From 7e8ee5ed9cad6484e9f13f81731b102ced58402e Mon Sep 17 00:00:00 2001 From: Adam Carpenter Date: Tue, 9 Jul 2019 15:14:04 -0400 Subject: Init. --- meap/meap-code/ch9/ch9-clock1/Cargo.toml | 11 +++++++ meap/meap-code/ch9/ch9-clock1/src/main.rs | 53 +++++++++++++++++++++++++++++++ 2 files changed, 64 insertions(+) create mode 100755 meap/meap-code/ch9/ch9-clock1/Cargo.toml create mode 100755 meap/meap-code/ch9/ch9-clock1/src/main.rs (limited to 'meap/meap-code/ch9/ch9-clock1') diff --git a/meap/meap-code/ch9/ch9-clock1/Cargo.toml b/meap/meap-code/ch9/ch9-clock1/Cargo.toml new file mode 100755 index 0000000..34d4928 --- /dev/null +++ b/meap/meap-code/ch9/ch9-clock1/Cargo.toml @@ -0,0 +1,11 @@ +[package] +name = "clock" +version = "0.1.1" +authors = ["Tim McNamara "] + +[dependencies] +chrono = "0.4" +clap = "2" + +[profile.release] +lto = true diff --git a/meap/meap-code/ch9/ch9-clock1/src/main.rs b/meap/meap-code/ch9/ch9-clock1/src/main.rs new file mode 100755 index 0000000..7f3c941 --- /dev/null +++ b/meap/meap-code/ch9/ch9-clock1/src/main.rs @@ -0,0 +1,53 @@ +extern crate chrono; +extern crate clap; + +use clap::{App,Arg}; +use chrono::{DateTime}; // date type +use chrono::{Local}; // timezone types + +struct Clock; + +impl Clock { + fn get() -> DateTime { + Local::now() + } + + fn set() -> ! { + unimplemented!() + } +} + +fn main() { + let app = App::new("clock") + .version("0.1") + .about("Gets and sets (aspirationally) the time.") + .arg(Arg::with_name("action") + .takes_value(true) + .possible_values(&["get", "set"]) + .default_value("get")) + .arg(Arg::with_name("std") + .short("s") + .long("use-standard") + .takes_value(true) + .possible_values(&["rfc2822", "rfc3339", "timestamp"]) + .default_value("rfc3339")) + .arg(Arg::with_name("datetime") + .help("When is 'set', apply . Otherwise, ignore.")); + + let args = app.get_matches(); + + let action = args.value_of("std").unwrap(); // default_value() has been supplied, + let std = args.value_of("std").unwrap(); // so it's safe to use .unwrap() + + if action == "set" { + unimplemented!() // break early + } + + let now = Clock::get(); + match std { + "timestamp" => println!("{}", now.timestamp()), + "rfc2822" => println!("{}", now.to_rfc2822()), + "rfc3339" => println!("{}", now.to_rfc3339()), + _ => unreachable!(), + } +} -- cgit v1.2.3