Code duplication between typedefs and explicit instantiations

Question

tree.h

template
class binary_operation : public node
{
// ... unimportant details ...

    unsigned evaluate() const;
         


        

Answer 1

Use a macro. You could write a header like

I_HATE_MACROS(binary_operation, '+'>, addition)
I_HATE_MACROS(binary_operation, '*'>, multiplication)

Then you can do

#define I_HATE_MACROS(a, b) typedef a b;

Or

#define I_HATE_MACROS(a, b) template class a;

Then

#include "DisgustingMacroHackery.h"