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-rw-r--r--runtime/doc/options.txt9
1 files changed, 8 insertions, 1 deletions
diff --git a/runtime/doc/options.txt b/runtime/doc/options.txt
index b4eb3b6f28..bc2a8ae263 100644
--- a/runtime/doc/options.txt
+++ b/runtime/doc/options.txt
@@ -406,7 +406,14 @@ The value of a few options, such as 'foldexpr', is an expression that is
evaluated to get a value. The evaluation can have quite a bit of overhead.
One way to minimize the overhead, and also to keep the option value very
simple, is to define a function and set the option to call it without
-arguments.
+arguments. A |v:lua-call| can also be used. Example: >vim
+ lua << EOF
+ function _G.MyFoldFunc()
+ -- ... compute fold level for line v:lnum
+ return level
+ end
+ EOF
+ set foldexpr=v:lua.MyFoldFunc()
Setting the filetype