android/vendor/cfg-expr-0.15.4/src/targets.rs - toolchain/cargo-deny - Git at Google

 use crate::error::{HasAtomicParseError, Reason};
 use std::{borrow::Cow, ops::Deref};

 mod builtins;

 /// A list of all of the [builtin](https://doc.rust-lang.org/nightly/nightly-rustc/rustc_target/spec/index.html#modules)
 /// targets known to rustc, as of 1.54.0
 pub use builtins::ALL_BUILTINS;

 /// The unique identifier for a target.
 #[derive(Clone, Debug, Eq, Hash, Ord, PartialEq, PartialOrd)]
 pub struct Triple(pub Cow<'static, str>);

 /// The "abi" field
 #[derive(Clone, Debug, Eq, Hash, Ord, PartialEq, PartialOrd)]
 pub struct Abi(pub Cow<'static, str>);

 /// The "architecture" field
 #[derive(Clone, Debug, Eq, Hash, Ord, PartialEq, PartialOrd)]
 pub struct Arch(pub Cow<'static, str>);

 /// The "vendor" field, which in practice is little more than an arbitrary modifier.
 #[derive(Clone, Debug, Eq, Hash, Ord, PartialEq, PartialOrd)]
 pub struct Vendor(pub Cow<'static, str>);

 /// The "operating system" field, which sometimes implies an environment, and
 /// sometimes isn't an actual operating system.
 #[derive(Clone, Debug, Eq, Hash, Ord, PartialEq, PartialOrd)]
 pub struct Os(pub Cow<'static, str>);

 /// Individual target families, which describe a set of targets grouped in some logical manner,
 /// typically by operating system. This includes values like `unix` and `windows`.
 #[derive(Clone, Debug, Eq, Hash, Ord, PartialEq, PartialOrd)]
 pub struct Family(pub Cow<'static, str>);

 /// The "environment" field, which specifies an ABI environment on top of the
 /// operating system. In many configurations, this field is omitted, and the
 /// environment is implied by the operating system.
 #[derive(Clone, Debug, Eq, Hash, Ord, PartialEq, PartialOrd)]
 pub struct Env(pub Cow<'static, str>);

 /// The panic strategy used on this target by default.
 #[derive(Clone, Debug, Eq, Hash, Ord, PartialEq, PartialOrd)]
 pub struct Panic(pub Cow<'static, str>);

 macro_rules! field_impls {
     ($kind:ident) => {
         impl $kind {
             /// Constructs a new instance of this field.
             ///
             /// This method accepts both owned `String`s and `&'static str`s.
             #[inline]
             pub fn new(val: impl Into<Cow<'static, str>>) -> Self {
                 Self(val.into())
             }

             /// Constructs a new instance of this field from a `&'static str`.
             #[inline]
             pub const fn new_const(val: &'static str) -> Self {
                 Self(Cow::Borrowed(val))
             }

             /// Returns the string for the field.
             #[inline]
             pub fn as_str(&self) -> &str {
                 &*self.0
             }
         }

         impl AsRef<str> for $kind {
             #[inline]
             fn as_ref(&self) -> &str {
                 &*self.0
             }
         }

         impl std::fmt::Display for $kind {
             fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
                 f.write_str(self.as_str())
             }
         }
     };
 }

 field_impls!(Triple);
 field_impls!(Abi);
 field_impls!(Arch);
 field_impls!(Vendor);
 field_impls!(Os);
 field_impls!(Family);
 field_impls!(Env);
 field_impls!(Panic);

 /// Integer size and pointers for which there's support for atomic functions.
 #[derive(Copy, Clone, Debug, Eq, Hash, Ord, PartialEq, PartialOrd)]
 #[non_exhaustive]
 pub enum HasAtomic {
     /// The platform supports atomics for the given integer size in bits (e.g. `AtomicU8` if
     /// `HasAtomic::IntegerSize(8)`).
     IntegerSize(u16),

     /// The platform supports atomics for pointers (`AtomicPtr`).
     Pointer,
 }

 impl std::str::FromStr for HasAtomic {
     type Err = HasAtomicParseError;

     fn from_str(s: &str) -> Result<Self, Self::Err> {
         if let Ok(size) = s.parse::<u16>() {
             Ok(Self::IntegerSize(size))
         } else if s == "ptr" {
             Ok(HasAtomic::Pointer)
         } else {
             Err(HasAtomicParseError {
                 input: s.to_owned(),
             })
         }
     }
 }

 impl std::fmt::Display for HasAtomic {
     fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
         match self {
             Self::IntegerSize(size) => write!(f, "{size}"),
             Self::Pointer => write!(f, "ptr"),
         }
     }
 }

