Function getopts::optflagopt [] [src]

pub fn optflagopt(short_name: &str,
                  long_name: &str,
                  desc: &str,
                  hint: &str)
                  -> OptGroup
🔬 This is a nightly-only experimental API. (rustc_private)

use the crates.io getopts library instead

Create a long option that is optional and takes an optional argument.