Macro sarkara::rand

macro_rules! rand {
    ( choose $range:expr, $n:expr ) => { ... };
    ( choose $range:expr ) => { ... };
    ( _ ) => { ... };
    ( fill $vec:expr ) => { ... };
    ( bytes $len:expr ) => { ... };
    ( $len:expr ) => { ... };
}

rand macro.

rand!( choose $range, $n )

Randomly choose $n values in $range.

extern crate rand;
#[macro_use] extern crate sarkara;

let mut output = rand!(choose 0..3, 3);
output.sort();
assert_eq!(output, [0, 1, 2]);

rand!( choose $range )

Randomly choose a value in $range.

extern crate rand;
#[macro_use] extern crate sarkara;

let output = rand!(choose 0..3);
assert!([0, 1, 2].contains(&output));

rand!( _ )

Generating a random value, like rand::random().

extern crate rand;
#[macro_use] extern crate sarkara;

let output: u8 = rand!(_);
assert!(std::u8::MIN <= output && std::u8::MAX >= output);

rand!( fill $vec )

fill a slice.

extern crate rand;
#[macro_use] extern crate sarkara;

let mut input = [0; 8];
rand!(fill input);
assert!(input.iter().any(|&b| b != 0));

rand!( bytes $len )

Generate a random [u8; $len].

extern crate rand;
#[macro_use] extern crate sarkara;

let output = rand!(bytes 8);
assert_eq!(output.len(), 8);

rand!( $len )

Generate a random Vec<_>.

extern crate rand;
#[macro_use] extern crate sarkara;

let mut output = rand!(8);
output.push(99);
assert_eq!(output.len(), 9);