pub fn from_fn(len: uint, f: &fn(index: uint) -> bool) -> Bitv
Create a bitv of the specified length where the value at each index is f(index).
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 (or str), enum,
trait, typedef (or
tdef).