Rust keywords to macros

gistfile1.txt

fn main() {
    macro_rules! log_(
        ($lvl:expr, $msg:expr) => (
            log($lvl, $msg)
        );
    );

    macro_rules! assert_(
        ($pred:expr) => (
            assert $pred
        );
    );

    macro_rules! fail_(
        ($(e:expr)*) => (
            fail $($e)*
        );
    );

    log_!(error, "test");

    assert_!(true);

    assert_!(do task::try {
        assert_!(true == false);
    }.is_err());

    do task::try {
        fail_!()
    }

    do task::try {
        fail_!(~"hey")
    }
}