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extern crate serde;
use serde::de::DeserializeOwned;
use serde::ser::Serialize;
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub enum LoadError {
IoError,
NoSuchKey,
InvalidFormat,
}
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub enum StoreError {
IoError,
}
pub trait Storage {
fn load_raw<K>(&self, key: K) -> Result<Vec<u8>, LoadError>
where
K: AsRef<str>;
fn store_raw<K, V>(&mut self, key: K, value: V) -> Result<(), StoreError>
where
K: AsRef<str>,
V: AsRef<[u8]>;
fn remove_raw<K>(&mut self, key: K) -> Result<Vec<u8>, LoadError>
where
K: AsRef<str>;
fn exists<K>(&self, key: K) -> bool
where
K: AsRef<str>;
fn clear(&mut self);
fn load<K, T>(&self, key: K) -> Result<T, LoadError>
where
K: AsRef<str>,
T: DeserializeOwned;
fn store<K, T>(&mut self, key: K, value: &T) -> Result<(), StoreError>
where
K: AsRef<str>,
T: Serialize;
fn remove<K, T>(&mut self, key: K) -> Result<T, LoadError>
where
K: AsRef<str>,
T: DeserializeOwned;
}