range-v3
compile-time-regular-expressions
range-v3 | compile-time-regular-expressions | |
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19 | 26 | |
4,015 | 3,163 | |
- | - | |
4.0 | 7.0 | |
9 days ago | 7 days ago | |
C++ | C++ | |
GNU General Public License v3.0 or later | Apache License 2.0 |
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range-v3
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Why are strings and IO so complicated?
std::ranges is in c++20, but you can pull in the library it was based on if you use 17 (https://github.com/ericniebler/range-v3)
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Java Streams in c++
What you are describing seems to be std::ranges. If you’re interested in understanding how to implement it, I recommend checking out the original reference implementation, rangev3. Trying to implement your own ranges framework is really good practice for learning how to do efficient, advanced generic programming in C++. I highly recommend it as a hobby learning project. But it’s also really, really hard to do correctly, so please just use the stdlib and/or rangev3 in any real project.
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What are some of the ways to make a super nasty nested loop become clean?
In C++23, there will be std::views::cartesian_product. It is already available in the range-v3 library, the one that the standard is based on.
- 295 pages on Initialization in Modern C++ :)
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Function composition in modern C++
/** * @brief Forwards value equivalent to the std::forward. * * Using cast instead of std::forward to avoid template instantiation. Used by * Eric Niebler in range library. * * @see https://github.com/ericniebler/range-v3 */
- PocketPy: A Lightweight(~5000 LOC) Python Implementation in C++17
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Is there an <algorithm> way to filter + transform multiple containers at once
It uses a custom zip_iterator (which isn't very good, and you should really use the one from boost or from range-v3).
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what annoys you most while using c++?
It contains very little functionality compared to the Eric Niebler’s reference implementation for my liking. Especially views. This will undoubtedly change in the future. But the point is moot, because they are not really supported the is no other option for now other than https://github.com/ericniebler/range-v3.
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C++20 Ranges Algorithms – 7 Non-Modifying Operations
range-v3 is a great library allowing you to bridge the gap: https://github.com/ericniebler/range-v3
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CXXIter: A chainable c++20 LINQ-like iterator library
[range-v3](https://github.com/ericniebler/range-v3) which std::ranges was based on has the `to>()` which as far as I know is expected to get into c++23 :)
compile-time-regular-expressions
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Why are strings and IO so complicated?
CTRE (https://github.com/hanickadot/compile-time-regular-expressions) ranges::views (filter, transform, etc.) (C++20) str.find() + str.substr() freopen to stdin + cin >> extraction Parser libraries
- Compile time regular expression in C++
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What are thoughts on removing regular expression from the standard library?
There are suggestions that should be replaced by the high performance ctre implementation: https://github.com/hanickadot/compile-time-regular-expressions
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What's the most hilarious use of operator overloading you've seen?
operator"" can be used in a similar way to expression templates (DSLs), where the type of the resulting expression is dependent on the string contents. For example ctre makes use of this to build efficient regular expression parsers, and kumi uses this in conjunction with operator[] to make tuple indexing quite elegant
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It's easy, I swear! Once you learn a bit about it, you'll be amazed!
Check out https://github.com/hanickadot/compile-time-regular-expressions anything is possible 😂
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Verify all characters are same except a few
Yes to regex, no to std::regex. Better to use CTRE. Something like "^Hello [0-9]+ how are you" should allow checking if there's a match
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Constexpr regex parser!
You could compare your implementation with https://github.com/hanickadot/compile-time-regular-expressions and see if there are any ideas you can copy.
- Regex is comically slow. High performance alternatives? (Pattern matching for validation)
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Regex shootout updated - hyperscan 1st, Rust 2nd, std::regex dead last
std::compile_time_regex would be a nice addition. Something similar to ctre https://github.com/hanickadot/compile-time-regular-expressions Simply letting the compiler generate all the regex parsing machinery at compile time.... And benefitting from compiler optimizations, vectorization, etc...
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What are some cool modern libraries you enjoy using?
ctre
What are some alternatives?
Boost.Asio - Asio C++ Library
RE2 - RE2 is a fast, safe, thread-friendly alternative to backtracking regular expression engines like those used in PCRE, Perl, and Python. It is a C++ library.
cppitertools - Implementation of python itertools and builtin iteration functions for C++17
consteval-huffman - Compile-time Huffman coding compression using C++20
CppCoreGuidelines - The C++ Core Guidelines are a set of tried-and-true guidelines, rules, and best practices about coding in C++
xorstr - heavily vectorized c++17 compile time string encryption.
HCSR04 - Arduino library for HC-SR04, HC-SRF05, DYP-ME007, BLJ-ME007Y, JSN-SR04T ultrasonic ranging sensor
neo-fun - Some library components that didn't quite fit anywhere else...
C++ Format - A modern formatting library
cpplinq - LINQ for C++ (cpplinq) is an extensible C++11 library of higher-order functions for range manipulation. cpplinq draws inspiration from LINQ for C#.
staticvec - Implements a fixed-capacity stack-allocated Vec alternative backed by an array, using const generics.