Macro for_all

macro_rules! for_all {
    ($value:expr, $pattern:pat => $result:expr) => { ... };
}

Evaluate the provided expression for both Among::Left and Among::Right.

This macro is useful in cases where both sides of Among can be interacted with in the same way even though the don’t share the same type.

Syntax: among::for_all!( expression , pattern => expression )

Example

use among::Among;
use std::borrow::Cow;

fn length(owned_or_borrowed: Among<String, Cow<'static, str>, &'static str>) -> usize {
    among::for_all!(owned_or_borrowed, s => s.len())
}

fn main() {
    let borrowed = Among::Right("Hello world!");
    let owned = Among::Left("Hello world!".to_owned());
    let mixed = Among::Middle(Cow::Borrowed("Hello world!"));

    assert_eq!(length(borrowed), 12);
    assert_eq!(length(mixed), 12);
    assert_eq!(length(owned), 12);
}