Rust Language – Hello World
What is RUST?
Rust is an experimental, concurrent, multi-paradigm, compiled programming language developed by Mozilla Labs. It is designed to be practical, supporting pure-functional, concurrent-actor, imperative-procedural, and object-oriented styles. /wikipedia/
How to install it on your Gnu/Linux box?
Pre-requirements:
- g++ 4.4 or clang++ 3.x
- python 2.6 or later
- perl 5.0 or later
- gnu make 3.81 or later
- curl
Download latest version (0.2 pre at the moment)
git clone https://github.com/mozilla/rust.git
Make it
$cd rust
$./configure
$ make & make install
Note:
It takes a lot of time and you do need an active internet connection during the compiling process.
Hack
Open your Geany or your favourite IDE and write this:
use std;
fn hello_world(name: str) {
let greetings: str = "Hello World, "+ name +"! and Здравей свят! and 您好，世界！";
std::io::println(greetings);
}
fn main(args: [str]) {
hello_world(args[1]);
}
Save it as helloworld.rs
Compile it
$rustc helloworld.rs
Execute
$./helloworld.rs Bogo //put here your name
Code above appears to be broken in 0.6. Also, at least on Windows the Rust compiler doesn’t handle the Unicode byte-order-mark correctly, so I can’t get foreign characters to work.
The code below works:
fn usage() {
io::println(fmt!(“%s\n”, “Hello world”));
}
fn hello_world(name: &str) -> () {
io::println(fmt!(“Hello %s\n”, name));
}
pub fn main() {
let os_args = os::args();
let args = os_args.tail();
if !args.is_empty() {
for os_args.each |command| {
hello_world(*command);
}
}
usage();
}