The reviews at r/cpp_review have begun!

By Meeting C++ | Aug 10, 2017 08:12 AM | Tags: performance intermediate efficiency community codereview c++14 c++11 basics

Participate in the first two reviews at r/cpp_review:

The reviews have begun

by Jens Weller

From the article

A few weeks ago I announced a C++ review community, which since then has grown to 250+ members on reddit. There has been great feedback and discussions since then, so that the idea is now ready to be tested.  With August, the first review period has started

2017-07 post-Toronto mailing available

By Blog Staff | Aug 8, 2017 09:49 AM | Tags: None

The full 2017-07 mailing of new standards papers is now available.

A Summary of the Metaclasses Proposal for C++

By Adrien Hamelin | Aug 7, 2017 03:39 PM | Tags: experimental community

A revolution!

A Summary of the Metaclasses Proposal for C++

by Jonathan Boccara

From the article:

A couple of weeks ago, Herb Sutter posted his proposal about metaclasses, triggering a wave of enthusiasm among the C++ community. And for good reason.

CppCon 2016: The Blaze High Performance Math Library--Klaus Iglberger

By Adrien Hamelin | Aug 7, 2017 03:24 PM | Tags: performance community

Have you registered for CppCon 2017 in September? Don’t delay – Registration is open now.

While we wait for this year’s event, we’re featuring videos of some of the 100+ talks from CppCon 2016 for you to enjoy. Here is today’s feature:

The Blaze High Performance Math Library

by Klaus Iglberger

(watch on YouTube) (watch on Channel 9)

Summary of the talk:

In this presentation we introduce the Blaze C++ math library, a hot contender for the linear algebra performance throne. Blaze is an open-source, high-performance library for dense and sparse arithmetic. It combines elegance and ease of use with HPC-grade performance, making it one of the most intuitive and at the same time fastest C++ math libraries available.

We demonstrate its basic linear algebra functionality by means of several BLAS level 1 to 3 operations and explain why Blaze outperforms even well established linear algebra libraries. Additionally, we present some advanced features that enable users to adapt Blaze to special circumstances: custom data structures, custom operations, and the customizable error reporting mechanism.

Making things do stuff – Part 9--Glennan Carnie

By Adrien Hamelin | Aug 4, 2017 01:22 PM | Tags: None

The end of the series.

Making things do stuff – Part 9

by Glennan Carnie

From the article:

As a final instalment in this series on hardware manipulation I thought I’d revisit read-only and write-only register types.

C++17: Nested Namespaces--Marc Gregoire

By Adrien Hamelin | Aug 2, 2017 01:55 PM | Tags: c++17 basics

Another new feature.

C++17: Nested Namespaces

by Marc Gregoire

From the article:

The second post in this series of C++17 features highlights a tiny but very useful new feature called nested namespaces.

(Not Really So) New Niche for C++: Browser!? -- No Bugs Hare

By Felix Petriconi | Aug 1, 2017 11:33 PM | Tags: intermediate

In this article "No Bugs" Hare outlines the possibility to run C++ code in the major four web browsers.

(Not Really So) New Niche for C++: Browser!?

by "No Bugs" Hare

From the article:

For quite a long while, C++ had been losing popularity; for example, as reported in [Widman16], in 2016 it got 7% less of the listings on Dice.com compared with a year earlier; and according to [TIOBE17], from the C++ Golden Age in 2004 till 2017, the C++ share fell from ~17% to a measly 6%.

As all of us (as in, ‘hardcore C++ fans’) know , this has nothing to do with the deficiencies of C++; rather it is related to an observation that the time of downloadable clients (which was one of the main C++ strongholds) has changed into the time of browser-based clients – and all the attempts to get C++ onto browsers were sooo ugly (ActiveX, anyone?) that this didn’t really leave a chance to use C++ there.

Well, it seems that this tendency is already in the process of being reverted:

C++ can already run on all four major browsers – and moreover, it has several all-important advantages over JavaScript, too.
And this – not too surprisingly – is what this article is all about.

C++17: Structured Bindings--Marc Gregoire

By Adrien Hamelin | Jul 31, 2017 12:32 PM | Tags: c++17 basics

It is coming!

C++17: Structured Bindings

by Marc Gregoire

From the article:

This is a first post in a series of short articles on new C++17 features. These articles will not contain all little details of the new features being presented, but they give you an idea about what new functionality has been added to C++17.

C++17 in details: Code Simplification--Bartlomiej Filipek

By Adrien Hamelin | Jul 26, 2017 01:40 PM | Tags: c++17

The series continue.

C++17 in details: Code Simplification

by Bartlomiej Filipek

From the article:

You might say that most of the new language features (not to mention The Standard Library improvements) are there to write simpler/cleaner code. The “C++17 in details” series reviews most of the bigger things, still for today, I tried to pick a few features that out of the box make your code more compact.

• Structured bindings/Decomposition declarations
• Init-statement for if/switch
• Inline variables
• constexpr if (again!)
• a few other mentions

Quick Q: How to require an exact function signature in the detection idiom?

By Adrien Hamelin | Jul 26, 2017 01:23 PM | Tags: c++17 advanced

Quick A: Use is_detected

Recently on SO:

How to require an exact function signature in the detection idiom?

With C++17 is_detected, you may do

template <typename T, typename Ret, typename Index>
using subscript_t = std::integral_constant<Ret (T::*) (Index), & T::operator[]>;

template <typename T, typename Ret, typename Index>
using has_subscript = is_detected<subscript_t, T, Ret, Index>;

static_assert(has_subscript<std::vector<int>, int&, std::size_t>::value, "!");
static_assert(!has_subscript<std::vector<int>, int&, int>::value, "!");