clap-nested 0.4.0

Convenient `clap` for CLI apps with multi-level subcommands.
Documentation 
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/// Get filename without extension of the current source file
#[macro_export]
macro_rules! file_stem {
    () => {
        ::std::path::Path::new(file!())
            .file_stem()
            .unwrap()
            .to_str()
            .unwrap()
    };
}

#[test]
fn file_stem() {
    assert!(file_stem!() == "macros");
}