intermediate

CppCon 2014 Implementing Wire Protocols with Boost Fusion—Thomas Rodgers

While we wait for CppCon 2015 in September, we’re featuring videos of some of the 100+ talks from CppCon 2014. Here is today’s feature:

Implementing Wire Protocols with Boost Fusion

Summary of the talk:

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.

A Small Set-Algorithm For Enum Values—Felix Petriconi

Inspired by Sean Parent's recent Tweet I came up with this idea:

A Small Set-Algorithm For Enum Values

by Felix Petriconi

From the article:

Often we have in our own production code statements like this:

auto predicate = [](State state) {
  return state == MyEnumClass::ValueA ||
         state == MyEnumClass::ValueD ||
         state == MyEnumClass::ValueEWithAVeryLongName;
};

A better readable solution with less typing is described there.

Generic Parallel Programming

A new video from Meeting C++ 2014:

Generic parallel programming for scientific and technical applications

by Guntram Berti

From the talk description:

Technical and scientific applications dealing with a high computational load today face the challenge to match the increasingly parallel nature of current and future hardware. The talk shows how the increased complexity of software can be controlled by using generic programming technologies. The process and its advantages are introduced using many concrete examples...

A Casting Show—Arne Metz

In this next article Arne Mertz describes different type casts.

A Casting Show

by Arne Mertz

From the article:

In C++ there are two ways of type conversions: implicit and explicit type conversions. The latter are called type casts and they are what this post is about.

Testdriven C++ with Catch

A new video from Meeting C++ 2014:

Testdriven C++ with Catch

by Phil Nash

From the talk description:

C++ has been notorious for being a second class citizen when it comes to test frameworks. There are plenty of them but they tend to be fiddly to set-up and ceremonious to use. Many of them attempt to follow the xUnit template without respect for the language environment they are written for. Catch is an attempt to cut through all of that...

LLDB is Coming to Windows—Zachary Turner

A new article on the LLVM blog speaks about LLDB coming on Windows soon:

LLDB is Coming to Windows

by Zachary Turner

From the article:

We've spoken in the past about teaching Clang to fully support Windows and be compatible with MSVC.  Until now, a big missing piece in this story has been debugging the clang-generated executables.  Over the past 6 months, we've started working on making LLDB work well on Windows and support debugging both regular Windows programs and those produced by Clang...

Don’t Try Too Hard! – Exception Handling—Arne Mertz

Arne Mertz describes in his recent article insights about exception handling.

Don’t Try Too Hard! – Exception Handling

by Arne Mertz

From the article:

Among C++ developers there often appears to be a misconception about what it means to deal with code that can throw exceptions. The misconception is that the possibility of exceptions means one has to try and catch often and almost everywhere. I will try to explain why I think that is wrong and where I think try/catch is appropriate and where not.

Type safe handles in C++—Emil Ernerfeldt

Some time ago, Emil Ernerfeldt wrote about type safe handles. Simple and interesting.

Type safe handles in C++

by Emil Ernerfeldt

From the article:

Let's say you have a system of resources and you identify them using integers as handles. These integers are meaningless to the user, but internally they may be indices into an array, or just a running count...