// Copyright (C) 2022-2025 Parity Technologies (UK) Ltd. (admin@parity.io)
// This file is a part of the frame-decode crate.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//         http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

pub enum Either<L, R> {
    Left(L),
    Right(R),
}

impl<L, R> Iterator for Either<L, R>
where
    L: Iterator,
    R: Iterator<Item = L::Item>,
{
    type Item = L::Item;
    fn next(&mut self) -> Option<L::Item> {
        match self {
            Either::Left(l) => l.next(),
            Either::Right(r) => r.next(),
        }
    }
}
