//! This crate provides types for identifying git objects using a hash digest.//!//! These are provided in [borrowed versions][oid] as well as an [owned one][ObjectId].//! ## Feature Flags#![cfg_attr(    feature = "document-features",    cfg_attr(doc, doc = ::document_features::document_features!()))]#![cfg_attr(docsrs, feature(doc_cfg, doc_auto_cfg))]#![deny(missing_docs, rust_2018_idioms, unsafe_code)] #[path = "oid.rs"]mod borrowed;pub use borrowed::oid; mod object_id;pub use object_id::{decode, ObjectId}; ///pub mod prefix; /// An partial, owned hash possibly identifying an object uniquely, whose non-prefix bytes are zeroed.////// An example would `0000000000000000000000000000000032bd3242`, where `32bd3242` is the prefix,/// which would be able to match all hashes that *start with* `32bd3242`.#[derive(PartialEq, Eq, Hash, Ord, PartialOrd, Clone, Copy, Debug)]#[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))]pub struct Prefix {    bytes: ObjectId,    hex_len: usize,} /// The size of a SHA1 hash digest in bytes.const SIZE_OF_SHA1_DIGEST: usize = 20; /// Denotes the kind of function to produce a [`ObjectId`].#[derive(Default, PartialEq, Eq, Debug, Hash, Ord, PartialOrd, Clone, Copy)]#[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))]pub enum Kind {    /// The Sha1 hash with 160 bits.    #[default]    Sha1 = 1,} mod kind;