ref-self-async.rs

//@ edition:2018

#![allow(non_snake_case)]
#![feature(arbitrary_self_types)]

use std::marker::PhantomData;
use std::ops::Deref;
use std::pin::Pin;

struct Struct { }

struct Wrap<T, P>(T, PhantomData<P>);

impl<T, P> Deref for Wrap<T, P> {
    type Target = T;
    fn deref(&self) -> &T { &self.0 }
}

impl Struct {
    // Test using `&self` sugar:

    async fn ref_self(&self, f: &u32) -> &u32 {
        f
        //~^ ERROR lifetime may not live long enough
    }

    // Test using `&Self` explicitly:

    async fn ref_Self(self: &Self, f: &u32) -> &u32 {
        f
        //~^ ERROR lifetime may not live long enough
    }

    async fn box_ref_Self(self: Box<&Self>, f: &u32) -> &u32 {
        f
        //~^ ERROR lifetime may not live long enough
    }

    async fn pin_ref_Self(self: Pin<&Self>, f: &u32) -> &u32 {
        f
        //~^ ERROR lifetime may not live long enough
    }

    async fn box_box_ref_Self(self: Box<Box<&Self>>, f: &u32) -> &u32 {
        f
        //~^ ERROR lifetime may not live long enough
    }

    async fn box_pin_ref_Self(self: Box<Pin<&Self>>, f: &u32) -> &u32 {
        f
        //~^ ERROR lifetime may not live long enough
    }

    async fn wrap_ref_Self_Self(self: Wrap<&Self, Self>, f: &u8) -> &u8 {
        f
        //~^ ERROR lifetime may not live long enough
    }
}

fn main() { }

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// Struct Types
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// Generic Parameters
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// Associated Items
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// Implementations
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// Paths
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// Reference Types
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// Entities
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// Scopes
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// Binding Scopes
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// Generic Parameter Scope
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// Item Scope
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// Label Scope
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// Self Scope
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// Textual Macro Scope
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// Scope Hierarchy
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// Namespaces
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// Preludes
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// Shadowing
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// Resolution
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// Path Resolution
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// Simple Path Resolution
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// Type Path Resolution