patch 8.1.1056: no eval function for Ruby
Problem: No eval function for Ruby.
Solution: Add rubyeval(). (Ozaki Kiichi, closes #4152)
diff --git a/runtime/doc/if_ruby.txt b/runtime/doc/if_ruby.txt
index a98b620..e2e7742 100644
--- a/runtime/doc/if_ruby.txt
+++ b/runtime/doc/if_ruby.txt
@@ -11,7 +11,8 @@
3. Vim::Buffer objects |ruby-buffer|
4. Vim::Window objects |ruby-window|
5. Global variables |ruby-globals|
-6. Dynamic loading |ruby-dynamic|
+6. rubyeval() Vim function |ruby-rubyeval|
+7. Dynamic loading |ruby-dynamic|
{Vi does not have any of these commands}
*E266* *E267* *E268* *E269* *E270* *E271* *E272* *E273*
@@ -198,7 +199,16 @@
$curbuf The current buffer object.
==============================================================================
-6. Dynamic loading *ruby-dynamic*
+6. rubyeval() Vim function *ruby-rubyeval*
+
+To facilitate bi-directional interface, you can use |rubyeval()| function to
+evaluate Ruby expressions and pass their values to Vim script.
+
+The Ruby value "true", "false" and "nil" are converted to v:true, v:false and
+v:null, respectively.
+
+==============================================================================
+7. Dynamic loading *ruby-dynamic*
On MS-Windows and Unix the Ruby library can be loaded dynamically. The
|:version| output then includes |+ruby/dyn|.