#![feature(exhaustive_patterns, never_type)]
#![allow(let_and_return)]
enum SingleVariantEnum {
Variant(i32),
}
struct TupleStruct(i32);
enum EmptyEnum {}
fn infallible_destructuring_match_enum() {
let wrapper = SingleVariantEnum::Variant(0);
let data = match wrapper {
SingleVariantEnum::Variant(i) => i,
};
let data = match wrapper {
SingleVariantEnum::Variant(_) => -1,
};
let data = match wrapper {
SingleVariantEnum::Variant(i) => -1,
};
let SingleVariantEnum::Variant(data) = wrapper;
}
fn infallible_destructuring_match_struct() {
let wrapper = TupleStruct(0);
let data = match wrapper {
TupleStruct(i) => i,
};
let data = match wrapper {
TupleStruct(_) => -1,
};
let data = match wrapper {
TupleStruct(i) => -1,
};
let TupleStruct(data) = wrapper;
}
fn never_enum() {
let wrapper: Result<i32, !> = Ok(23);
let data = match wrapper {
Ok(i) => i,
};
let data = match wrapper {
Ok(_) => -1,
};
let data = match wrapper {
Ok(i) => -1,
};
let Ok(data) = wrapper;
}
impl EmptyEnum {
fn match_on(&self) -> ! {
let data = match *self {};
data
}
}
fn main() {}