129 lines
4.3 KiB
Rust
129 lines
4.3 KiB
Rust
// run-rustfix
|
|
|
|
#![feature(box_patterns, stmt_expr_attributes, yeet_expr)]
|
|
|
|
#![allow(
|
|
dead_code,
|
|
ellipsis_inclusive_range_patterns,
|
|
irrefutable_let_patterns,
|
|
unreachable_patterns,
|
|
unused_mut,
|
|
unused_variables
|
|
)]
|
|
#![deny(unused_parens)]
|
|
|
|
fn lint_on_top_level() {
|
|
let a = 0; //~ ERROR unnecessary parentheses around pattern
|
|
for a in 0..1 {} //~ ERROR unnecessary parentheses around pattern
|
|
if let a = 0 {} //~ ERROR unnecessary parentheses around pattern
|
|
while let a = 0 {} //~ ERROR unnecessary parentheses around pattern
|
|
fn foo(a: u8) {} //~ ERROR unnecessary parentheses around pattern
|
|
let _ = |a: u8| 0; //~ ERROR unnecessary parentheses around pattern
|
|
}
|
|
|
|
fn no_lint_attr() {
|
|
let _x = #[allow(dead_code)] (1 + 2);
|
|
}
|
|
|
|
fn no_lint_yeet() -> Result<(), ()> {
|
|
#[allow(unreachable_code)]
|
|
if (do yeet) {}
|
|
|
|
Ok(())
|
|
}
|
|
|
|
fn no_lint_ops() {
|
|
#![allow(unreachable_code, irrefutable_let_patterns)]
|
|
if ((..{}) == ..{}) {}
|
|
if (!return) {}
|
|
loop { match (() = () = () = break {}) {} }
|
|
while let () = (*&mut false |= true && return) {}
|
|
}
|
|
|
|
fn lint_break_if_not_followed_by_block() {
|
|
#![allow(unreachable_code)]
|
|
loop { if break {} } //~ ERROR unnecessary parentheses
|
|
loop { if break ({ println!("hello") }) {} } //~ ERROR unnecessary parentheses
|
|
loop { if (break { println!("hello") }) {} }
|
|
}
|
|
|
|
// Don't lint in these cases (#64106).
|
|
fn or_patterns_no_lint() {
|
|
match Box::new(0) {
|
|
box (0 | 1) => {} // Should not lint as `box 0 | 1` binds as `(box 0) | 1`.
|
|
_ => {}
|
|
}
|
|
|
|
match 0 {
|
|
x @ (0 | 1) => {} // Should not lint as `x @ 0 | 1` binds as `(x @ 0) | 1`.
|
|
_ => {}
|
|
}
|
|
|
|
if let &(0 | 1) = &0 {} // Should also not lint.
|
|
if let &mut (0 | 1) = &mut 0 {} // Same.
|
|
|
|
fn foo((Ok(a) | Err(a)): Result<u8, u8>) {} // Doesn't parse if we remove parens for now.
|
|
|
|
let _ = |(Ok(a) | Err(a)): Result<u8, u8>| 1; // `|Ok(a) | Err(a)| 1` parses as bit-or.
|
|
}
|
|
|
|
fn or_patterns_will_lint() {
|
|
if let 0 | 1 = 0 {} //~ ERROR unnecessary parentheses around pattern
|
|
if let (0 | 1,) = (0,) {} //~ ERROR unnecessary parentheses around pattern
|
|
if let [0 | 1] = [0] {} //~ ERROR unnecessary parentheses around pattern
|
|
if let 0 | 1 | 2 = 0 {} //~ ERROR unnecessary parentheses around pattern
|
|
struct TS(u8);
|
|
if let TS(0 | 1) = TS(0) {} //~ ERROR unnecessary parentheses around pattern
|
|
struct NS { f: u8 }
|
|
if let NS { f: 0 | 1 } = (NS { f: 0 }) {} //~ ERROR unnecessary parentheses around pattern
|
|
}
|
|
|
|
// Don't lint on `&(mut x)` because `&mut x` means something else (#55342).
|
|
fn deref_mut_binding_no_lint() {
|
|
let &(mut x) = &0;
|
|
}
|
|
|
|
fn main() {
|
|
match 1 {
|
|
_ => {} //~ ERROR unnecessary parentheses around pattern
|
|
y => {} //~ ERROR unnecessary parentheses around pattern
|
|
ref r => {} //~ ERROR unnecessary parentheses around pattern
|
|
e @ 1...2 => {} //~ ERROR unnecessary parentheses around pattern
|
|
(1...2) => {} // Non ambiguous range pattern should not warn
|
|
e @ (3...4) => {} // Non ambiguous range pattern should not warn
|
|
}
|
|
|
|
match &1 {
|
|
e @ &(1...2) => {} //~ ERROR unnecessary parentheses around pattern
|
|
&_ => {} //~ ERROR unnecessary parentheses around pattern
|
|
e @ &(1...2) => {} // Ambiguous range pattern should not warn
|
|
&(1...2) => {} // Ambiguous range pattern should not warn
|
|
}
|
|
|
|
match &1 {
|
|
e @ &(1...2) | e @ &(3...4) => {} // Complex ambiguous pattern should not warn
|
|
&_ => {}
|
|
}
|
|
|
|
match 1 {
|
|
_ => {} //~ ERROR unnecessary parentheses around pattern
|
|
y => {} //~ ERROR unnecessary parentheses around pattern
|
|
ref r => {} //~ ERROR unnecessary parentheses around pattern
|
|
e @ 1..=2 => {} //~ ERROR unnecessary parentheses around pattern
|
|
(1..=2) => {} // Non ambiguous range pattern should not warn
|
|
e @ (3..=4) => {} // Non ambiguous range pattern should not warn
|
|
}
|
|
|
|
match &1 {
|
|
e @ &(1..=2) => {} //~ ERROR unnecessary parentheses around pattern
|
|
&_ => {} //~ ERROR unnecessary parentheses around pattern
|
|
e @ &(1..=2) => {} // Ambiguous range pattern should not warn
|
|
&(1..=2) => {} // Ambiguous range pattern should not warn
|
|
}
|
|
|
|
match &1 {
|
|
e @ &(1..=2) | e @ &(3..=4) => {} // Complex ambiguous pattern should not warn
|
|
&_ => {}
|
|
}
|
|
}
|