[llvm-pdbdump] Add an option to dump full class definitions.

This adds the --class-definitions flag.  If specified, when dumping
types, instead of "class Foo" you will see the full class definition,
with member functions, constructors, access specifiers.

NOTE: Using this option can be very slow, as generating a full class
definition requires accessing many different parts of the PDB.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@230203 91177308-0d34-0410-b5e6-96231b3b80d8

lib/DebugInfo/PDB/PDBSymbolData.cpp

@@ -9,6 +9,7 @@
 
 #include "llvm/DebugInfo/PDB/PDBSymbolData.h"
 
+#include "llvm/DebugInfo/PDB/IPDBSession.h"
 #include "llvm/DebugInfo/PDB/PDBSymDumper.h"
 
 #include <utility>
@@ -19,6 +20,10 @@ PDBSymbolData::PDBSymbolData(const IPDBSession &PDBSession,
                              std::unique_ptr<IPDBRawSymbol> DataSymbol)
     : PDBSymbol(PDBSession, std::move(DataSymbol)) {}
 
+std::unique_ptr<PDBSymbol> PDBSymbolData::getType() const {
+  return Session.getSymbolById(getTypeId());
+}
+
 void PDBSymbolData::dump(raw_ostream &OS, int Indent,
                          PDBSymDumper &Dumper) const {
   Dumper.dump(*this, OS, Indent);