29 lines
718 B
Rust
29 lines
718 B
Rust
//! How to add `no-thing` flag which is `true` by default and
|
|
//! `false` if passed.
|
|
//!
|
|
//! Running this example with --help prints this message:
|
|
//! -----------------------------------------------------
|
|
//! structopt 0.3.25
|
|
//!
|
|
//! USAGE:
|
|
//! negative_flag [FLAGS]
|
|
//!
|
|
//! FLAGS:
|
|
//! -h, --help Prints help information
|
|
//! -V, --version Prints version information
|
|
//! --no-verbose
|
|
//! -----------------------------------------------------
|
|
|
|
use structopt::StructOpt;
|
|
|
|
#[derive(Debug, StructOpt)]
|
|
struct Opt {
|
|
#[structopt(long = "no-verbose", parse(from_flag = std::ops::Not::not))]
|
|
verbose: bool,
|
|
}
|
|
|
|
fn main() {
|
|
let cmd = Opt::from_args();
|
|
println!("{:#?}", cmd);
|
|
}
|