rust/tests/ui/impl-trait/recursive-bound-eval.rs

//! Test that we can evaluate nested obligations when invoking methods on recursive calls on
//! an RPIT.

//@revisions: next current
//@[next] compile-flags: -Znext-solver

//@[current] check-pass

pub trait Parser<E> {
    fn parse(&self) -> E;
}

impl<E, T: Fn() -> E> Parser<E> for T {
    fn parse(&self) -> E {
        self()
    }
}

pub fn recursive_fn<E>() -> impl Parser<E> {
    move || recursive_fn().parse()
    //[next]~^ ERROR: type annotations needed
}

fn main() {}