CppCon 2014 Modern Template Metaprogramming: A Compendium, Part II--Walter E. Brown

By Adrien Hamelin | Jun 5, 2015 08:00 PM | Tags: intermediate experimental

Have you registered for CppCon 2015 in September? Don’t delay – Early Bird registration is open now.

While we wait for this year’s event, we’re featuring videos of some of the 100+ talks from CppCon 2014 for you to enjoy. Here is today’s feature:

Modern Template Metaprogramming: A Compendium, Part II

by Walter E. Brown

(watch on YouTube) (watch on Channel 9)

Summary of the talk:

Template metaprogramming has become an important part of a C++ programmer's toolkit. This talk will demonstrate state-of-the-art metaprogramming techniques, applying each to obtain representative implementations of selected standard library facilities.

Along the way, we will look at void_t, a recently-proposed, extremely simple new new type_traits candidate whose use has been described by one expert as "highly advanced (and elegant), and surprising even to experienced template metaprogrammers."

CppCon 2014 Modern Template Metaprogramming: A Compendium, Part I--Walter E. Brown

By Adrien Hamelin | Jun 3, 2015 08:00 PM | Tags: intermediate experimental

Have you registered for CppCon 2015 in September? Don’t delay – Early Bird registration is open now.

While we wait for this year’s event, we’re featuring videos of some of the 100+ talks from CppCon 2014 for you to enjoy. Here is today’s feature:

Modern Template Metaprogramming: A Compendium, Part I

by Walter E. Brown

(watch on YouTube) (watch on Channel 9)

Summary of the talk:

Template metaprogramming has become an important part of a C++ programmer's toolkit. This talk will demonstrate state-of-the-art metaprogramming techniques, applying each to obtain representative implementations of selected standard library facilities.

Along the way, we will look at void_t, a recently-proposed, extremely simple new new type_traits candidate whose use has been described by one expert as "highly advanced (and elegant), and surprising even to experienced template metaprogrammers."

CppCon 2014 Practical Functional Programming in C++--Bryce Adelstein-Lelbach

By Adrien Hamelin | Jun 1, 2015 08:09 AM | Tags: intermediate

Have you registered for CppCon 2015 in September? Don’t delay – Early Bird registration is open now.

While we wait for this year’s event, we’re featuring videos of some of the 100+ talks from CppCon 2014 for you to enjoy. Here is today’s feature:

Practical Functional Programming in C++

by Bryce Adelstein-Lelbach

(watch on YouTube) (watch on Channel 9)

Summary of the talk:

To the untrained eye, pure functional programming may appear to be out of place in our traditionally imperative C++ world. However, the functional paradigm has become increasing prominent in production C++ codes, especially when implementing asynchronous execution.

This talk is intended as a primer for attendees who are either unfamiliar with functional programming or have doubts its practical uses in modern C++.

Examples from different sectors of industry/academia will be presented throughout.

No prior functional programming knowledge will be needed. While this talk will cover some theory, coverage of non-C++ programming languages will be minimal. The focus of this talk will be the application of theories from FP to C++, not FP itself.

GoingNative 38: The future of C++[17] - Updates from Lenexa--Gabriel Ha

By Adrien Hamelin | Jun 1, 2015 08:06 AM | Tags: intermediate experimental

A nice recapitulative video of what C++17 could be:

GoingNative 38: The future of C++[17] - Updates from Lenexa

by Gabriel Ha

From the video:

A few weeks ago, the ISO C++ Committee met in Lenexa, Kansas to hash out the future of the C++ language, specifically for C++17. We're honored to speak to two (previously featured) Microsoft delegates to the committee -- Gabriel "Gaby" Dos Reis and Artur Laksberg -- who took the time to give us a very nice overview of the major things that went down at the meeting!

docopt.cpp: A C++11 Port--Jared Grubb

By Adrien Hamelin | Jun 1, 2015 08:02 AM | Tags: intermediate efficiency

A nice library to help you ship a program:

docopt.cpp: A C++11 Port

by Jared Grubb

From the article:

Isn't it awesome how getopt (and boost::program_options for you fancy folk!) generate help messages based on your code?! These timeless functions have been around for decades and have proven we don't need anything better, right?

Hell no! You know what's awesome? It's when the option parser is generated based on the beautiful help message that you write yourself! This way you don't need to write this stupid repeatable parser-code, and instead can write only the help message--the way you want it...

New C++ experimental feature: The tadpole operators--Raymond Chen

By Adrien Hamelin | May 28, 2015 02:23 PM | Tags: intermediate experimental

You should read about this amazing new feature:

New C++ experimental feature: The tadpole operators

by Raymond Chen

From the article:

How often have you had to write code like this:

x = (y + 1) % 10;
x = (y + 1) * (z - 1);
x = (wcslen(s) + 1) * sizeof(wchar_t);

Since the + and - operators have such low precedence, you end up having to parenthesize them a lot, which can lead to heavily nested code that is hard to read...

