https://github.com/softprops/recap

deserialize typed structures from regex captures
https://github.com/softprops/recap

regex serde

Last synced: about 2 months ago
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deserialize typed structures from regex captures

• Host: GitHub
• URL: https://github.com/softprops/recap
• Owner: softprops
• License: mit
• Created: 2019-04-14T18:47:18.000Z (over 5 years ago)
• Default Branch: master
• Last Pushed: 2023-12-28T01:18:27.000Z (9 months ago)
• Last Synced: 2024-07-24T22:04:57.019Z (2 months ago)
• Topics: regex, serde
• Language: Rust
• Size: 2.34 MB
• Stars: 165
• Watchers: 5
• Forks: 12
• Open Issues: 5
• Metadata Files:
  • Readme: README.md
  • Changelog: CHANGELOG.md
  • License: LICENSE

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README

        
# recap [![Main](https://github.com/softprops/recap/actions/workflows/main.yml/badge.svg)](https://github.com/softprops/recap/actions/workflows/main.yml) [![Software License](https://img.shields.io/badge/license-MIT-brightgreen.svg)](LICENSE) [![crates.io](https://img.shields.io/crates/v/recap.svg)](https://crates.io/crates/recap) [![Released API docs](https://docs.rs/recap/badge.svg)](http://docs.rs/recap) [![Master API docs](https://img.shields.io/badge/docs-master-green.svg)](https://softprops.github.io/recap)

> deserialize named capture groups into typesafe structs

Recap is provides what [envy](https://crates.io/crates/envy) provides for environment variables, for[ named capture groups](https://www.regular-expressions.info/named.html). Named regex capture groups are like any other regex capture group but have the extra property that they are associated with name. i.e `(?Psome-pattern)`

## 🤔 who is this for

You may find this crate useful for cases where your application needs to extract information from string input provided by a third party that has a loosely structured format.

A common usecase for this is when you are dealing with log file data that was not stored in a particular structured format like JSON, but rather in a format that can be represented with a pattern.

You may also find this useful parsing other loosely formatted data patterns.

This crate would be less appropriate for cases where your input is provided in a more structured format, like JSON.

I recommend using a crate like [`serde-json`](https://crates.io/crates/serde_json) for those cases instead.

## 📦 install

Add the following to your `Cargo.toml` file.

```toml

[dependencies]

recap = "0.1"

```

## 🤸 usage

A typical recap usage looks like the following. Assuming your Rust program looks something like this...

> 💡 These examples use Serde's [derive feature](https://serde.rs/derive.html)

```rust

use recap::Recap;

use serde::Deserialize;

use std::error::Error;

#[derive(Debug, Deserialize, Recap)]

#[recap(regex = r#"(?x)

    (?P\d+)

    \s+

    (?Ptrue|false)

    \s+

    (?P\S+)

  "#)]

struct LogEntry {

    foo: usize,

    bar: bool,

    baz: String,

}

fn main() -> Result<(), Box> {

    let logs = r#"1 true hello

  2 false world"#;

    for line in logs.lines() {

        let entry: LogEntry = line.parse()?;

        println!("{:#?}", entry);

    }

    Ok(())

}

```

> 👭 Consider this crate a cousin of [envy](https://github.com/softprops/envy), a crate for deserializing environment variables into typesafe structs.

Doug Tangren (softprops) 2019