Tag Archive for: format

Posts

More Details to Formatting User-Defined Types in C++20

February 26, 2024

Implementing a formatter for a user-defined type having more than one value in C++20 is challenging.…

Formatting User-Defined Types in C++20

February 12, 2024

Additionally, to the basic types and std::string, you can also format user-defined types in C++20. So…

The Formatting Library in C++20: The Format String (2)

February 5, 2024

In my last post, "The Formatting Library in C++20: The Format String", I presented a few of the format…

The Formatting Library in C++20: The Format String

January 29, 2024

I introduced "The Formatting Library in C++20" in my last post. Today, I will dive deeper into the format…

The Formatting Library in C++20

January 22, 2024

Today, I will start a series about the formatting library in C++20. The series is based on my C++20…

C++23: A Modularized Standard Library, std::print and std::println

August 21, 2023

The C++23 standard library has very impressive improvements. In this post, I will write about the modularized…

TimelineCpp20CoreLanguage

C++20: Extend std::format for User-Defined Types

October 11, 2020

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Peter Gottschling presented in his last post "std::format in C++20" the basics of the new formatting…

TimelineCpp20CoreLanguage

std::format in C++20

October 2, 2020

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Today, I'm happy to present Peter Gottschling's guest post to the new formatting library in C++20: std::format.…

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C++26 Core Language: Small ImprovementsNovember 4, 2024 - 8:34 am
There are more small improvements in the C++26 language, which you should know. static_assert extension First, here’s the syntax of static_assert in C++11: static_assert(compile time predicate, unevaluated string) With C++26, the string can be a user-defined type having the following properties: static_assert can now be used with a format string. Here’s a nice example from […]
Placeholders and Extended Character SetOctober 28, 2024 - 10:19 am
Placeholders are a nice way to highlight variables that are no longer needed. Additionally, the character set of C++26 will be extended. Placeholders Structured bindings are a C++17 feature that allows you to bind multiple variables to the elements of a structured object. The following program demonstrates using tuples and structured bindings to return and […]
Contracts in C++26October 21, 2024 - 9:54 am
Contracts allow you to specify preconditions, postconditions, and invariants for functions. Contracts should already be part of C++20 but were removed in the standard meeting in Cologne. Here is what Herb Sutter said about contracts on Sutter’s Mill: “contracts is the most impactful feature of C++20 so far, and arguably the most impactful feature we […]
Reflection in C++26: Determine the LayoutOctober 14, 2024 - 9:42 am
Thanks to reflection, you can determine the layout of types. My examples are based on the reflection proposal P2996R5. Class Layout The following program determines the class layout of a few members. // classLayout.cpp #include <experimental/meta> #include <iostream> #include <utility> #include <vector> #include <array> struct member_descriptor { std::size_t offset; std::size_t size; bool operator==(member_descriptor const&) const […]
Reflection in C++26: Metafunctions for Enums and ClassesOctober 7, 2024 - 1:53 pm
Today, I continue my journey through reflection in C++26 and play with enums and classes. The names of the metafunctions to access an Enum or a Class member are often identical. Access the Members of an Enum The following program is based on one by Daveed Vandevoorde. Daveed is one of the fathers of reflection, […]
Reflection in C++26: MetafunctionsSeptember 30, 2024 - 10:14 am
Reflection offers many metafunctions that run at compile time. The metafunctions are declared as consteval. consteval creates a so-called immediate function. Each invocation of an immediate function creates a compile-time constant. To say it more directly. A consteval (immediate) function is executed at compile-time. Read more about consteval and constinit in my previous post: Two […]