pub fn input_vec_state(files: ~[std::option::Option], f: &fn(&str, FileInputState) -> bool) -> bool
Iterate over a vector of files (an empty vector implies just stdin)
with the current state of the iteration provided at each call.
Fails when attempting to read from a file that can't be opened.
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).