lexy
compile-time-regular-expressions
lexy | compile-time-regular-expressions | |
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19 | 26 | |
953 | 3,166 | |
- | - | |
7.5 | 7.0 | |
7 days ago | 11 days ago | |
C++ | C++ | |
Boost Software License 1.0 | Apache License 2.0 |
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lexy
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Why are strings and IO so complicated?
lexy (https://lexy.foonathan.net/)
- Show HN: Matcheroni, a tiny C++20 header library for building lexers/parsers
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Koji projekat na Githubu vas je odusevio u zadnje vreme?
https://github.com/foonathan/lexy nakon sto sam se propatio sa errorima od boost spirita, a pegtl mi se nije svidao, ovaj library je dosao kao odusevljenje, a i dokumentacija je iznenadujuce ok
- The Future of Boost by Vinnie Falco
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Simple question on compilers and syntax rules
In general, LALR parser generators are more difficult to work with than RD parser combinators. Instead of flex and bison, I'd recommend checking out Boost.Spirit or lexy.
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A simple library for compile-time string matching.
This might be closer: https://github.com/foonathan/lexy
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Any good parser combinator libraries for C++?
Lexy: https://lexy.foonathan.net/
- Show HN: Lexy – C++ parser combinator library with custom DSL
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How often do you use these keywords ?
lexy has something like std::bind with a way to specify fallback values for the placeholders if the arguments aren't provided: lexy::_1.or_default(fallback)
- Lexy: C++ Parsing DSL Library
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?
PEGTL - Parsing Expression Grammar Template 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.
parser-demo - Good source layout with Flex and Bison
consteval-huffman - Compile-time Huffman coding compression using C++20
gadgetron - Gadgetron - Medical Image Reconstruction Framework
xorstr - heavily vectorized c++17 compile time string encryption.
json_struct - json_struct is a single header only C++ library for parsing JSON directly to C++ structs and vice versa
neo-fun - Some library components that didn't quite fit anywhere else...
masala-parser - Javascript Generalized Parser Combinators
C++ Format - A modern formatting library
daw_json_link - Fast, convenient JSON serialization and parsing in C++
staticvec - Implements a fixed-capacity stack-allocated Vec alternative backed by an array, using const generics.