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#![allow(irrefutable_let_patterns)]
fn match_guards_still_work() {
match 0 {
0 if guard(0) => {},
_ => {},
}
}
fn other_guards_dont() {
match 0 {
(0 if guard(0)) => {},
//~^ ERROR unexpected parentheses surrounding `match` arm pattern
_ => {},
}
match 0 {
(0 if guard(0)) | 1 => {},
//~^ ERROR: guard patterns are experimental
_ => {},
}
let ((x if guard(x)) | x) = 0;
//~^ ERROR: guard patterns are experimental
if let (x if guard(x)) = 0 {}
//~^ ERROR: guard patterns are experimental
while let (x if guard(x)) = 0 {}
//~^ ERROR: guard patterns are experimental
#[cfg(false)]
while let (x if guard(x)) = 0 {}
//~^ ERROR: guard patterns are experimental
}
fn even_as_function_parameters(((x if guard(x), _) | (_, x)): (i32, i32)) {}
//~^ ERROR: guard patterns are experimental
fn guard<T>(x: T) -> bool {
unimplemented!()
}
fn main() {}
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