Function getopts::optopt
pub fn optopt(short_name: &str, long_name: &str, desc: &str, hint: &str) -> OptGroup
Create a long option that is optional and takes an argument.
pub fn optopt(short_name: &str, long_name: &str, desc: &str, hint: &str) -> OptGroup
Create a long option that is optional and takes an argument.
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).