Commit: runtime(erlang): add support for matchit plugin (#13713)

[Christian Brabandt]

runtime(erlang): add support for matchit plugin (#13713)

Commit: https://github.com/vim/vim/commit/18ab6c3392ef83abf078042e233d085fe80b6c06
Author: Csaba Hoch <csaba...@gmail.com>
Date: Thu Dec 21 17:16:28 2023 +0100

runtime(erlang): add support for matchit plugin (https://github.com/vim/vim/issues/13713)

This commit updates the Erlang runtime files to be in sync with the
`vim-erlang-runtime` repository. In particular, it adds the following
commit (with some cleanup and simplification afterwards):
https://github.com/vim-erlang/vim-erlang-runtime/commit/6ea8b85bc9c93b94c68ec53489a74f5687d898b0

Signed-off-by: Csaba Hoch <csaba...@gmail.com>
Signed-off-by: Doug Kearns <dougk...@gmail.com>
Signed-off-by: Christian Brabandt <c...@256bit.org>

diff --git a/runtime/ftplugin/erlang.vim b/runtime/ftplugin/erlang.vim
index 31fa0c321..1cb57f4c8 100644
--- a/runtime/ftplugin/erlang.vim
+++ b/runtime/ftplugin/erlang.vim
@@ -5,7 +5,8 @@
" Contributors: Ricardo Catalinas Jim茅nez <jimen...@gmail.com>
" Eduardo Lopez (http://github.com/tapichu)
" Arvid Bjurklint (http://github.com/slarwise)
-" Last Update: 2021-Nov-22
+" Pawe艂 Zacharek (http://github.com/subc2)
+" Last Update: 2023-Dec-20
" License: Vim license
" URL: https://github.com/vim-erlang/vim-erlang-runtime

@@ -57,7 +58,7 @@ setlocal suffixesadd=.erl,.hrl
let &l:include = '^\s*-\%(include\|include_lib\)\s*("\zs *\ze")'
let &l:define = '^\s*-\%(define\|record\|type\|opaque\)'

-let s:erlang_fun_begin = '^ \w*(.*$'
+let s:erlang_fun_begin = '^\l[A-Za-z0-9_@]*(.*$'
let s:erlang_fun_end = '^[^%]*\.\s*\(%.*\)\?$'

if !exists('*GetErlangFold')
@@ -95,9 +96,22 @@ if !exists('*ErlangFoldText')
endfunction
endif

+" The following lines enable the macros/matchit.vim plugin for extended
+" matching with the % key.
+let b:match_ignorecase = 0
+let b:match_words =
+ \ '\<\%(begin\|case\|fun\|if\|maybe\|receive\|try\)\>' .
+ \ ':\<\%(after\|catch\|else\|of\)\>' .
+ \ ':\<end\>,' .
+ \ '^\l[A-Za-z0-9_@]*' .
+ \ ':^\%(\%( \| \{' . shiftwidth() .
+ \ '}\)\%([^ \ %][^%]*\)\?\)\?;\s*\%(%.*\)\?$\|\.[ \ %]\|\.$'
+let b:match_skip = 's:comment\|string\|erlangmodifier\|erlangquotedatom'
+
let b:undo_ftplugin = "setlocal keywordprg< foldmethod< foldexpr< foldtext<"
\ . " comments< commentstring< formatoptions< suffixesadd< include<"
\ . " define<"
+ \ . " | unlet b:match_ignorecase b:match_words b:match_skip"

let &cpo = s:cpo_save
unlet s:cpo_save