Crate parse_result

Add parse to Result

The core purpose of this library is to give better ergonomics to parsing from sources which could fail, e.g. reading stdin.

extern crate parse_result;
use parse_result::*;
use std::env;

fn main() {
    // It turns code like this:
    env::var("PORT").map(|s| s.parse().unwrap_or(3000)).unwrap_or(3000);

    // Into this:
    env::var("PORT").parse().unwrap_or(3000);

    // Matching to find the specific failure
    match env::var("PORT").parse::<u32>() {
        Ok(port) => println!("Parsed port {} successfully!", port),
        Err(OriginalErr(e)) => panic!("Failed to get PORT from env: {}", e),
        Err(ParseFailure(e)) => panic!("Failed to parse PORT: {}", e),
    }
}

Reexports

pub use Error::*;

Enums

Error

Represents the possible errors from calling parse on Result.

Traits

ParseResult

Extension trait to add parse to Result.