Function getopts::optopt
[−]
[src]
pub fn optopt(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 argument.
short_name
- e.g."h"
for a-h
option, or""
for nonelong_name
- e.g."help"
for a--help
option, or""
for nonedesc
- Description for usage helphint
- Hint that is used in place of the argument in the usage help, e.g."FILE"
for a-o FILE
option