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Diffstat (limited to 'clap/examples/04_using_matches.rs')
-rw-r--r-- | clap/examples/04_using_matches.rs | 54 |
1 files changed, 0 insertions, 54 deletions
diff --git a/clap/examples/04_using_matches.rs b/clap/examples/04_using_matches.rs deleted file mode 100644 index a0a986f..0000000 --- a/clap/examples/04_using_matches.rs +++ /dev/null @@ -1,54 +0,0 @@ -extern crate clap; - -use clap::{App, Arg}; - -fn main() { - - // Once all App settings (including all arguments) have been set, you call get_matches() which - // parses the string provided by the user, and returns all the valid matches to the ones you - // specified. - // - // You can then query the matches struct to get information about how the user ran the program - // at startup. - // - // For this example, let's assume you created an App which accepts three arguments (plus two - // generated by clap), a flag to display debugging information triggered with "-d" or - // "--debug" as well as an option argument which specifies a custom configuration file to use - // triggered with "-c file" or "--config file" or "--config=file" and finally a positional - // argument which is the input file we want to work with, this will be the only required - // argument. - let matches = App::new("MyApp") - .about("Parses an input file to do awesome things") - .version("1.0") - .author("Kevin K. <kbknapp@gmail.com>") - .arg(Arg::with_name("debug") - .help("turn on debugging information") - .short("d") - .long("debug")) - .arg(Arg::with_name("config") - .help("sets the config file to use") - .short("c") - .long("config")) - .arg(Arg::with_name("input") - .help("the input file to use") - .index(1) - .required(true)) - .get_matches(); - - // We can find out whether or not debugging was turned on - if matches.is_present("debug") { - println!("Debugging is turned on"); - } - - // If we wanted to do some custom initialization based off some configuration file - // provided by the user, we could get the file (A string of the file) - if let Some(file) = matches.value_of("config") { - println!("Using config file: {}", file); - } - - // Because "input" is required we can safely call unwrap() because had the user NOT - // specified a value, clap would have explained the error the user, and exited. - println!("Doing real work with file: {}", matches.value_of("input").unwrap() ); - - // Continued program logic goes here... -} |