use bstr::BStr; use crate::{    borrowed,    borrowed::{parse, Blob, Commit, Tag, Tree},    Kind, Time,}; mod error;pub use error::Error; #[derive(PartialEq, Eq, Debug, Hash, Ord, PartialOrd, Clone)]#[cfg_attr(feature = "serde1", derive(serde::Serialize, serde::Deserialize))]pub struct Signature<'a> {    #[cfg_attr(feature = "serde1", serde(borrow))]    pub name: &'a BStr,    pub email: &'a BStr,    pub time: Time,} impl<'a> Signature<'a> {    pub fn from_bytes(d: &'a [u8]) -> Result<Signature<'a>, Error> {        parse::signature(d).map(|(_, t)| t).map_err(Error::from)    }} #[derive(PartialEq, Eq, Debug, Hash, Ord, PartialOrd, Clone)]#[cfg_attr(feature = "serde1", derive(serde::Serialize, serde::Deserialize))]pub enum Object<'a> {    #[cfg_attr(feature = "serde1", serde(borrow))]    Tree(Tree<'a>),    Blob(Blob<'a>),    Commit(Commit<'a>),    Tag(Tag<'a>),} impl<'a> Object<'a> {    pub fn from_bytes(kind: Kind, bytes: &'a [u8]) -> Result<Object<'a>, Error> {        Ok(match kind {            Kind::Tree => Object::Tree(Tree::from_bytes(bytes)?),            Kind::Blob => Object::Blob(Blob { data: bytes }),            Kind::Commit => Object::Commit(Commit::from_bytes(bytes)?),            Kind::Tag => Object::Tag(Tag::from_bytes(bytes)?),        })    }} /// Convenient access to contained objectsimpl<'a> Object<'a> {    pub fn as_blob(&self) -> Option<&borrowed::Blob<'_>> {        match self {            Object::Blob(v) => Some(v),            _ => None,        }    }    pub fn as_commit(&self) -> Option<&borrowed::Commit<'a>> {        match self {            Object::Commit(v) => Some(v),            _ => None,        }    }    pub fn as_tree(&self) -> Option<&borrowed::Tree<'_>> {        match self {            Object::Tree(v) => Some(v),            _ => None,        }    }    pub fn as_tag(&self) -> Option<&borrowed::Tag<'_>> {        match self {            Object::Tag(v) => Some(v),            _ => None,        }    }    pub fn kind(&self) -> Kind {        match self {            Object::Tree(_) => Kind::Tree,            Object::Blob(_) => Kind::Blob,            Object::Commit(_) => Kind::Commit,            Object::Tag(_) => Kind::Tag,        }    }} mod convert {    use crate::borrowed::{Blob, Commit, Object, Tag, Tree};    use std::convert::TryFrom;     impl<'a> From<Tag<'a>> for Object<'a> {        fn from(v: Tag<'a>) -> Self {            Object::Tag(v)        }    }     impl<'a> From<Commit<'a>> for Object<'a> {        fn from(v: Commit<'a>) -> Self {            Object::Commit(v)        }    }     impl<'a> From<Tree<'a>> for Object<'a> {        fn from(v: Tree<'a>) -> Self {            Object::Tree(v)        }    }     impl<'a> From<Blob<'a>> for Object<'a> {        fn from(v: Blob<'a>) -> Self {            Object::Blob(v)        }    }     impl<'a> TryFrom<Object<'a>> for Tag<'a> {        type Error = Object<'a>;         fn try_from(value: Object<'a>) -> Result<Self, Self::Error> {            Ok(match value {                Object::Tag(v) => v,                _ => return Err(value),            })        }    }     impl<'a> TryFrom<Object<'a>> for Commit<'a> {        type Error = Object<'a>;         fn try_from(value: Object<'a>) -> Result<Self, Self::Error> {            Ok(match value {                Object::Commit(v) => v,                _ => return Err(value),            })        }    }     impl<'a> TryFrom<Object<'a>> for Tree<'a> {        type Error = Object<'a>;         fn try_from(value: Object<'a>) -> Result<Self, Self::Error> {            Ok(match value {                Object::Tree(v) => v,                _ => return Err(value),            })        }    }     impl<'a> TryFrom<Object<'a>> for Blob<'a> {        type Error = Object<'a>;         fn try_from(value: Object<'a>) -> Result<Self, Self::Error> {            Ok(match value {                Object::Blob(v) => v,                _ => return Err(value),            })        }    }}