Vittorio Romeo
@supahvee1234
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5,382
Following
456
Media
394
Statuses
4,599
Software Engineer at Bloomberg LP. I write code, lift weights and play games. I also like everything sci-fi. Views and opinions are my own. |
Joined December 2011
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Pinned Tweet
It's finally done -- "Embracing Modern C++ Safely" now has an official release date! 🎉
Get the digital version of the book on 23 December 2021. Available NOW for PRE-ORDER (see below).
Please re-tweet! :)
#cpp
#programming
#coding
#cplusplus
@Pearson
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Pictured: C developer is informed about a useful warning flag.
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Can easily do the same in C++. For example, here's a function that returns two 'long' objects:
#cpp
In Go, a function can return MULTIPLE results?! This is mindblowing 🤯
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Fighting a dragon in
@Quake
VR with full
#valveindex
finger tracking. Powered by Modern
#cpp
❤️
Free and open-source.
#ar
#foss
#gamedev
#idsoftware
#indiedev
#oculus
#openvr
#quake
#quakevr
#virtualreality
#vr
#vrdev
@valvesoftware
@htcvivepro
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I needed to help my students visualize struct layout and padding bytes, so I created a C++20 pretty printer (see picture).
Available below, use/improve it as you like!
#cpp
#cpp20
#metaprogramming
#reflection
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I hear you, here's an improved version.
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Every time someone paints compile-time safety as "hand-holding" and "weakness" I die inside.
Programming languages are tools meant to make our lives easier and help us achieve our goals.
Tools are NOT a vessel to demonstrate one's "strength" or "power".
#cpp
#rust
#rustlang
@seanbax
With great power comes great responsibility.
There is a memory-safe path in C++. The tools are all there but C++ doesn’t hold your hand. You need to learn how to write safe code. If you do you’re rewarded with an incredibly efficient and capable result.
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BTW, before anyone asks -- I am not implying that all C developers are like this with the caption of my tweet.
I am merely stating the fact that the person in question was developing in C.
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Finally, Rust reached feature parity with C++!
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> "someone who codes in C doesn’t want their hand held with compiler warnings"
most safety-conscious C programmer 🤦
C is just syntactic sugar for assembly language, which is the reason it’s so good. It requires great skill but gives full control.
Someone who codes in C doesn’t want their hand held with compiler warnings. Obfuscation is designed in.
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If you cannot explain these concepts to another programmer, then you are not a C++ Developer
- `std::launder`
- Integral promotion rules
- `[[carries_dependency]]`
- Partial template ordering rules
- `std::memory_order::consume`
- Type aliasing rules
- Pseudo-destructors
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@AndyJessop33500
The code I posted is a joke, but you can return tuples/pairs/structs in C++ and destructure then via "structured bindings".
Sorry 😅
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My unpopular
#cpp
opinion: the next major compiler releases should implicitly turn on `-Wall`, `-Wextra`, and `-Wpedantic` by default, and introduce a `-Wno-default-warnings` flag for backwards compatibility.
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I mostly share your sentiment, but the sad truth is that Rust's metaprogramming is years behind C++'s.
Macros are not a substitute for type-level metaprogramming and compile-time evaluation.
#cpp
#rust
It's amazing how quickly Rust's core team completely demolished any possibility of having half-decent metaprogramming for potentially years. It's still better than C++, but that's a low bar, and I was hoping Rust could get a little higher than... this.
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"I have a small gripe with filesystem's API so I'm going to shit on the entire committee's experience and volunteer work while ignoring all the good things about Modern C++ for easy echo chamber Twitter likes."
The more I use modern C++ features the more I wonder if the people designing that stuff actually ever did some real programming. Instead of keeping things simple and straight forward everything feels like badly designed joke.
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"An Extensive Benchmark of C and C++ Hash Tables" by Jackson Allan
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A new article, "The Sad State of Debug Performance in C++", is now available on my website:
Featuring tweets by
@vzverovich
and
@ChrisGr93091552
.
Shout-out to
@wakomeup
and
@zygoloid
for their hard work on improving the situation!
#cpp
#gamedev
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There we go, my code is 5.2x faster than
@cmuratori
's, and simpler!
Of course, it's easy when there are no requirements to meet ;)
#cpp
#gamedev
@supahvee1234
@cmuratori
I think it would be VERY educational if you chose a case of "maintainable" code you think it's better, and
@cmuratori
presented his version. Initially, I'm personally prone to agree with Casey
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1. Make it work
2. Make it right
3. Make it fas- oh wait you didn't design with performance in mind
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C developers out there really be writing
Vector2Add(&res, pos, vel);
instead of
res = pos + vel;
🤦♀️
C is a horrible language because who even thought "typedef struct { ... } my_struct_t" is a good syntax?
That's why you always go for C++. If you do actual C then you're either memeing or just dumb.
