pub fn to_str_radix_special(num: float, radix: uint) -> (~str, bool)
Converts a float to a string in a given radix, and a flag indicating whether it's a special value
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).