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Simplifying templates and #ifdefs with if constexpr--Simon Brand

By Adrien Hamelin | Dec 12, 2016 02:55 PM | Tags: experimental basics

The new if constexpr will change a good part of our code for the better!

Simplifying templates and #ifdefs with if constexpr

by Simon Brand

From the article:

if constexpr is a C++17 feature which allows conditionally compiling code based on template parameters in a clear and minimal fashion. It is essentially an if statement where the branch is chosen at compile-time, and any not-taken branches are discarded without being instantiated...

C++ 17 Transformation...--phantom

By Adrien Hamelin | Dec 7, 2016 11:48 AM | Tags: experimental basics

The transformation is only a beginning towards catching up from C++98, but it does show why modern C++ features improve your code.

C++ 17 Transformation...

by phantom

From the article:

I'm basically really bad at working on my own projects, but with the recent release of Visual Studio 2017 RC and its improved C++17 support I figured it was time to crack on again...

To that end I've spent a bit of time today updating my own basic windowing library to use C++17 features. Some of the things have been simple transforms such as converting 'typedef' to 'using', others have been more OCD satisfying...

Basic dependent typing -- Krzysztof Ostrowski

By fj | Dec 5, 2016 04:09 AM | Tags: c++11 basics

Using fundamental types to do "simple things simple" fits very well in the most of cases.

Basic dependent typing

by Krzysztof Ostrowski

From the article:

If we assume that our application uses only a subset of values carried by given fundamental type, we are likely to get warning from the compiler. We shall take that warning seriously. How to inform type system about our assumptions? Example solutions follow.

Collaborative Online Compilers

By Meeting C++ | Nov 7, 2016 03:44 AM | Tags: experimental basics

I was doing some research on possible live formats...

Collaborative Online Compilers

by Jens Weller

From the article:

While doing some brainstorming for possible (youtube) live formats with C++ content, the thought of having a shared online IDE/Compiler came into my mind. Think of Google Docs but for C++...

The “unsigned” Conundrum--Tony “Bulldozer00” DaSilva

By Adrien Hamelin | Oct 18, 2016 01:42 PM | Tags: basics

Are you clear with unsigned?

The “unsigned” Conundrum

by Tony “Bulldozer00” DaSilva

From the article:

A few weeks ago, CppCon16 conference organizer Jon Kalb gave a great little lightning talk titled “unsigned: A Guideline For Better Code“. Right up front, he asked the audience what they thought this code would print out to the standard console:

Even though -1 is obviously less 1, the program prints out “a is not less than b“. WTF?

DLib 19.2 released

By Meeting C++ | Oct 11, 2016 05:57 AM | Tags: intermediate efficiency deep learning cuda basics advanced

Today a new version of DLib is available:

DLib 19.2 released

Release notes

by Davis King

From the article:

... So the obvious thing to do was to add an implementation of MMOD with the HOG feature extraction replaced with a convolutional neural network.  The new version of dlib, v19.2, contains just such a thing.  On this page you can see a short tutorial showing how to train a convolutional neural network using the MMOD loss function.  It uses dlib's new deep learning API to train the detector end-to-end on the very same 4 image dataset used in the HOG version of the example program.  Happily, and very much to the surprise of myself and my colleagues, it learns a working face detector from this tiny dataset.

Quick Q: Is the 'override' keyword just a check for a overriden virtual method?

By Adrien Hamelin | Oct 10, 2016 12:22 PM | Tags: c++11 basics

Quick A: Yes.

Recently on SO:

Is the 'override' keyword just a check for a overriden virtual method?

That's indeed the idea. The point is that you are explicit about what you mean, so that an otherwise silent error can be diagnosed:

struct Base
{
    virtual int foo() const;
};

struct Derived : Base
{
    virtual int foo()   // whoops!
    {
       // ...
    }
};

The above code compiles, but is not what you may have meant (note the missing const). If you said instead, virtual int foo() override, then you would get a compiler error that your function is not in fact overriding anything.