New paper: N3705, Agenda and Meeting Notice for WG21 Telecon Meeting -- Herb Sutter

By Blog Staff | Jul 24, 2013 08:45 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: N3705

Date: 2013-07-23

Agenda and Meeting Notice for WG21 Telecon Meeting

by Herb Sutter

Excerpt:

Note: As discussed at the previous telecon and in committee email, this telecon is being held one week before the face-to-face meeting, rather than two weeks, to avoid holidays and other conflicts.

New paper: N3704, September Meeting Agenda -- Stephen D. Clamage

By Blog Staff | Jul 18, 2013 08:33 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: N3704

Date: 2013-07-13

Agenda for PL22.16 Meeting No. 61, WG21 Meeting No. 56, September 23-28, 2013 -- Chicago, IL, USA

by Stephen D. Clamage

Excerpt:

The primary focus of this meeting will be CD ballot resolution for C++ 2014.

Remaining time will be devoted to processing DRs and issues from issue lists, as well as work on
proposed new features for future standards. Each working group and study group sets its own detailed
agenda.

Summer standards papers mailing available

By Blog Staff | Jul 2, 2013 10:10 AM | Tags: None

Note: Some of these papers explore potential future standardization directions and alternatives. They do not discuss or propose to amend the C++14 Committee Draft paper whose ballot is currently in progress.

The official mid-meeting standards papers mailing is now available. If you are not currently a committee member, please direct discussion about these papers to the public std-proposals forum.

Note: Most or all of these papers have also been posted already to this site’s Standardization RSS feed.

New paper: N3703, Extending std::search to use Additional Searching Algorithms (v3) -- Marshall Clow

By Blog Staff | Jul 2, 2013 10:05 AM | Tags: experimental

Note: This paper explores potential future standardization directions and alternatives. It does not discuss or propose to amend the C++14 Committee Draft paper whose ballot is currently in progress.

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: N3703

Date: 2013-06-28

Extending std::search to use Additional Searching Algorithms (Version 3)

by Marshall Clow

Excerpt:

Note:

• This is an update of n3606, presented in Portland. The major differences are support for comparison predicates in Boyer-Moore and Boyer-Moore-Horspool, and wording for the standard.
• n3606 was an update of n3411, presented in Portland. The major difference is a different interface for the search functions.

[...]

std::search is a powerful tool for searching sequences, but there are lots of other search algorithms in the literature. For specialized tasks, some of them perform significantly better than std::search. In general, they do this by precomputing statistics about the pattern to be searched for, betting that this time can be made up during the search.

The basic principle is to break the search operation into two parts; the first part creates a "search object", which is specific to the pattern being searched for, and then the search object is passed, along with the data being searched, to std::search.

This is done by adding an additional overload to std::search, and some additional functions to create the search objects. ...

New paper: N3702 Introducing an optional parameter for mem_fn -- Mikhail Semenov

By Blog Staff | Jul 2, 2013 10:02 AM | Tags: experimental

Note: This paper explores potential future standardization directions and alternatives. It does not discuss or propose to amend the C++14 Committee Draft paper whose ballot is currently in progress.

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: N3702

Date: 2013-06-28

Introducing an optional parameter for mem_fn, which allows to bind an object to its member function

by Mikhail Semenov

Excerpt:

When a member function is used as a parameter to another function (the latter is usually called a functional) it is often necessary to provide the corresponding class object as a parameter as well. But functionals, like for example an integral, are often written to accept one global function. In cases when a member function and an object are needed, it is necessary to bind them together,  so that the result can be supplied to the corresponding functional as one parameter. ...

... The proposal is to allow mem_fn to accept a second, optional parameter.

New paper: N3701, Concepts Lite (2nd revision) -- A. Sutton, B. Stroustrup, G. Dos Reis

By Blog Staff | Jul 2, 2013 09:56 AM | Tags: experimental

Note: This paper explores potential future standardization directions and alternatives. It does not discuss or propose to amend the C++14 Committee Draft paper whose ballot is currently in progress.

