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+<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"
+          "http://www.w3.org/TR/html4/strict.dtd">
+<html>
+<head>
+<title>Clang 3.1 Release Notes</title>
+<link type="text/css" rel="stylesheet" href="../menu.css">
+<link type="text/css" rel="stylesheet" href="../content.css">
+<style type="text/css">
+td {
+	vertical-align: top;
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+</style>
+</head>
+<body>
+
+<!--#include virtual="../menu.html.incl"-->
+
+<div id="content">
+
+<h1>Clang 3.1 Release Notes</h1>
+
+<img style="float:right" src="http://llvm.org/img/DragonSmall.png"
+     width="136" height="136" alt="LLVM Dragon Logo">
+
+<ul>
+  <li><a href="#intro">Introduction</a></li>
+  <li><a href="#whatsnew">What's New in Clang 3.1?</a>
+    <ul>
+      <li><a href="#cchanges">C Language Changes</a></li>
+      <li><a href="#cxxchanges">C++ Language Changes</a></li>
+      <li><a href="#objcchanges">Objective-C Language Changes</a></li>
+      <li><a href="#pythonchanges">Python Binding Changes</a></li>
+    </ul>
+  </li>
+  <li><a href="#additionalinfo">Additional Information</a></li>
+</ul>
+
+<div class="doc_author">
+  <p>Written by the <a href="http://llvm.org/">LLVM Team</a></p>
+</div>
+
+<!-- ======================================================================= -->
+<h2 id="intro">Introduction</h2>
+<!-- ======================================================================= -->
+
+<p>This document contains the release notes for the Clang C/C++/Objective-C
+frontend, part of the LLVM Compiler Infrastructure, release 3.1.  Here we
+describe the status of Clang in some detail, including major improvements from
+the previous release and new feature work. For the general LLVM release notes,
+see <a href="http://llvm.org/docs/ReleaseNotes.html">the LLVM
+ documentation</a>. All LLVM releases may be downloaded from the
+<a href="http://llvm.org/releases/">LLVM releases web site</a>.</p>
+
+<p>For more information about Clang or LLVM, including information about the
+latest release, please check out the main please see the
+<a href="http://clang.llvm.org">Clang Web Site</a> or the
+<a href="http://llvm.org">LLVM Web Site</a>.
+
+<p>Note that if you are reading this file from a Subversion checkout or the main
+Clang web page, this document applies to the <i>next</i> release, not the
+current one.  To see the release notes for a specific release, please see the
+<a href="http://llvm.org/releases/">releases page</a>.</p>
+
+<!-- ======================================================================= -->
+<h2 id="whatsnew">What's New in Clang 3.1?</h2>
+<!-- ======================================================================= -->
+
+<p>Some of the major new features and improvements to Clang are listed here.
+Generic improvements to Clang as a whole or two its underlying infrastructure
+are described first, followed by language-specific sections with improvements to
+Clang's support for those languages.</p>
+
+<!-- = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = -->
+<h3 id="cchanges">C Language Changes in Clang</h3>
+<!-- = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = -->
+
+<h4 id="c11changes">C11 Feature Support</h4>
+
+<p>Clang 3.1 adds support for anonymous structs and anonymous unions, added in
+the latest ISO C standard. Use <code>-std=c11</code> or <code>-std=gnu11</code>
+to enable support for the new language standard. The new C11 features are
+backwards-compatible and are available as an extension in all language
+modes.</p>
+
+<p>All warning and language selection flags which previously accepted
+<code>c1x</code> have been updated to accept <code>c11</code>. The old
+<code>c1x</code> forms have been removed.
+
+<!-- = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = -->
+<h3 id="cxxchanges">C++ Language Changes in Clang</h3>
+<!-- = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = -->
+
+<h4 id="cxx11changes">C++11 Feature Support</h4>
+<p>Clang 3.1 supports
+<a href="http://clang.llvm.org/cxx_status.html#cxx11">most of the language
+features</a> added in the latest ISO C++ standard,
+<a href="http://www.iso.org/iso/iso_catalogue/catalogue_tc/catalogue_detail.htm?csnumber=50372">C++ 2011</a>.
