Download PDF by Davide Di Gennaro: Advanced Metaprogramming in Classic C++

By Davide Di Gennaro

ISBN-10: 1484210107

ISBN-13: 9781484210109

ISBN-10: 1484210115

ISBN-13: 9781484210116

Advanced Metaprogramming in vintage C++ goals to be either an creation and a connection with C++ template metaprogramming (TMP); TMP is gifted within the e-book as a collection of recommendations that might convey a brand new variety in C++ and make code incredibly transparent and effective. The publication offers with language features, layout styles, examples and functions (seen as case studies). particular emphasis is wear small reusable innovations that might enhance the standard of day-by-day paintings.

What makes the ebook unprecedented is the extent of knowing of the recommendations concerned imparted through the writer. this isn't only a rote assessment of metaprogramming. you'll actually comprehend tough subject matters like static assertions, find out how to write metafunctions, overload solution, lambda expressions, and so forth. greater than that, you are going to paintings via them with useful examples guided by means of the author's frank causes. This booklet calls for you to imagine and to benefit and to appreciate the language that you can software at the next level.

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These are elements of style. A fictional STL written in pure C would possibly have a global function clear, overloaded for all possible containers. clear() or clear(&cont) has the same net effect on cont, and might even generate the same binary file, but granted, it has a very different style. All these aspects are important during code reviews. If style agrees with the reader forma mentis, the code will look natural and clear, and maintenance will be easier. Some aspects of style are indeed less important, because they can be easily adjusted.

This could cause some name conflict with macros. It’s not always necessary to give a name to template parameters (as with function arguments), so when it’s feasible, you’d better remove the name entirely: // the following line is likely to give strange errors // since some compilers define BIGENDIAN as a macro! 3 for a detailed example. 33 Some authors reserve the keyword typename for this purpose. In other words, they declare template to mean that T is “any type” and template to suggest that T is indeed a class as opposed to a native type.

Size_t, being the result of sizeof and the argument of operator new, is large enough to store any amount of memory; ptrdiff_t represents the difference of two pointers. Since the length of an array of chars is end-begin, as a rule of thumb they will have the same size. Furthermore, in the flat C++ memory model, sizeof(size_t) also will be the size of pointers, and these integers will likely have the natural size in an architecture—say, 32 bits on a 32-bit processor and 64 bits on a 64-bit processor.

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Advanced Metaprogramming in Classic C++ by Davide Di Gennaro

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