Once you have been thoroughly amazed, you should also read this article:

The tadpole operators explained

Cling Aims to Provide a High-performance C++ REPL--Sergio De Simone

By Adrien Hamelin | May 28, 2015 02:14 PM | Tags: intermediate efficiency

Read about a REPL allowing to test things rapidly in C++:

Cling Aims to Provide a High-performance C++ REPL

by Sergio De Simone

From the article:

Cling is an interactive C++ interpreter that is built on top of LLVM and Clang and promises to provide a leap in productivity by going beyond the usual code-compile-run-debug C++ workflow...

Other useful materials:

• A short introduction video (youtube link)
• An article about C++ and scripting

Boost Your Productivity with Modern C++ -- June 8-12 (German), June 22-26 (English)

By Blog Staff | May 27, 2015 08:07 PM | Tags: intermediate c++14 c++11

Early-bird registration ends on Friday:

Boost Your Productivity with Modern C++

Leipzig, Germany

June 8-12, 2015 (German)

June 22-26, 2015 (English)

From the announcement:

Do you develop your developers?

Only when the last programmer is gone to Silicon Valley, we will realize that the digital progress won’t wait for us.

Google, Facebook, Amazon are clear examples showing that the growth of the IT market is passing by Germany. Over here, the formation of IT experts is systematically neglected. The industry is held back by the shortage of skilled programmers. Though we cannot create new developers for you, we can lift YOUR developers to the next level.

Yet in times of Big Data and Industry 4.0 the popularity of C++ remains unaffected, especially for operating systems, compilers and embedded systems. The revolutionary improvements in C++11 and C++14 brought the language further into the center of attention. For C++17, we are expecting even more spectacular progress.

Our practical training is based on the exclusive material from our tutor’s yet unpublished book on this powerful language.

The training is not a dull walk through all features of C++ but an inspiration how they can be applied with maximal efficacy. The programming language offers a wide variety of possibilities to create your own abstractions -- up to building your own embedded domain-specific language. Thereby, C++ is the only programming language allowing for such powerful abstractions while gaining maximal performance. Good C++ programming decreases the risk of errors and increases the programs' robustness. In addition, your programs will be even clearer, easier, and more attractive to your co-workers -- thus, more readable and maintainable.

Interactive exercises with practical relevance combine theory with your everyday business. We offer an intensive training in small groups with up to 10 participants in German or English. It is designed for software developers who want to develop high quality programs characterized by intuitive interfaces and maximum performance. At the end of the training, a certificate for each participants will be issued.

Trainer: Dr. Peter Gottschling is the author of the Matrix Template Library 4, co-author of Boost Graph Library as well as various other libraries. He was Head of the German delegation to the ISO Committee for the standardization of C++ and is Vice Chairman of the DIN Committee for programming languages. He has taught C++ at the Technische Universität Dresden, Technische Universität Berlin and Indiana University. Today, he is the CEO of SimuNova while working on his book "Discovering Modern C++" that will be released later this year.

C++17 Fold Expressions--Baptiste Wicht

By Adrien Hamelin | May 27, 2015 01:24 PM | Tags: intermediate experimental

You should read that if you want to know more about this exciting future feature of C++:

C++17 Fold Expressions

by Baptiste Wicht

From the article:

C++11 introduced variadic template to the languages. This new feature allows to write template functions and classes taking an arbitrary number of template parameters. This a feature I really like and I already used it quite a lot in my different libraries. Here is a very simple example computing the sum of the parameters:

// Good with variadics
auto old_sum(){
    return 0;
}

template<typename T1, typename... T>
auto old_sum(T1 s, T... ts){
    return s + old_sum(ts...);;
} 

// Better with fold expressions
template<typename... T>
auto fold_sum_1(T... s){
    return (... + s);
}x

Mach7: Pattern Matching for C++

By Adrien Hamelin | May 27, 2015 01:18 PM | Tags: performance intermediate

Here is a new library to perform pattern matching:

Mach7: Pattern Matching for C++

by Yuriy Solodkyy, Gabriel Dos Reis and Bjarne Stroustrup

From the article:

Pattern matching is an abstraction mechanism that can greatly simplify source code. Commonly, pattern matching is built into a language to provide better syntax, faster code, correctness guarantees and improved diagnostics. Mach7 is a library solution to pattern matching in C++ that maintains many of these features. All the patterns in Mach7 are user-definable, can be stored in variables, passed among functions, and allow the use of open class hierarchies...

Example:

// Fibonacci numbers
int fib(int n)
{
    var<int> m;

    Match(n)
    {
      Case(1)     return 1;
      Case(2)     return 1;
      Case(2*m)   return sqr(fib(m+1)) - sqr(fib(m-1));
      Case(2*m+1) return sqr(fib(m+1)) + sqr(fib(m));
    }
    EndMatch
}