BoostCon tutorial notes, temporary

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@103520 91177308-0d34-0410-b5e6-96231b3b80d8
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+<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"
+          "http://www.w3.org/TR/html4/strict.dtd">
+<html>
+<head>
+  <META http-equiv="Content-Type" content="text/html; charset=ISO-8859-1" />
+  <title>Clang - Quick Tutorial</title>
+  <link type="text/css" rel="stylesheet" href="menu.css" />
+  <link type="text/css" rel="stylesheet" href="content.css" />
+</head>
+<body>
+
+<!--#include virtual="menu.html.incl"-->
+
+<div id="content">
+
+<h1>Tutorial</h1>
+
+  <p>Invoking the BoostCon tool:</p>
+  <pre>
+$ clang -cc1 -boostcon t.cpp
+</pre>
+
+  <p>Teach the BoostCon action to identify and print C++ classes:</p>
+  <pre>
+bool VisitCXXRecordDecl(CXXRecordDecl *D) {
+  std::cout &lt;&lt; D-&gt;getNameAsString() 
+    &lt;&lt; '\n';
+  return false;
+}
+</pre>
+
+  <p>Walk and print base classes of a class:</p>
+  <pre>
+for(CXXRecordDecl::base_class_iterator 
+      B = D-&gt;bases_begin(), BEnd = D-&gt;bases_end();
+      B != BEnd; ++B) {
+  QualType BaseType = B-&gt;getType();
+  std::cout &lt;&lt; "  " &lt;&lt; BaseType.getAsString() 
+    &lt;&lt; '\n';
+}
+</pre>
+
+  <p>Retrieve the C++ class declaration from a base type:</p>
+  <pre>
+if (const RecordType *RTy
+             = BaseType-&gt;getAs&lt;RecordType&gt;()) { 
+  RecordDecl *Base = RTy-&gt;getDecl();
+  if (CXXRecordDecl *BaseCXX
+        = dyn_cast&lt;CXXRecordDecl&gt;(Base)) {
+  
+  }
+}
+</pre>
+</div>
+</body>
+</html>