Automatic Reference Counting.

Language-design credit goes to a lot of people, but I particularly want
to single out Blaine Garst and Patrick Beard for their contributions.

Compiler implementation credit goes to Argyrios, Doug, Fariborz, and myself,
in no particular order.

llvm-svn: 133103

1 files changed, 7 insertions, 0 deletions

diff --git a/clang/docs/LanguageExtensions.html b/clang/docs/LanguageExtensions.html
index 8f43725d82a..cce2e8c5b09 100644
--- a/clang/docs/LanguageExtensions.html
+++ b/clang/docs/LanguageExtensions.html
@@ -65,6 +65,7 @@ td {
 <li><a href="#objc_features">Objective-C Features</a>
   <ul>
     <li><a href="#objc_instancetype">Related result types</a></li>
+    <li><a href="#objc_arc">Automatic reference counting</a></li>
   </ul>
 </li>
 <li><a href="#overloading-in-c">Function Overloading in C</a></li>
@@ -670,6 +671,12 @@ with a related result type is treated the same way as method without a
 related result type.</p>
 
 <!-- ======================================================================= -->
+<h2 id="objc_arc">Automatic reference counting </h2>
+<!-- ======================================================================= -->
+
+<p>Clang provides support for <a href="AutomaticReferenceCounting.html">automated reference counting</a> in Objective-C, which eliminates the need for manual retain/release/autorelease message sends. There are two feature macros associated with automatic reference counting: <code>__has_feature(objc_arc)</code> indicates the availability of automated reference counting in general, while <code>__has_feature(objc_arc_weak)</code> indicates that automated reference counting also includes support for <code>__weak</code> pointers to Objective-C objects.</p>
+
+<!-- ======================================================================= -->
 <h2 id="overloading-in-c">Function Overloading in C</h2>
 <!-- ======================================================================= -->