C++Talk.NET

bluekite2000@gmail.com · Guest

Here is the code:

#include <iostream>
#include <complex>

typedef std::complex<float> ComplexSingle;

template <typename T>
class Vector
{
private:
int _size;
T* _vp;
void VecAlloc(int size)
{
_vp=new T[size];
}
public:
Vector()
{
}
Vector(int size)
:_size(size)
{
VecAlloc(size);
}
template<typename Other> Vector(const Vector<Other>& Vin)

{
_size=Vin.size();
VecAlloc(Vin.size());
vassign(Vin);

}
template<typename Other> void vassign( const Vector<Other>& Vin);

T& operator () (int pos)
{
return _vp[pos];
}
T operator () (int pos) const
{
return _vp[pos];
}
int size() const
{
return _size;
}
~Vector()
{
}
};

template<typename T>
template<typename Other> void Vector<T>::vassign(const Vector<Other>&
Vin)
{
for (int i=0;i<Vin.size();i++)
(*this)(i)=Vin(i);
}

template<> template<typename ComplexSingle> void
Vector<float>::vassign(const Vector<ComplexSingle>& Vin)
{
for (int i=0;i<Vin.size();i++)
(*this)(i)=std::norm(Vin(i));
}

int main (void)
{
Vector Vector<float>V2(V1);//Specialized function is called here.
Vector<double> V3(5);
Vector<float>V4(V3);//Compile error!
// instantiated from `Vector<T>::Vector(const Vector<Other>&) [with
//Other = double, T = float]'
//ex.cc:72: instantiated from here
//ex.cc:64: error: no matching function for call to `norm(double)'

return 0;
}

[ See http://www.gotw.ca/resources/clcm.htm for info about ]
[ comp.lang.c++.moderated. First time posters: Do this! ]

Greg · Guest

[email]bluekite2000 (AT) gmail (DOT) com[/email] wrote: