tryvial

A small crate for Ok-wrapping and try blocks. This is compatible with Result, Option, and any type implementing the unstable std::ops::Try trait.

This crate does not require nightly Rust.

Overview

The macro try_fn is used to perform Ok-wrapping on the return value of a function.

Before: rust fn main() -> Result<(), Box<dyn std::error::Error>> { println!("Enter your name: "); let mut name = String::new(); std::io::stdin().read_line(&mut name)?; println!("Hello, {name}!"); Ok(()) // this is ugly }

After: ```rust

[try_fn]

fn main() -> Result<(), Box> { println!("Enter your name: "); let mut name = String::new(); std::io::stdin().read_line(&mut name)?; println!("Hello, {name}!"); } ```

The macro try_block is an implementation of "try blocks" from nightly rust.

rust let result: Result<T, E> = try_block! { let a = do_one(x)?; let b = do_two(a)?; b };

The macro wrap_ok simply wraps an expression with the "ok" variant for a given Try type.

rust assert_eq!(Some(42), wrap_ok!(42));

License

MIT or Apache-2.0