In the generic programming/TMP world what exactly is a model / a policy and a "concept" ?

Posted by Hassan Syed on Stack Overflow See other posts from Stack Overflow or by Hassan Syed
Published on 2010-02-06T15:49:01Z Indexed on 2010/05/15 20:04 UTC
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Filed under:

templates

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metaprogramming

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c++

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generic-programming

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components

I'd like to know the precise yet succinct definitions of these three concepts in one place. The quality of the answer should depend on the following two points.

Show a simple code snippet to show how and what the concept/technique is used for.
Be simple enough to understand so that a programmer without any exposure to this area can grasp it.

Note:

There are probably many correct answers since each concept has many different facets. If there are a lot of good answers I will eventually turn the question into CW and aggregate the answers.

-- Post Accept Edit --

Boost has a nice article on generic programming concepts

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