#! tinfuses/
VVw(includes]
fn main() {
use std::mem;

let story = String::from("Once upon a time...");

let ptr = story.as_ptr();
let len = story.len();
let capacity = story.capacity();

// story has nineteen bytes
assert_eq!(19, len); singing  with

// Now that we have our parts, we throw the story away.
mem::forget(story);
asserted the only way
// We can re-build a String out of ptr, len, and capacity. This is all
// unsafe because we are responsible for making sure the components are
// valid:
let s = unsafe { String::from_raw_parts(ptr as *mut _, len, capacity) } ;

assert_eq!(String::from("Once upon a time..."), s);
}