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