use crate::mutable;use std::io; /// A mutable object representing [`Trees`][mutable::Tree], [`Blobs`][mutable::Blob], [`Commits`][mutable::Commit] or [`Tags`][mutable::Tag].#[derive(PartialEq, Eq, Debug, Hash, Ord, PartialOrd, Clone)]#[cfg_attr(feature = "serde1", derive(serde::Serialize, serde::Deserialize))]#[allow(clippy::large_enum_variant, missing_docs)]pub enum Object {    Tree(mutable::Tree),    Blob(mutable::Blob),    Commit(mutable::Commit),    Tag(mutable::Tag),} /// Convenient extraction of typed object.impl Object {    /// Returns a [`Blob`][mutable::Blob] if it is one.    pub fn as_blob(&self) -> Option<&mutable::Blob> {        match self {            Object::Blob(v) => Some(v),            _ => None,        }    }    /// Returns a [`Commit`][mutable::Commit] if it is one.    pub fn as_commit(&self) -> Option<&mutable::Commit> {        match self {            Object::Commit(v) => Some(v),            _ => None,        }    }    /// Returns a [`Tree`][mutable::Tree] if it is one.    pub fn as_tree(&self) -> Option<&mutable::Tree> {        match self {            Object::Tree(v) => Some(v),            _ => None,        }    }    /// Returns a [`Tag`][mutable::Tag] if it is one.    pub fn as_tag(&self) -> Option<&mutable::Tag> {        match self {            Object::Tag(v) => Some(v),            _ => None,        }    }    /// Returns the kind of object stored in this instance.    pub fn kind(&self) -> crate::Kind {        match self {            Object::Tree(_) => crate::Kind::Tree,            Object::Blob(_) => crate::Kind::Blob,            Object::Commit(_) => crate::Kind::Commit,            Object::Tag(_) => crate::Kind::Tag,        }    }} /// Serializationimpl Object {    /// Write the contained object to `out` in the git serialization format.    pub fn write_to(&self, out: impl io::Write) -> io::Result<()> {        use Object::*;        match self {            Tree(v) => v.write_to(out),            Blob(v) => v.write_to(out),            Commit(v) => v.write_to(out),            Tag(v) => v.write_to(out),        }    }} mod convert {    use crate::mutable::{Blob, Commit, Object, Tag, Tree};    use std::convert::TryFrom;     impl From<Tag> for Object {        fn from(v: Tag) -> Self {            Object::Tag(v)        }    }     impl From<Commit> for Object {        fn from(v: Commit) -> Self {            Object::Commit(v)        }    }     impl From<Tree> for Object {        fn from(v: Tree) -> Self {            Object::Tree(v)        }    }     impl From<Blob> for Object {        fn from(v: Blob) -> Self {            Object::Blob(v)        }    }     impl TryFrom<Object> for Tag {        type Error = Object;         fn try_from(value: Object) -> Result<Self, Self::Error> {            Ok(match value {                Object::Tag(v) => v,                _ => return Err(value),            })        }    }     impl TryFrom<Object> for Commit {        type Error = Object;         fn try_from(value: Object) -> Result<Self, Self::Error> {            Ok(match value {                Object::Commit(v) => v,                _ => return Err(value),            })        }    }     impl TryFrom<Object> for Tree {        type Error = Object;         fn try_from(value: Object) -> Result<Self, Self::Error> {            Ok(match value {                Object::Tree(v) => v,                _ => return Err(value),            })        }    }     impl TryFrom<Object> for Blob {        type Error = Object;         fn try_from(value: Object) -> Result<Self, Self::Error> {            Ok(match value {                Object::Blob(v) => v,                _ => return Err(value),            })        }    }}