N3922: New Rules for auto deduction from braced-init-list -- James Dennett

By Blog Staff | Mar 6, 2014 07:32 PM | 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: N3922

Date: 2014-02-13

New Rules for auto deduction from braced-init-list

by James Dennett

Excerpt:

This paper provides proposed wording to change the rules for auto deduction from a braced-init-list. In particular, the rules for deduction of init-captures from braced-init-list are modified.

N3918: Core Issue 1299: Temporary objects vs temporary expressions

By Blog Staff | Mar 6, 2014 06:28 PM | 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: N3918

Date: 2014-02-12

Core Issue 1299: Temporary objects vs temporary expressions

by Jens Maurer

Excerpt:

This paper presents the propoosed wording for core issue 1299.

The term "temporary object" is consistently applied, and wording is added to define a "temporary expression" as one that permits lifetime extension. The exception object is no longer a "temporary" in that sense (see 15.1 except.throw), since there is no relationship to the other temporary objects mentioned in the standard; the lifetime of the exception object is defined in 15.1 except.throw, not in 12.2 class.temporary.

The drafting below also addresses core issues 943, 1076, and 1300.

N3914: Additional Core Language Issue Resolutions for Issaquah -- William M. Miller

By Blog Staff | Mar 6, 2014 06:26 PM | 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: N3914

Date: 2014-02-14

Additional Core Language Issue Resolutions for Issaquah

by William M. Miller

Excerpt:

The following issue resolutions, in addition to those in "ready" and "tentatively ready" status in document N3833, have been approved by the Core Language Working Group to be applied to the DIS.

C++ User Group Meetings in March

By Meeting C++ | Mar 6, 2014 07:19 AM | Tags: user groups community

The montly overview about C++ User Group Meetings:

C++ User Group Meetings in March 2014

by Jens Weller

From the Article:

The full list of all meetings in march:

10.3 C++ UG Malmö, Sweden - C++folk/ C++11 Lightning talks
10.3 C++ UG Philadelphia - boost spirit
12.3 C++ UG San Francisco/Bayarea - Fun with Lamdas: C++14 Style
13.3 C++ UG Lyon, France
13.3 C++ UG Dresden - building Compilers in C++
17.3 C++ UG Belgium - Whats new in C++14
17.3 C++ UG London
17.3 C++ UG NRW/Dortmund
17.3 C++ UG Denver - C++11 Standard
18.3 C++ UG Berlin - Peter Gottschling - Matrix Template Library
18.3 C++ UG Hamburg
19.3 C++ UG NRW/Düsseldorf - Exception Safety guarantees in C++
19.3 C++ UG North West/Seattle - C++17: I see a monad in your future
20.3 C++ UG Munich - C++ IO Streams
25.3 C++ UG Chicago seems like they need a location!
27.3 C++ UG New York - C++14

N3908: Working Draft, C++ Extensions for Library Fundamentals -- Jeffrey Yasskin

By Blog Staff | Mar 5, 2014 11:51 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: N3908

Date: 2014-03-02

Working Draft, C++ Extensions for Library Fundamentals

by Jeffrey Yasskin

Excerpt:

This technical specification describes extensions to the C++ Standard Library (1.2). These extensions are classes and functions that are likely to be used widely within a program and/or on the interface boundaries between libraries written by different organizations.

N3903: C++ CD Comment Status Rev. 6 -- William M. Miller

By Blog Staff | Mar 5, 2014 10:49 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: N3903

Date: 2014-03-03

C++ CD Comment Status Rev. 6

by William M. Miller

Excerpt:

This document summarizes the status of WG21 after the 2014-02 (Issaquah) meeting in addressing National Body comments on Committee Draft document N3690.

In total, 85 comments were received. To date, 39 have been accepted as proposed, 21 have been accepted with modifications, 25 have been rejected, and 0 remain to be addressed.

N3901-2: Minutes (February 2014) WG21 and PL22.16 Meetings -- Kyle Kloepper

By Blog Staff | Mar 5, 2014 10:34 AM | Tags: None

New WG21 papers are available. A copy of each 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: N3901-2

Date: 2014-03-03

Minutes (February 2014) WG21 Meeting No. 57

Minutes (February 2014) PL22.16 Meeting No. 62

by Kyle Kloepper

Excerpt:

WG21 motions:

WG21 motion 1: Move to appoint an editing committee composed of Daniel Krügler, Alisdair Meredith, Mike Miller, Bjarne Stroustrup, and Jeffrey Yasskin to approve the correctness of the C++ working paper as modified by the motions approved at this meeting, and to direct the Convener to transmit the approved updated C++ working paper to ITTF for DIS ballot.

Moved by: Hedquist

Seconded by: van Winkel

PL 22.16 unanimous consent 

WG21 unanimous consent

N3955: Group Member Specifiers -- Andrew Tomazos

By Blog Staff | Mar 1, 2014 07:23 PM | 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: N3955

Date: 2014-02-25

Group Member Specifiers

by Andrew Tomazos

Excerpt:

We propose allowing a space-separated sequence of specifiers to be placed after an access specifier in a class definition. The specifiers so placed are applied to each member declaration in the group following the access-specifier. ...

In class definitions, many times there are contiguous sequences of member declarations that have common specifiers. Under the proposal these common specifiers can be specified once at the start of a group of member declarations, rather than repeated for each member declaration. This can in some cases lead to cleaner, safer, easier-to-write, easier-to-read and easier-to-maintain code.

So instead of:

class foo : public bar
{
public:
    explicit foo(int);
    explicit foo(float);
    explicit foo(double);

protected:
    virtual T f() const override;
    virtual U g() const override;
    virtual V h() const override;
    virtual W i() const override;

private:
    static constexpr int X = 123;
    static constexpr float Y = 42.0f;
    static constexpr double Z = 123.0;
};

You could with group member specifiers equivalently write:

class foo : public bar
{
public explicit:
    foo(int);
    foo(float);
    foo(double);

protected virtual const override:
    T f();
    U g();
    V h();
    W i();

private static constexpr:
    int X = 123;
    float Y = 42.0f;
    double Z = 123.0;
};

N3928: Extending static_assert, v2 -- Walter Brown

By Blog Staff | Mar 1, 2014 07:16 PM | 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: N3928

Date: 2014-02-14

Extending static_assert, v2

by Walter Brown

Excerpt:

Following EWG guidance, this paper proposes wording to permit a default string literal for static_assert.

N3926: LWG Issue 2168 is NAD -- Walter Brown

By Blog Staff | Mar 1, 2014 07:13 PM | 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: N3926

Date: 2014-02-14

LWG Issue 2168 is NAD

by Walter Brown

Excerpt:

LWG issue 2168 reports a perceived inconsistency between two parts of the library’s specification for uniform_real_distribution. This paper argues that there is no inconsistency and that the issue should therefore be closed as NAD.