|3 months ago||6 days ago|
|MIT License||GNU General Public License v3.0 or later|
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-🎄- 2021 Day 18 Solutions -🎄-
144 projects | reddit.com/r/adventofcode | 17 Dec 2021
Mostly a mess of pattern matching. I really need to make some generic tree utilities. Haven't been able to find a decent parser combinator that works in Scala 3 (I usually use fastparse which depends heavily on Scala 2 macros, and scala-parser-combinators works in Scala 3, but I've had a lot of trouble getting it to not be too greedy), so I used the state monad from cats to parse at the bottom of the file, which I think turned out fairly nice.
Parser generators vs. handwritten parsers: surveying major languages in 2021
11 projects | news.ycombinator.com | 21 Aug 2021
Agreed! I would say that parser combinators are the sweet spot and the right choice in most cases.
Scala has them as well, e.g.: https://com-lihaoyi.github.io/fastparse/
And the good thing is, you don't have to learn a completely new language/syntax, you can use the host language's syntax and you have full IDE support as well.
We haven't tracked posts mentioning Scopt yet.
Tracking mentions began in Dec 2020.
What are some alternatives?
Scallop - a simple Scala CLI parsing library
Scala Parser Combinators - simple combinator-based parsing for Scala. formerly part of the Scala standard library, now a separate community-maintained module
Parboiled2 - A macro-based PEG parser generator for Scala 2.10+
atto - friendly little parsers
decline - A composable command-line parser for Scala.
Lark - Lark is a parsing toolkit for Python, built with a focus on ergonomics, performance and modularity.