 /// A set of families for a target.
 ///
 /// Each target can be part of one or more families. This struct represents them.
 #[derive(Clone, Debug, Eq, Hash, Ord, PartialEq, PartialOrd)]
 pub struct Families(Cow<'static, [Family]>);

 impl Families {
     /// Constructs a new instance.
     ///
     /// This method accepts both owned `String`s and `&'static str`s.
     ///
     /// If you have a `&'static [&'static str]`, prefer [`Self::new_const`].
     #[inline]
     pub fn new(val: impl IntoIterator<Item = Family>) -> Self {
         let mut fams: Vec<_> = val.into_iter().collect();
         fams.sort_unstable();
         Self(Cow::Owned(fams))
     }

     /// Constructs a new instance of this field from a static slice of `&'static str`.
     ///
     /// `val` must be in sorted order: this constructor cannot check for that due to
     /// limitations in current versions of Rust.
     #[inline]
     pub const fn new_const(val: &'static [Family]) -> Self {
         // TODO: Check that val is sorted.
         Self(Cow::Borrowed(val))
     }

     /// Returns true if this list of families contains a given family.
     #[inline]
     pub fn contains(&self, val: &Family) -> bool {
         self.0.contains(val)
     }
 }

 impl Deref for Families {
     type Target = [Family];
     fn deref(&self) -> &Self::Target {
         &self.0
     }
 }

 impl AsRef<[Family]> for Families {
     #[inline]
     fn as_ref(&self) -> &[Family] {
         &self.0
     }
 }

 impl std::fmt::Display for Families {
     fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
         write!(f, "{{")?;
         let len = self.0.len();
         for (idx, family) in self.0.iter().enumerate() {
             write!(f, "{family}")?;
             if idx + 1 < len {
                 write!(f, ", ")?;
             }
         }
         write!(f, "}}")
     }
 }

 /// A set of [`HasAtomic`] instances a target.
 #[derive(Clone, Debug, Eq, Hash, Ord, PartialEq, PartialOrd)]
 pub struct HasAtomics(Cow<'static, [HasAtomic]>);

 impl HasAtomics {
     /// Constructs a new instance.
     ///
     /// If you have a `&'static [HasAtomic]`, prefer [`Self::new_const`].
     #[inline]
     pub fn new(val: impl IntoIterator<Item = HasAtomic>) -> Self {
         let mut has_atomics: Vec<_> = val.into_iter().collect();
         has_atomics.sort_unstable();
         Self(Cow::Owned(has_atomics))
     }

     /// Constructs a new instance of this struct from a static slice of [`HasAtomic`].
     ///
     /// `val` must be in sorted order: this constructor cannot check for that due to
     /// limitations in current versions of Rust.
     #[inline]
     pub const fn new_const(val: &'static [HasAtomic]) -> Self {
         // TODO: Check that val is sorted.
         Self(Cow::Borrowed(val))
     }

     /// Returns true if this list of families contains a given family.
     #[inline]
     pub fn contains(&self, val: HasAtomic) -> bool {
         self.0.contains(&val)
     }
 }

 impl Deref for HasAtomics {
     type Target = [HasAtomic];
     fn deref(&self) -> &Self::Target {
         &self.0
     }
 }

 impl AsRef<[HasAtomic]> for HasAtomics {
     #[inline]
     fn as_ref(&self) -> &[HasAtomic] {
         &self.0
     }
 }

 impl std::fmt::Display for HasAtomics {
     fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
         write!(f, "{{")?;
         let len = self.0.len();
         for (idx, has_atomic) in self.0.iter().enumerate() {
             write!(f, "{has_atomic}")?;
             if idx + 1 < len {
                 write!(f, ", ")?;
             }
         }
         write!(f, "}}")
     }
 }

 macro_rules! target_enum {
     (
         $(#[$outer:meta])*
         pub enum $kind:ident {
             $(
                 $(#[$inner:ident $($args:tt)*])*
                 $name:ident $(= $value:expr)?,
             )+
         }
     ) => {
         $(#[$outer])*
         #[allow(non_camel_case_types)]
         pub enum $kind {
             $(
                 $(#[$inner $($args)*])*
                 $name $(= $value)?,
             )+
         }

         impl_from_str! {
             $kind {
                 $(
                     $(#[$inner $($args)*])*
                     $name $(= $value)?,
                 )+
             }
         }
     };
 }

 macro_rules! impl_from_str {
     (
         $kind:ident {
             $(
                 $(#[$attr:ident $($args:tt)*])*
                 $name:ident $(= $value:expr)?,
             )+
         }
     ) => {
         impl std::str::FromStr for $kind {
             type Err = Reason;
             fn from_str(s: &str) -> Result<Self, Self::Err> {
                 match s {
                     $(stringify!($name) => Ok(Self::$name),)+
                     _ => Err(Reason::Unexpected(&[$(stringify!($name),)+])),
                 }
             }
         }
     };
 }

 target_enum! {
     /// The endian types known to rustc
     #[derive(Clone, Copy, Debug, Eq, Hash, Ord, PartialEq, PartialOrd)]
     pub enum Endian {
         big,
         little,
     }
 }

