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CppCast Episode 115: Meeting C++ and cpp_review with Jens Weller

By robwirving | Aug 25, 2017 07:35 AM | Tags: None

Episode 115 of CppCast the only podcast for C++ developers by C++ developers. In this episode Rob and Jason are joined by Jens Weller to talk about the upcoming Meeting C++ conference, the /r/cpp_review community and more.

CppCast Episode 115: Meeting C++ and cpp_review with Jens Weller

by Rob Irving and Jason Turner

About the interviewee:

Jens Weller is the organizer and founder of Meeting C++. Doing C++ since 1998, he is an active member of the C++ Community. From being a moderator at c-plusplus.de and organizer of his own C++ User Group since 2011 in Düsseldorf, his roots are in the C++ Community. Today his main work is running the Meeting C++ Platform (conference, website, social media and recruiting). His main role has become being a C++ evangelist, as this he speaks and travels to other conferences and user groups around the world.

C++17 in detail: Parallel Algorithms -- Bartlomiej Filipek

By bfilipek | Aug 23, 2017 10:23 AM | Tags: performance c++17

Let’s see how C++17 can make writing parallel code a bit easier.

C++17 in details: Parallel Algorithms

by Bartlomiej Filipek

From the article:

With C++17 we get a lot of algorithms that can be executed in a parallel/vectorized way. That’s amazing, as it’s a solid abstraction layer. With this making, apps is much easier. A similar thing could be achieved possibly with C++11/14 or third-party APIs, but now it’s all in the standard.

CppCon 2016: Safe Numerics Library--Robert Ramey

By Adrien Hamelin | Aug 23, 2017 09:12 AM | Tags: community boost

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:

Safe Numerics Library

by Robert Ramey

(watch on YouTube) (watch on Channel 9)

Summary of the talk:

This presentation describes the necessity, utility and usage for a library of safe integer types. These types function in all respects the same way as built-in integers, but guarantee that no integer expression will return an incorrect result. The library can be reviewed at the boost library incubator.

Overload 140 is now available

By Adrien Hamelin | Aug 21, 2017 12:10 PM | Tags: community

ACCU’s Overload journal of June 2017 is out. It contains the following C++ related articles.

Overload 140 is now available

From the journal:

Editorial: Gnomes and Misnomers.
What's in a name? Frances Buontempo decides some names are better than others.

The Path of the Programmer.
Charles Tolman provides a framework for personal development.

A Usable C++ Dialect that is Safe Against Memory Corruption.
Sergey Ignatchenko continues his investigation of allocators for (Re)Actors.

Metaclasses: Thoughts on Generative C++.
Herb Sutter shows how metaclasses could simplify C++ with minimal library extension.

A C++ Developer Sees Rustlang for the First Time.
Katarzyna Macias provides an introduction to Rust for a C++ developer.

Portable Console I/O via iostreams.
Alf Steinbach describes how his library fixes problems streaming non-ASCII characters in Windows.

A Functional Alternative to Dependency Injection in C++.
Satprem Pamudurthy showcases a functional alternative to dependency injection in C++.

About the C++ Core Guidelines.
Andreas Fertig shows us the C++ core guidelines.

Afterwood.
Chris Oldwood reminds us to fix the problem, not to blame.

CppCon 2016: Instruction Re-ordering Everywhere: The C++ 'As-If' Rule and the Role...--Charles Bay

By Adrien Hamelin | Aug 21, 2017 11:58 AM | Tags: performance

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:

Instruction Re-ordering Everywhere: The C++ 'As-If' Rule and the Role of Sequence

by Charles Bay

(watch on YouTube) (watch on Channel 9)

Summary of the talk:

This is an introductory (i.e., "First Principles") dive into instruction re-ordering (at compile-time, and at run-time) due to conspiring by the compiler and CPU to make most efficient use of execution units and resources within the CPU processor core. Discussion is made of the role for sequence, for tracing of data flows and control flows, how "out-of-order" execution occurs within the compiler and CPU, and why that's a "good thing". The importance of the C++ "As-If" rule that allows these optimizations is explained.

Exploration is made of imperative versus sequential devices, physical versus logical sequences, and the role of the CPU cache line. At the end of this talk, it will be obvious for how and why instruction re-ordering occurs, and the programmer's need to consider logical dependencies (and not instruction order) when defining algorithms.

This talk is ideal for any programmer confused after observing instruction reordering in their running systems, and provides a solid basis to begin reasoning about how to leverage parallelism and be concerned with concurrency.

Quick Q: Make C++ fail compilation on specific instantiation of template function

By Adrien Hamelin | Aug 18, 2017 12:11 PM | Tags: intermediate c++11

Quick Q: Delete its constructor

Recently on SO:

Make C++ fail compilation on specific instantiation of template function

Since foo is a complete specialization, it will always get compiled, and the static assert will always get called.

However, there’s an easier way:

template <>
Bar foo<Bar>(Bar val) = delete;

This will say that this specific version is deleted, and cannot be called.

CppCon 2016: Regular Expressions in C++, Present and Future--Tim Shen

By Adrien Hamelin | Aug 18, 2017 11:59 AM | Tags: efficiency advanced

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:

Regular Expressions in C++, Present and Future

by Tim Shen

(watch on YouTube) (watch on Channel 9)

Summary of the talk:

Regular expressions are widely used in application development and data processing, yet it is challenging to design and implement a regular expression library that is expressive, efficient and safe.

In this talk, Tim Shen, the current maintainer of libstdc++'s ＜regex＞, will introduce the basics of implementing regular expressions in C++, the status of existing implementations, and what is expected from the standardization process.

For the implementation, several data structures and algorithms will be introduced, with pros and cons listed; we will show how several popular implementations (Boost.Regex, Boost.Xpressive, ＜regex＞ from standard library implementations, RE2, etc) pick their algorithms. Several popular features/patterns that hurt performance will be explained, with a "safe" regex usage suggested. Finally a wishlist of features will be presented, in order to deliver a more efficient and usable regex library.