278 lines
8.3 KiB
Rust
278 lines
8.3 KiB
Rust
/// Declares an item with a doc attribute computed by some macro expression.
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/// This allows documentation to be dynamically generated based on input.
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/// Necessary to work around <https://github.com/rust-lang/rust/issues/52607>.
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macro_rules! doc_concat {
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( $( #[doc = $doc:expr] $( $thing:tt )* )* ) => ( $( #[doc = $doc] $( $thing )* )* );
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}
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macro_rules! partial_eq_string {
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($id:ty $([$( $g:ident ),*])?) => {
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partial_eq_string!(@imp $(<$($g),*>)?, $id, str);
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partial_eq_string!(@imp $(<$($g),*>)?, $id, &str);
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partial_eq_string!(@imp $(<$($g),*>)?, $id, String);
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partial_eq_string!(@imp $(<$($g),*>)?, str, $id);
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partial_eq_string!(@imp $(<$($g),*>)?, &str, $id);
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partial_eq_string!(@imp $(<$($g),*>)?, String, $id);
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};
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(@imp $(<$( $g:ident ),*>)?, $l:ty, $r:ty) => {
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impl $(<$($g),*>)? ::std::cmp::PartialEq<$r> for $l {
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fn eq(&self, other: &$r) -> bool {
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::std::convert::AsRef::<str>::as_ref(self)
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== ::std::convert::AsRef::<str>::as_ref(other)
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}
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}
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}
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}
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macro_rules! as_str_based_impls {
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($id:ty) => {
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impl ::std::convert::AsRef<str> for $id {
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fn as_ref(&self) -> &str {
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self.as_str()
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}
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}
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impl ::std::fmt::Display for $id {
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fn fmt(&self, f: &mut ::std::fmt::Formatter<'_>) -> ::std::fmt::Result {
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write!(f, "{}", self.as_str())
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}
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}
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impl ::std::cmp::PartialEq for $id {
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fn eq(&self, other: &Self) -> bool {
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self.as_str() == other.as_str()
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}
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}
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impl ::std::cmp::Eq for $id {}
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impl ::std::cmp::PartialOrd for $id {
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fn partial_cmp(&self, other: &Self) -> Option<::std::cmp::Ordering> {
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::std::cmp::PartialOrd::partial_cmp(self.as_str(), other.as_str())
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}
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}
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impl ::std::cmp::Ord for $id {
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fn cmp(&self, other: &Self) -> ::std::cmp::Ordering {
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::std::cmp::Ord::cmp(self.as_str(), other.as_str())
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}
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}
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impl ::std::hash::Hash for $id {
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fn hash<H: ::std::hash::Hasher>(&self, state: &mut H) {
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self.as_str().hash(state);
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}
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}
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#[cfg(feature = "serde")]
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impl ::serde::Serialize for $id {
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fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
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where
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S: ::serde::Serializer,
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{
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serializer.serialize_str(self.as_str())
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}
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}
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};
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}
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macro_rules! common_impls {
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($id:ty, $try_from:ident, $desc:literal) => {
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impl $id {
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doc_concat! {
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#[doc = concat!("Creates a string slice from this `", stringify!($id), "`")]
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pub fn as_str(&self) -> &str {
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&self.full_id
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}
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}
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doc_concat! {
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#[doc = concat!("Creates a byte slice from this `", stringify!($id), "`")]
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pub fn as_bytes(&self) -> &[u8] {
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self.full_id.as_bytes()
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}
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}
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doc_concat! {
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#[doc = concat!("Converts this `", stringify!($id), "` into a `String`")]
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pub fn into_string(self) -> String {
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self.full_id.into()
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}
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}
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doc_concat! {
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#[doc = concat!("Converts this `", stringify!($id), "` into a `Vec<u8>`")]
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pub fn into_bytes(self) -> Vec<u8> {
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Box::<[u8]>::from(self.full_id).into()
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}
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}
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}
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impl ::std::convert::From<$id> for ::std::string::String {
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fn from(id: $id) -> Self {
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id.into_string()
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}
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}
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impl ::std::convert::From<$id> for ::std::vec::Vec<u8> {
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fn from(id: $id) -> Self {
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id.into_bytes()
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}
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}
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impl ::std::str::FromStr for $id {
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type Err = crate::Error;
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fn from_str(s: &str) -> Result<Self, Self::Err> {
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$try_from(s)
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}
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}
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impl ::std::convert::TryFrom<&str> for $id {
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type Error = crate::Error;
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fn try_from(s: &str) -> Result<Self, Self::Error> {
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$try_from(s)
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}
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}
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impl ::std::convert::TryFrom<String> for $id {
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type Error = crate::Error;
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fn try_from(s: String) -> Result<Self, Self::Error> {
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$try_from(s)
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}
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}
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#[cfg(feature = "serde")]
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impl<'de> ::serde::Deserialize<'de> for $id {
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fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
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where
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D: ::serde::Deserializer<'de>,
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{
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crate::deserialize_id(deserializer, $desc)
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}
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}
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as_str_based_impls!($id);
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partial_eq_string!($id);
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};
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}
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macro_rules! opaque_identifier {
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(
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$( #[doc = $docs:literal] )*
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$vis:vis type $id:ident;
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) => {
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$( #[doc = $docs] )*
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#[repr(transparent)]
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pub struct $id(str);
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::paste::paste! {
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doc_concat! {
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#[doc = concat!("An owned [", stringify!($id), "].")]
