-z][a-zA-Z0-9_']*`"
-syn match hsConSym "`\(\<[A-Z][a-zA-Z0-9_']*\.\)\=[A-Z][a-zA-Z0-9_']*`"
+syn match hsVarSym "` *\(\<[A-Z][a-zA-Z0-9_']*\.\)\=[a-z][a-zA-Z0-9_']* *`"
+syn match hsConSym "` *\(\<[A-Z][a-zA-Z0-9_']*\.\)\=[A-Z][a-zA-Z0-9_']* *`"
" (Non-qualified) identifiers which start with # are labels
syn match hsLabel "#[a-z][a-zA-Z0-9_']*\>"
