rust-clippy/tests/ui/unnecessary_clone.rs
2017-10-09 23:38:56 -05:00

59 lines
1.1 KiB
Rust

#![allow(unused)]
use std::collections::HashSet;
use std::collections::VecDeque;
use std::rc::{self, Rc};
use std::sync::{self, Arc};
fn main() {}
fn clone_on_copy() {
42.clone();
vec![1].clone(); // ok, not a Copy type
Some(vec![1]).clone(); // ok, not a Copy type
(&42).clone();
}
fn clone_on_ref_ptr() {
let rc = Rc::new(true);
let arc = Arc::new(true);
let rcweak = Rc::downgrade(&rc);
let arc_weak = Arc::downgrade(&arc);
rc.clone();
Rc::clone(&rc);
arc.clone();
Arc::clone(&arc);
rcweak.clone();
rc::Weak::clone(&rcweak);
arc_weak.clone();
sync::Weak::clone(&arc_weak);
}
fn clone_on_copy_generic<T: Copy>(t: T) {
t.clone();
Some(t).clone();
}
fn clone_on_double_ref() {
let x = vec![1];
let y = &&x;
let z: &Vec<_> = y.clone();
println!("{:p} {:p}",*y, z);
}
fn iter_clone_collect() {
let v = [1,2,3,4,5];
let v2 : Vec<isize> = v.iter().cloned().collect();
let v3 : HashSet<isize> = v.iter().cloned().collect();
let v4 : VecDeque<isize> = v.iter().cloned().collect();
}