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|
#![warn(clippy::match_ref_pats)]
#![allow(dead_code, unused_variables)]
#![allow(
clippy::enum_variant_names,
clippy::equatable_if_let,
clippy::uninlined_format_args,
clippy::empty_loop,
clippy::diverging_sub_expression
)]
fn ref_pats() {
{
let v = &Some(0);
match v {
//~^ match_ref_pats
&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 {
//~^ match_ref_pats
&Some(v) => println!("{:?}", v),
&None => println!("none"),
}
// False positive: only wildcard pattern.
let w = Some(0);
#[allow(clippy::match_single_binding)]
match w {
_ => println!("none"),
}
let a = &Some(0);
if let &None = a {
//~^ redundant_pattern_matching
println!("none");
}
let b = Some(0);
if let &None = &b {
//~^ redundant_pattern_matching
println!("none");
}
}
mod ice_3719 {
macro_rules! foo_variant(
($idx:expr) => (Foo::get($idx).unwrap())
);
enum Foo {
A,
B,
}
impl Foo {
fn get(idx: u8) -> Option<&'static Self> {
match idx {
0 => Some(&Foo::A),
1 => Some(&Foo::B),
_ => None,
}
}
}
fn ice_3719() {
// ICE #3719
match foo_variant!(0) {
&Foo::A => println!("A"),
_ => println!("Wild"),
}
}
}
mod issue_7740 {
macro_rules! foobar_variant(
($idx:expr) => (FooBar::get($idx).unwrap())
);
enum FooBar {
Foo,
Bar,
FooBar,
BarFoo,
}
impl FooBar {
fn get(idx: u8) -> Option<&'static Self> {
match idx {
0 => Some(&FooBar::Foo),
1 => Some(&FooBar::Bar),
2 => Some(&FooBar::FooBar),
3 => Some(&FooBar::BarFoo),
_ => None,
}
}
}
fn issue_7740() {
// Issue #7740
match foobar_variant!(0) {
//~^ match_ref_pats
&FooBar::Foo => println!("Foo"),
&FooBar::Bar => println!("Bar"),
&FooBar::FooBar => println!("FooBar"),
_ => println!("Wild"),
}
// This shouldn't trigger
if let &FooBar::BarFoo = foobar_variant!(3) {
println!("BarFoo");
} else {
println!("Wild");
}
}
}
mod issue15378 {
fn never_in_match() {
match unimplemented!() {
&_ => {},
&&&42 => {
todo!()
},
_ => {},
}
match panic!() {
&_ => {},
&&&42 => {
todo!()
},
_ => {},
}
match loop {} {
&_ => {},
&&&42 => {
todo!()
},
_ => {},
}
}
}
fn main() {}
|
