susy_codec/
keyedvec.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//! Serialiser and prepender.
16
17use crate::Codec;
18use core::iter::Extend;
19use crate::alloc::vec::Vec;
20
21/// Trait to allow itself to be serialised and prepended by a given slice.
22pub trait KeyedVec {
23	fn to_keyed_vec(&self, prepend_key: &[u8]) -> Vec<u8>;
24}
25
26impl<T: Codec> KeyedVec for T {
27	fn to_keyed_vec(&self, prepend_key: &[u8]) -> Vec<u8> {
28		self.using_encoded(|slice| {
29			let mut r = prepend_key.to_vec();
30			r.extend(slice);
31			r
32		})
33	}
34}
susy_codec/keyedvec.rs

susy_codec/
keyedvec.rs
