From a356fe1c3550892902103f66928426ac8279e072 Mon Sep 17 00:00:00 2001
From: nobu <nobu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Thu, 22 Oct 2015 06:30:12 +0000
Subject: Safe navigation operator

* compile.c (iseq_peephole_optimize): peephole optimization for
  branchnil jumps.
* compile.c (iseq_compile_each): generate save navigation operator
  code.
* insns.def (branchnil): new opcode to pop the tos and branch if
  it is nil.
* parse.y (NEW_QCALL, call_op, parser_yylex): parse token '.?'.
  [Feature #11537]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@52214 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 test/ruby/test_call.rb | 12 ++++++++++++
 1 file changed, 12 insertions(+)

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

diff --git a/test/ruby/test_call.rb b/test/ruby/test_call.rb
index 5b81eb187a..14b6a6431b 100644
--- a/test/ruby/test_call.rb
+++ b/test/ruby/test_call.rb
@@ -31,4 +31,16 @@ class TestCall < Test::Unit::TestCase
     assert_nothing_raised(ArgumentError) {o.foo}
     assert_raise_with_message(ArgumentError, e.message, bug9622) {o.foo(100)}
   end
+
+  def test_safe_call
+    s = Struct.new(:x, :y)
+    o = s.new("x")
+    assert_equal("X", o.x.?upcase)
+    assert_nil(o.y.?upcase)
+    assert_equal("x", o.x)
+    o.?x = 6
+    assert_equal(6, o.x)
+    o.?x *= 7
+    assert_equal(42, o.x)
+  end
 end
-- 
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