//! Implementations for unsupported stream and listener types.

//!

//! Sometimes we find it convenient to have an implementation for `NetStreamProvider` on an

//! uninhabited type.  When we do, this module provides the associated types for its listener and streams.

use std::io::Result as IoResult;

use std::marker::PhantomData;

use std::pin::Pin;

use std::task::{Context, Poll};

use crate::StreamOps;

/// An unconstructable AsyncRead+AsyncWrite type.

///

/// (This is the type of a Stream for any unsupported address type.)

#[derive(Debug, Clone)]

pub struct FakeStream(void::Void);

/// An unconstructable listener type.

///

/// (This is the type of a NetStreamListener for any unsupported address type.)

#[derive(Debug, Clone)]

pub struct FakeListener<ADDR>(void::Void, PhantomData<ADDR>);

/// An unconstructable stream::Stream type.

///

/// (This is the type of a incoming connection stream for any unsupported address type.)

pub struct FakeIncomingStreams<ADDR>(void::Void, PhantomData<ADDR>);

impl futures::io::AsyncRead for FakeStream {

    }

}

impl futures::io::AsyncWrite for FakeStream {

    }

    }

    }

}

impl<ADDR> futures::stream::Stream for FakeIncomingStreams<ADDR> {

    type Item = IoResult<(FakeStream, ADDR)>;

    }

}

impl<ADDR> crate::traits::NetStreamListener<ADDR> for FakeListener<ADDR>

where

    ADDR: Unpin + Send + Sync + 'static,

{

    type Incoming = FakeIncomingStreams<ADDR>;

    type Stream = FakeStream;

    }

    }

}

impl StreamOps for FakeStream {

    }

    }

}