Fast Parse VS decline

Compare Fast Parse vs decline and see what are their differences.

Fast Parse

Writing Fast Parsers Fast in Scala (by lihaoyi)

decline

A composable command-line parser for Scala. (by bkirwi)
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Fast Parse decline
2 2
980 505
0.2% -
4.9 8.6
2 months ago 8 days ago
Scala Scala
MIT License Apache License 2.0
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.

Fast Parse

Posts with mentions or reviews of Fast Parse. We have used some of these posts to build our list of alternatives and similar projects. The last one was on 2021-12-17.
  • -🎄- 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.

decline

Posts with mentions or reviews of decline. We have used some of these posts to build our list of alternatives and similar projects. The last one was on 2021-02-20.

What are some alternatives?

When comparing Fast Parse and decline you can also consider the following projects:

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

Scopt - command line options parsing for Scala

Kaitai Struct - Kaitai Struct: declarative language to generate binary data parsers in C++ / C# / Go / Java / JavaScript / Lua / Perl / PHP / Python / Ruby

zio-cli - Rapidly build powerful command-line applications powered by ZIO

Lark - Lark is a parsing toolkit for Python, built with a focus on ergonomics, performance and modularity.

Scallop - a simple Scala CLI parsing library