Articles & Books

Pimpl vs Abstract Interface - a practical tutorial—Bartlomiej Filipek

In the article we describe how to limit compilation dependencies. Two methods are discussed: pimpl approach and via abstract interfaces

Pimpl vs Abstract Interface - a practical tutorial

by Bartlomiej Filipek

From the article:

In the post I covered the pimpl pattern. I discussed the basic structure, extensions, pros and cons and alternatives. Still, the post might sound a bit “theoretical”. Today I’d like to describe a practical usage of the pattern. Rather than inventing artificial names like MyClass and MyClassImpl you’ll see something more realistic: like FileCompressor or ICompressionMethod.

How a weak_ptr might prevent full memory cleanup of managed object—Bartlomiej Filipek

Tricky weak_ptr and shared_ptr interaction:<img alt="" data-cke-saved-src="https://2.bp.blogspot.com/-2XIQxeCUBFc/Wi2JGz_EcXI/AAAAAAAADNU/vEkN6ZtXR-Yon5YuZWBxk-6kjmHD1011ACLcBGAs/s1600/control_block.png" src="https://2.bp.blogspot.com/-2XIQxeCUBFc/Wi2JGz_EcXI/AAAAAAAADNU/vEkN6ZtXR-Yon5YuZWBxk-6kjmHD1011ACLcBGAs/s1600/control_block.png" right;"="" style="float: right; width: 230px; height: 199px;">

How a weak_ptr might prevent full memory cleanup of managed object

by Bartlomiej Filipek

From the article:

It appears that in some cases memory allocated for the object controlled by smart_ptr might not be released until all weak pointers are also ‘dead’.

C++ Comma Operator—Ivan Sanz

It needs to be used carefully, but has its uses.

C++ Comma Operator

by Ivan Sanz

From the article:

Comma operator has been with us for a long time. First seen in C spec and improved with custom overloads in C++, it quickly became one of those hidden things you shouldn’t use.
Most C/C++ books avoid speaking about goto the same way they do about comma operator. This is not fair, as both of them can be used properly on certain cases. Let’s speak about that...

C++ Status at the end of 2017

Bartek's non-official year report

C++ Status at the end of 2017

by Bartlomiej Filipek

From the article:

Four things that I’d like to emphasize for the year:

  • C++17 and the stable progress of the standardization
  • Transparency of the Committee and compiler vendors
  • Community is growing!
  • More tools!

The Pimpl Pattern - what you should know—Bartlomiej Filipek

A good sum up.

The Pimpl Pattern - what you should know

by Bartlomiej Filipek

From the article:

Have you ever used the pimpl idiom in your code? No matter what’s your answer read on smile

In this article I’d like to gather all the essential information regarding this dependency breaking technique. We’ll discuss the implementation (const issue, back pointer, fast impl), pros and cons, alternatives and also show examples where is it used. You’ll also see how modern C++ can change this pattern. Moreover, I hope you’ll help me and provide your examples...

Introduction to std::chrono—Rachel Crawford

How to measure time in C++?

Introduction to std::chrono

by Rachel Crawford

From the article:

How many times have you tried to call a function that alleges to return a time value only to realise you don’t know what units the value is in? Or that takes a time value as a parameter, but doesn’t specify whether the value is expected to be in milliseconds, seconds, or hours?

Chaining Comparisons: Seeking Information from the Audience—Barry Revzin

A nice example of committee members reaching out to the community for data/input on proposed changes that could have a breaking impact.

Chaining Comparisons: Seeking Information from the Audience

by Barry Revzin

From the article:

At the last standards committee meeting in Albuquerque, the spaceship operator was adopted into the working draft for what will eventually be C++20. I’m already pretty excited about that. But one of the initial “optional” parts of Herb Sutter’s original spaceship proposal (which was dropped early) was to support chaining comparisons...