//! Contains a borrowed Object bound to a buffer holding its decompressed data.use git_object::borrowed; /// A borrowed object using a borrowed slice as backing buffer.#[derive(PartialEq, Eq, Debug, Hash, Ord, PartialOrd, Clone)]pub struct Object<'a> {    /// kind of object    pub kind: git_object::Kind,    /// decoded, decompressed data, owned by a backing store.    pub data: &'a [u8],} impl<'a> Object<'a> {    /// Decodes the data in the backing slice into a [`borrowed::Object`], allowing to access all of its data    /// conveniently. The cost of parsing an object is negligible.    ///    /// **Note** that [owned, decoded objects][git_object::owned::Object] can be created from a [`borrowed::Object`]    /// using [`borrowed::Object::into_owned()`].    pub fn decode(&self) -> Result<borrowed::Object<'_>, borrowed::Error> {        Ok(match self.kind {            git_object::Kind::Tree => borrowed::Object::Tree(borrowed::Tree::from_bytes(self.data)?),            git_object::Kind::Blob => borrowed::Object::Blob(borrowed::Blob { data: self.data }),            git_object::Kind::Commit => borrowed::Object::Commit(borrowed::Commit::from_bytes(self.data)?),            git_object::Kind::Tag => borrowed::Object::Tag(borrowed::Tag::from_bytes(self.data)?),        })    }} /// Types supporting object hash verificationpub mod verify {    use crate::{hash, loose};    use std::io;     /// Returned by [`crate::borrowed::Object::verify_checksum()`]    #[derive(thiserror::Error, Debug)]    #[allow(missing_docs)]    pub enum Error {        #[error("Object expected to have id {desired}, but actual id was {actual}")]        ChecksumMismatch {            desired: git_hash::ObjectId,            actual: git_hash::ObjectId,        },    }     impl crate::borrowed::Object<'_> {        /// Compute the checksum of `self` and compare it with the `desired` hash.        /// If the hashes do not match, an [`Error`] is returned, containing the actual        /// hash of `self`.        pub fn verify_checksum(&self, desired: impl AsRef<git_hash::oid>) -> Result<(), Error> {            let desired = desired.as_ref();            let mut sink = hash::Write::new(io::sink(), desired.kind());             loose::object::header::encode(self.kind, self.data.len() as u64, &mut sink).expect("hash to always work");            sink.hash.update(&self.data);             let actual_id = git_hash::ObjectId::from(sink.hash.digest());            if desired != actual_id {                return Err(Error::ChecksumMismatch {                    desired: desired.into(),                    actual: actual_id,                });            }            Ok(())        }    }}