rust/src/test/run-pass/shadow.rs

// -*- rust -*-
fn foo(c: ~[int]) {
    let a: int = 5;
    let mut b: ~[int] = ~[];


    alt none::<int> {
      some::<int>(_) {
        for c.each {|i|
            log(debug, a);
            let a = 17;
            b += ~[a];
        }
      }
      _ { }
    }
}

enum t<T> { none, some(T), }

fn main() { let x = 10; let x = x + 20; assert (x == 30); foo(~[]); }