Archive for category: Templates

AutomaticReturnType

Automatic Return Type (C++98)

October 15, 2021

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Depending on the used C++ standard, there are different ways to return the correct return type of a function…

templates

Dependent Names

October 7, 2021

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A dependent name is essentially a name that depends on a template parameter. A dependent name can be…

templates

The Special Friendship of Templates

September 29, 2021

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A friend has unrestricted access to the members of a class. Consequently, friendship should be given…

templates

Visiting a std::variant with the Overload Pattern

September 23, 2021

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Typically, you use the overload pattern for a std::variant. std::variant is a type-safe union. A std::variant…

templates

Smart Tricks with Parameter Packs and Fold Expressions

September 16, 2021

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To complete my post about variadic templates and fold expressions, I present in this post smart tricks…

templates

From Variadic Templates to Fold Expressions

September 8, 2021

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In my last two posts, "Variadic Templates or the Power of Three Dots" and "More about Variadic Templates",…

templates

More about Variadic Templates …

August 13, 2021

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There is a lot of power in the strange-looking three dots that are heavily used in the Standard Template…

templates

Variadic Templates or the Power of Three Dots

August 6, 2021

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A variadic template is a template that can have an arbitrary number of template parameters. This feature…

templatesInstantiation

Template Instantiation

July 29, 2021

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Template instantiation is creating a concrete function or a concrete class out of a function or class…

TemplateSpecialization

Full Specialization of Function Templates

July 9, 2021

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As you may know from my previous post, Template Specialization, a function template can only be full…

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C++20: Query Calendar Dates and Ordinal DatesApril 22, 2024 - 9:53 am
The extended chrono library makes it relatively easy to ask for the time duration between calendar dates. This post is the sixth in my detailed journey through the chrono extension in C++20: Query Calendar Dates Without further ado, the following program queryCalendarDates.cpp queries a few calendar dates. // queryCalendarDates.cpp #include <chrono> #include <iostream> int main() […]
C++20: Displaying and Checking Calendar DatesApril 15, 2024 - 9:20 am
I created calendar dates in my last post, “C++20: Creating Calendar Dates,” and I will display and check them today. This post is the fifth in my detailed journey through the chrono extension in C++20: Displaying Calendar Dates Thanks to std::chrono::local_days or std::chrono::sys_days, you can convert calendar dates to a local or a system std::chrono::time_point. […]
C++20: Creating Calendar DatesApril 8, 2024 - 10:51 am
In this post, I will dive deeper into calendar dates and create them. If this post is too overwhelming for you, read my previous ones: C++20 supports constants and literals to make using calendar-date types more convenient. Constants and Literals for Calendar Types Let me start with the constants for std::chrono::weekday, and std::chrono::month. std::chrono::Monday std::chrono::Thuesday […]
C++20: Time of DayMarch 25, 2024 - 10:08 am
This new data type std::chrono::hh_mm_ss in C++20 stands for the time of day. Time of Day std::chrono::hh_mm_ss is the duration since midnight split into hours, minutes, seconds, and fractional seconds. This type is typically used as a formatting tool. First, the following table gives you a concise overview of std::chrono::hh_mm_ss instance tOfDay. Depending on the […]
C++20: Basic Chrono Terminology with Time Duration and Time PointMarch 18, 2024 - 10:34 am
Today, I continue my journey through the basic types with time durations and time points. Time Durations C++14 introduced helper types such as std::chrono::seconds for time durations and corresponding time literals such as 5s. C++20 added new helper types. The following table shows all for completeness. Often the time duration std::chrono::days and the calendar date […]
My Next Mentoring Program: “Concurrency with Modern C++” startsMarch 11, 2024 - 11:24 am
My next mentoring program, “Concurrency with Modern C++”, starts on the 15th of March. Registration is open.