logos
Create ridiculously fast Lexers (by maciejhirsz)
rust-peg
Parsing Expression Grammar (PEG) parser generator for Rust (by kevinmehall)
Our great sponsors
logos | rust-peg | |
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15 | 10 | |
2,627 | 1,390 | |
- | - | |
8.3 | 3.6 | |
21 days ago | 5 days ago | |
Rust | Rust | |
Apache License 2.0 | MIT License |
The number of mentions indicates the total number of mentions that we've tracked plus the number of user suggested alternatives.
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.
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.
logos
Posts with mentions or reviews of logos.
We have used some of these posts to build our list of alternatives
and similar projects. The last one was on 2023-07-11.
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Beating the fastest lexer generator in Rust
This is mighty impressive! I've been trying to get some motivation for the mythical rewrite of the proc macro in Logos, and this might just do it for me :D. I'll have a proper look later today and see if any of your findings have something that can be generalized. Also really surprised to see aarch64 doing better than x86_64 since the latter is what I've been optimizing for!
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Letlang — Roadblocks and how to overcome them - My programming language targeting Rust
Rust is a very nice langage for implementing compilers, and has a nice ecosystem for it (logos, rust-peg, lalrpop, astmaker -- this one is mine --, etc...).
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loxcraft: a compiler, language server, and online playground for the Lox programming language
rust-langdev has a lot of libraries for building compilers in Rust. Perhaps you could use these to make your implementation easier, and revisit it later if you want to build things from scratch. I'd suggest logos for lexing, LALRPOP / chumsky for parsing, and rust-gc for garbage collection.
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Logos 0.13 released
Thanks! For compile times you might find the CLI version that Andrew Hickman contributed useful, it's undocumented still mostly I fear but shouldn't be hard to use, see original PR: https://github.com/maciejhirsz/logos/pull/248
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Should I revisit my choice to use nom?
For my lexer generation purposes, I tend to use https://github.com/maciejhirsz/logos, as it not only generates an easy to use lazy lexer, but the result is also exceptionally fast!
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Position in rowan
Hi, I'm using rowan to create a parser and want to print more useful error messages with position in the text/file. I'm using logos (https://crates.io/crates/logos) to generate the lexer. Is there a way to get the starting and ending positions of a SyntaxToken? If not I thought of adding my own wrapper struct around the SyntaxTokens.
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Hey Rustaceans! Got a question? Ask here (6/2023)!
Is there a way for a lexer created with the logos crate (https://crates.io/crates/logos) to get the starting and ending positions for the tokens?
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Best resources for a rust interpreter?
I wouldn't recommend Logos at this point. This recent bug is quite nasty and seems easy to hit, and the maintainer is unresponsive. Last commit was half a year ago. At this point I consider Logos abandonware, though it would be great if its development continued, or if it were forked.
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Alternatives for "blazingly fast"
logos uses "ridiculously fast".
- Compiler in Rust
rust-peg
Posts with mentions or reviews of rust-peg.
We have used some of these posts to build our list of alternatives
and similar projects. The last one was on 2023-12-06.
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nom > regex
And some related parser tools: - https://github.com/kevinmehall/rust-peg - https://github.com/pest-parser/pest - https://github.com/lalrpop/lalrpop
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Letlang — Roadblocks and how to overcome them - My programming language targeting Rust
Rust is a very nice langage for implementing compilers, and has a nice ecosystem for it (logos, rust-peg, lalrpop, astmaker -- this one is mine --, etc...).
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Is there a parsing library (lexer?) which can handle generic tokens?
My peg crate is a parser generator that supports arbitrary token types as input. See https://github.com/kevinmehall/rust-peg/blob/master/tests/run-pass/tokens.rs for an example.
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Hey Rustaceans! Got a question? Ask here! (51/2022)!
The one rust parser-generator I used is PEG
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Hey Rustaceans! Got a question? Ask here! (29/2022)!
The two parser generators that I am aware of are lalrpop and PEG. There both great, and have seen some use by languages that have been written in Rust.
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Domain Specific Language embedded in Rust
rust-peg
- One Letter Programming Languages
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Using Nom - a parser combinator library
I wanted to create a parser for Apertium Stream. In 2014, I used Whittle in Ruby. If this year were 2001, I would use Lex/Yacc. Anyway, this year is 2021. I wanted to create this parser in Rust. I tried to find what is similar to Lex/Yacc. I found Rust-Peg. I found a link to Nom from Rust-Peg's document. My first impression was Nom example is easy to read. At least, its document claimed Nom is fast.
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Hey Rustaceans! Got an easy question? Ask here (5/2021)!
The peg crate has a resolved issue about this.
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Rust is the second most used language for Advent of Code, after Python
I don't really know that much about parsing and grammars, other than what I've learned about regular languages and expressions and context-free languages in a standard Theory of Comp course from my university. I basically just learned peg by reading the Wikipedia article on PEGs, reading the crate documentation to understand the syntax, and then looking at some of the peg examples on their GitHub to understand how it works in practice.
What are some alternatives?
When comparing logos and rust-peg you can also consider the following projects:
foundation.rust-lang.org - website for Rust Foundation
pest - The Elegant Parser
schema-registry - Confluent Schema Registry for Kafka
nom - Rust parser combinator framework
book - The Rust Programming Language
lalrpop - LR(1) parser generator for Rust
lexgen - A fully-featured lexer generator, implemented as a proc macro
chomp - A fast monadic-style parser combinator designed to work on stable Rust.
sonyflake-rs - 🃏 A distributed unique ID generator inspired by Twitter's Snowflake.
rust-bison-skeleton - Bison frontend for Rust
hush - Hush is a unix shell based on the Lua programming language
pom - PEG parser combinators using operator overloading without macros.