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
---
 NEWS | 11 +++++++++++
 1 file changed, 11 insertions(+)

(limited to 'NEWS')

diff --git a/NEWS b/NEWS
index 800974eadd..8a2c7f5846 100644
--- a/NEWS
+++ b/NEWS
@@ -18,6 +18,17 @@ with all sufficient information, see the ChangeLog file.
   * besides, --enable/--disable=frozen-string-literal options also have
     been introduced.
 
+* safe navigation operator:
+
+  * new method call syntax, `object.?foo', method #foo is called on
+    `object' if it is not nil.
+    this is similar to `try!' in ActiveSupport, except for:
+    * method name is syntactically required
+          obj.try! {} # valid
+          obj.? {}    # syntax error
+    * attribute assignment is valid
+          obj.?attr += 1
+
 === Core classes updates (outstanding ones only)
 
 * ARGF
-- 
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