87 lines
1.8 KiB
Rust
87 lines
1.8 KiB
Rust
#![warn(clippy::drop_copy, clippy::forget_copy)]
|
|
#![allow(clippy::toplevel_ref_arg, clippy::drop_ref, clippy::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);
|
|
}
|
|
|
|
#[allow(unused)]
|
|
#[allow(clippy::unit_cmp)]
|
|
fn issue9482(x: u8) {
|
|
fn println_and<T>(t: T) -> T {
|
|
println!("foo");
|
|
t
|
|
}
|
|
|
|
match x {
|
|
0 => drop(println_and(12)), // Don't lint (copy type), we only care about side-effects
|
|
1 => drop(println_and(String::new())), // Don't lint (no copy type), we only care about side-effects
|
|
2 => {
|
|
drop(println_and(13)); // Lint, even if we only care about the side-effect, it's already in a block
|
|
},
|
|
3 if drop(println_and(14)) == () => (), // Lint, idiomatic use is only in body of `Arm`
|
|
4 => drop(2), // Lint, not a fn/method call
|
|
_ => (),
|
|
}
|
|
}
|