macro_rules! _tt_as_expr_hack( ($value:expr) => ($value) );
Work around "error: unexpected token: an interpolated tt", whatever that means.
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, typedef (or
tdef).
Search functions by type signature (e.g.
vec -> usize)