CodeSynthesis XSD 4.0.0 Released, Adds Support for C++11

CodeSynthesis XSD 4.0.0 Released, Adds Support for C++11

XSD is an open source, cross-platform W3C XML Schema to C++ data binding compiler. Provided with a schema, it generates C++ classes that represent the given vocabulary as well as XML parsing and serialization code. You can then access the data stored in XML using types and functions that semantically correspond to your application domain rather than dealing with elements, attributes, and text in a direct representation of XML such as DOM or SAX.

Major new features in this release:

  • Support for C++11 in addition to C++98.
  • Support for ordered types including mixed content.
  • Support for anyType and anySimpleType content extraction as DOM and text, respectively.
  • Improved streaming, partially in-memory parsing and serialization support including better XML namespace handling and streaming at multiple document levels.
  • Automatic generation of make-style dependency information.

This release also adds support for Clang as well as Visual Studio 2012 (11.0) and 2013 (12.0).

A more detailed discussion of these features can be found on the blog. For the complete list of new features in this version see the official release announcement.

XSD is written in portable C++ (both C++98/03 and C++11 are supported) and you should be able to use it with any reasonably modern C++ compiler. In particular, we have tested this release on GNU/Linux (x86/x86-64), Windows (x86/x86-64), Mac OS X (x86), and Solaris (x86/x86-64/SPARC) with GNU g++ 4.2.x-4.8.x, MS Visual C++ 2005, 2008, 2010, 2012, 2013, Sun Studio 12u2, and Clang 3.x.

More information, documentation, source code, and pre-compiled binaries are available on the project's page.

A video interview with Michael Wong

At C++Now this and last year I recorded a short interview with Michael Wong:

A video interview with Michael Wong

The interview as a youtube playlist

by Jens Weller

From the Article:

I've started last year a video interview in Aspen - while at C++Now - with Michael Wong. This year I had the chance to finish the interview and I am now finally able to release it. Michael is a member of the C++ Committee for many years, he leads the Canadian delegation and also speaks for IBM at the C++ committee.

7 Reasons C++ Devs Will Love the VS 14 CTP—Nish Sivakumar

Fresh on CodeProject:

7 Reasons C++ Devs Will Love the VS 14 CTP

by Nish Sivakumar

From the article:

This is by no means a comprehensive list of C++ features added in the VS 14 CTPs, nor does it try to be. It's merely a small selection of C++ language and IDE features that I felt were attractive to a C++ developer from a practical point of view. These are features that I feel developers could start using in their code right away...

Non-Static Data Member Initializers—741MHz

In case you missed it:

Non-Static Data Member Initializers

by 741MHz

From the article:

...  This problem is addressed in C++11 by allowing non-static data members to be initialized along with a declaration. For example, the following syntax is allowed:

struct foo {
    double x = 1.23;
    int y = 1;
    int z = 2;

This also works well with multiple constructors. The class described above could now be simplified and made easier to maintain further down the road: ...


Dr. Bjarne Stroustrup: An Interview—Emyr Williams

This month's CVu carries this new interview with Bjarne Stroustrup. (Note: As CVu is subscription-only, the link is to a copy of article hosted at Stroustrup's site.)

Dr. Bjarne Stroustrup: An Interview

by Emyr Williams

From the article:

In 2013, I heard Pete Goodliffe talk about becoming a better programmer, and he lined up panel of experts about how to become a better programmer. Having heard the talk, I endeavoured to put as much of it as I could in to practice. During one of the intervals, I had a chance meeting with Bjarne Stroustrup, who was gracious enough to agree to be interviewed for my blog. I was also encouraged to publish it in the ACCU magazine, so here we are...

CppCon Program Highlights, 7 of N: (More) Boost

The CppCon 2014 conference program has been posted for the upcoming September conference. We've received requests that the program continue to be posted in "bite-sized" posts, a few sessions at a time, to make the 100+ sessions easier to absorb, so here is another set of talks. This series of posts will conclude once the entire conference program has been posted in this way.


The libraries are central to Modern C++, and so CppCon includes thorough coverage of the "what's new and/or important" in Boost. Several Boost talks have already been mentioned in this blog post series about using Boost in particular domains -- here are additional Boost talks not yet posted here.

Breaking news: We start this post with a talk on Boost.ASIO because if you haven't learned ASIO yet, you'll certainly want to -- as of June 2014 it is (finally) on the fast track for ISO standardization, so a September CppCon talk on ASIO is quite timely.

In this post:

  • Boost.Asio and Boost.Serialization: Designs for Object Transmission
  • Implementing Wire Protocols with Boost Fusion
  • Metaprogramming with Boost.Hana: Unifying Boost.Fusion and Boost.MPL
  • How You Can Make a Boost C++ Library


Boost.Asio and Boost.Serialization: Designs for Object Transmission

Network programming in C++ frequently requires programmers to find a way to express C++ objects as a sequence of bytes which can be transmitted and reconstructed on another network endpoint. In the case of simpler objects (such as most PODs), object serialization is trivial to perform.

For more complex C++ constructs (polymorphic objects, etc), the approach to serialization is more challenging. This talk will discuss how two powerful Boost libraries, Asio and Serialization, can be used to craft C++ networking code that can handle a vast array of uses cases. A prototype for a message passing framework will be developed throughout the talk.

Programmers familiar with or interested in network programming (but perhaps unfamiliar with Boost.Asio, Boost.Serialization or both) are the intended audience. No prior knowledge of Boost.Asio and Boost.Serialization will be assumed, and alternatives to both libraries will be discussed.

Speaker: Bryce Adelstein-Lelbach Bryce Adelstein-Lelbach is a researcher at the Center of Computation and Technology (CCT) at Louisiana State University. He works on the HPX runtime system and his research interests include parallel and distributed programming frameworks for scientific applications. He has been working on HPX for over a year now.