+Use <code>-std=c++11</code> or <code>-std=gnu++11</code> to enable support for
+these features. In addition to the features supported by Clang 3.0, the
+following are now considered to be of production quality:
+<ul>
+  <li>Generalized constant expressions</li>
+  <li>Lambda expressions</li>
+  <li>Generalized initializers</li>
+  <li>Unrestricted unions</li>
+  <li>User-defined literals</li>
+  <li>Forward-declared enumerations</li>
+  <li>Atomics (both libc++'s and libstdc++4.7's <tt>&lt;atomic&gt;</tt> are
+      supported)</li>
+</ul>
+
+<!-- = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = -->
+<h3 id="objcchanges">Objective-C Language Changes in Clang</h3>
+<!-- = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = -->
+Clang 3.1 introduces several new Objective-C language features and improvements.
+
+<h4 id="literals-subscripting">Objective-C literals and subscripting</h3>
+
+<p>Objective-C now provides additional literal expressions, including numeric, array, and dictionary literals. Additionally, array and dictionary elements can be accesses via the subscripting operator. For more information about the new literals, see the <a href="ObjectiveCLiterals.html">documentation for Objective-C literals and subscripting</a>.
+
+<h4 id="objcwformat">Format string checking for NSString literals</h4>
+
+<code>-Wformat</code> now checks <code>@"NSString literals"</code>.
+
+<!-- = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = -->
+<h3 id="pythonchanges">Python Binding Changes</h3>
+<!-- = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = -->
+
+The following methods have been added:
+<ul>
+  <li>SourceLocation.from_position (static)</li>
+  <li>SourceLocation.__eq__ and SourceLocation.__ne__</li>
+  <li>SourceRange.__eq__ and SourceRange.__ne__</li>
+  <li>Diagnostic.category_number (property)</li>
+  <li>Diagnostic.category_name (property)</li>
+  <li>Diagnostic.option (property)</li>
+  <li>Diagnostic.disable_option (property)</li>
+  <li>CursorKind.is_translation_unit</li>
+  <li>CursorKind.is_preprocessing</li>
+  <li>CursorKind.is_unexposed</li>
+  <li>Cursor.from_location (static)</li>
+  <li>Cursor.underlying_typedef_type (property)</li>
+  <li>Cursor.enum_type (property)</li>
+  <li>Cursor.objc_type_encoding (property)</li>
+  <li>Cursor.hash</li>
+  <li>TypeKind.spelling</li>
+  <li>Type.argument_types</li>
+  <li>Type.element_type (property)</li>
+  <li>Type.element_count (property)</li>
+  <li>Type.is_function_variadic</li>
+  <li>Type.is_pod</li>
+  <li>Type.get_array_element_type</li>
+  <li>Type.get_array_size</li>
+  <li>Type.__eq__ and Type.__ne__</li>
+  <li>File.from_name (static)</li>
+  <li>File.__str__ and File.__repr__</li>
+</ul>
+
+<!-- ======================================================================= -->
+<h2 id="additionalinfo">Additional Information</h2>
+<!-- ======================================================================= -->
+
+<p>A wide variety of additional information is available on the
+<a href="http://clang.llvm.org/">Clang web page</a>.  The web page contains
+versions of the API documentation which are up-to-date with the Subversion
+version of the source code.  You can access versions of these documents specific
+to this release by going into the "<tt>clang/doc/</tt>" directory in the Clang
+tree.</p>
+
+<p>If you have any questions or comments about Clang, please feel free to
+contact us via the <a href="http://lists.cs.uiuc.edu/mailman/listinfo/cfe-dev">
+mailing list</a>.</p>
+
+
+</div>
+</body>
+</html>