How do I convert an unsigned integer to an integer in Rust? -

so i'm trying random number, i'd rather not have come uint instead of int... not sure if match right, either, compiler doesn't far because it's never heard of from_uint thing i'm trying do:

fn get_random(max: &int) -> int {         // here use * dereference max         // ...that is, access value @          // pointer location rather         // trying math using actual         // pointer         match int::from_uint(rand::random::<uint>() % *max + 1) {                 some(n) => n,                 none => 0,         } } 

from_uint not in namespace of std::int, std::num: http://doc.rust-lang.org/std/num/fn.from_uint.html

original answer:

cast u32 int as. if cast uint or u64 int, risk overflowing negatives (assuming on 64 bit). docs:

the size of uint equivalent size of pointer on particular architecture in question.

this works:

use std::rand;  fn main() {      let max = 42i;      println!("{}" , get_random(&max));  }  fn get_random(max: &int) -> int {     (rand::random::<u32>() int) % (*max + 1) }