parser
parser-combinators
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parser | parser-combinators | |
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4 | 1 | |
5 | 6 | |
- | - | |
6.6 | 3.4 | |
17 days ago | about 1 year ago | |
TypeScript | TypeScript | |
MIT License | - |
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parser
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Ramda: A practical functional library for JavaScript programmers
I find straight forward, dedicated combinators much more readable and practical to use ie. for iterables (context where it makes a lot of sense) [0] example [1], runtime assertions (through refutations, which are much faster than combinators over assertions) [2], parser combinators for smallish grammars [3] etc.
In many cases vanilla/imperative js is more readable and terse, no need to bring functional fanaticism everywhere, just in places where it gives true benefits and in form that can be understood by peers.
Functional code can be beautiful and can also be unreadable/undebugable. Same with imperative code. It's great in js/ts you can pick approach where the problem is expressed more naturally and mix it at will.
[0] https://github.com/preludejs/generator
[1] https://observablehq.com/@mirek/project-euler
[2] https://github.com/preludejs/refute
[3] https://github.com/preludejs/parser
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Parsing Text with Nom
Parser combinators are great, we're using parser combinators in production, they are great ie. for typescript [0].
[0] https://github.com/preludejs/parser
- Parser Combinators in Haskell
- Casual Parsing in JavaScript
parser-combinators
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Casual Parsing in JavaScript
Parser combinators [0] are great for quick parsing, usage from typescript is very neat. You can collapse tokenisation, parsing and some evaluation for simple grammars (they appear in production from time to time) into single parser combinator phase (there’s nothing else) where you get desired, typed result.
[0] https://github.com/appliedblockchain/parser-combinators
What are some alternatives?
instaparse
pyparsing - Python library for creating PEG parsers
three-pass-compiler - Solution to the Three Pass Compiler kata on CodeWars, parsing and manipulating a very simple AST
assert-combinators - Functional assertion combinators.
yieldparser - Parse using JavaScript generator functions — it’s like components but for parsing!
umbrella - ⛱ Broadly scoped ecosystem & mono-repository of 192 TypeScript projects (and 157 examples) for general purpose, functional, data driven development
angstrom - Parser combinators built for speed and memory efficiency
httpaf - A high performance, memory efficient, and scalable web server written in OCaml
ocaml-h2 - An HTTP/2 implementation written in pure OCaml
retro-httpaf-bench - Benchmarking environment for http servers