rust/src/test/run-pass/log-knows-the-names-of-variants.rs

enum foo {
  a(uint),
  b(str),
  c,
}

fn main() {
    assert "a(22)" == #fmt["%?", a(22u)];
    assert "b(~\"hi\")" == #fmt["%?", b("hi")];
    assert "c" == #fmt["%?", c];
}