36 lines
920 B
Rust
36 lines
920 B
Rust
// Issue 22443: Reject code using non-regular types that would
|
|
// otherwise cause dropck to loop infinitely.
|
|
//
|
|
// This version is just checking that we still sanely handle a trivial
|
|
// wrapper around the non-regular type. (It also demonstrates how the
|
|
// error messages will report different types depending on which type
|
|
// dropck is analyzing.)
|
|
|
|
use std::marker::PhantomData;
|
|
|
|
struct Digit<T> {
|
|
elem: T
|
|
}
|
|
|
|
struct Node<T:'static> { m: PhantomData<&'static T> }
|
|
|
|
enum FingerTree<T:'static> {
|
|
Single(T),
|
|
// According to the bug report, Digit before Box would infinite loop.
|
|
Deep(
|
|
Digit<T>,
|
|
Box<FingerTree<Node<T>>>,
|
|
)
|
|
}
|
|
|
|
enum Wrapper<T:'static> {
|
|
Simple,
|
|
Other(FingerTree<T>),
|
|
}
|
|
|
|
fn main() {
|
|
let w = //~ ERROR overflow while adding drop-check rules for `Option
|
|
Some(Wrapper::Simple::<u32>);
|
|
//~^ ERROR overflow while adding drop-check rules for `Wrapper
|
|
}
|