From e2384dd69c624555916b1162b0e7f9bd6a8480a4 Mon Sep 17 00:00:00 2001
From: nobu <nobu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Mon, 16 Nov 2015 09:21:56 +0000
Subject: struct.c: dig

* object.c (rb_obj_dig): dig in nested structs too.
* struct.c (rb_struct_dig): new method Struct#dig.
  [Feature #11688]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@52596 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 test/ruby/test_struct.rb | 7 +++++++
 1 file changed, 7 insertions(+)

(limited to 'test/ruby/test_struct.rb')

diff --git a/test/ruby/test_struct.rb b/test/ruby/test_struct.rb
index f51432cfd6..780d344b8e 100644
--- a/test/ruby/test_struct.rb
+++ b/test/ruby/test_struct.rb
@@ -353,6 +353,13 @@ module TestStruct
     assert_equal "[Bug #9353]", x.send(:a=, "[Bug #9353]")
   end
 
+  def test_dig
+    klass = @Struct.new(:a)
+    o = klass.new(klass.new({b: [1, 2, 3]}))
+    assert_equal(1, o.dig(:a, :a, :b, 0))
+    assert_nil(o.dig(:b, 0))
+  end
+
   class TopStruct < Test::Unit::TestCase
     include TestStruct
 
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