try_or

Contains the macros try_or!, try_or_else!, try_opt_or! and try_opt_or_else!. These are helper macros for unwrapping a Result or an Option while returning early for Err and None values. The semantics are similar to unwrap_or and unwrap_or_else.

If you want a try_opt! macro, there's already another crate (try_opt) for that.

Documentation

Usage

Add to your Cargo.toml:

toml [dependencies] try_or = "0.1"

Use the macros like this:

```rust

[macro_use]

extern crate try_or;

fn main() { // test tryor! asserteq!({ || tryor!("5".parse::(), 1) } (), 5); asserteq!({ || try_or!("a".parse::(), 1) } (), 1);

// test try_or_else!
assert_eq!({ || try_or_else!("1".parse::<u32>(), |_| 5) } (), 1);
assert_eq!({ || try_or_else!("a".parse::<u32>(), |_| 5) } (), 5);

// test try_opt_or!
assert_eq!({ || try_opt_or!(Some(1), 2) } (), 1);
assert_eq!({ || try_opt_or!(None, 2) } (), 2);

// test try_or_else!
assert_eq!({ || try_opt_or_else!(Some(1), || 2) } (), 1);
assert_eq!({ || try_opt_or_else!(None, || 2) } (), 2);

} ```