* array.c: Improve and fix documentation for Array#dig

  [#11776]

* hash.c: ditto

* struct.c: ditto

* test_hash.rb: Add basic test for user defined `dig`.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@52941 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 6 insertions, 0 deletions

diff --git a/test/ruby/test_hash.rb b/test/ruby/test_hash.rb
index 77417ecbe0..c08908fa76 100644
--- a/test/ruby/test_hash.rb
+++ b/test/ruby/test_hash.rb
@@ -1306,6 +1306,12 @@ class TestHash < Test::Unit::TestCase
     h = @cls[a: @cls[b: [1, 2, 3]], c: 4]
     assert_equal(1, h.dig(:a, :b, 0))
     assert_nil(h.dig(:c, 1))
+    o = Object.new
+    def o.dig(*args)
+      {dug: args}
+    end
+    h[:d] = o
+    assert_equal({dug: [:foo, :bar]}, h.dig(:d, :foo, :bar))
   end
 
   def test_cmp