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Diffstat (limited to 'clap/examples/06_positional_args.rs')
| -rw-r--r-- | clap/examples/06_positional_args.rs | 56 |
1 files changed, 0 insertions, 56 deletions
diff --git a/clap/examples/06_positional_args.rs b/clap/examples/06_positional_args.rs deleted file mode 100644 index 1f29612..0000000 --- a/clap/examples/06_positional_args.rs +++ /dev/null @@ -1,56 +0,0 @@ -extern crate clap; - -use clap::{App, Arg}; - -fn main() { - - // Positional arguments are those values after the program name which are not preceded by any - // identifier (such as "myapp some_file"). Positionals support many of the same options as - // flags, as well as a few additional ones. - let matches = App::new("MyApp") - // Regular App configuration goes here... - - // We'll add two positional arguments, a input file, and a config file. - // - // I'll explain each possible setting that "positionals" accept. Keep in - // mind that you DO NOT need to set each of these for every flag, only the - // ones that apply to your individual case. - .arg(Arg::with_name("input") - .help("the input file to use") // Displayed when showing help info - .index(1) // Set the order in which the user must - // specify this argument (Starts at 1) - .requires("config") // Says, "If the user uses "input", 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>) - .required(true) // By default this argument MUST be present - // NOTE: mutual exclusions take precedence over - // required arguments - ) - .arg(Arg::with_name("config") - .help("the config file to use") - .index(2)) // Note, we do not need to specify required(true) - // if we don't want to, because "input" already - // requires "config" - // Note, we also do not need to specify requires("input") - // because requires lists are automatically two-way - - // NOTE: In order to compile this example, comment out conflicts_with() - // because we have not defined an "output" argument. - .get_matches(); - - // We can find out whether or not "input" or "config" were used - if matches.is_present("input") { - println!("An input file was specified"); - } - - // We can also get the values for those arguments - if let Some(in_file) = matches.value_of("input") { - // It's safe to call unwrap() because of the required options we set above - println!("Doing work with {} and {}", in_file, matches.value_of("config").unwrap()); - } - // Continued program logic goes here... -} |