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#![allow(clippy::redundant_clone, clippy::unnecessary_operation)]
#![warn(clippy::manual_non_exhaustive, clippy::borrow_as_ptr, clippy::manual_bits)]
use std::mem::{size_of, size_of_val};
use std::ops::Deref;
mod enums {
enum E {
A,
B,
#[doc(hidden)]
_C,
}
// user forgot to remove the marker
#[non_exhaustive]
enum Ep {
A,
B,
#[doc(hidden)]
_C,
}
}
fn option_as_ref_deref() {
let mut opt = Some(String::from("123"));
let _ = opt.as_ref().map(String::as_str);
let _ = opt.as_ref().map(|x| x.as_str());
let _ = opt.as_mut().map(String::as_mut_str);
let _ = opt.as_mut().map(|x| x.as_mut_str());
}
fn match_like_matches() {
let _y = match Some(5) {
Some(0) => true,
_ => false,
};
}
fn match_same_arms() {
match (1, 2, 3) {
(1, .., 3) => 42,
(.., 3) => 42, //~ ERROR match arms have same body
_ => 0,
};
}
fn match_same_arms2() {
let _ = match Some(42) {
Some(_) => 24,
None => 24, //~ ERROR match arms have same body
};
}
fn manual_strip_msrv() {
let s = "hello, world!";
if s.starts_with("hello, ") {
assert_eq!(s["hello, ".len()..].to_uppercase(), "WORLD!");
}
}
fn check_index_refutable_slice() {
// This shouldn't trigger `clippy::index_refutable_slice` as the suggestion
// would only be valid from 1.42.0 onward
let slice: Option<&[u32]> = Some(&[1]);
if let Some(slice) = slice {
println!("{}", slice[0]);
}
}
fn map_clone_suggest_copied() {
// This should still trigger the lint but suggest `cloned()` instead of `copied()`
let _: Option<u64> = Some(&16).map(|b| *b);
}
fn borrow_as_ptr() {
let val = 1;
let _p = &val as *const i32;
let mut val_mut = 1;
let _p_mut = &mut val_mut as *mut i32;
}
fn manual_bits() {
size_of::<i8>() * 8;
size_of_val(&0u32) * 8;
}
fn main() {
option_as_ref_deref();
match_like_matches();
match_same_arms();
match_same_arms2();
manual_strip_msrv();
check_index_refutable_slice();
borrow_as_ptr();
}
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