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Smaller C++20 Features - My Presentation

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In September and October, I had the pleasure of running two meetings about C++20 features for my local Cracow C++ User Group! Here are the slides and additional comments from the presentation. The Talk   Initially I did one presentation using my article on smaller C++ 20 features (20 Smaller yet Handy C++20 Features - C++ Stories).

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All Major C++17 Features You Should Know

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The ISO Committee accepted and published the C++17 Standard in December 2017. In this mega-long article, I’ve built (with your help!) a list of all major features of the new standard. Please have a look and see what we get! Language Features New auto rules for direct-list-initialization static_assert with no message typename in a template template parameter Removing trigraphs Nested namespace definition Attributes for namespaces and enumerators u8 character literals Allow constant evaluation for all non-type template arguments Fold Expressions Unary fold expressions and empty parameter packs Remove Deprecated Use of the register Keyword Remove Deprecated operator++(bool) Removing Deprecated Exception Specifications from C++17 Make exception specifications part of the type system Aggregate initialization of classes with base classes Lambda capture of *this Using attribute namespaces without repetition Dynamic memory allocation for over-aligned data __has_include in preprocessor conditionals Template argument deduction for class templates Non-type template parameters with auto type Guaranteed copy elision New specification for inheriting constructors (DR1941 et al) Direct-list-initialization of enumerations Stricter expression evaluation order constexpr lambda expressions Different begin and end types in range-based for [[fallthrough]] attribute [[nodiscard]] attribute [[maybe_unused]] attribute Ignore unknown attributes Pack expansions in using-declarations Structured Binding Declarations Hexadecimal floating-point literals init-statements for if and switch Inline variables DR: Matching of template template-arguments excludes compatible templates std::uncaught_exceptions() constexpr if-statements SFINAE Tag dispatching if constexpr Library Features Merged: The Library Fundamentals 1 TS (most parts) Removal of some deprecated types and functions, including std::auto_ptr, std::random_shuffle, and old function adaptors Merged: The Parallelism TS, a.

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20+ Ways to Init a String, Looking for Sanity

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C++ is famous… or infamous for its complex initialization syntax. In this article, I’ll show you around 20 ways to initialize simple std::string variables. Can we somehow make it easier to understand? Default values   Have a look: void foo() { std::string str0; std::string str1 {}; } We have two local variables (with automatic storage duration), str0 is default initialized, while str1 is value initialized.

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5 Curious C++ Lambda Examples: Recursion, constexpr, Containers and More

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In this blog post I’ll show you a couple of interesting examples with lambda expressions. Do you know how to write a recursive lambda? Store them in a container? Or invoke at compile time? See in the article. Updated in August 2022: Added C++23 improvements. 1. Recursive Lambda with std::function   Writing a recursive function is relatively straightforward: inside a function definition, you can call the same function by its name.

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C++20 Ranges Algorithms - sorting, sets, other and C++23 updates

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This article is the third and the last one in the mini-series about ranges algorithms. We’ll look at some sorting, searching, and remaining algorithms. We’ll also have a glimpse of cool C++23 improvements in this area. Let’s go. Before we start   Key observations for std::ranges algorithms: Ranges algorithms are defined in the <algorithm> header, while the ranges infrastructure and core types are defined in the <ranges> header.

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