February 10-15, Hagenberg, Austria
March 19-21, Madrid, Spain
April 1-4, Bristol, UK
June 16-21, Sofia, Bulgaria
By Adrien Hamelin | Oct 22, 2019 11:35 AM | Tags: experimental advanced
Very interesting.
Eliminating the Static Overhead of Ranges
by vector-of-bool
From the article:
C++20 is slated to receive Ranges, which is probably the most significant library update since the STL itself was introduced...
By Adrien Hamelin | Sep 25, 2019 10:02 AM | Tags: advanced
Only for special cases.
C++ Tricks: Fast RTTI and Dynamic Cast
by Samuel Kahn
From the article:
As introduced in the first post of these series, I will share the first piece of KCL: an implementation of RTTI and Dynamic Cast. The code can be found on GitHub.
If you don’t know what dynamic casting is, then I suggest you read some online resources before diving into this article...
By Adrien Hamelin | Sep 18, 2019 12:42 PM | Tags: advanced
Quick A: by making sure only one instance of each parent class is created.
Recently on SO:
How does virtual inheritance solve the “diamond” (multiple inheritance) ambiguity?
You want: (Achievable with virtual inheritance)
A / \ B C \ / DAnd not: (What happens without virtual inheritance)
A A | | B C \ / DVirtual inheritance means that there will be only 1 instance of the base A class not 2.
Your type D would have 2 vtable pointers (you can see them in the first diagram), one for B and one for C who virtually inherit A. D's object size is increased because it stores 2 pointers now; however there is only one A now.
So B::A and C::A are the same and so there can be no ambiguous calls from D. If you don't use virtual inheritance you have the second diagram above. And any call to a member of A then becomes ambiguous and you need to specify which path you want to take.
By Meeting C++ | Sep 9, 2019 12:48 AM | Tags: meetingcpp efficiency conference community basics advanced
Also available in this year: the programs for students and diversity & support for Meeting C++ 2019
Highlighting the Student and Support Tickets for Meeting C++ 2019
by Jens Weller
From the article:
With the Schedule for Meeting C++ 2019 being complete regarding submitted talks, I want to highlight, that there is an opportunity for folks to attend the conference with a free ticket!
By Adrien Hamelin | Aug 15, 2019 10:54 AM | Tags: advanced
Quick A: initialisers can access private members.
Recently on SO:
C++11 lambdas can access my private members. Why?
The initializer expression in the definition of a static data member is in the scope of its class...
By Adrien Hamelin | Aug 7, 2019 11:06 AM | Tags: advanced
Quick A: to help the compiler understand what the programmer wants.
Recently on SO:
Where and why do I have to put the “template” and “typename” keywords?
In order to parse a C++ program, the compiler needs to know whether certain names are types or not. The following example demonstrates that:
t * f;How should this be parsed? For many languages a compiler doesn't need to know the meaning of a name in order to parse and basically know what action a line of code does...
By Marco Arena | Jul 12, 2019 06:26 AM | Tags: c++20 c++17 advanced
A new interpretation of a classical problem:
Maximum Drawdown in next-gen C++
by Marco Arena
From the article:
In finance, the drawdown is the measure of the decline from a historical peak in some series of data (e.g. price of a stock on a certain period of time)...
By Adrien Hamelin | Jun 26, 2019 11:31 AM | Tags: advanced
Did you know about them?
The Power of Hidden Friends in C++
by Anthony Williams
From the article:
"Friendship" in C++ is commonly thought of as a means of allowing non-member functions and other classes to access the private data of a class. This might be done to allow symmetric conversions on non-member comparison operators, or allow a factory class exclusive access to the constructor of a class, or any number of things.
However, this is not the only use of friendship in C++, as there is an additional property to declaring a function or function template a friend: the friend function is now available to be found via Argument-Dependent Lookup (ADL). This is what makes operator overloading work with classes in different namespaces...
By Marco Arena | Jun 19, 2019 11:53 PM | Tags: community advanced
The Italian C++ Conference 2019 keynote:
"Allegro" Means Both Fast and Happy. Coincidence?
by Andrei Alexandrescu
About the video:
Sorting and searching. Two fundamental tasks in Computer Science, and definitely among the most studied. Efficient algorithms for sorting and searching are now taught in core undergraduate classes. Are they at their best, or is there more blood to squeeze from that stone? This talk will explore a few less known – but more allegro! – variants of classic algorithms.
By Marco Arena | Jun 5, 2019 06:43 AM | Tags: c++20 c++17 advanced
A new interpretation of a classical problem:
Kadane in next-gen C++
by Marco Arena
From the article:
We, programmers, get better results while thinking in patterns. We decompose complex problems in combinations of simpler patterns. However, many problems cannot be solved with known patterns. Here is where creativity kicks in...