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Diffstat (limited to 'clap/examples/05_flag_args.rs')
| -rw-r--r-- | clap/examples/05_flag_args.rs | 56 |
1 files changed, 0 insertions, 56 deletions
diff --git a/clap/examples/05_flag_args.rs b/clap/examples/05_flag_args.rs deleted file mode 100644 index a6b8945..0000000 --- a/clap/examples/05_flag_args.rs +++ /dev/null @@ -1,56 +0,0 @@ -extern crate clap; - -use clap::{App, Arg}; - -fn main() { - - // Of the three argument types, flags are the most simple. Flags are simple switches which can - // be either "on" or "off" - // - // clap also supports multiple occurrences of flags, the common example is "verbosity" where a - // user could want a little information with "-v" or tons of information with "-v -v" or "-vv" - let matches = App::new("MyApp") - // Regular App configuration goes here... - - // We'll add a flag that represents an awesome meter... - // - // I'll explain each possible setting that "flags" accept. Keep in mind - // that you DO NOT need to set each of these for every flag, only the ones - // you want for your individual case. - .arg(Arg::with_name("awesome") - .help("turns up the awesome") // Displayed when showing help info - .short("a") // Trigger this arg with "-a" - .long("awesome") // Trigger this arg with "--awesome" - .multiple(true) // This flag should allow multiple - // occurrences such as "-aaa" or "-a -a" - .requires("config") // Says, "If the user uses -a, they MUST - // also use this other 'config' arg too" - // Can also specify a list using - // requires_all(Vec<&str>) - .conflicts_with("output") // Opposite of requires(), says "if the - // user uses -a, they CANNOT use 'output'" - // also has a conflicts_with_all(Vec<&str>) - ) - // NOTE: In order to compile this example, comment out requires() and - // conflicts_with() because we have not defined an "output" or "config" - // argument. - .get_matches(); - - // We can find out whether or not awesome was used - if matches.is_present("awesome") { - println!("Awesomeness is turned on"); - } - - // If we set the multiple() option of a flag we can check how many times the user specified - // - // Note: if we did not specify the multiple() option, and the user used "awesome" we would get - // a 1 (no matter how many times they actually used it), or a 0 if they didn't use it at all - match matches.occurrences_of("awesome") { - 0 => println!("Nothing is awesome"), - 1 => println!("Some things are awesome"), - 2 => println!("Lots of things are awesome"), - 3 | _ => println!("EVERYTHING is awesome!"), - } - - // Continued program logic goes here... -} |