I love this talk, it is true gem. Old school, straight to the implementation. No BS 😀Loaded with knowledge and experience. Extra thing added, it considers embedded or more restricted environments. Loop unrolling through std::apply() is wild!
I found some if this very insightful and helpful. I hadn't used std::any, std::variant, or any of the tools with them, but learning this has opened my eyes to trying them out later so I can remember them and hopefully keep in mind when and where to use them when applicable.
I've been using std::variant for some time and found it extremely useful (as a type safe union or using it in a visitor). Along with optional this is best feature in C++17 IMO. I also implemented a number of classes similar to what std::any does but with some additional features and type constrains, but I am yet to find a use case for std::any itself.
Pretty good talk so far, I have played with a lot of these things in my personal projects already. I guess std::function would qualify as runtime polymorphism though, the templates are the static (compile time) version.
My OSS library may be useful to you. It has many STL features, but uses no dynamically allocated memory. I've been maintaining it since 2014. Search 'Embedded Template Library'
This is something I run into quite a lot, so I need to see if this will work for me. I too do embedded systems and the compilers are not as up to date as we'd like, Arduino is, if I recall correctly, C++ 14 and I need to do something like this for a hobby project so it's more than a good example in my case. And I ran into all kinds of weirdness, it seems that if you're having to force the language to abstract an interface, that perhaps that language isn't yet expressive enough to handle it, I would like dynamic polymorphic dispatch... that's true Object Oriented.
My OSS library may be useful to you. It has many STL features, but uses no dynamically allocated memory. I've been maintaining it since 2014. Search 'Embedded Template Library'
Virtual functions require virtual table, which increases size of every single object of given class. Also, calls of such functions are slower, because instead of straightforward functon call we need to look up into vtable and only then call suitable implementation. This is negligible for most cases, but for embedded systems or other constrained enviroments such solution can significantly improve perfomance of program
Deducing This is going to be a game changer for currying and mixins. I use std::variant + overload in my own production code and I am excited to see the static polymorphism capabilities of C++23 reduce both boilerplate and cognitive load. This will lead to much greater acceptance of these tools in community.
@@toolazytobeoriginal4587 I would not use it in real projects. IMHO: Code should be optimized for easy reading. Many years ago when I went through the C++ Standard (2003) I liked coding C++ on its boundaries and find the most clever (I thought at this time) solutions. But this is not easy to read - you could say it’s a skill issue, but you need to assume typically skilled c++ developers. And most of them are not even familiar with e.g. template specialization - specially in embedded.
I love this talk, it is true gem. Old school, straight to the implementation. No BS 😀Loaded with knowledge and experience. Extra thing added, it considers embedded or more restricted environments. Loop unrolling through std::apply() is wild!
Beautiful presentation. Such great examples
Well done presentation. Examples are simple and clear
I found some if this very insightful and helpful. I hadn't used std::any, std::variant, or any of the tools with them, but learning this has opened my eyes to trying them out later so I can remember them and hopefully keep in mind when and where to use them when applicable.
This is a great talk by him. Concise and solid communication
'Deducing this' with CRTP is sooo neat!
i hope this person write book, i am really love his writing in medium.
I've been using std::variant for some time and found it extremely useful (as a type safe union or using it in a visitor). Along with optional this is best feature in C++17 IMO. I also implemented a number of classes similar to what std::any does but with some additional features and type constrains, but I am yet to find a use case for std::any itself.
Agree, C++17 gave us so much elements from functional programming. I also really like to use fold expressions. C++ is awesome
I haven’t used std::variant before, but I use std::optional sometimes when it’s appropriate, I’d like to check this out!
Amazing talk. Loved it :D
Pretty good talk so far, I have played with a lot of these things in my personal projects already. I guess std::function would qualify as runtime polymorphism though, the templates are the static (compile time) version.
Hi Rud! I remember you from a meet-up group years ago. Glad to see you’re doing well. Cheers!
Really good talk! Love to try these :)
CRTP is a cool abstraction, I prefer the Polymorphic Object Oriented Predicate, or POOP. It's easier to POOP than follow CRTP abstractions.
Cool stuff!
If there's a library with this style for embedded i'd love get a look at it. Looks awesome and clean.
Regards
Jean-François
My OSS library may be useful to you. It has many STL features, but uses no dynamically allocated memory. I've been maintaining it since 2014.
Search 'Embedded Template Library'
Nice one. Sad to see no comments here.
We were taught cpp in 11th and 12th grade in turbo cpp. XD i recognise this screenshot very well.
Like his every man style. Credibility from the trenches.
What a good way to express it
Thanks! I didn't realize it, but that is exactly how I wanted it to sound. "Shucks, I'm just another developer talking about m' code."
Nice talk. I just want to provide a little correction: the CTAD line is needed prior to C++17, not C++20.( 21:26 )
I'm way younger, but turbo c++ was my first editor
"I don't care for that, but that's the way C++ works"...
Should definitely be a meme
1:45 I spent thousands of hours using that IDE.
Think you can use std::ref instead of pointers also in the vector
This is something I run into quite a lot, so I need to see if this will work for me. I too do embedded systems and the compilers are not as up to date as we'd like, Arduino is, if I recall correctly, C++ 14 and I need to do something like this for a hobby project so it's more than a good example in my case. And I ran into all kinds of weirdness, it seems that if you're having to force the language to abstract an interface, that perhaps that language isn't yet expressive enough to handle it, I would like dynamic polymorphic dispatch... that's true Object Oriented.
My OSS library may be useful to you. It has many STL features, but uses no dynamically allocated memory. I've been maintaining it since 2014.
Search 'Embedded Template Library'
Same things I thought about last week 😂
35:50 for code.
Interesting but I can’t see the reason for not using virtual functions.
Virtual functions require virtual table, which increases size of every single object of given class. Also, calls of such functions are slower, because instead of straightforward functon call we need to look up into vtable and only then call suitable implementation. This is negligible for most cases, but for embedded systems or other constrained enviroments such solution can significantly improve perfomance of program
@@randomname-cc9hc The techniques that use templates create code for each version which is much larger than that needed for virtual functions.
This old-Timer saying something about C++ programming but I cant figure out where IS start and where is an End? Bit hard to understand.
From a C++ experimental perspective: Nice.
From real coding perspective: Too complex for nearly nothing.
😀
Wait so is it too complex for basically any project or is it simple enough for basically anything?
I used CRTP in the production code this week.
There are plenty of times that this kind of polymorphism is massively simpler than alternatives.
Deducing This is going to be a game changer for currying and mixins.
I use std::variant + overload in my own production code and I am excited to see the static polymorphism capabilities of C++23 reduce both boilerplate and cognitive load. This will lead to much greater acceptance of these tools in community.
@@toolazytobeoriginal4587 I would not use it in real projects.
IMHO: Code should be optimized for easy reading.
Many years ago when I went through the C++ Standard (2003) I liked coding C++ on its boundaries and find the most clever (I thought at this time) solutions.
But this is not easy to read - you could say it’s a skill issue, but you need to assume typically skilled c++ developers.
And most of them are not even familiar with e.g. template specialization - specially in embedded.