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I like this new feature, but I feel like the syntax is way too implicit. It will be unfamiliar to most developers! How about:
std::same_as<int> auto n = 42;
?
BREAKING: C++26 will add named auto. For example, instead of
auto n = 42;
you'll be able to write:
int n = 42;
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Hey
@idSoftware
, you can now punch
#quake
grunts in the face... or also smack them with your weapon. Coming soon to your favorite
#vr
headset 😎
#virtualreality
#vrdev
#gamedev
#cpp
#oculus
#valveindex
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Cope. In practice:
- No destructors/RAII -> mental overhead, can be catastrophic in case of mistakes
- Poor abstraction/encapsulation -> higher chance of safety issues or mistakes
- No templates -> abuse of token macros or code duplication
Zero reason to use C instead of C++.
People don't understand that C's limited feature set is GOOD, and not something you grow out of:
• Syntax doesn't hide expensive/complex operations
• Focus on coding and not language trivia
• Compiles fast
No other mainstream language understands this.
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TIL that the
#JavaScript
world has a prolific
@npmjs
contributor of over 1420 one-liner packages:
@jonschlinkert
.
One of these gems is `is-valid-path`, which simply includes `is-invalid-path`, and prepends a `!` to its result. Used by almost 9k projects.
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@nilansaha
I wasn't 100% serious. But the thought of even more shallow AI-generated spam (replies, advertisements, influencer bullshit) I have to sift through to actually find worthwhile content makes me feel sad.
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This kind of UI should be illegal. I always end up typing too fast and the textbox focus switch can't keep up.
Use a single textbox. If you want to make the required number of digits obvious, put some underlines in the textbox.
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Duh, of course there's an easier way. Why would you write the if-else chain by hand? Just generate it via
#cpp
template metaprogramming. 🙄
Look at that beautiful assembly!
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@cmuratori
's "Clean Code, Horrible Performance" post does as much damage to the industry as blindly applying the OOP rules he criticizes. The entire post is a strawman.
In many domains, run-time performance is not a priority. Delivery, velocity, and teamwork are.
#cpp
#gamedev
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How to fix a buffer overrun after hours of debugging on Visual Studio:
1. Boot to Linux
2. -fsanitize=address
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One of those "mind-blowing" talks that everyone should see: “Transducers: from Clojure to C++"
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A sample of my book, "Embracing Modern C++ Safely", is now available on
@InformIT
:
Contents:
- Forewords by Shawn Edwards and Andrei Alexandrescu (
@incomputable
)
- `override`
- `[[deprecated]]`
- `extern template`
- `inline namespace`
- Index
Enjoy!
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As much as I love
#cpp
and genuinely enjoy using/teaching it, most people defending its future or criticizing Rust are clutching at straws.
Evolving C++ is beneficial for existing codebases, but we can do much better for new ones.
I'd rather invest in
@rustlang
than C++ 2.
Speaking of languages, it's time to halt starting any new projects in C/C++ and use Rust for those scenarios where a non-GC language is required. For the sake of security and reliability. the industry should declare those languages as deprecated.
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@template_rex
I could have definitely delivered the same advice in a nicer form. I will do better next time. Still, I believe the reaction was disproportionate. Very disproportionate.
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Here's an header-only library for 2018 startups that fits in a single tweet:
template <typename T>
using blockchain = std::list<T>;
template <typename T>
using flat_blockchain = std::vector<T>;
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Basic ~50 LOC reflection-based AoS to SoA transformation POC with Modern
#cpp
and
@Boost_Libraries
PFR.
Allows to change storage policy at compile-time without touching neither gameplay logic code nor component struct definitions.
#gamedev
#ecs
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If I had a nickel for every time I shared this screenshot I would have already bribed the Standard Committee to remove `std::bind` from the Standard Library
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DISCLAIMER: this is a joke, I am taking the piss at the original tweet.
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Some data - removed "
#include
<algorithm>", added "static inline UINT min(UINT x, UINT y) { return x < y ? x : y; };".
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Since a few people have asked, I was supposed and really looking forward to being at
@meetingcpp
, but unfortunately I got in a car accident on the highway on the way to the airport, due to a mechanical malfunction.
I am OK, despite severe pain. Here's what happened:
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Hired an intern for my home office. So far, productivity gains have been negative. However, he's trying his best...
Everyone, meet Byte🐱
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the pain of template metaprogramming distracts me from the pain of existence
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Rare Jason bad take 😔
5 minutes is an unreasonably long time for most projects.
Fortunately, C++ build times can be very fast with good practices and tooling 👇👇
#cpp
#gamedev
#accu
Me: Do you have long compile times?
Students: yeah
Me: how long is long
Students: a full clean build can be 5 minutes!
Me: ok... Moving on to the next topic...
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Small (but meaningful)
#cpp
improvements like these make me irrationally happy. Kudos to the GCC contributors! <3
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Since you liked my variant so much, here's a great implementation of a tuple. Look at the amazing codegen!
