#![feature(try_reserve)]
use std::collections::CollectionAllocErr;

fn allocate_byte_array(len: usize) -> Result<Vec<u8>, CollectionAllocErr> {
    let mut v = Vec::new();
    v.try_reserve(len)?;
	unsafe {
	    v.set_len(len);
	}
	Ok(v)
}

fn main() {
    let mut v = allocate_byte_array(1024*1024*1024*100).unwrap();
    println!("size {}", v.len());
    let mut i = 1024*1024+5;
    v[i] = 3;
    println!("byte #{} is {}", i, v[i]);
    i = 1024*1024*1024*100-1;
    println!("byte #{} is {}", i, v[i]);
}