fix :: pattern to consider comments

Author: mateoxh

indent/haskell.vim

@@ -2,7 +2,7 @@
 " Filename: indent/haskell.vim
 " Author: itchyny
 " License: MIT License
-" Last Change: 2025/03/03 09:45:31.
+" Last Change: 2025/04/15 08:09:38.
 " =============================================================================
 
 if exists('b:did_indent')
@@ -76,16 +76,16 @@ function! GetHaskellIndent() abort
   endif
 
   " =
+  if line =~# '\v^\s*\='
+    return s:indent_eq()
+  endif
+
   if line =~# '\v\='
     if getline(v:lnum - 1) =~# '\v^\s*-\>'
       return indent(v:lnum - 1) - &shiftwidth
     endif
   endif
 
-  if line =~# '\v^\s*\='
-    return s:indent_eq()
-  endif
-
   " }, ], )
   if line =~# '\v^\s*[})\]]'
     return s:indent_parenthesis()
@@ -275,6 +275,11 @@ function! GetHaskellIndent() abort
     return s:indent('', '\v^\s*\zs.*<let>', 0, -1)
   endif
 
+  " ::
+  if nonblankline =~# '\v::\s*%(--.*)?$'
+    return indent(v:lnum - 1) + &shiftwidth
+  endif
+
   if nonblankline =~# '::'
     return s:indent('', nonblankline =~# '\v,\s*%(--.*)?$' ? '\S' : '\v\{\s*\<\w+\s*::', 0, match(nonblankline, '\S'))
   endif