154 lines
3.4 KiB
Rust
154 lines
3.4 KiB
Rust
#![feature(exclusive_range_pattern)]
|
|
#![warn(clippy::all)]
|
|
#![allow(unused, clippy::redundant_pattern_matching)]
|
|
#![warn(clippy::match_same_arms)]
|
|
|
|
fn dummy() {}
|
|
|
|
fn ref_pats() {
|
|
{
|
|
let v = &Some(0);
|
|
match v {
|
|
&Some(v) => println!("{:?}", v),
|
|
&None => println!("none"),
|
|
}
|
|
match v {
|
|
// this doesn't trigger, we have a different pattern
|
|
&Some(v) => println!("some"),
|
|
other => println!("other"),
|
|
}
|
|
}
|
|
let tup = &(1, 2);
|
|
match tup {
|
|
&(v, 1) => println!("{}", v),
|
|
_ => println!("none"),
|
|
}
|
|
// special case: using & both in expr and pats
|
|
let w = Some(0);
|
|
match &w {
|
|
&Some(v) => println!("{:?}", v),
|
|
&None => println!("none"),
|
|
}
|
|
// false positive: only wildcard pattern
|
|
let w = Some(0);
|
|
match w {
|
|
_ => println!("none"),
|
|
}
|
|
|
|
let a = &Some(0);
|
|
if let &None = a {
|
|
println!("none");
|
|
}
|
|
|
|
let b = Some(0);
|
|
if let &None = &b {
|
|
println!("none");
|
|
}
|
|
}
|
|
|
|
fn match_wild_err_arm() {
|
|
let x: Result<i32, &str> = Ok(3);
|
|
|
|
match x {
|
|
Ok(3) => println!("ok"),
|
|
Ok(_) => println!("ok"),
|
|
Err(_) => panic!("err"),
|
|
}
|
|
|
|
match x {
|
|
Ok(3) => println!("ok"),
|
|
Ok(_) => println!("ok"),
|
|
Err(_) => panic!(),
|
|
}
|
|
|
|
match x {
|
|
Ok(3) => println!("ok"),
|
|
Ok(_) => println!("ok"),
|
|
Err(_) => {
|
|
panic!();
|
|
},
|
|
}
|
|
|
|
// allowed when not with `panic!` block
|
|
match x {
|
|
Ok(3) => println!("ok"),
|
|
Ok(_) => println!("ok"),
|
|
Err(_) => println!("err"),
|
|
}
|
|
|
|
// allowed when used with `unreachable!`
|
|
match x {
|
|
Ok(3) => println!("ok"),
|
|
Ok(_) => println!("ok"),
|
|
Err(_) => unreachable!(),
|
|
}
|
|
|
|
match x {
|
|
Ok(3) => println!("ok"),
|
|
Ok(_) => println!("ok"),
|
|
Err(_) => unreachable!(),
|
|
}
|
|
|
|
match x {
|
|
Ok(3) => println!("ok"),
|
|
Ok(_) => println!("ok"),
|
|
Err(_) => {
|
|
unreachable!();
|
|
},
|
|
}
|
|
|
|
// no warning because of the guard
|
|
match x {
|
|
Ok(x) if x * x == 64 => println!("ok"),
|
|
Ok(_) => println!("ok"),
|
|
Err(_) => println!("err"),
|
|
}
|
|
|
|
// this used to be a false positive, see #1996
|
|
match x {
|
|
Ok(3) => println!("ok"),
|
|
Ok(x) if x * x == 64 => println!("ok 64"),
|
|
Ok(_) => println!("ok"),
|
|
Err(_) => println!("err"),
|
|
}
|
|
|
|
match (x, Some(1i32)) {
|
|
(Ok(x), Some(_)) => println!("ok {}", x),
|
|
(Ok(_), Some(x)) => println!("ok {}", x),
|
|
_ => println!("err"),
|
|
}
|
|
|
|
// no warning because of the different types for x
|
|
match (x, Some(1.0f64)) {
|
|
(Ok(x), Some(_)) => println!("ok {}", x),
|
|
(Ok(_), Some(x)) => println!("ok {}", x),
|
|
_ => println!("err"),
|
|
}
|
|
|
|
// because of a bug, no warning was generated for this case before #2251
|
|
match x {
|
|
Ok(_tmp) => println!("ok"),
|
|
Ok(3) => println!("ok"),
|
|
Ok(_) => println!("ok"),
|
|
Err(_) => {
|
|
unreachable!();
|
|
},
|
|
}
|
|
}
|
|
|
|
fn match_as_ref() {
|
|
let owned: Option<()> = None;
|
|
let borrowed: Option<&()> = match owned {
|
|
None => None,
|
|
Some(ref v) => Some(v),
|
|
};
|
|
|
|
let mut mut_owned: Option<()> = None;
|
|
let borrow_mut: Option<&mut ()> = match mut_owned {
|
|
None => None,
|
|
Some(ref mut v) => Some(v),
|
|
};
|
|
}
|
|
|
|
fn main() {}
|