compile-time-regular-expressions
constexpr-sql
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| compile-time-regular-expressions | constexpr-sql | |
|---|---|---|
| 26 | 1 | |
| 3,163 | 132 | |
| - | - | |
| 7.0 | 0.0 | |
| 4 days ago | almost 4 years ago | |
| C++ | C++ | |
| Apache License 2.0 | MIT License |
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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
constexpr-sql
What are some alternatives?
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.
optimizing-the-memory-layout-of-std-tuple - Optimizing the memory layout of std::tuple
consteval-huffman - Compile-time Huffman coding compression using C++20
json_struct - json_struct is a single header only C++ library for parsing JSON directly to C++ structs and vice versa
xorstr - heavily vectorized c++17 compile time string encryption.
gcem - A C++ compile-time math library using generalized constant expressions
neo-fun - Some library components that didn't quite fit anywhere else...
sql-parser - SQL Parser for C++. Building C++ object structure from SQL statements.
C++ Format - A modern formatting library
constexpr-8cc - Compile-time C Compiler implemented as C++14 constant expressions
staticvec - Implements a fixed-capacity stack-allocated Vec alternative backed by an array, using const generics.
CppML - A concise and readable metaprogramming language for C++