/// The key part of a key-value pair. An alias for [`Vec<u8>`].
pub type Key = Vec<u8>;
/// The value part of a key-value pair. An alias for [`Vec<u8>`].
pub type Val = Vec<u8>;
/// The Version part of a key-value pair. An alias for [`u64`].
pub type Version = u64;
/// This trait appends an element to a collection, and allows chaining
#[allow(dead_code)] // not used when non of the storage backends are enabled.
pub(super) trait Add<T> {
fn add(self, v: T) -> Self;
}
impl Add<u8> for Vec<u8> {
fn add(mut self, v: u8) -> Self {
self.push(v);
self
}
}
/// This trait converts a collection of key-value pairs into the desired type
pub(super) trait Convert<T> {
fn convert(self) -> T;
}
impl<T> Convert<Vec<T>> for Vec<(Key, Val)>
where
T: From<Val>,
{
fn convert(self) -> Vec<T> {
self.into_iter().map(|(_, v)| v.into()).collect()
}
}