use derive_more::{Deref, DerefMut};use serde::{Deserialize, Serialize};use std::{borrow::Borrow, sync::Arc};use util::arc_cow::ArcCow; /// A shared string is an immutable string that can be cheaply cloned in GPUI/// tasks. Essentially an abstraction over an `Arc<str>` and `&'static str`,#[derive(Deref, DerefMut, Eq, PartialEq, PartialOrd, Ord, Hash, Clone)]pub struct SharedString(ArcCow<'static, str>); impl Default for SharedString {    fn default() -> Self {        Self(ArcCow::Owned("".into()))    }} impl AsRef<str> for SharedString {    fn as_ref(&self) -> &str {        &self.0    }} impl Borrow<str> for SharedString {    fn borrow(&self) -> &str {        self.as_ref()    }} impl std::fmt::Debug for SharedString {    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {        self.0.fmt(f)    }} impl std::fmt::Display for SharedString {    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {        write!(f, "{}", self.0.as_ref())    }} impl PartialEq<String> for SharedString {    fn eq(&self, other: &String) -> bool {        self.as_ref() == other    }} impl PartialEq<SharedString> for String {    fn eq(&self, other: &SharedString) -> bool {        self == other.as_ref()    }} impl PartialEq<str> for SharedString {    fn eq(&self, other: &str) -> bool {        self.as_ref() == other    }} impl<'a> PartialEq<&'a str> for SharedString {    fn eq(&self, other: &&'a str) -> bool {        self.as_ref() == *other    }} impl From<SharedString> for Arc<str> {    fn from(val: SharedString) -> Self {        match val.0 {            ArcCow::Borrowed(borrowed) => Arc::from(borrowed),            ArcCow::Owned(owned) => owned.clone(),        }    }} impl<T: Into<ArcCow<'static, str>>> From<T> for SharedString {    fn from(value: T) -> Self {        Self(value.into())    }} impl From<SharedString> for String {    fn from(val: SharedString) -> Self {        val.0.to_string()    }} impl Serialize for SharedString {    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>    where        S: serde::Serializer,    {        serializer.serialize_str(self.as_ref())    }} impl<'de> Deserialize<'de> for SharedString {    fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>    where        D: serde::Deserializer<'de>,    {        let s = String::deserialize(deserializer)?;        Ok(SharedString::from(s))    }}