Welcome to new C++ Links - most important and useful articles, podcasts and videos that happen between 15th and 21st of September.
Today you will find a link to post about “same but different” objects in C++, a video showing what code compiler generates when you write a lambda, article about why you should always capture exception by const reference and many others.
As usually, C++ needs good books and up-to-date learning resources. In this review, I’d like to present a book that should significantly enhance your knowledge of Modern C++, including C++17.
Let’s see what’s inside.
Welcome to new C++ Links - most important and useful articles, podcasts and videos that happened between 8th and 14th of September. Today you will find a link to a post about the C++ quality of life features, a video with an explanation of the difference between const and constexpr, an article that describes some of SFINAE problems and many others.
std::visit is a powerful utility that allows you to call a function over a currently active type in std::variant. It does some magic to select the proper overload, and what’s more, it can support many variants at once.
Let’s have a look at a few examples of how to use this functionality.
I'd like to make an experiment on the blog and introduce a new simple series. Each Friday you'll see a summary with valuable links and resources from the C++ World. The links and annotations are coming from a guest author - Wojciech Razik - one of the co-author of cpp-polska.pl.
Let's have a quick look at the best links for this week!
I’m happy to announce that just a few days ago I updated the book! “C++17 In Detail” grew by 7 pages (up to 219), includes a few new examples, new feature descriptions and lots of “bug fixes”.
See what’s inside.
Searchers from C++17 are a new way to perform efficient pattern lookups. The new standard offers three searchers: default_searcher , boyer_moore_searcher and boyer_moore_horspool_searcher. The last two implements algorithms that require some additional preprocessing for the input pattern. Is there a chance to separate preprocessing time from the search time?
With C++17 you can now use more sophisticated algorithms for pattern searches! Now, you’ll have more control and a promising performance boost for many use cases.
See what the options are.
I’m happy to present my first ebook on C++!
Here’s the short story and the description of what you can find inside.
How do you initialise a string member in the constructor? By using const string&, string value and move, string_view or maybe something else?
Let’s have a look at possible options.
Thank you for all the comments about the string_view performance! Last week I got a lot of feedback on how to improve the initial string split code.
Have a look at how can we update the code and get some better performance.
How much is std::string_view faster than standard std::string operations?
Have a look at a few examples where I compare std::string_view against std::string.
When you read articles or reference pages for std::any, std::optional or std::variant you might notice a few helper types called in_place_* available in constructors.
Why do we need such syntax? Is this more efficient than “standard” construction?
Writing articles about modern C++ features is a lot of fun, but what’s even better is to see how you use those new things in real world.
Today I’m happy to present a guest post article from JFT who was so kind to describe his project where he uses several C++17 features.
He shared the process of building a menu that is based on std::any, std::variant and std::optional.
Have a look!