Quick Q: Accessing protected members in a derived class

By Adrien Hamelin | Jun 18, 2018 12:06 PM | Tags: intermediate

Quick A: Only your own type can be accessed.

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Accessing protected members in a derived class

You can only access protected members in instances of your type (or derived from your type).
You cannot access protected members of an instance of a parent or cousin type.

In your case, the Derived class can only access the b member of a Derived instance, not of a different Base instance.

Changing the constructor to take a Derived instance will also solve the problem.

ISO C++ Committee – Rapperswil 2018 trip report--Timur Doumler

By Adrien Hamelin | Jun 13, 2018 12:40 PM | Tags: community

MAny things happened!

ISO C++ Committee – Rapperswil 2018 trip report

by Timur Doumler

From the article:

From the 4th to the 9th of June 2018, Phil Nash and I attended the ISO C++ Committee meeting in beautiful Rapperswil, Switzerland, representing JetBrains. We are continuing our active involvement in developing and standardising C++ (please read the last trip report for details)...

Triple trip report from ACCU, C++ Russia and C++Now 2018 – Part 2--Jonathan Boccara

By Adrien Hamelin | Jun 13, 2018 12:39 PM | Tags: community

THe second part.

Triple trip report from ACCU, C++ Russia and C++Now 2018 – Part 2

by Jonathan Boccara

From the article:

This is my second part of the combined trip report for 3 conferences: ACCU, C++ Russia and C++Now, for their 2018 editions that I had the chance to attend...

Overload 145 is now available

By Adrien Hamelin | Jun 12, 2018 12:36 PM | Tags: community

ACCU’s Overload journal of June 2018 is out. It contains the following C++ related articles.

Overload 145 is now available

From the journal:

Automate all the things
Automation can speed things up. Frances Buontempo considers how it can make things worse. by Frances Buontempo

How to Write a Programming Language: Part 1, The Lexer
Writing a programming language might sound very difficult. Andy Balaam starts his series with a lexer. by Andy Balaam

Type-agnostic Tracing Using {fmt}
Tracing compound and custom types is a challenge. Mike Crowe demonstrates how {fmt} provides a safe alternative to printf. by Mike Crowe

A Short Overview of Object Oriented Software Design
Object oriented design has many principles. Stanislav Kozlovski demonstrates good design through a role playing game. by Stanislav Kozlovski

Modern C++ Features – std::optional--Arne Mertz

By Adrien Hamelin | Jun 12, 2018 12:31 PM | Tags: c++17 basics

Spreading the knowledge.

Modern C++ Features – std::optional

by Arne Mertz

From the article:

Sometimes we want to express the state of “nothing meaningful” instead of a value. This is the use case for C++17’s std::optional...

Triple trip report from ACCU, C++ Russia and C++Now 2018 – Part 1--Jonathan Boccara

By Adrien Hamelin | Jun 8, 2018 12:32 PM | Tags: community

Were you there?

Triple trip report from ACCU, C++ Russia and C++Now 2018 – Part 1

by Jonathan Boccara

From the article:

Going to conferences is a great experience, to learn about your domain and meet people that work in it. Going to conferences can give you tools to write better code.

I’ve had the chance to go to (and speak at) three conferences over a month:

• ACCU in Bristol, UK at the beginning of April,
• C++ Russia in Saint-Petersburg, Russia in mid April,
• C++Now in Aspen, US at the beginning of May.

I haven’t seen many people attending all three of them, so I figured I could make a combined trip report, to give you an idea of what they’re like. And more importantly what you would get by attending either one.

And a huge thanks to the company I work for, Murex, for sending me all over the world of C++!

C++17: std::string_view

By Adrien Hamelin | Jun 8, 2018 12:28 PM | Tags: c++17 basics

Simple and useful.

C++17: std::string_view

by Marc Gregoire

From the article:

If you have to write a function that accepts a string, what type of parameter will you use?

Everything You Need to Know About std::variant from C++17

By Adrien Hamelin | Jun 6, 2018 12:06 PM | Tags: c++17 advanced

Really everything!

Everything You Need to Know About std::variant from C++17

by Bartlomiej Filipek

From the article:

Around the time C++17 was being standardized I saw magical terms like “discriminated union”, “type-safe union” or “sum type” floating around. Later it appeared to mean the same type: “variant”...

C++17: Fallthrough in switch statements--Marc Gregoire

By Adrien Hamelin | Jun 6, 2018 11:43 AM | Tags: c++17 basics

Simple and useful.

C++17: Fallthrough in switch statements

by Marc Gregoire

From the article:

A C++ switch statement allows execution to fall through from one case to the next case when a break statement is missing...

C++ User Group Meetings in June

By Meeting C++ | Jun 5, 2018 08:12 AM | Tags: meetingcpp community

Lots of User Groups are meeting in June, Meeting C++ has posted an detailed overview:

C++ User Group Meetings in June 2018

by Jens Weller

From the article:

The monthly overview of upcoming C++ User Group meetings. Join a C++ User Group near you, or learn how to start your own!

There are 4 new C++ User Groups: Houston, Prague, Cluj, New York.