A repo which serves as a learning ground for the Nom crate.

Related tags

Parsing rust nom
Overview

Fun with Nom

This repo is created as a learning resource for the Nom crate for Rust. Nom is a parser combinators library. It can be used to parse just about anything, text, binary, whatever.

Right now, there isn't much to this project, but it will grow over time. I've spent the last week deep diving into this crate, mostly due to the desire to solve Day 6 of the Shuttle Christmas Code Hunt challenge (now called Shuttlings)

Concepts

Coming Soon...

Where I'm At

I understand how to compose the simple building block parsers.

Challenges to Overcome

I'm beginning to understand combinators. There is now a /count endpoint which accepts a plain text string of any length. The endpoint responds with the word count. Nom is leveraged here via calling a parser which returns the text input as a vector of words. The .len() method is then called to get the word count.

Nom Resources

I feel I've "reached the end of the internet" on what folks have written about regarding this crate. There just isn't that much out there. You have to be careful because much of the content is outdated. Better articles are:

Hand Crafting a Parser

It's worth knowing how to do this. I'm all hot to trot about Nom, but I think a good chunk of the issues I'm having stem from not knowing the basics.

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Comments
  • improvement: finish /count endpoint and associated parser

    improvement: finish /count endpoint and associated parser

    The /count endpoint is now complete. It demonstrates use of the separated_pair Nom combinator, which breaks the words of a sentence apart and saves them in a vector, the length of which gives the word count.

    opened by sentinel1909 0
  • improvement: add count endpoint

    improvement: add count endpoint

    Added a /count endpoint, which will eventually take a plain text input, invoke a parsing function, and return the word count. Right now the /count endpoint accepts plain text input and echos it back in JSON format.

    opened by sentinel1909 0
Releases(v0.4.0)

  • v0.4.0(Feb 20, 2024)

    Changelog:

    • remove unwrap from parse function in /count endpoint
    • the nom::Error that comes off is mapped to an Actix Web internal server error and sent as a 500 Internal Server Error HTTP response
    Source code(tar.gz)
    Source code(zip)

  • v0.3.0(Feb 19, 2024)

    Changelog:

    • added parser crate which demonstrates building up a simple parser/combinator function
    • completed the /count endpoint such that it returns the word count of a plain text request body
    Source code(tar.gz)
    Source code(zip)

  • v0.2.0(Feb 18, 2024)

  • v0.1.0(Feb 18, 2024)

Owner
Jeff Mitchell
Self-taught developer, all-around IT generalist and junkie.
Jeff Mitchell
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