Implementing Wire Protocols with Boost Fusion

There are a number of common serialization formats available which work well for marshaling C++ types into messaging protocols, e.g. ProtoBufs, Thrift, JSON, XML, FIX, etc. Unfortunately, not every protocol uses one of these popular encodings and instead implements a unique binary protocol. The classical "C" way of handling binary protocols is to use packed structs, unfortunately there are many binary protocols which are not particularly friendly to using this approach due to things like nested variable length data structures, etc.. The packed struct approach is also fairly limited in that it only generally supports primitive POD types.

This talk will explore an approach that uses Boost's Fusion library to implement an easily extensible serialization mechanism for on a non-trivial binary financial exchange protocol which exposes the underlying data in terms of "modern" C++ types. The talk will also cover aspects of general use of Boost Fusion and Boost MPL, type traits, enable_if, SFINAE, and other members of the C++ type system bestiary.

Speaker: Thomas Rodgers, Senior Software Engineer, DRW Trading Group. Thomas has been programming in C++ since 1989 and a member of the C++ Standards Committee since 2013. Thomas has worked in the financial industry since 1996 and currently works for DRW Trading Group in Chicago.


Metaprogramming with Boost.Hana: Unifying Boost.Fusion and Boost.MPL

Template metaprogramming sucks. No, seriously; you might like the imposed purely functional paradigm, but not the templates themselves. While C++11 has made our life easier, even simple metaprograms are often hard to write, impossible to maintain and slow to compile; we need better abstractions. In this talk, I will present Boost.Hana (, an experimental C++14 library for heterogeneous computation. The library takes metaprogramming to a whole new level of expressiveness by unifying the well-known Boost.MPL and Boost.Fusion libraries under a single generic, purely functional interface. The library incorporates some of the most recent advances in C++ metaprogramming; I will give an overview of the most interesting implementation techniques used internally. Finally, I will show concrete ways to use the library so you, as a developer, can write less template black magic, increase your productivity and spend less time in coffee breaks waiting for the compiler (sorry).

Speaker: Louis Dionne Louis is a programming enthusiast and math student living in Quebec City, Canada. He focuses mainly on metaprogramming and functional programming in C++ or other languages. Recently, he has been looking at ways to make C++ metaprogramming more enjoyable by combining C++11/1y techniques with functional programming concepts. In particular, he is working on this very topic as a GSoC student with Boost for the summer of 2014.Website:


How You Can Make a Boost C++ Library

The purpose of this presentation is to encourage C++ programmers to create and submit new quality C++ libraries to Boost.

Premises: a) C++ needs more quality libraries b) There are many C++ programmers who would like to contribute libraries but they are discouraged by the amount of effort and associated heartache.

Methodology: Walk through the website from the point of view of a C++ library contributor. It will address issues related to requirements, suggested tools, user feedback, library promotion. It will assume that the attendee is an intermediate to advanced C++ programmer with his own idea for a library.

Speaker: Robert Ramey Robert Ramey is a freelance Software Developer living in Santa Barbara, California. (See His long and varied career spans various aspects of software development including business data processing, product, embedded systems, custom software, and C++ library development. Lately, he has been mostly interested in C++ library design and implementation related to Boost. He is the author and maintainer of the Boost Serialization library and a frequent contributor to the Boost developers list. Website:


N4127: Checked-dereference conditions—Eelis van der Weegen

A new WG21 paper is available. If you are not a committee member, please use the comments section below or the std-proposals forum for public discussion.

Document number: N4127

Date: 2014-07-20

Checked-dereference conditions

by Eelis van der Weegen


This is a proposal to add a new form of condition...

For example,  if (T x : e) s  translates to  if (auto && __p = e) { T x = *__p; s }  for some invisible name __p.

Translation for the new form of condition in a while or for loop is analogous.

The "next generation" version where the type defaults to auto && is also proposed.

CppCon Third Keynote—Boris Kolpackov

CppCon has announced its third keynote, filling out the keynote slots for this year’s event. It’s by respected gaming industry veteran Mike Acton on data-oriented design, which is essential for high performance -- or even reasonable performance -- on modern systems from servers to smartphones.

If you're wondering why data-oriented design is so 'essential,' as a backgrounder check out slides 31-37 of Herb Sutter's April 2014 talk and the cited example of a 50x performance difference achieved by doing nothing but changing the order of objects in memory. That's just an appetizer for Acton's keynote, and it's applicable to way more than gaming.

You won't want to miss this or any of this year's other keynotes and over 100 sessions in the 2014 program. From the announcement:

Data-Oriented Design and C++

by Mike Acton

The transformation of data is the only purpose of any program. Common approaches in C++ which are antithetical to this goal will be presented in the context of a performance-critical domain (console game development). Additionally, limitations inherent in any C++ compiler and how that affects the practical use of the language when transforming that data will be demonstrated.

Speaker’s bio: Mike Acton is Engine Director at Insomniac Games. When he’s not searching for new ways to optimize Insomniac’s engine, he dreams up new ways to help the development community. Mike can often be found extolling the virtues of understanding the data and hardware first along with programming for performance.

Inheriting Constructors in C++11—741MHz

Following up on Monday's linked article:

Inheriting Constructors in C++11

by 741MHz

From the article:

Delegating Constructors [... are] extremely useful in boosting efficiency, [but] it does not solve the problem when programmer wants to create a derived class that has exactly the same set of constructor as its base class or classes. In which case programmers are forced to tediously duplicate constructors of the base class...

C++11 solves this problem by introducing constructor inheritance. In a derived class, programmers can write a single using T::T; statement that makes a derived class automatically inherit constructors of a base class. For example: ...