gistfile1.txt

fn movearg(i: ~mutable int) {
    let j <- i;
    *j = 200;
}

fn movemode(-i: ~int) {
    let j <- i;
}

fn main() {
    let i = ~mutable 100;
    movearg(i);
    // Still 100. Where was the implicit copy?
    log_err *i;
}