Lib.rs

match_opt

match_opt is a macro that converts a partial pattern-match into one that returns an Option. This can be used as a shorthand to simplify a complex pattern-match, for which only one or few cases are useful.

For example:

let some_results = vec!["1", "2", "3", "foo", "bar", "4"].map(|v| v.parse::<usize>());
let some_pattern_match = some_results.filter_map{|x| match x {
    Ok(v) if v > 2 => Some(v),
    _ => None,
}};
// this is equivalent to
let alternate_pattern_match = some_results.filter_map{|x| match_opt!(x, OK(v) if v > 2 => v)};

This crate has no dependencies.

Documentation

The API can be found here.

Installation

Add the following line to the dependencies of your Cargo.toml:

match_opt = "0.1.0"

Contributors

The authors of this code is François Garillot (@huitseeker).

License

This project is MIT licensed.