openethereum/ethstore/src/json/version.rs

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// Copyright 2015, 2016 Ethcore (UK) Ltd.
// This file is part of Parity.
// Parity is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// Parity is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with Parity. If not, see <http://www.gnu.org/licenses/>.
use serde::{Serialize, Serializer, Deserialize, Deserializer, Error as SerdeError};
use serde::de::Visitor;
use super::Error;
#[derive(Debug, PartialEq)]
pub enum Version {
V3,
}
impl Serialize for Version {
fn serialize<S>(&self, serializer: &mut S) -> Result<(), S::Error>
where S: Serializer {
match *self {
Version::V3 => serializer.serialize_u64(3)
}
}
}
impl Deserialize for Version {
fn deserialize<D>(deserializer: &mut D) -> Result<Version, D::Error>
where D: Deserializer {
deserializer.deserialize(VersionVisitor)
}
}
struct VersionVisitor;
impl Visitor for VersionVisitor {
type Value = Version;
fn visit_u64<E>(&mut self, value: u64) -> Result<Self::Value, E> where E: SerdeError {
match value {
3 => Ok(Version::V3),
_ => Err(SerdeError::custom(Error::UnsupportedVersion))
}
}
}