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. Starting off the list for examples of metaprogramming is monkey patching. Template metaprogramming template metaprogramming is a turing complete language every intuitive computable number can be computed meaning. This could be done to improve your programs runtime performance in exchange for slower compile times or simply to make the programmers work easier. The introduction to template metaprogramming in the guidelines. And inspiring introduction to template metaprogramming. I give an introduction to template metaprogramming, show how the typetraits library allows you the use template metaprogramming in a well structured and a portable way, and how you can use constexpr functions to replace template metaprogramming magic with ordinary functions. Lipari scuola superiore santanna template metaprogramming april 6, 2011 2 41. Monkey patching is an object oriented programming technique that allows developers to. This post starts a series of articles following the contrived and tortuous path down insanity lane. Concepts, tools, and techniques from boost and beyond david abrahams, aleksey gurtovoy. Concepts, tools, and techniques from boost and beyond with cd 05 edition 9780321227256 by david abrahams and aleksey gurtovoy for up to 90% off at.
This can get quite complex, as the template effectively chooses what code to generate, conditionally. The two newer standards are not used in the code so that the examples can be rich. When we write code it usually looks the same for many different functions. A complete mpl reference manual, in html and pdf form. However, it will be used to generate complete functions. Algorithms are expressed using template recursion as a looping construct and class template specialization as a conditional construct.
Mos 4465a is an advanced financial ac gold advanced maximiser with key. Concepts, tools, and techniques from boost and beyond pdf, epub, docx and torrent then this site is not for you. Template metaprograms consist of class templates operating on numbers andor types as data. In c, as in practically all programming languages, the. This is basically thorough documentation for the boost mpl. This is very obvious if we write an algorithm to sort a list of data, depending upon the data type we would need a different implementation of essentially the same thing. A light bulb went off in my head as soon as i read this cano. Things like template, which look really weird but behave in an even more bizarre way. Pdf c template metaprogramming download full pdf book. An introduction to template metaprogramming barney dellar software team lead toshiba medical visualisation systems. Dissecting template metaprogramming in the standard library. Metaprogramming is a programming technique in which computer programs have the ability to treat other programs as their data. This document was created by an unregistered chmmagic. A metaprogram is a program that generates or manipulates program code.
Recently, however, ive faced a problem that could not be solved by the means outlined in the article. Yes, its a weird name, but its a powerful and dangerous tool. This allows computations to be performed once at compile time rather than at each run time. Template metaprogramming scuola superiore santanna. Lets cover variable templates first, because theyre a lot like class templates. Metaprogramming or more specifically, template metaprogramming is the practice of using templates to create constants, functions, or data structures at compiletime. Metaprogramming in c is the art of creating new language constructs, typically using macros. It means that a program can be designed to read, generate, analyze or transform other programs, and even modify itself while running. Without realising it, a turingcomplete functional language was. The first portion of this book covers the basics of template metaprogramming fairly well, but what i wanted the rest of the book to cover were both advanced techniques and realworld applications. Functions in the template metaprogramming sense cannot be partially applied, so lets implement our own partial application facility.