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pub type [<$id Box>] = ::std::boxed::Box<$id>;
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}
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}
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impl $id {
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#[allow(clippy::transmute_ptr_to_ptr)]
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fn from_borrowed(s: &str) -> &Self {
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unsafe { ::std::mem::transmute(s) }
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}
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pub(super) fn from_owned(s: ::std::boxed::Box<str>) -> ::std::boxed::Box<Self> {
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unsafe { ::std::mem::transmute(s) }
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}
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fn into_owned(self: ::std::boxed::Box<Self>) -> ::std::boxed::Box<str> {
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unsafe { ::std::mem::transmute(self) }
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}
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doc_concat! {
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#[doc = concat!("Creates a string slice from this `", stringify!($id), "`.")]
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pub fn as_str(&self) -> &str {
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&self.0
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}
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}
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doc_concat! {
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#[doc = concat!("Creates a byte slice from this `", stringify!($id), "`.")]
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pub fn as_bytes(&self) -> &[u8] {
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self.0.as_bytes()
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}
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}
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}
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impl ::std::fmt::Debug for $id {
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fn fmt(&self, f: &mut ::std::fmt::Formatter<'_>) -> ::std::fmt::Result {
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f.write_str(self.as_ref())
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}
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}
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impl Clone for ::std::boxed::Box<$id> {
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fn clone(&self) -> Self {
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(**self).to_owned()
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}
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}
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impl ToOwned for $id {
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type Owned = ::std::boxed::Box<$id>;
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fn to_owned(&self) -> Self::Owned {
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Self::from_owned(self.0.to_owned().into_boxed_str())
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}
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}
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impl From<&$id> for ::std::boxed::Box<$id> {
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fn from(id: &$id) -> Self {
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id.to_owned()
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}
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}
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impl AsRef<str> for ::std::boxed::Box<$id> {
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fn as_ref(&self) -> &str {
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self.as_str()
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}
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}
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impl<'a> From<&'a str> for &'a $id {
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fn from(s: &'a str) -> Self {
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$id::from_borrowed(s)
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}
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}
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impl From<&str> for ::std::boxed::Box<$id> {
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fn from(s: &str) -> Self {
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$id::from_owned(s.into())
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}
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}
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impl From<String> for ::std::boxed::Box<$id> {
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fn from(s: String) -> Self {
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$id::from_owned(s.into())
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}
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}
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impl From<::std::boxed::Box<$id>> for String {
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fn from(id: ::std::boxed::Box<$id>) -> Self {
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id.into_owned().into()
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}
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}
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#[cfg(feature = "serde")]
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impl<'de> ::serde::Deserialize<'de> for ::std::boxed::Box<$id> {
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fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
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where
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D: ::serde::Deserializer<'de>,
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{
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::std::boxed::Box::<str>::deserialize(deserializer).map($id::from_owned)
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}
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}
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as_str_based_impls!($id);
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partial_eq_string!($id);
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partial_eq_string!(::std::boxed::Box<$id>);
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};
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}
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