macro_rules! ext_expect { ($cx:expr, $sp:expr, $e:expr, $msg:expr) => {{ match $e { Some(x) => x, None => ext_bail!($cx, $sp, $msg), } }} }
Unwrap the Option $e, or ext_bail!.
Prefix searches with a type followed by a colon (e.g.
fn:) to restrict the search to a given type.
Accepted types are: fn, mod,
struct, enum,
trait, type, macro,
and const.
Search functions by type signature (e.g.
vec -> usize)