Method reference operator

Introduce the new operator for method reference, `.:`.
[Feature #12125] [Feature #13581]
[EXPERIMENTAL]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@66667 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

2 files changed, 9 insertions, 0 deletions

diff --git a/test/ripper/test_parser_events.rb b/test/ripper/test_parser_events.rb
index 95ec661fcf..3c78daf16e 100644
--- a/test/ripper/test_parser_events.rb
+++ b/test/ripper/test_parser_events.rb
@@ -434,6 +434,13 @@ class TestRipper::ParserEvents < Test::Unit::TestCase
     assert_equal "[call(ref(self),&.,foo,[])]", tree
   end
 
+  def test_methref
+    thru_methref = false
+    tree = parse("obj.:foo", :on_methref) {thru_methref = true}
+    assert_equal true, thru_methref
+    assert_equal "[methref(vcall(obj),foo)]", tree
+  end
+
   def test_excessed_comma
     thru_excessed_comma = false
     parse("proc{|x,|}", :on_excessed_comma) {thru_excessed_comma = true}
diff --git a/test/ripper/test_scanner_events.rb b/test/ripper/test_scanner_events.rb
index c9fce34a77..94df6616e8 100644
--- a/test/ripper/test_scanner_events.rb
+++ b/test/ripper/test_scanner_events.rb
@@ -550,6 +550,8 @@ class TestRipper::ScannerEvents < Test::Unit::TestCase
                  scan('op', ':[]=')
     assert_equal ['&.'],
                  scan('op', 'a&.f')
+    assert_equal %w(.:),
+                 scan('op', 'obj.:foo')
     assert_equal [],
                  scan('op', %q[`make all`])
   end