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|
#![feature(capture_disjoint_fields)]
//~^ WARNING: the feature `capture_disjoint_fields` is incomplete
//~| `#[warn(incomplete_features)]` on by default
//~| see issue #53488 <https://github.com/rust-lang/rust/issues/53488>
#![feature(never_type)]
// Should fake read the discriminant and throw an error
fn test1() {
let x: !;
let c1 = || match x { };
//~^ ERROR: use of possibly-uninitialized variable: `x`
}
// Should fake read the discriminant and throw an error
fn test2() {
let x: !;
let c2 = || match x { _ => () };
//~^ ERROR: borrow of possibly-uninitialized variable: `x`
}
// Testing single variant patterns
enum SingleVariant {
Points(u32)
}
// Should fake read the discriminant and throw an error
fn test3() {
let variant: !;
let c = || {
//~^ ERROR: borrow of possibly-uninitialized variable: `variant`
match variant {
SingleVariant::Points(_) => {}
}
};
c();
}
// Should fake read the discriminant and throw an error
fn test4() {
let variant: !;
let c = || {
//~^ ERROR: borrow of possibly-uninitialized variable: `variant`
match variant {
SingleVariant::Points(a) => {
println!("{:?}", a);
}
}
};
c();
}
fn test5() {
let t: !;
let g: !;
let a = || {
match g { };
//~^ ERROR: use of possibly-uninitialized variable: `g`
let c = || {
match t { };
//~^ ERROR: use of possibly-uninitialized variable: `t`
};
c();
};
}
// Should fake read the discriminant and throw an error
fn test6() {
let x: u8;
let c1 = || match x { };
//~^ ERROR: use of possibly-uninitialized variable: `x`
//~| ERROR: non-exhaustive patterns: type `u8` is non-empty
}
fn main() {
test1();
test2();
test3();
test4();
test5();
test6();
}
|
