rust/tests/ui/drop_forget_copy.rs

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2017-09-18 12:47:33 +02:00
#![warn(drop_copy, forget_copy)]
#![allow(toplevel_ref_arg, drop_ref, forget_ref, unused_mut)]
use std::mem::{drop, forget};
use std::vec::Vec;
#[derive(Copy, Clone)]
struct SomeStruct {
}
struct AnotherStruct {
x: u8,
y: u8,
z: Vec<u8>
}
impl Clone for AnotherStruct {
fn clone(& self) -> AnotherStruct {
AnotherStruct{x: self.x, y: self.y, z: self.z.clone()}
}
}
fn main() {
let s1 = SomeStruct {};
let s2 = s1;
let s3 = &s1;
let mut s4 = s1;
let ref s5 = s1;
drop(s1);
drop(s2);
drop(s3);
drop(s4);
drop(s5);
forget(s1);
forget(s2);
forget(s3);
forget(s4);
forget(s5);
let a1 = AnotherStruct {x: 255, y: 0, z: vec![1, 2, 3]};
let a2 = &a1;
let mut a3 = a1.clone();
let ref a4 = a1;
let a5 = a1.clone();
drop(a2);
drop(a3);
drop(a4);
drop(a5);
forget(a2);
let a3 = &a1;
forget(a3);
forget(a4);
let a5 = a1.clone();
forget(a5);
}