The output of these templates include compiletime constants, data structures, and complete functions. I initially approached this book with a bit of caution, as i had found other popular books i read previously. A metaprogram is a program that generates or manipulates program code. Introduction to metaprogramming in nim 20160606 nim programming introduction to the introduction metaintroduction wikipedia gives us a nice description of metaprogramming metaprogramming is the writing of computer programs with the ability to treat programs as their data. Everyday low prices and free delivery on eligible orders. Contribute to akimboykometaprogramming development by creating an account on github. Those that are too broken to use effectively for template metaprogramming. However, it will be used to generate complete functions. You can call this at compile time with something like adder result, which will be expanded at compile time and act exactly like a literal 3 in your program branching. It seems to me there is more than enough material and demand. Template metaprogramming map metainformation metafunctions membre traits traits classes traits templates lists and trees as nested templates computing numbers fibonacci control structures computing types if,switch, while,do,for computing code ewhile,edo, efor expression templates 15. The complete guide since it is also the definitive reference for templates in general.
Template metaprogramming is in fact turingcomplete, meaning that any computation expressible by a computer program can be computed, in some form, by a template metaprogram. Dissecting template metaprogramming in the standard library. Template metaprogramming is both a curiosity and a powerful optimisation method. This is a function that adds its two parameters and stores the result in the result enum member.
In theory, any computable problem can be solved at compile time without ever executing compiled code. The if template was the rst control structure in a generic form 3 and the remaining control structures were published in 4. This book explains what metaprogramming is and how it is best used. Concepts, tools, and techniques from boost and beyond pdf, epub, docx and torrent then this site is not for you. This post starts a series of articles following the contrived and tortuous path down insanity lane. The book deals with language aspects, design patterns, examples and applications seen as case studies. This article describes the workings of tmpp, a technique to easily write compiletime evaluated functions. 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. Of course, a type cannot be modified, so it has to be right the first time. Net is designed to help readers understand the basic concepts, advantages and potential pitfalls of metaprogramming. There have been some articles dealing with template metaprogramming before over here. Its strange, exciting and sometimes confusing all at once. More than 40 million people use github to discover, fork, and contribute to over 100 million projects.
A conditional branch can be constructed by writing two alternative specialisations of a template class. The use of templates can be thought of as compiletime polymorphism. Net is a practical introduction to the use of metaprogramming to improve the performance and maintainability of your code. The rst article on template metaprogramming 7 was published in 1995. The word in the title refers to runtime metaprogramming, as opposed to compile time metaprogramming. Everything you need to know about finance and investing in under an hour big think duration. This book avoids abstract theory and instead teaches you solid practices youll find useful immediately.
First, we need to start with a little clarification. The book metaprogramming gpus with sh actually doesnt have anything to do with template metaprogramming. Things like template, which look really weird but behave in an even more bizarre way. Trait classes are a familiar example of a simple form of template metaprogramming. If you create the type sqr, the constant sqr ret is set to 100. It introduces core concepts in clear, easytofollow language and then it takes you on a deep dive into the tools and techniques youll use to implement them in your. It introduces core concepts like code generation and application composition in clear, easytofollow language, and then it takes you on a deep dive. Introduction to metaprogramming in nim hookrace blog. I was motivated to write this after i read eric nieblers thoughtprovoking tiny metaprogramming library article. With template metaprogramming, you manipulate types, not objects.
Daixtroselib takes the task of delaying the evaluation and building the expressions, such that users only have to provide the appropriate. With variadic templates, parameter packs and template aliases. This book mixes a bit of metaprogramming with other template techniques. Youll explore plenty of realworld examples that reinforce key concepts. 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. Copyright c 20, decorators with args 47 from functools import wraps def debugprefix. Even while its fairly obvious that the executable will print something, its still great. Or is it just an idea book for an obfuscated c contestant. With the help of this library the expressiontemplate technique now is available for everyone. Daixtroselib is a ceeplusplus header library that retakes ideas developed by toddveldhuizen and geoffreyfurnish. Template metaprogramming is generally not used in practical programs, it.