fn behavior(matches: &ArgMatches) -> Result<Behavior, i32> {
    let main_function = if matches.is_present("directory") {
        MainFunction::Directory
    } else {
        MainFunction::Standard
    };

    let considering_dir: bool = MainFunction::Directory == main_function;

    let specified_mode: Option<u32> = if matches.is_present(OPT_MODE) {
        match matches.value_of(OPT_MODE) {
            Some(x) => match mode::parse(&x[..], considering_dir) {
                Ok(y) => Some(y),
                Err(err) => {
                    show_error!("Invalid mode string: {}", err);
                    return Err(1);
                }
            },
            None => {
                show_error!(
                    "option '--mode' requires an argument\n \
                     Try '{} --help' for more information.",
                    executable!()
                );
                return Err(1);
            }
        }
    } else {
        None
    };

    let backup_suffix = if matches.is_present(OPT_SUFFIX) {
        match matches.value_of(OPT_SUFFIX) {
            Some(x) => x,
            None => {
                show_error!(
                    "option '--suffix' requires an argument\n\
                     Try '{} --help' for more information.",
                    executable!()
                );
                return Err(1);
            }
        }
    } else {
        "~"
    };

    Ok(Behavior {
        main_function,
        specified_mode,
        suffix: backup_suffix.to_string(),
        verbose: matches.is_present(OPT_VERBOSE),
    })
}
/// Determine behavior, given command line arguments.
///
/// If successful, returns a filled-out Behavior struct.
///
/// # Errors
///
/// In event of failure, returns an integer intended as a program return code.
///
Determine behavior, given command line arguments.
If successful, returns a filled-out Behavior struct.
Determine behavior given command line arguments . If successful returns a filled - out Behavior struct .
fn behavior(matches: &ArgMatches) -> Result<Behavior, i32> {
    let main_function = if matches.is_present("directory") {
        MainFunction::Directory
    } else {
        MainFunction::Standard
    };
    let considering_dir: bool = MainFunction::Directory == main_function;
    let specified_mode: Option<u32> = if matches.is_present(OPT_MODE) {
        match matches.value_of(OPT_MODE) {
            Some(x) => match mode::parse(&x[..], considering_dir) {
                Ok(y) => Some(y),
                Err(err) => {
                    show_error!("Invalid mode string: {}", err);
                    return Err(1);
                }
            },
            None => {
                show_error!(
                    "option '--mode' requires an argument\n \
                     Try '{} --help' for more information.",
                    executable!()
                );
                return Err(1);
            }
        }
    } else {
        None
    };
    let backup_suffix = if matches.is_present(OPT_SUFFIX) {
        match matches.value_of(OPT_SUFFIX) {
            Some(x) => x,
            None => {
                show_error!(
                    "option '--suffix' requires an argument\n\
                     Try '{} --help' for more information.",
                    executable!()
                );
                return Err(1);
            }
        }
    } else {
        "~"
    };
    Ok(Behavior {
        main_function,
        specified_mode,
        suffix: backup_suffix.to_string(),
        verbose: matches.is_present(OPT_VERBOSE),
    })
}
fn behavior ( matches : & ArgMatches ) -> Result < Behavior , i32 > { let main_function = if matches . is_present ( " " ) { MainFunction :: Directory } else { MainFunction :: Standard } ; let considering_dir : bool = MainFunction :: Directory == main_function ; let specified_mode : Option < u32 > = if matches . is_present ( OPT_MODE ) { match matches . value_of ( OPT_MODE ) { Some ( x ) => match mode :: parse ( & x [ .. ] , considering_dir ) { Ok ( y ) => Some ( y ) , Err ( err ) => { show_error ! ( " " err ) ; return Err ( 1 ) ; } } , None => { show_error ! ( " \n \
 " executable ( ) ) ; return Err ( 1 ) ; } } } else { None } ; let backup_suffix = if matches . is_present ( OPT_SUFFIX ) { match matches . value_of ( OPT_SUFFIX ) { Some ( x ) => x , None => { show_error ! ( " \n \
 " executable ( ) ) ; return Err ( 1 ) ; } } } else { " " } ; Ok ( Behavior { main_function , specified_mode , suffix : backup_suffix . to_string ( ) , verbose : matches . is_present ( OPT_VERBOSE ) , } ) }
Determine behavior, given command line arguments.
Determine behavior given command line arguments .
matches
&ArgMatches
matches
&ArgMatches
errors
In event of failure, returns an integer intended as a program return code.
In event of failure returns an integer intended as a program return code .