Rust crate for convenience traits on Option<T> and Result<T, E>.
Has no dependencies, and should work on any Rust release channel.
Three methods are provided, ref_map() for Some(_) and Ok(_), and ref_map_err() for Err(_).
This allows easily mapping borrowed values from maybe values.
use ref_map::*;
let string: Option<String> = Some("hello world\n".into());
// Without ref-map:
// the .as_ref() is necessary because otherwise it tries to consume the String
let message: Option<&str> = string.as_ref().map(|s| s.trim());
// With ref-map:
let message: Option<&str> = string.ref_map(|s| s.trim());ref_map() is also provided for Result<T, E> for Ok, and ref_map_err() for Err.
Copyright (C) 2020-2021 Ammon Smith
Available under the MIT License.