contain 0.5.1

A crate for defining/extending lifetimes
Documentation 
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#[cfg(feature = "dedup")]
use contain::DeduplicatingContainer;

#[cfg(feature = "dedup")]
fn append_thing<'a>(container: &'a DeduplicatingContainer<'_, String>, s: &str) -> &'a str {
    container.put(format!("{}thing", s))
}

#[cfg(feature = "dedup")]
fn main() {
    let container = DeduplicatingContainer::new();
    let a = append_thing(&container, "some");
    let b = append_thing(&container, "a ");
    let c = append_thing(&container, "some");

    assert_eq!(a, "something");
    assert_eq!(b, "a thing");
    assert_eq!(c, "something");
    assert_eq!(container.count(), 2);
}

#[cfg(not(feature = "dedup"))]
fn main() {
    eprintln!(
        "Enable the dedup feature: cargo run --example deduplicating_container --features dedup"
    );
}