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This post is auto-generated from RSS feed The Rust Programming Language Forum - Latest topics. Source: I made a crate which allows you to define custom literals like "hello {name}"f

Since literals in Rust can have any suffix, we can use this to create custom literals. Here are some examples

#[culit]
fn main() {
    assert_eq!(100nzusize, NonZeroUsize::new(100).unwrap());
    // COMPILE ERROR!
    // let illegal = 0nzusize;
}

#[culit]
fn main() {
    let name = "bob";
    let age = 23;

    assert_eq!(
        "hi, my name is {name} and I am {age} years old"f,
        format!("hi, my name is {name} and I am {age} years old")
    );
}

#[culit]
fn main() {
    assert_eq!(
        100d + 11h + 8m + 7s,
        Duration::from_secs(100 * 60 * 60 * 24)
        + Duration::from_secs(11 * 60 * 60)
        + Duration::from_secs(8 * 60)
        + Duration::from_secs(7)
    );
}

All of these literals are defined by You, I just export a #[culit] attribute which allows you to use them

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