read
abseil-cpp
read | abseil-cpp | |
---|---|---|
12 | 54 | |
54 | 13,955 | |
- | 1.3% | |
0.0 | 9.5 | |
10 months ago | 5 days ago | |
C++ | C++ | |
GNU General Public License v3.0 only | Apache License 2.0 |
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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.
read
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C++ And Beyond: Discussion - Vittorio Romeo, Kevlin Henney, Nico Josuttis & Kate Gregory - ACCU 2023
It was on the mailing list that screens proposals prior to writing papers. Basically it was for making input much easier to work with, like this: https://github.com/ShakaUVM/read
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The Future of Boost by Vinnie Falco
I have thought about submitting a library of mine (https://github.com/ShakaUVM/read) for standardization or inclusion in Boost. Basically it does for input what format did for output - replace the stream system with something more functional.
- Keep getting a loop when I enter a letter instead of a number.
- What are some cool modern libraries you enjoy using?
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Read a string from user
Using readlib:
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Steams operations order?
That's why I wrote my read library (https://github.com/ShakaUVM/read). You can just do:
- Why is my program skipping a cin input?
- Why am I able to capture data from text file with std::ifstream with either std::getline or extraction operator >> but not unable to do so by going back and forth between the two??
- std::cin doesn't work after entering the wrong input
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What (relatively) easily to implement features would you like to see in c++23.
5) Make input come from functions rather than call by reference, such as what I did here: https://github.com/ShakaUVM/read
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?
frozen - a header-only, constexpr alternative to gperf for C++14 users
Folly - An open-source C++ library developed and used at Facebook.
Boost - Super-project for modularized Boost
rust - Empowering everyone to build reliable and efficient software.
spdlog - Fast C++ logging library.
PEGTL - Parsing Expression Grammar Template Library
Qt - Qt Base (Core, Gui, Widgets, Network, ...)
stb - stb single-file public domain libraries for C/C++
EASTL - Obsolete repo, please go to: https://github.com/electronicarts/EASTL
Allegro - The official Allegro 5 git repository. Pull requests welcome!
BDE - Basic Development Environment - a set of foundational C++ libraries used at Bloomberg.