From 4cb692bec2d5d35cb21ed80e866d5cfb5961c91c Mon Sep 17 00:00:00 2001
From: Ingo Karkat <swdev@ingo-karkat.de>
Date: Thu, 25 Feb 2016 00:00:00 +0100
Subject: [PATCH] file creation

---
 autoload/ingo/compat/regexp.vim | 29 +++++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)
 create mode 100644 autoload/ingo/compat/regexp.vim

diff --git a/autoload/ingo/compat/regexp.vim b/autoload/ingo/compat/regexp.vim
new file mode 100644
index 0000000..b66585f
--- /dev/null
+++ b/autoload/ingo/compat/regexp.vim
@@ -0,0 +1,29 @@
+" ingo/compat/regexp.vim: Functions for regular expression compatibility.
+"
+" DEPENDENCIES:
+"
+" Copyright: (C) 2015 Ingo Karkat
+"   The VIM LICENSE applies to this script; see ':help copyright'.
+"
+" Maintainer:	Ingo Karkat <ingo@karkat.de>
+"
+" REVISION	DATE		REMARKS
+"   1.024.001	20-Feb-2015	file creation
+
+if exists('+regexpengine') " {{{2
+    " XXX: The new NFA-based regexp engine has a problem with non-greedy \s\{-}
+    " match together with the branches where only one is anchored; cp.
+    " http://article.gmane.org/gmane.editors.vim.devel/43712
+    " XXX: The new NFA-based regexp engine has a problem with the /\@<= pattern
+    " in combination with a back reference \1; cp.
+    " http://article.gmane.org/gmane.editors.vim.devel/46596
+    function! ingo#compat#regexp#GetOldEnginePrefix()
+	return '\%#=1'
+    endfunction
+else
+    function! ingo#compat#regexp#GetOldEnginePrefix()
+	return ''
+    endfunction
+endif
+
+" vim: set ts=8 sts=4 sw=4 noexpandtab ff=unix fdm=syntax :