June 16-21, Sofia, Bulgaria
September 13-19, Aurora, CO, USA
October 25, Pavia, Italy
November 6-8, Berlin, Germany
November 3-8, Kona, HI, USA
By Adrien Hamelin | Dec 14, 2016 03:05 PM | Tags: intermediate c++11
A good question with a good answer.
When noexcept?
by Edouard of quasardb
From the article:
In a previous post, we had a look at the new constexpr keyword that has been introduced in C++ 11. Today we'll study another new fancy specifier: noexcept...
By Adrien Hamelin | Dec 12, 2016 02:55 PM | Tags: experimental basics
The new if constexpr will change a good part of our code for the better!
Simplifying templates and #ifdefs with if constexpr
by Simon Brand
From the article:
if constexpris a C++17 feature which allows conditionally compiling code based on template parameters in a clear and minimal fashion. It is essentially an if statement where the branch is chosen at compile-time, and any not-taken branches are discarded without being instantiated...
By Vittorio Romeo | Dec 12, 2016 05:32 AM | Tags: c++14 advanced
Does [x = std::forward<decltype(x)>] behave like you expect?
capturing perfectly-forwarded objects in lambdas
by Vittorio Romeo
From the article:
Perfect forwarding and forwarding references allow developers to write generic template functions that retain the lvalueness/rvalueness of passed arguments [...] Let's try to use auto&&, std::forward and C++14's generalized lambda capture syntax to implement our desired semantics. [...] What we really want to do is:
- Capture by copy if a is an rvalue reference.
- Capture by reference if a is an lvalue reference.
[...]
By Adi | Dec 12, 2016 05:16 AM | Tags: c++14 advanced
More interesting facts about captureless lambdas.
Technical Debt
by Adi Shavit
From the article:
The series on captureless lambdas generated some interesting comments.
The articles discusses converting captureless lambdas into function pointers without explicitly specifying the cast-to type, calling conventions and standard conformance and a special callbackizing function for capturing lambdas.
By Adrien Hamelin | Dec 7, 2016 11:48 AM | Tags: experimental basics
The transformation is only a beginning towards catching up from C++98, but it does show why modern C++ features improve your code.
C++ 17 Transformation...
by phantom
From the article:
I'm basically really bad at working on my own projects, but with the recent release of Visual Studio 2017 RC and its improved C++17 support I figured it was time to crack on again...
To that end I've spent a bit of time today updating my own basic windowing library to use C++17 features. Some of the things have been simple transforms such as converting 'typedef' to 'using', others have been more OCD satisfying...
By fj | Dec 5, 2016 04:09 AM | Tags: c++11 basics
Using fundamental types to do "simple things simple" fits very well in the most of cases.
Basic dependent typing
by Krzysztof Ostrowski
From the article:
If we assume that our application uses only a subset of values carried by given fundamental type, we are likely to get warning from the compiler. We shall take that warning seriously. How to inform type system about our assumptions? Example solutions follow.
By Meeting C++ | Dec 1, 2016 09:17 AM | Tags: community
The monthly list of upcoming C++ User Group meetings:
C++ User Group meetings in December
by Jens Weller
From the article:
In total its already 30 groups which are meeting, also there are 10 new groups since the last posting:
Minsk, London, Melbourne, Karlsruhe, Ulm (Qt), San Diego, Belgrade, Luxembourg, Dallas FW, Plano.
By Adrien Hamelin | Nov 29, 2016 02:25 PM | Tags: intermediate
Something we should be aware of:
The One-Definition Rule
by Andrzej Krzemieński
From the article:
We have been hit by the same bug twice already this year. It ends in a crash, and it took developers days to find it (in each case), even though it is reproducible on each run of unit tests. The code, after significant simplifications, looks like this:
namespace tests { struct Fixture { std::vector<int> v1; std::vector<int> v2; static Fixture create(); }; TEST_CASE(test1) { auto fixture = Fixture::create(); std::cout << "running test1"; } }
By Adrien Hamelin | Nov 29, 2016 01:57 PM | Tags: intermediate community
The series continue:
Why you should use Boost.MultiIndex (Part II)
by David Gross
From the article:
A few weeks ago, I posted the first part of this article, where I explained the advantages of Boost.MultiIndex over the standard containers when you need to have multiple views on a set of data.
In this second part, I would like to talk about the benefits you can get from using Boost.MultiIndex as a single-index hash table, as a replacement of
std::unordered_map.One interesting and powerful aspect of Boost.MultiIndex is that it allows you to add an index of type T, where T is different from the stored type. And it is more frequent and useful that you could think.
By Adrien Hamelin | Nov 28, 2016 12:33 PM | Tags: experimental advanced
With the next version of C++.
Compose and curry as folds
by Nick Athanasiou
From the article:
In a previous post we introduced C++17 fold expressions and described a way to extend them for arbitrary callables. Implementation details don’t matter for what we’re elaborating on here but it should be clear that (given the tools we developed) the following is possible:
(Op<F>(args) + ...) (... + Op<F>(args))