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Tip of the Day
Home » Tip Bank » C++
Language: C++
Expertise: Beginner
Jul 31, 2001

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Template Parameters and Template Arguments


The terms template argument and template parameter do not mean the same thing. A template parameter is a symbol, or a placeholder which is replaced by the actual argument when you instantiate a template. For example, T in the following template is a template parameter:
 
template < class T > class List
{
 //..
};

A template argument is a typename or a const value that a template instance uses. For example:
 
List <int> li; // 'int' is a template argument

The parameter T is substituted for the arguments 'int' when the List<int> specialization is instantiated.
Danny Kalev
 
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