template <typename T, std::size_t size>
class Vector
{
  T[size] values;
};

quote:

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template
class Vector
{
T values[size];
};

---

int x = 3;
int array[x]; <-- Error 

quote:

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Original post by duke
> A template parameter has two parts, the type parameter and the identifier. The type parameter defines the identifier to be a typename if declared using the 'class' or 'typename' keywords or a template name if declared using the 'template' keyword. Using the 'typename' or 'class' keywords allows you to pass in any type whether it is a class, struct, enumeration, bool, integral, or floating-point type.

Minor correction: A float (nor is a double) allowed as a template type. I think VC++ allows it, but it is dissallowed by the standard.

It is a good introductory article. I think the way you address what you actually have to do code wise to get started in templates is spot on.
[edited by - duke on January 13, 2004 8:47:15 PM]

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quote:

---

template <typename T>
T foo(T& param)
{
  return param + 1;
};
  
void sample()
{
  int delta;
  std::cout << foo<int>(delta);
};  

---

template <typename T>
T foo(T& param)
{
  return param + 1;
};
  
void sample()
{
  int delta;
  std::cout << foo(delta);
};  

quote:

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Original post by Ghwerig

quote:

---

template <typename T>
T foo(T& param)
{
  return param + 1;
};
  
void sample()
{
  int delta;
  std::cout << foo<int>(delta);
};   

---

template <typename T>
T foo(T& param)
{
  return param + 1;
};
  
void sample()
{
  int delta;
  std::cout << foo(delta);
};   

No need to supply a type argument. The compiler knows what type delta is and choses the right type for you.


[edited by - Ghwerig on January 14, 2004 1:30:55 PM]

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