Scallop
Fast Parse
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| Scallop | Fast Parse | |
|---|---|---|
| 1 | 4 | |
| 671 | 1,072 | |
| 0.3% | 0.4% | |
| 5.3 | 4.0 | |
| about 1 month ago | 2 months ago | |
| Scala | Scala | |
| MIT License | MIT License |
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Scallop
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Recommended CLI parsing libraries
Scallop is great -- it allows you to wrap entire functions and routines inside calls which pass arguments (like --name) and use them.
Fast Parse
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How do I remove the forward reference error in my parser? (20 lines)
Perhaps use Li Haoyi's fastparse instead? https://github.com/com-lihaoyi/fastparse
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-🎄- 2021 Day 18 Solutions -🎄-
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.
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Parser generators vs. handwritten parsers: surveying major languages in 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.
What are some alternatives?
Scopt - command line options parsing for Scala
Parboiled2 - A macro-based PEG parser generator for Scala 2.10+
Scala Parser Combinators - simple combinator-based parsing for Scala. formerly part of the Scala standard library, now a separate community-maintained module
atto - friendly little parsers
Kaitai Struct - Kaitai Struct: declarative language to generate binary data parsers in C++ / C# / Go / Java / JavaScript / Lua / Nim / Perl / PHP / Python / Ruby
decline - A composable command-line parser for Scala.
CLIST - Command Line Interface Scala Toolkit