In computer science
are a technique that allows one value to take different datatype
) as long as certain contracts (so-called subtype
) are kept. The programming style with it is called "generic programming".
Among OOP languages, C++, Beta, Eiffel, Ada, and later versions of Java provides generic facility. In C++, templates support generics and popularized the notion of generics.
For example, in C++ code,
T max (T x, T y)
if (x < y)
In this case, a pseudo-datatype T is called "subtype". T can be anything that can be compared.
Uncommon, template metaprogramming is a way of making algorithms evaluate when your code is compiled.
See also Partial evaluation