C++
Introduced in C++20, std::span is a light-weight abstraction that provides a convenient view into a collection of contiguous elements. Note that it is not enough for the elements to be logically contiguous, but they must be contiguous in memory too. Thus, span will work with C-style arrays, C++ vectors and arrays. It will obviously not work with […]
Title: Beautiful C++: 30 Core Guidelines for Writing Clean, Safe, and Fast Code Authors: J.Guy Davidson, Kate Gregory Publisher: Pearson Education Year: 2022 My earliest introduction to C++ guidelines was through Scott Meyers’ excellent book Effective C++ that first appeared in 1992. After programming in C++ for around 3 years at that point, the book […]
![C++20 [[no_unique_address]] Attribute](http://i0.wp.com/www.rangakrish.com/wp-content/uploads/2022/06/code1.jpg?resize=675%2C240&ssl=1 "C++20 [[no_unique_address]] Attribute")
The [[no_unique_address]] attribute was introduced in C++20 to give a compiler the freedom to optimise memory allocation of a struct/class when it contains a subobject that does not have any members. The other requirement is that the subobject should not be a static member of the enclosing struct/class. Let us start with the basics first. […]
When you program in Rust, especially in a non-trivial project, there is a good chance that you will need to call “external” functions (usually, C/C++) that are available in a DLL (we are talking about the Windows platform here). It could be because you wish to re-use some code that you have earlier written in […]
Traits in Rust are an amazing feature and contribute significantly to the expressive power of the language. For someone coming to Rust with a C++ background (like me), Traits appear to be quite similar to Abstract Classes in C++. Although they are similar, Traits have certain characteristics that set them apart. In this article, I […]
Concepts, introduced in C++20, are predicates that act as contraints on template parameters. As you would expect, the nice thing is that the constraint checking happens as part of template instantiation at compile time and not at run time! Since templates can have type as well as non-type parameters, Concepts can be applied to both […]
The Ring Programming Language, designed by Mahmoud Fayed, has been around since 2016. I came to know of it quite accidentally two weeks ago when I received a promotional email from Apress about their book “Beginning Ring Programming” by Mansour Ayouni, published in 2020. I immediately did a google search about the language and finding […]
Visual Prolog has its roots in Turbo Prolog, which was popularized by Borland in the mid 1980s. It is developed and supported by PDC A/S, Denmark. So how is Visual Prolog different from other Prolog implementations out there, for example, SWI-Prolog or Sicstus Prolog? Here are the key differences: 1) It is not an ISO Prolog […]
![C++20 [[nodiscard]] Attribute](http://i0.wp.com/www.rangakrish.com/wp-content/uploads/2021/01/Example1-src.jpg?resize=675%2C240&ssl=1 "C++20 [[nodiscard]] Attribute")
[[nodiscard]] attribute “encourages” the compiler to issue a warning when the return value from a function is ignored. It was introduced in C++ 17 and enhanced in C++ 20 to include a string literal that can be used as an explanation of the warning. Let us look at different cases one by one. Case-1: An enumeration […]
In our last post, we learnt about the type trait std::is_trivial<T>. Today, let us go through another type trait that is quite similar. The expression is_standard_layout<T>::value returns true if the layout of objects of type T is compiler independent, and hence is of standard format. Else, it returns false. This is important if we create objects […]
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