From 76355dee686254dcf51fcd42fbe13c8f00c3aa95 Mon Sep 17 00:00:00 2001
From: "Yukihiro \"Matz\" Matsumoto" <matz@ruby.or.jp>
Date: Sat, 14 Sep 2019 23:20:57 +0900
Subject: Add unavailability of declaration form of visibility methods; #4708

---
 doc/limitations.md | 38 +++++++++++++++++++++++++++++++++++++-
 1 file changed, 37 insertions(+), 1 deletion(-)

(limited to 'doc')

diff --git a/doc/limitations.md b/doc/limitations.md
index e6f40a942..6958d396f 100644
--- a/doc/limitations.md
+++ b/doc/limitations.md
@@ -96,7 +96,7 @@ p Liste.new "foobar"
 ## Method visibility
 
 For simplicity reasons no method visibility (public/private/protected) is
-supported.
+supported. Those methods are defined but they are dummy methods.
 
 ```ruby
 class VisibleTest
@@ -126,6 +126,42 @@ true
 true
 ```
 
+### Visibility Declaration
+
+The declaration form of following visibility methods are not implemented.
+
+* `public`
+* `private`
+* `protected`
+* `module_function`
+
+Especially, `module_function` method is not dummy, but no declaration form.
+
+```
+module TestModule
+  module_function
+  def test_func
+    p 'test_func called'
+  end
+
+  test_func
+end
+
+p 'ok'
+```
+
+#### Ruby [ruby 2.5.5p157 (2019-03-15 revision 67260)]
+
+```
+ok
+```
+
+#### mruby [2.0.1 (2019-4-4)]
+
+```
+test.rb:8: undefined method 'test_func' (NoMethodError)
+```
+
 ## `defined?`
 
 The `defined?` keyword is considered too complex to be fully
-- 
cgit v1.2.3