rust/tests/rustdoc/issue-110629-private-type-cycle.rs
Michael Howell b1d08275a9 rustdoc: catch and don't blow up on impl Trait cycles
An odd feature of Rust is that `Foo` is invalid, but `Bar` is okay:

    type Foo<'a, 'b> = Box<dyn PartialEq<Foo<'a, 'b>>>;
    type Bar<'a, 'b> = impl PartialEq<Bar<'a, 'b>>;

To get it right, track every time rustdoc descends into a type alias,
so if it shows up twice, it can be write the path instead of
infinitely expanding it.
2023-04-29 16:53:02 -07:00

20 lines
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Rust

// compile-flags: --document-private-items
#![feature(type_alias_impl_trait)]
type Bar<'a, 'b> = impl PartialEq<Bar<'a, 'b>> + std::fmt::Debug;
// @has issue_110629_private_type_cycle/type.Bar.html
// @has - '//pre[@class="rust item-decl"]' \
// "pub(crate) type Bar<'a, 'b> = impl PartialEq<Bar<'a, 'b>> + Debug;"
fn bar<'a, 'b>(i: &'a i32) -> Bar<'a, 'b> {
i
}
fn main() {
let meh = 42;
let muh = 42;
assert_eq!(bar(&meh), bar(&muh));
}