By Davide Di Gennaro
Complicated Metaprogramming in vintage C++ bargains an in depth inspect C++ template metaprogramming (TMP); TMP is gifted within the booklet as a collection of recommendations that would deliver a brand new kind in C++ and making it quite transparent and effective. The ebook bargains with language facets, layout styles, examples and purposes (seen as case studies). distinct emphasis is wear small reusable options that would enhance the standard of day-by-day work.
The ebook teaches metaprogramming utilizing vintage C++, that's, now not utilizing the 2 more moderen criteria. this can be performed to maximise compatibility and obviously illustrate the procedure, allowing the reader to understand tough fabric with out the burdens of compiler mistakes, and different pointless complexities and allowing a way more excessive remedy of the topic. In so doing, all next additions to the C++ language are totally suitable with the code during this ebook and clients conversant in them can leverage the techniiques brought in C++ XX to make the styles during this booklet much more robust. there's a bankruptcy even though that discusses concerns in regards to the more recent standards.
What makes the publication unprecedented is the extent of figuring out of the techniques concerned imparted through the writer. this isn't only a rote evaluation of metaprogramming. you are going to actually comprehend tough issues like static assertions, the way to write metafunctions, overload solution, lambda expressions, and so forth. greater than that, you'll paintings via them with sensible examples guided through the author's frank motives. This e-book calls for you to imagine and to benefit and to appreciate the language that you should software at a better level.
What you’ll learn
What templates and the small item toolkit are, and the way to exploit them
easy methods to do overload resolution
the way to do metaprogramming with interfaces, algorithms, functors and refactoring
the best way to paintings with code generators
what's opaque sort precept and the way to take advantage of it
tips on how to paintings with debugging templates and more
A bankruptcy dedicated to concerns surrounding C++0x and C++14
Who this publication is for
This booklet is for knowledgeable C++ programmers who are looking to study more.
Table of Contents
Part I
1. Templates
2. Small item Toolkit
Part II
3. Static Programming
4. Overload Resolution
5. Interfaces
6. Algorithms
7. Code Generators
8. Functors
9. Opaque kind Principle
Part III
10. Refactoring
11. Debugging Templates
12. C++0X
13. Appendix A: Exercises
14. Appendix B: Bibliography
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Additional resources for Advanced Metaprogramming in Classic C++ (3rd Edition)
Sample text
Call swap_with_ADL inside classes having a swap member function. std::swap grants the best implementation for swapping both native and std types. swap is used in algorithms with move semantics: void doSomething(X& result) { X temp; // perform some operation on temp, then... , more memory). 3. bool T::empty() const; void T::clear() The former function tests whether an object is empty; the latter makes it empty. If an object has a member function size(), then a call to empty() is expected to be no slower than size()==0.
The function base instead is used to return a copy of the wrapped object, when the wrapper is just a different interface. Since a smart pointer typically adds some complexity (for example, a reference count), the name base would not be as appropriate as get. On the other hand, std::reverse_iterator is an interface that swaps ++ and -- of an underlying iterator, so it has a base(). Some objects may want to check in advance if overwrite is feasible. size() then it might be able to perform a safe memcpy.
This argument actually shows that every result of sizeof can be stored in a ptrdiff_t. A generic size_t may not be stored in a ptrdiff_t, because sizeof is not necessarily surjective—there may be a size_t value that is larger than every possible sizeof. 40 For example, to create a copy of std::string takes time proportional to the length of the string itself, so this depends not only on the type, but also on the instance; alternatively, copying a double is a constant-time operation. Mathematically speaking, the notion of “constant time” is not well defined in C++; the issue is too complex for a footnote, but we’ll sketch the idea.