By Adrien Hamelin | Jun 21, 2021 11:54 AM | Tags: basics
The series continue.
Template Arguments
by Rainer Grimm
From the article:
It is quite interesting how the compiler deduces the types for the template arguments. To make it short, you get most of the time the type you expect. The rules do not only apply to function templates (C++98) but also to auto (C++11), to class templates (C++17), and concepts (C++20)...
By Adrien Hamelin | Jun 21, 2021 11:49 AM | Tags: c++11
Did you ever want to do that?
How to Define A Variadic Number of Arguments of the Same Type – Part 5
by Tobias Loew
From the article:
Defining a variadic pack of arguments of the same type turns out to be a deep topic as this is the fifth post and seventh technique we (I or guest writer Tobias in Part 4) discover on this topic...
By Adrien Hamelin | Jun 15, 2021 09:47 AM | Tags: intermediate
The series continue.
Alias Templates and Template Parameters
by Rainer Grimm
From the article:
Today, I write about two topics: alias templates and template parameters. Alias templates are a way to give a name to a family of types. Template parameters can be types, non-types, and templates themselves.
By Adrien Hamelin | Jun 9, 2021 12:12 PM | Tags: None
How do you do it?
7 Top Tips for Debugging C++
by Greg Law
From the article:
Brian Kernighan famously said, “Everyone knows that debugging is twice as hard as writing a program in the first place. So if you’re as clever as you can be when you write it, how will you ever debug it?”. For me, this doesn’t just mean “keep it simple.” It also means debugging is central to programming – you cannot be a great programmer without being great at debugging. Hopefully, my favorite C++ debugging tips will help you be as clever and productive debugging your code as you are writing it in the first place...
By Adrien Hamelin | Jun 9, 2021 12:06 PM | Tags: c++20
Are you using concepts?
Decent concepts
by Andrzej Krzemieński
From the article:
Last year I published two posts on writing concepts:
- Concept Archetypes,
- Semantic requirements in concepts.
Having had some time to reflect upon these posts, I now realize that the model presented in them is not complete. In this post I want to give a more coherent view of concepts...
By Adrien Hamelin | Jun 9, 2021 11:59 AM | Tags: community
Are you in such an environement?
A list of bad practices commonly seen in industrial projects
by Thomas Lourseyre
From the article:
If you ever worked in a company-size software project (with numerous developers), there is a good chance that the codebase was, at least, pretty messy.
In these days, most industrial C++ developers are not experts. You will often work with developers with a Java or Python background, people who just learnt C++ at school and don’t really care that much about the language and old developers who code in “C with classes” instead of C++.
Having worked on a few industrial projects myself, I realized there are some recurring patterns and bad practices. If you happen to teach your coworkers to avoid these bad practices, you will all take a huge step toward a beautiful codebase and it will be beneficial to you, your coworkers and your project.
Here is a non-exhaustive list of these common bad practices...
By Adrien Hamelin | Jun 7, 2021 12:26 PM | Tags: intermediate
Back to the basics.
Surprise Included: Inheritance and Member Functions of Class Templates
by Rainer Grimm
From the article:
In my last post "Class Templates", I presented the basics about those. Today, I may surprise you with the inheritance of class templates and the instantiation of member functions of class templates...
By Adrien Hamelin | Jun 7, 2021 12:23 PM | Tags: None
Get some ideas of the possibilities.
How to Filter Elements - the Talk and Optimizations
by Bartlomiej Filipek
From the article:
Two weeks ago, 20th May, I had a pleasure to talk about filtering elements on our Cracow C++ User Group online meeting.
Here are the slides and additional comments from the presentation...
By Adrien Hamelin | Jun 7, 2021 12:14 PM | Tags: intermediate
Quick A: the better match is picked, and an error generated if there none.
Recently on SO:
Overload resolution between object, rvalue reference, const reference
As there is only one parameter, the rule is that one of the three viable parameter initializations of that parameter must be a better match than both the other two. When two initializations are compared, either one is better than the other, or neither is better (they are indistinguishable).
Without special rules about direct reference binding, all three initializations mentioned would be indistinguishable (in all three comparisons)...
By Blog Staff | Jun 3, 2021 10:55 AM | Tags: None
Solution just posted:
GotW #102 Solution: Assertions and "UB"
by Herb Sutter
From the article:
Now that we have considered assertions, postconditions, and preconditions in GotWs #97-101, let’s pause and reflect: To what extent does a failed contract imply "UB"... either the Hidden Dragon of Undefined Behavior, or the Crouching Tiger of Unspecified Behavior?