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N3781: Single-Quotation-Mark as a Digit Separator -- L Crowl, R Smith, J Snyder, D Vandevoorde

By Blog Staff | Oct 1, 2013 08:07 AM | Tags: None

Note: This paper was adopted on Saturday at the Chicago meeting.

A new WG21 paper is available. A copy is linked below, and the paper will also appear in the next normal WG21 mailing. If you are not a committee member, please use the comments section below or the std-proposals forum for public discussion.

Document number: N3781

Date: 2013-09-25

Single-Quotation-Mark as a Digit Separator

by Lawrence Crowl, Richard Smith, Jeff Snyder, Daveed Vandevoorde

Excerpt:

This paper describes wording changes to implement the use of a single quote (‘) as a digit
separator. It is very similar to the wording changes proposed in N3448, but includes some small
corrections and an addition to Appendix C.

...

[Example: ... The literals 1048576, 1'048'576, 0X100000, 0x10'0000, and 0'004'000'000 all have the same value. — end example] ...

[Example: The literals 1.602'176'565e-19 and 1.602176565e-19 have the same value. — end example]

N3760: [[deprecated]] attribute] -- Alberto Ganesh Barbati

By Blog Staff | Oct 1, 2013 08:03 AM | Tags: None

Note: This paper was adopted on Saturday at the Chicago meeting.

A new WG21 paper is available. A copy is linked below, and the paper will also appear in the next normal WG21 mailing. If you are not a committee member, please use the comments section below or the std-proposals forum for public discussion.

Document number: N3760

Date: 2013-09-01

[[deprecated]] attribute

by Alberto Ganesh Barbati

Excerpt:

This is an update of N3394, bearing changes proposed in the pre-Chicago Drafting Review Teleconference of 2013-08-26. The main difference is that the list of the cases where the attribute can be used has changed, by removing namespaces, enumerators, templates and adding non-static data members.

Motivation

Several existing implementations provide ways to annotate entities whose use is discouraged. The goal is achieved using an implementation-specific decoration syntax. For example: ...

A Tour of C++ -- Bjarne Stroustrup

By Blog Staff | Sep 25, 2013 02:23 PM | Tags: None

tour.jpgBjarne Stroustrup's new book is now available:

A Tour of C++

by Bjarne Stroustrup

(see on Amazon)

From the announcement:

The tone of the book is set when the author uses an analogy to reference "A Tour of C++." He writes, "...think of a short sightseeing tour of a city, such as Copenhagen or New York. In just a few hours, you are given a quick peek at the major attractions, told a few background stories, and usually given some suggestions about what to see next. You do not know the city after such a tour. You do not understand all you have seen and heard. To really know a city, you have to live in it, often for years. However, with a bit of luck, you will have gained a bit of an overview, a notion of what might be special about the city, and ideas of what might be of interest to you. After the tour, the real exploration can begin."

Much of "A Tour of C++" is written as though the reader is having a friendly chat about C++ programming with the author.

C++ Papers for Chicago - Library

By Meeting C++ | Sep 24, 2013 04:51 AM | Tags: standardization library intermediate c++14

This is the third part of my series about the C++ papers for Chicago:

C++ Papers for Chicago: Part 3 - Library

by Jens Weller

From the article:

This week the C++ committee meeting has started in Chicago, and we will hopefully see at its end, what improvements C++14 brings to C++11. And in this 3rd part of my series for the Chicago papers, I will start looking at the library proposals...

New paper: N3774, C++ Needs Language Support For Vectorization -- Axel Naumann, Sandro Wenzel

By Blog Staff | Sep 19, 2013 08:20 AM | Tags: None

A new WG21 paper is available. A copy is linked below, and the paper will also appear in the next normal WG21 mailing. If you are not a committee member, please use the comments section below or the std-proposals forum for public discussion.

Document number: N3774

Date: 2013-09-19

C++ Needs Language Support For Vectorization

by Axel Naumann, Sandro Wenzel

Excerpt:

In this paper we argue that vectorization is a very different concept to parallelization and needs to be supported explicitly by the language. The lack of C++ support for explicit vectorization costs factors (2 to 4 in real code) of performance on current commodity hardware. We demonstrate why we believe vectorization is a much needed language feature. The arguments presented in this paper are based on, and accompanied by, performance measurements of code used at CERN.

POCO 1.4.6p2 and Development Release 1.5.2 are available

By Blog Staff | Sep 19, 2013 03:59 AM | Tags: None

Now available:

POCO Stable Release 1.4.6p2 and Development Release 1.5.2 Available

From the announcement:

Stable release 1.4.6p2 contains mostly bugfixes, upgrades to some bundled libraries (expat, zlib and sqlite) and a few new features (e.g. ColorConsoleChannel). ...

Development release 1.5.2 adds the MongoDB client library, contains significant updates to the JSON library, adds all changes from 1.4.6p2 and a whole lot of other improvements and fixes. ...