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Template metaprogramming (TMP) is a metaprogramming technique in which templates are used by a compiler to generate temporary source code, which is merged by the compiler with the rest of the source code and then compiled. The output of these templates can include compile-time constants, data structures, and complete functions. The use of templates can be thought of as compile-time polymorphism. The technique is used by a number of languages, the best-known being C++, but also Curl, D, Nim, and XL.
Template metaprogramming was, in a sense, discovered accidentally.[1][2]
Some other languages support similar, if not more powerful, compile-time facilities (such as Lisp macros), but those are outside the scope of this article.
- ^ Scott Meyers (12 May 2005). Effective C++: 55 Specific Ways to Improve Your Programs and Designs. Pearson Education. ISBN 978-0-13-270206-5.
- ^ See History of TMP on Wikibooks