C++
std::tuple is a widely used abstraction in C++ and has been around since C++11. It is a generalization of std::pair. std::tie is convenient when we want to create a tuple of lvalue references to existing variables. It is a function template commonly used to unpack a tuple into individual objects. In the above example, we […]
This is the third and the last article in the series “Why Learn Language-XYZ?”. I talked about Prolog and Lisp earlier. The present article is on C++. Once you have gained reasonable proficiency with Prolog and Lisp, you are ready to learn C++! In my view, C++ is a complex language and requires sufficient maturity […]
Title: Embracing Modern C++ Safely Authors: John Laos, Vittorio Romeo, Rostislav Khlebnikov, and Alisdair Meredith Publisher: Pearson Education, Inc. Year: 2022 C++ is a complex language. Fortunately, we have several good books (and other online material) for programmers at various levels. A few weeks ago, I had reviewed and recommended “Beautiful C++”, book suitable for […]
One of the common questions when starting to study the container abstractions in C++20 is “Should I use std::array or std::vector?”. The correct answer is “use what is best suited for the current situation”. That is not good enough, obviously. In this short article, I will try to answer this question based on the intrinsic nature […]
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 […]
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