[C++] Overloading in classi template

[MacApp]

Eccoti un esempio:

//
// 3 november 2007
// Compiled and tested with:
// i686-apple-darwin8-gcc-4.0.1 (GCC) 4.0.1 (Apple Computer, Inc. build 5367)
//

#include <iostream>

namespace ig{
    template <typename T>
    class GTest{
        private:
        const T fField;
        
        public:
        void Dump (void) const;
        
        public:
        GTest (const T theField);
        GTest (const GTest <T> &theTest);
        GTest<T> operator + (const GTest <T> &theTest) const;
    };
}

namespace ig{    
    template <typename T>
    GTest<T>::GTest (const GTest <T> &theTest):
    fField (theTest.fField){
    }
    
    template <typename T>
    GTest<T>::GTest (const T theField):
    fField (theField){
    }
    
    template <typename T>
    GTest<T> GTest <T>::operator + (const GTest <T> &theTest) const{
        return GTest <T> (fField + theTest.fField);
    }
    
    template <typename T>
    void GTest<T>:: Dump (void) const{
        std::cout << "fField: " << fField << ";" << std::endl;
    }    
}

int main (int argc, char * const argv[]){
    typedef ig::GTest <int> TestInt;
    const TestInt aTest1 (1);
    const TestInt aTest2 (2);
    const TestInt aTestSigma = aTest1 + aTest2;
    aTestSigma.Dump (); // it prints out: fField: 3;
    return 0;
}