Partial function application -- Rainer Grimm

By Blog Staff | Jan 13, 2023 10:59 AM | Tags: None

Are you a library person (std::function, std::bind, std::bind_front) or a language person (lambdas, auto, currying)? So many tools to get the job done...

Partial function application

by Rainer Grimm

From the article:

A few weeks ago, I had a discussion with a few of my readers. One reader said that I should write about Partial Function Applications. Another reader mentioned that C++ does not support function applications. This is wrong. C++ supports Partial Function Application. Consequently, I am writing today about std::function, std::bind, std::bind_front, lambdas, auto, and currying.

Let me start with a bit of theory...

Using perfect (and imperfect) forwarding to simplify C++ wrapper classes -- Raymond Chen

By Blog Staff | Jan 13, 2023 10:57 AM | Tags: None

Perfectly imperfect:

Using perfect (and imperfect) forwarding to simplify C++ wrapper classes

by Raymond Chen

From the article:

There may be cases where you have a C++ class that wants to wrap another C++ class that is contained as a member. ... It’s annoying that there’s so much boilerplate to do the method forwarding, and that we have to keep looking up the parameters and return types so that each forwarder has the correct signature. Fortunately, we can use perfect forwarding to write most of them for us: ...

I'll Build Myself -- Phil Nash

By Blog Staff | Jan 2, 2023 12:23 PM | Tags: None

A new instant classic for the new year, by the great Phil Nash of C++ on Sea...

An interview that went viral -- Rainer Grimm

By Blog Staff | Jan 1, 2023 11:32 AM | Tags: None

Sending us straight into the new year with cash, cars, and games:

An interview that went viral

by Rainer Grimm

From the article:

I gave the interview for the e-finance-blog "efinancialcareers". I essentially stated the following:

• C++ is heavily used in the finance industry, for game developers, and in the automotive industry.
• When you want to learn C++, start at least with C++11.
• C++ is often used to build infrastructure.
• C++ is too big to fall.

... In total, I got almost 2000 comments. Today, I want to present the main points about the final interview, because this is my motivation for writing articles, posts, and books, recording videos, and teaching and mentoring C++...

libstdc++ gets C++20 chrono

By Blog Staff | Dec 24, 2022 10:34 AM | Tags: None

Imagine Jonathan Wakely in a red suit with his helper elves, delivering presents:

libstdc++ gets C++20 <chrono>

As seen on Reddit:

It looks like Jonathan Wakely has just today contributed a huge amount of effort towards <chrono>.

He's added the time zones, leap seconds, all that good stuff.

He's even added GDB pretty printers for inevitable date time debugging!

And these features are supported in <format>, which libstdc++13 has, if you weren't already aware. He's also made many other various improvements. Lets give a round of applause to Jonathan Wakely!

Using modules in the big three compilers

By Blog Staff | Dec 24, 2022 10:21 AM | Tags: None

With detailed step by step instructions on how to make it work...

Using modules in the big three compilers: a small experiment

 From the article:

The goal of my experiment was to see how easy it is to write code that a) uses C++20 modules, b) can be compiled by GCC, Clang and MSVC without using conditional compilation, c) imports something from the standard library, d) exports at least one templated function, e) has a peculiarity that makes the module harder to find (in my case, the module is named b but the file that contains it is named a.cppm).

The experiment sort of succeeded...

Reddit: C++ Tokyo Meetup with JF Bastien, Jason Turner, Chris DiBella

By Blog Staff | Dec 24, 2022 10:18 AM | Tags: None

Far east (const?) panel, starting right off with modules:

C++ Tokyo Meetup with JF Bastien, Jason Turner, Chris DiBella

The Strategy Pattern -- Rainer Grimm

By Blog Staff | Dec 20, 2022 01:54 PM | Tags: None

A canonical example:

The Strategy Pattern

by Rainer Grimm

From the article:

Purpose: Defines a family of algorithms and encapsulates them in objects

Also known as: Policy

Use case:

• Different variations of an algorithm are needed
• The client does not need to know the algorithm
• The algorithm should be exchangeable at the run time of a program...

AMA with Inbal Levi - Meeting C++ 2022

By Blog Staff | Dec 19, 2022 02:10 PM | Tags: None

Hot off the video press:

The Template Method -- Rainer Grimm

By Blog Staff | Dec 19, 2022 01:53 PM | Tags: None

With or without actual templates:

The Template Method

by Rainer Grimm

From the article:

The key idea of the Template Method is easy to get. You define the skeleton of an algorithm that consists of a few typical steps. Implementation classes can only override the steps but cannot change the skeleton. The steps are often called hook methods...