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Subject: Re: How to get generic formal parameter type into base class
From: kevin andrew <kevin.miscellaneous@gmail.com>
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Date: 2012-10-11T13:25:13-07:00
List-Id: <comp.lang.ada>


Thanks Adam,
Your solution is the workaround I had used. Ada is so strongly type
cast I didn't think I would be able to do what I wanted.
FYI, you can do this with C++ template classes, and though I have
never tried, Java has added templates as well.
C solution:

#include <iostream>
using namespace std;

typedef int value_t;


template <typename T>
class baseClass
{
public:
   baseClass( ) {  }

   void decode  ( value_t value ) { }
   T    getValue( void ) { }

protected:
   T data;
   value_t value;

private:

};

template <typename T>
class newClass : public baseClass<T>
{

public:
   newClass()  { }
   void decode  ( value_t value )
   {
      this->value = value;
      this->data = (T)value;
   }
   T  getValue( void )
   {
      return this->data;
   }

private:

};


int main()
{
   newClass<int> intClass;
   newClass<char> charClass;

   value_t value = 4;
   intClass.decode(value);
   int i = intClass.getValue();

   value = 97;
   charClass.decode(value);
   char ch = charClass.getValue();

   cout << "int=" << i << "  ch=" << ch  << endl;

}