rune 0.14.1

The Rune Language, an embeddable dynamic programming language for Rust.
Documentation 
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#[test]
fn instance_basic_self() {
    struct Foo {
        value,
    }

    impl Foo {
        fn inc(self) {
            self.value += 1;
        }
    }

    let foo = Foo { value: 42 };
    assert_eq!(foo.value, 42);
    foo.inc();
    assert_eq!(foo.value, 43);
}

#[test]
fn instance_chaining() {
    struct Foo {
        value,
    }

    impl Foo {
        fn inc(self) {
            self.value += 1;
            self
        }
    }

    let foo = Foo { value: 42 };
    assert_eq!(foo.inc().inc().inc().value, 45);
}