circle
abseil-cpp
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circle | abseil-cpp | |
---|---|---|
54 | 54 | |
2,165 | 13,917 | |
- | 2.4% | |
5.0 | 9.5 | |
6 months ago | 5 days ago | |
C++ | C++ | |
- | Apache License 2.0 |
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.
circle
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How difficult would it be to make a c++ compiler
Sean Baxter created a front end c++ compiler by himself, using llvm for the back end and the gcc or clang stl. I think it took him a couple of years. https://www.circle-lang.org/. Before this happened I heard a couple of different people claiming that there would never be a totally new compiler as it was too much work.
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Toward a TypeScript for C++"
The real Typescript for C++ is Circle.
https://www.circle-lang.org/
Just like Typescript to JavaScript, the syntax is an evolution of what already exists, not a completely different syntax.
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A Metaobject Protocol for C++ [pdf]
Sean Baxter's Circle [1] is arguably the spiritual successor to MOP.
[1] https://www.circle-lang.org/
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Circle Evolves C++ [video]
Context: https://github.com/seanbaxter/circle/blob/master/new-circle/...
Note that Circle is not an F/OSS compiler as someone pointed out before. This however doesn't make Circle less relevant, because it is actually a testament to show that C++ could have been much better without the claimed breakage. If Circle does provide a number of desirable features and its compiler can be built by a single person, then why shouldn't the committee do the same?
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My (Herb Sutter's) C++ Now 2023 talk is online: “A TypeScript for C++”
From all wannabe C++ replacements candidates, the only language that is really a TypeScript for C++, is Circle.
For whatever reason, Herb Sutter decided to ignore this language on the presentation.
https://www.circle-lang.org/
This is the only one with the syntax based on C++, incrementally changing the features via #pragma settings.
"Circle Fixes Defects, Makes C++ Language Safer & More Productive"
https://www.youtube.com/watch?v=x7fxeNqSK2k
"Circle Evolves C++"
https://www.youtube.com/watch?v=P1ZDOGDMNLM
- File for Divorce from LLVM
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Making C++ Safe Without Borrow Checking, Reference Counting, or Tracing GC
The second someone makes a successor language that seamlessly/directly interops with C++ _AND_ has the level of build/IDE tooling that C++/Rust have, I'm on board.
The closest thing right now is Sean Baxter's "Circle" compiler in "Carbon" mode IMO:
https://github.com/seanbaxter/circle/blob/master/new-circle/...
Unfortunately, Circle is closed-source and there's no LSP or other tooling to make the authoring experience nice.
- Circle-lang: A feasible, simple, and immediate way for C++ to break out of the rut it's been in. Surprised more people aren't talking about it.
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Recurrence-expression is a programmable superset of fold-expression
I read through the whole of https://github.com/seanbaxter/circle/blob/master/new-circle/README.md and man, I'm drooling. Awesome work, kudos.
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Dropping support for old C++ standards
Have a look at Circle from Sean Baxter [0]. It's pretty impressive.
[0]: https://github.com/seanbaxter/circle/blob/master/new-circle/...
abseil-cpp
- Sane C++ Libraries
- Open source collection of Google's C++ libraries
- Is Ada safer than Rust?
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Appending to an std:string character-by-character: how does the capacity grow?
Yeah, it's nice! And Abseil does it, IFF you use LLVM libc++.
https://github.com/abseil/abseil-cpp/blob/master/absl/string...
The standard adopted it as resize_and_overwrite. Which I think is a little clunky.
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Shaving 40% Off Google’s B-Tree Implementation with Go Generics
This may be confusing to those familiar with Google's libraries. The baseline is the Go BTree, which I personally never heard of until just now, not the C++ absl::btree_set. The benchmarks aren't directly comparable, but the C++ version also comes with good microbenchmark coverage.
https://github.com/google/btree
https://github.com/abseil/abseil-cpp/blob/master/absl/contai...
- Faster Sorting Beyond DeepMind’s AlphaDev
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“Once” one-time concurrent initialization with an integer
An implementation of call_once that accommodates callbacks that throw: https://github.com/abseil/abseil-cpp/blob/master/absl/base/c...
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[R] AlphaDev discovers faster sorting algorithms
I wouldn't say it's that cryptic. It's just a few bitwise rotations/shifts/xor operations.
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Deepmind Alphadev: Faster sorting algorithms discovered using deep RL
You can see hashing optimizations as well https://www.deepmind.com/blog/alphadev-discovers-faster-sort..., https://github.com/abseil/abseil-cpp/commit/74eee2aff683cc7d...
I was one of the members who reviewed expertly what has been done both in sorting and hashing. Overall it's more about assembly, finding missed compiler optimizations and balancing between correctness and distribution (in hashing in particular).
It was not revolutionary in a sense it hasn't found completely new approaches but converged to something incomprehensible for humans but relatively good for performance which proves the point that optimal programs are very inhuman.
Note that for instructions in sorting, removing them does not always lead to better performance, for example, instructions can run in parallel and the effect can be less profound. Benchmarks can lie and compiler could do something differently when recompiling the sort3 function which was changed. There was some evidence that the effect can come from the other side.
For hashing it was even funnier, very small strings up to 64 bit already used 3 instructions like add some constant -> multiply 64x64 -> xor upper/lower. For bigger ones the question becomes more complicated, that's why 9-16 was a better spot and it simplified from 2 multiplications to just one and a rotation. Distribution on real workloads was good, it almost passed smhasher and we decided it was good enough to try out in prod. We did not rollback as you can see from abseil :)
But even given all that, it was fascinating to watch how this system was searching and was able to find particular programs can be further simplified. Kudos to everyone involved, it's a great incremental change that can bring more results in the future.
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Backward compatible implementations of newer standards constructs?
Check out https://abseil.io. It offers absl::optional, which is a backport of std::optional.
What are some alternatives?
raspberry-pi-os - Learning operating system development using Linux kernel and Raspberry Pi
Folly - An open-source C++ library developed and used at Facebook.
dts2hx - Converts TypeScript definition files (d.ts) to haxe externs (.hx) via the TypeScript compiler API
Boost - Super-project for modularized Boost
mdspan - Reference implementation of mdspan targeting C++23
spdlog - Fast C++ logging library.
papers - ISO/IEC JTC1 SC22 WG21 paper scheduling and management
Qt - Qt Base (Core, Gui, Widgets, Network, ...)
CppCoreGuidelines - The C++ Core Guidelines are a set of tried-and-true guidelines, rules, and best practices about coding in C++
EASTL - Obsolete repo, please go to: https://github.com/electronicarts/EASTL
meta
BDE - Basic Development Environment - a set of foundational C++ libraries used at Bloomberg.