Dependent Names

by Rainer Grimm

A dependent name is essentially a name that depends on a template parameter. A dependent name can be a type, a non-type, or a template parameter. To express that a dependent name stands for a type or a template, you have to use the keywords typename or template...

Design Patterns VS Design Principles: Iterator, Mediator and Memento

by Jonathan Boccara

In our objective to understand how the GoF design patterns relate to the GRASP design principles, we’re going to analyse 3 more Behavioural patterns today: Iterator, Mediator and Memento...

More about Variadic Templates ...

by Rainer Grimm

There is a lot of power in the strange-looking three dots that are heavily used in the Standard Template Library. Today, I visualize the expansion of the three dots and show a few use cases...

Stricter Expression Evaluation Order in C++17

by Bartlomiej Filipek

C++ has many dark corners and many caveats that can cause you to scratch your head in confusion. One of the issues we had until C++17 was the evaluation order of expressions. In this blog post, I’ll show you the new rules that we got in C++17 that made this complicated term much simpler and practical.

Here are the main points for today:

• What’s the case with make_unique vs unique_ptr<T>(new T) in a function call.
• What are the new rules for C++17?
• Are all bugs fixed and now well defined?

Let’s go.

Full Specialization of Function Templates

by Rainer Grimm

As you may know from my previous post Template Specialization, function template can only be full but not partial specialized. To make my long story short: Don't specialize function templates. Just use function overloading...

All rotations of a string with ranges

by Marco Arena

A common programming puzzle consists in printing all rotations of a string. For example, all rotations of abc are:

abc
bca
cab

...

Template Specialization - More Details About Class Templates

by Rainer Grimm

After I presented in my last post Template Specialization the basics about template specialization, I dig today deeper. I want to present the partial and full specialization of a class template as a compile-time if...

Template Specialization

by Rainer Grimm

Templates define the behavior of families of classes or functions. Often it is required that special types or non-types may be treated special. To support this use case, you can specialize templates.

Template Argument Deduction of Class Templates

by Rainer Grimm

In my last post Template Arguments, I wrote about function template type deduction (C++98) and auto type deduction (C++11). Today I wear more modern hats. I start with automatic type deduction of non-type template parameters and class templates (C++17) and finish with automatic type deduction of concepts (C++20).

Reversing words of a string with ranges

by Marco Arena

In this post I share the story of a “C++ aha-moment”, hence I use the hashtag #thatsarotate (resumed last Saturday at the Italian C++ Conference 2021 to honor our keynote speaker Sean Parent). Why not sharing your own stories of “C++ aha-moments” adding the same hashtag to your tweets, posts, or whatever? It would be really appreciated...