Dear ROOT-ers,
I have a very simple example of using a template class defined/implemented within a namespace. The header compiles and works just fine as a simple C++ program. When I try to compile the subject code with ROOT, I am having a trouble. I think a problem is due to a lack of my knowledge regarding CINT, thus posting a question here.
Only changes from a pure C++ version of my code into to-be-compiled-with-ROOT version of my code are (1) adding a ClassDefT(ClassName,ClassVersionID) and (2) #pragma for template classes used in a namespace. The attached codes below include (1) in Test.hh and (2) in LinkDef.h.
// Contents of LinkDef.h
#ifdef __CINT__
#pragma link off all globals;
#pragma link off all classes;
#pragma link off all functions;
#pragma link C++ namespace TEST;
#pragma link C++ class TEST::Container<string>+;
#pragma link C++ class TEST::Container<int>+;
#endif// Contents of Test.hh
#ifndef TEST_hh
#define TEST_hh
#include <string>
using std::string;
#include <map>
using std::map;
namespace TEST{
template< class XDataType >
class Container
{
public:
Container();
virtual ~Container()
{}
const XDataType operator[]( const int& aKey ) //const
{
typename MapType::const_iterator MapTypeIt = fMap.find(aKey);
if( MapTypeIt != fMap.end() )
{
return MapTypeIt->second;
}
return XDataType();
}
void Insert( const int& aKey, const XDataType& aDatum )
{
typename MapType::value_type aValue( aKey, aDatum );
fMap.insert( aValue );
return;
}
private:
typedef map< int, XDataType > MapType;
MapType fMap;
ClassDefT(Container<XDataType>,0)
};
enum PrefixKeys
{
kOne,
kTwo,
kThree
};
template<> Container<string>::Container()
{
Insert(kThree,"three!");
Insert(kOne,"one!");
Insert(kTwo,"two!");
}
static const Container<string> kPrefix;
template<> Container<int>::Container()
{
Insert(kOne,1);
Insert(kTwo,2);
Insert(kThree,3);
}
static const Container<int> kIntegers;
// orz orz orz
};
#endifI did:
rootcint -f TestCint.cc -c Test.hh LinkDef.h
which created TestCint.cc and TestCint.h.
g++ -pthread -m64 -I$ROOTSYS/include -c TestCint.cc
Then I get an error:
TestCint.cc: In function ‘int G__TestCint_383_0_16(G__value*, const char*, G__param*, int)’:
TestCint.cc:644: error: invalid use of ‘class TEST::Container<std::basic_string<char, std::char_traits, std::allocator > >’
TestCint.cc: In function ‘int G__TestCint_391_0_16(G__value*, const char*, G__param*, int)’:
TestCint.cc:827: error: invalid use of ‘class TEST::Container’
Would someone help me to find a simple mistake I making in here?