#clap
[[®Doc comments]]で書く。
```rust
#[derive(Clap, Debug)]
#[clap(version = "0.1", author = "tadashi-aikawa")]
struct Opts {
/// The path of the config file to load
#[clap(short, long, default_value = ".tatsuwo.yaml")]
config: String,
}
```
`config`パラメータの説明に`The path of the config file to load`が表示される。サブコマンドの説明も同様。
```rust
#[derive(Clap, Debug)]
enum SubCommand {
/// タツヲが吠える
Uho(UhoOpts),
}
```