Removes need for beta or nightly toolchain.

Previously, it was using 'edition = "2018"' in the manifest, which
enabled nifty new features like "not having to say 'extern crate'". See
https://rust-lang-nursery.github.io/edition-guide/editions/index.html.

Cargo.lock

@@ -89,7 +89,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "randical"
-version = "0.1.0"
+version = "0.1.1"
 dependencies = [
  "clap 2.32.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand 0.5.5 (registry+https://github.com/rust-lang/crates.io-index)",

Cargo.toml

@@ -1,8 +1,7 @@
 [package]
 name = "randical"
-version = "0.1.0"
+version = "0.1.1"
 authors = ["Joe Ardent <code@ardent.nebcorp.com>"]
-edition = "2018"
 
 description = "A simple UNIX commandline utility to generate sequences of random values of different types."
 

src/main.rs

@@ -1,10 +1,13 @@
+extern crate clap;
+extern crate rand;
+
 use std::process::exit;
 
 use clap::{App, Arg, ArgMatches};
 
 use rand::prelude::*;
 
-const VERSION: &'static str = "1";
+const VERSION: &str = "1";
 const DEFAULT_NUM_VALS: usize = 1;
 
 fn get_args() -> ArgMatches<'static> {
@@ -38,23 +41,18 @@ fn get_args() -> ArgMatches<'static> {
 }
 
 fn print_bool(b: &mut ThreadRng) {
-    let t: usize;
+    let t = if b.gen() { 1 } else { 0 };
-    if b.gen() {
-        t = 1;
-    } else {
-        t = 0;
-    }
     println!("{}", t);
 }
 
-fn get_generator(args: &ArgMatches) -> Box<FnMut() -> ()> {
+fn get_generator(args: &ArgMatches) -> Box<dyn FnMut() -> ()> {
     let mut rng = thread_rng();
 
     match args.value_of("TYPE").unwrap_or("b") {
-        "f" => return Box::new(move || println!("{}", rng.gen::<f64>())),
+        "f" => Box::new(move || println!("{}", rng.gen::<f64>())),
-        "u" => return Box::new(move || println!("{}", rng.gen::<u64>())),
+        "u" => Box::new(move || println!("{}", rng.gen::<u64>())),
-        "s" => return Box::new(move || println!("{}", rng.gen::<i64>())),
+        "s" => Box::new(move || println!("{}", rng.gen::<i64>())),
-        _ => return Box::new(move || print_bool(&mut rng)),
+        _ => Box::new(move || print_bool(&mut rng)),
     }
 }
 
@@ -68,12 +66,10 @@ fn main() {
             .unwrap()
             .parse()
             .unwrap_or(DEFAULT_NUM_VALS)
-    } else {
+    } else if do_exit {
-        if do_exit {
         0
     } else {
         DEFAULT_NUM_VALS
-        }
     };
 
     let mut gen = get_generator(&args);