rune 0.14.1

The Rune Language, an embeddable dynamic programming language for Rust.
Documentation 
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// This ensures that unary operations do not clobber a slot.
// https://github.com/rune-rs/rune/issues/838

#[test]
fn negation_simple() {
    let b = -1;
    let d = 0 + -b;
    assert_eq!(d, 1);
    assert_eq!(b, -1);
}

#[test]
fn negation_simple_chain() {
    let b = -1;
    let d = 0 + -b;
    d = 0 + -b;
    d = 0 + -b;
    d = 0 + -b;
    assert_eq!(d, 1);
    assert_eq!(b, -1);
}

#[test]
fn negation() {
    let a = 1;
    let b = -2;
    let c = -b;
    let d = 1 < -b;
    let e = 1 < -b;

    assert!(d);
    assert!(e);
    assert_eq!(a, 1);
    assert_eq!(b, -2);
    assert_eq!(c, 2);
}