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|
//@aux-build: proc_macros.rs
//@require-annotations-for-level: WARN
#![warn(clippy::single_match_else)]
#![allow(unused, clippy::needless_return, clippy::no_effect, clippy::uninlined_format_args)]
extern crate proc_macros;
use proc_macros::with_span;
enum ExprNode {
ExprAddrOf,
Butterflies,
Unicorns,
}
static NODE: ExprNode = ExprNode::Unicorns;
fn unwrap_addr() -> Option<&'static ExprNode> {
let _ = if let ExprNode::ExprAddrOf = ExprNode::Butterflies { Some(&NODE) } else {
let x = 5;
None
};
//~^^^^^^^ single_match_else
// Don't lint
with_span!(span match ExprNode::Butterflies {
ExprNode::ExprAddrOf => Some(&NODE),
_ => {
let x = 5;
None
},
})
}
macro_rules! unwrap_addr {
($expression:expr) => {
match $expression {
ExprNode::ExprAddrOf => Some(&NODE),
_ => {
let x = 5;
None
},
}
};
}
#[rustfmt::skip]
fn main() {
unwrap_addr!(ExprNode::Unicorns);
//
// don't lint single exprs/statements
//
// don't lint here
match Some(1) {
Some(a) => println!("${:?}", a),
None => return,
}
// don't lint here
match Some(1) {
Some(a) => println!("${:?}", a),
None => {
return
},
}
// don't lint here
match Some(1) {
Some(a) => println!("${:?}", a),
None => {
return;
},
}
//
// lint multiple exprs/statements "else" blocks
//
// lint here
if let Some(a) = Some(1) { println!("${:?}", a) } else {
println!("else block");
return
}
//~^^^^^^^ single_match_else
// lint here
if let Some(a) = Some(1) { println!("${:?}", a) } else {
println!("else block");
return;
}
//~^^^^^^^ single_match_else
if let Some(a) = Some(1) { println!("${:?}", a) } else {
println!("else block");
return;
}
//~^^^^^^^^ single_match_else
//~| NOTE: you might want to preserve the comments from inside the `match`
// lint here
use std::convert::Infallible;
if let Ok(a) = Result::<i32, &Infallible>::Ok(1) { println!("${:?}", a) } else {
println!("else block");
return;
}
//~^^^^^^^ single_match_else
use std::borrow::Cow;
if let Cow::Owned(a) = Cow::from("moo") { println!("${:?}", a) } else {
println!("else block");
return;
}
//~^^^^^^^ single_match_else
}
fn issue_10808(bar: Option<i32>) {
if let Some(v) = bar { unsafe {
let r = &v as *const i32;
println!("{}", *r);
} } else {
println!("None1");
println!("None2");
}
//~^^^^^^^^^^ single_match_else
if let Some(v) = bar {
println!("Some");
println!("{v}");
} else { unsafe {
let v = 0;
let r = &v as *const i32;
println!("{}", *r);
} }
//~^^^^^^^^^^^ single_match_else
if let Some(v) = bar { unsafe {
let r = &v as *const i32;
println!("{}", *r);
} } else { unsafe {
let v = 0;
let r = &v as *const i32;
println!("{}", *r);
} }
//~^^^^^^^^^^^ single_match_else
if let Some(v) = bar {
unsafe {
let r = &v as *const i32;
println!("{}", *r);
}
} else {
println!("None");
println!("None");
}
//~^^^^^^^^^^^^^ single_match_else
match bar {
Some(v) => {
println!("Some");
println!("{v}");
},
#[rustfmt::skip]
None => {
unsafe {
let v = 0;
let r = &v as *const i32;
println!("{}", *r);
}
},
}
match bar {
#[rustfmt::skip]
Some(v) => {
unsafe {
let r = &v as *const i32;
println!("{}", *r);
}
},
#[rustfmt::skip]
None => {
unsafe {
let v = 0;
let r = &v as *const i32;
println!("{}", *r);
}
},
}
}
fn irrefutable_match() -> Option<&'static ExprNode> {
Some(&NODE)
//~^^^^^^^ single_match_else
}
|