#cpp
#cursedcpp
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ChatGPT, Copilot, and other LLMs are so freaking garbage at
#cpp
that it would be best if "C++" became a blacklisted token.
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It actually happened... I encountered a
#cpp
codebase that used 'concept' as an identifier and was forced to rename all usages to migrate to C++20.
Backwards compatibility? Lies!
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You’re a great engineer if you know the definition of:
- pseudodestructor
- ODR-used
- ill-formed NDR
- dependency-ordered before
- pointer-interconvertible
- multi-pass guarantee
- phase synchronization point
- vacuous initialization
What else would you add?
#cpp
#gatekeeping
You’re a great engineer if you know the definition of:
- idempotent
- monoid
- decoupled
- dependency injection
- unit
- functional programming
- asynchronous vs parallel programming
- thread locking
- eventual consistency
- exactly-once semantics
- lambda vs kappa
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You're less likely to debug something from `<algorithm>` compared to an error-prone manually written loop. Algorithms are templates (inlined), so link times are unaffected. `accumulate` autovectorizes just as well as a loop. Only valid concern is compile time.
Don't spread FUD.
@kinjalkishor
Debug performance. Debugging. Compile times. Link times. Inability to reason about performance. Inability to use SIMD. Inability to reason about overflow, order or operations or anything else really. Lots.
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One of the luxuries of being outside of the game development industry is the lack of toxic, close-minded, and jealous coworkers.
I still love gamedev as a hobby, but I cannot recommend it as a real job to any young developers.
These are many examples of people like Balazs :(
@Manu343726
@scaipgec
@supahvee1234
From seeing Vittorio's code, I assume, in his line of work, the enormous budget wasted on the project allow kids to experiment with stupid c++porn, instead of solving actual fucking problems ;)
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Awesome news from
@Boost_Libraries
:
"Boost library authors and maintainers are free to drop support for old C++ standards in their libraries, at any time."
I expect this new policy to bring better compilation times and smaller libraries. 👍
#cpp
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How I spent my morning: writing a short paper to convince
@godotengine
maintainers to not reject my PR on the basis that I refused to rely on transitive includes when explicitly asked to do so.
Yup.
#cpp
#gamedev
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Fast compilation times are important.
I've done a lot of work to improve them on
@sfmldev
, and I'm pleased to say that a full rebuild of SFML 3.x, including tests and examples, takes on average ~6s on my system.
I will be speaking about this at
@ACCUConf
:)
Currently investigating an issue with Boost coroutines for a customer:
The repro .cpp file I got has 56 lines only, but includes <boost/asio.hpp> among other things. That file takes more than 19 seconds to compile on my machine.
The same machine compiles *all* of Live++ in <10s.
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#cpp
pet peeve, this shouldn't be your only API:
std::vector<std::byte> read_file(const std::filesystem::path& p)
This should:
void append_file_into(std::vector<std::byte>&, const std::filesystem::path&);
Former can be defined in terms of latter, allows vector reuse.
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New article on functional patterns : "zero-overhead C++17 currying & partial application". Special thanks to
@awtem
!
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Inspired by
@krisjusiak
's latest tweet, here's my attempt at visually explaining his implementation of `nth_pack_element` -- hope this helps!
#cpp
It's a particularly cool snippet because it doesn't require any recursion :)
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Average anti-abstraction developer in 2024: "you don't need functions" 😅
Encapsulation of data behind functions is probably the single biggest performance destroyer of modern programming practices out there.
Invert the relationship. Expose data publicly in global memory. Use them as your interfaces instead of functions. One stage of a pipeline writes
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Yes, the `reinterpret_cast` is definitely less evil than the `static_cast`...🙄/s
Code for readability and maintainability, not to save a few keystrokes.
C++ version is also more greppable and *discourages* frequent casting - that's good!
#gamedev
#cpp
my unpopular opinion:
this is not evil: (float)x
this is: static_cast<float>(x)
too much typing, too much to read, no benefit
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5G causes COVID-19.
The ISO C++ committee makes C++ more complex to make money from courses.
Obama was a reptilian.
9/11 was an inside job.
@supahvee1234
@richgel999
@RealBisqwit
Your weights are obviously different, but as you seem to make money explaining people the intricate details of Modern C++, it seems you are incentivized to make it more complex in the long run ;)
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@vzverovich
So they added destructors to Python. But did they add the most important C++ feature as well? (UB)
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I proudly present to you... "Wordlexpr", a purely compile-time version of
#Wordle
, written in C++20!
#cpp
#gamedev
#cpp20
#cplusplus
#programming
#coding
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@__phantomderp
Please give me a scripting languages with types, value semantics, and arrays that start at 0 😭
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The best PRs are the ones that get rid of code!
Managed to remove 5000 lines in my last one😎
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