www/clang-tutorial.html


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<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>
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