susy_codec/
joiner.rs

1// Copyright 2017, 2018 Susy Technologies
2//
3// Licensed under the Apache License, Version 2.0 (the "License");
4// you may not use this file except in compliance with the License.
5// You may obtain a copy of the License at
6//
7//     http://www.apache.org/licenses/LICENSE-2.0
8//
9// Unless required by applicable law or agreed to in writing, software
10// distributed under the License is distributed on an "AS IS" BASIS,
11// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12// See the License for the specific language governing permissions and
13// limitations under the License.
14
15//! Trait
16
17use core::iter::Extend;
18use super::Codec;
19
20/// Trait to allow itself to be serialised into a value which can be extended
21/// by bytes.
22pub trait Joiner {
23	fn and<V: Codec + Sized>(self, value: &V) -> Self;
24}
25
26impl<T> Joiner for T where T: for<'a> Extend<&'a u8> {
27	fn and<V: Codec + Sized>(mut self, value: &V) -> Self {
28		value.using_encoded(|s| self.extend(s));
29		self
30	}
31}