patch 9.1.1341: cannot define completion triggers
Problem: Cannot define completion triggers and act upon it
Solution: add the new option 'isexpand' and add the complete_match()
function to return the completion matches according to the
'isexpand' setting (glepnir)
Currently, completion trigger position is determined solely by the
'iskeyword' pattern (\k\+$), which causes issues when users need
different completion behaviors - such as triggering after '/' for
comments or '.' for methods. Modifying 'iskeyword' to include these
characters has undesirable side effects on other Vim functionality that
relies on keyword definitions.
Introduce a new buffer-local option 'isexpand' that allows specifying
different completion triggers and add the complete_match() function that
finds the appropriate start column for completion based on these
triggers, scanning backwards from cursor position.
This separation of concerns allows customized completion behavior
without affecting iskeyword-dependent features. The option's
buffer-local nature enables per-filetype completion triggers.
closes: #16716
Signed-off-by: glepnir <glephunter@gmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/runtime/optwin.vim b/runtime/optwin.vim
index c5e77af..941a63c 100644
--- a/runtime/optwin.vim
+++ b/runtime/optwin.vim
@@ -1,7 +1,7 @@
" These commands create the option window.
"
" Maintainer: The Vim Project <https://github.com/vim/vim>
-" Last Change: 2025 Apr 07
+" Last Change: 2025 Apr 24
" Former Maintainer: Bram Moolenaar <Bram@vim.org>
" If there already is an option window, jump to that one.
@@ -1254,6 +1254,8 @@
call <SID>OptionG("isf", &isf)
call <SID>AddOption("isident", gettext("specifies the characters in an identifier"))
call <SID>OptionG("isi", &isi)
+call <SID>AddOption("isexpand", gettext("defines trigger strings for complete_match()"))
+call append("$", "\t" .. s:local_to_buffer)
call <SID>AddOption("iskeyword", gettext("specifies the characters in a keyword"))
call append("$", "\t" .. s:local_to_buffer)
call <SID>OptionL("isk")