78 lines
1.6 KiB
Rust
78 lines
1.6 KiB
Rust
#![allow(
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unused,
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clippy::redundant_clone,
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clippy::deref_addrof,
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clippy::no_effect,
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clippy::unnecessary_operation,
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clippy::vec_init_then_push,
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clippy::toplevel_ref_arg,
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clippy::needless_borrow
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)]
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use std::cell::RefCell;
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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 is_ascii(ch: char) -> bool {
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ch.is_ascii()
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}
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fn clone_on_copy() -> Option<(i32)> {
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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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let rc = RefCell::new(0);
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rc.borrow().clone();
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let x = 0u32;
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x.clone().rotate_left(1);
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#[derive(Clone, Copy)]
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struct Foo;
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impl Foo {
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fn clone(&self) -> u32 {
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0
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}
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}
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Foo.clone(); // ok, this is not the clone trait
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macro_rules! m {
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($e:expr) => {{ $e }};
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}
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m!(42).clone();
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struct Wrap([u32; 2]);
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impl core::ops::Deref for Wrap {
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type Target = [u32; 2];
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fn deref(&self) -> &[u32; 2] {
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&self.0
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}
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}
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let x = Wrap([0, 0]);
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x.clone()[0];
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let x = 42;
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let ref y = x.clone(); // ok, binds by reference
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let ref mut y = x.clone(); // ok, binds by reference
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// Issue #4348
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let mut x = 43;
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let _ = &x.clone(); // ok, getting a ref
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'a'.clone().make_ascii_uppercase(); // ok, clone and then mutate
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is_ascii('z'.clone());
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// Issue #5436
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let mut vec = Vec::new();
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vec.push(42.clone());
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// Issue #9277
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let opt: &Option<i32> = &None;
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let value = opt.clone()?; // operator precedence needed (*opt)?
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None
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}
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