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: N3701

Date: 2013-06-28

Concepts Lite (2nd revision)

by A. Sutton, B. Stroustrup, G. Dos Reis

Excerpt:

This paper is in its 2nd revision. There have been a number of substantial
changes, which are summarize here.

• The syntax of constrained member functions has changed.
• The syntax of the requires expression has changed.
• We have introduced syntax for constraining generic lambdas, and using constraints wherever auto is used.
• We allow the use of overload sets as arguments to constrained functions.
• The standard wording has been more extensively developed, but does not yet include language for constrained generic lambdas.

This paper is organized like this:

• Tutorial: introduces the new features specified by Concepts Lite, their core concepts and examples.
• User’s guide: provides a more extensive discussion of the proposed features and demonstrates the completeness of the constraints mechanism. We also include some high-level discussion of the language mechanics.
• Discussion: explains what constrains are not. In particular, we try to outline constraint’s relation to concepts and to dispel some common misconceptions about concepts.
• Design Notes: Notes on the design of terse notation for templates and generic lambdas.
• Language definition: presents a semi-formal definition of constraints

New paper: N3700, Hierarchical Data Structures and Related Concepts -- B. Reiter, R. Rivera

By Blog Staff | Jul 2, 2013 09:50 AM | Tags: experimental

Note: This paper explores potential future standardization directions and alternatives. It does not discuss or propose to amend the C++14 Committee Draft paper whose ballot is currently in progress.

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: N3700

Date: 2013-06-22

Hierarchical Data Structures and Related Concepts for the C++ Standard Library

by B. Reiter, R. Rivera

Excerpt:

This paper proposes the addition of library components covering tree structures and related concepts to Programming Languages -- C++. The proposal is based on work towards a Boost Tree component library.

The library strives to cover many of the relevant aspects within the vast field linked to the notion of trees in computer science.

New paper: N3699, A proposal to add a generalized callable negator -- Tomasz Kamiński

By Blog Staff | Jul 2, 2013 09:45 AM | Tags: experimental

Note: This paper explores potential future standardization directions and alternatives. It does not discuss or propose to amend the C++14 Committee Draft paper whose ballot is currently in progress.

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: N3699

Date: 2013-05-27

A proposal to add a generalized callable negator

by Tomasz Kamiński

Excerpt:

The standard negators not1 and not2 accept only unary and binary functors that define argument_type or first_argument_type and second_argument_type respectively, which make them unusable with results of standard library functions such as bind and mem_fn. Furthermore, with relation to N3421, they cannot be used with new operator functor specializations.

This proposal addresses the problem by introducing a template function not_fn that returns complement of arbitrary predicate.

New paper: N3694, Feature-testing recommendations for C++ -- Clark Nelson

By Blog Staff | Jul 2, 2013 09:40 AM | Tags: experimental

Note: This paper explores potential future standardization directions and alternatives. It does not discuss or propose to amend the C++14 Committee Draft paper whose ballot is currently in progress.

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: N3694

Date: 2013-06-27

Feature-testing recommendations for C++

by Clark Nelson

Excerpt:

For the sake of improved portability between partial implementations of various C++ standards, WG21 (the ISO technical committee for the C++ programming language) recommends that implementers and programmers follow the guidelines in this document concerning feature-test macros.

New paper: N3698, July 25-26 Santa Clara SG1 Meeting Announcement and Agenda -- Hans Boehm

By Blog Staff | Jun 30, 2013 08:22 PM | Tags: None

Note: This paper explores potential future standardization directions and alternatives. It does not discuss or propose to amend the C++14 Committee Draft paper whose ballot is currently in progress.

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: N3698

Date: 2013-06-30

July 25-26 Santa Clara SG1 Meeting Announcement and Agenda

by Hans Boehm

Excerpt:

Location

Nvidia, 2701 San Tomas Expressway, Santa Clara, CA. Meet at Building E lobby.

Agenda

2 Discuss parallellism and concurrency extensions for future C++ standards

2.1 Discuss previously submitted concurrency proposals that were insufficiently addressed at the Bristol meeting.

2.2 Discuss other proposals.