chris/ruwuma
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

identifiers: Reduce macro code duplication

Browse Source
This commit is contained in:
Jonas Platte 2021-09-17 22:04:54 +02:00
parent 438efee143
commit ce947741cb
No known key found for this signature in database
GPG Key ID: 7D261D771D915378
1 changed files with 20 additions and 104 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

124
crates/ruma-identifiers/src/macros.rs
View File

@ -159,15 +159,8 @@ macro_rules! common_impls {
};
}
macro_rules! opaque_identifier {
(
$( #[doc = $docs:literal] )*
$vis:vis type $id:ident;
) => {
$( #[doc = $docs] )*
#[repr(transparent)]
pub struct $id(str);
macro_rules! opaque_identifier_common_impls {
($id:ty) => {
impl $id {
fn from_borrowed(s: &str) -> &Self {
unsafe { std::mem::transmute(s) }
@ -242,6 +235,23 @@ macro_rules! opaque_identifier {
}
}
as_str_based_impls!($id);
partial_eq_string!($id);
partial_eq_string!(Box<$id>);
};
}
macro_rules! opaque_identifier {
(
$( #[doc = $docs:literal] )*
$vis:vis type $id:ident;
) => {
$( #[doc = $docs] )*
#[repr(transparent)]
pub struct $id(str);
opaque_identifier_common_impls!($id);
impl<'a> From<&'a str> for &'a $id {
fn from(s: &'a str) -> Self {
$id::from_borrowed(s)
@ -275,10 +285,6 @@ macro_rules! opaque_identifier {
Box::<str>::deserialize(deserializer).map($id::from_owned)
}
}
as_str_based_impls!($id);
partial_eq_string!($id);
partial_eq_string!(Box<$id>);
};
}
@ -289,90 +295,9 @@ macro_rules! opaque_identifier_validated {
) => {
$( #[doc = $docs] )*
#[repr(transparent)]
#[derive(PartialEq, Eq, PartialOrd, Ord, Hash)]
#[cfg_attr(feature = "serde", derive(serde::Serialize), serde(transparent, crate = "serde"))]
pub struct $id(str);
impl $id {
#[allow(clippy::transmute_ptr_to_ptr)]
fn from_borrowed(s: &str) -> &Self {
unsafe { std::mem::transmute(s) }
}
pub(super) fn from_owned(s: Box<str>) -> Box<Self> {
unsafe { Box::from_raw(Box::into_raw(s) as _) }
}
fn into_owned(self: Box<Self>) -> Box<str> {
unsafe { Box::from_raw(Box::into_raw(self) as _) }
}
doc_concat! {
#[doc = concat!("Creates a string slice from this `", stringify!($id), "`.")]
pub fn as_str(&self) -> &str {
&self.0
}
}
doc_concat! {
#[doc = concat!("Creates a byte slice from this `", stringify!($id), "`.")]
pub fn as_bytes(&self) -> &[u8] {
self.0.as_bytes()
}
}
}
impl std::fmt::Debug for $id {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
<str as std::fmt::Debug>::fmt(self.as_str(), f)
}
}
impl Clone for Box<$id> {
fn clone(&self) -> Self {
(**self).to_owned()
}
}
impl ToOwned for $id {
type Owned = Box<$id>;
fn to_owned(&self) -> Self::Owned {
Self::from_owned(self.0.into())
}
}
impl From<&$id> for Box<$id> {
fn from(id: &$id) -> Self {
id.to_owned()
}
}
impl AsRef<str> for $id {
fn as_ref(&self) -> &str {
self.as_str()
}
}
impl AsRef<str> for Box<$id> {
fn as_ref(&self) -> &str {
self.as_str()
}
}
impl From<&$id> for std::rc::Rc<$id> {
fn from(s: &$id) -> std::rc::Rc<$id> {
let rc = std::rc::Rc::<str>::from(s.as_str());
unsafe { std::rc::Rc::from_raw(std::rc::Rc::into_raw(rc) as *const $id) }
}
}
impl From<&$id> for std::sync::Arc<$id> {
fn from(s: &$id) -> std::sync::Arc<$id> {
let arc = std::sync::Arc::<str>::from(s.as_str());
unsafe { std::sync::Arc::from_raw(std::sync::Arc::into_raw(arc) as *const $id) }
}
}
opaque_identifier_common_impls!($id);
impl From<Box<$id>> for String {
fn from(id: Box<$id>) -> Self {
@ -437,14 +362,5 @@ macro_rules! opaque_identifier_validated {
try_from(s)
}
}
impl std::fmt::Display for $id {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
write!(f, "{}", self.as_str())
}
}
partial_eq_string!($id);
partial_eq_string!(Box<$id>);
}
}