 /// Contains information regarding a particular target known to rustc
 #[derive(Clone, Debug, Eq, Hash, Ord, PartialEq, PartialOrd)]
 pub struct TargetInfo {
     /// The target's unique identifier
     pub triple: Triple,
     /// The target's operating system, if any. Used by the
     /// [target_os](https://doc.rust-lang.org/reference/conditional-compilation.html#target_os)
     /// predicate.
     pub os: Option<Os>,
     /// The target's ABI, if any. Used by the
     /// [target_abi](https://github.com/rust-lang/rust/issues/80970) predicate.
     pub abi: Option<Abi>,
     /// The target's CPU architecture. Used by the
     /// [target_arch](https://doc.rust-lang.org/reference/conditional-compilation.html#target_arch)
     /// predicate.
     pub arch: Arch,
     /// The target's ABI/libc used, if any. Used by the
     /// [target_env](https://doc.rust-lang.org/reference/conditional-compilation.html#target_env)
     /// predicate.
     pub env: Option<Env>,
     /// The target's vendor, if any. Used by the
     /// [target_vendor](https://doc.rust-lang.org/reference/conditional-compilation.html#target_vendor)
     /// predicate.
     pub vendor: Option<Vendor>,
     /// The target's families, if any. Used by the
     /// [target_family](https://doc.rust-lang.org/reference/conditional-compilation.html#target_family)
     /// predicate.
     pub families: Families,
     /// The size of the target's pointer type. Used by the
     /// [target_pointer_width](https://doc.rust-lang.org/reference/conditional-compilation.html#target_pointer_width)
     /// predicate.
     pub pointer_width: u8,
     /// The target's endianness. Used by the
     /// [target_endian](https://doc.rust-lang.org/reference/conditional-compilation.html#target_endian)
     /// predicate.
     pub endian: Endian,
     /// The target's support for atomics. Used by the has_target_atomics predicate.
     pub has_atomics: HasAtomics,
     /// The panic strategy used on this target by default. Used by the
     /// [panic](https://doc.rust-lang.org/beta/reference/conditional-compilation.html#panic) predicate.
     pub panic: Panic,
 }

 /// Attempts to find the `TargetInfo` for the specified target triple
 ///
 /// ```
 /// assert!(cfg_expr::targets::get_builtin_target_by_triple("x86_64-unknown-linux-musl").is_some());
 /// ```
 pub fn get_builtin_target_by_triple(triple: &str) -> Option<&'static TargetInfo> {
     ALL_BUILTINS
         .binary_search_by(|ti| ti.triple.as_ref().cmp(triple))
         .map(|i| &ALL_BUILTINS[i])
         .ok()
 }

 /// Retrieves the version of rustc for which the built-in targets were
 /// retrieved from. Targets may be added and removed between different rustc
 /// versions.
 ///
 /// ```
 /// assert_eq!("1.71.0", cfg_expr::targets::rustc_version());
 /// ```
 pub fn rustc_version() -> &'static str {
     builtins::RUSTC_VERSION
 }

 #[cfg(test)]
 mod test {
     use crate::targets::get_builtin_target_by_triple;
     use std::collections::{BTreeSet, HashSet};

     // rustc's target-list is currently sorted lexicographically
     // by the target-triple, so ensure that stays the case
     #[test]
     fn targets_are_sorted() {
         for window in super::ALL_BUILTINS.windows(2) {
             assert!(window[0].triple < window[1].triple);
         }
     }

     // Ensure our workaround for https://github.com/rust-lang/rust/issues/36156
     // still functions
     #[test]
     fn has_ios() {
         assert_eq!(
             8,
             super::ALL_BUILTINS
                 .iter()
                 .filter(|ti| ti.os == Some(super::Os::ios))
                 .count()
         );
     }

     // Ensure that TargetInfo can be used as keys for btree and hash-based data structures.
     #[test]
     fn set_map_key() {
         let target_info =
             get_builtin_target_by_triple("x86_64-unknown-linux-gnu").expect("known target");

         let mut btree_set = BTreeSet::new();
         btree_set.insert(target_info);

         let mut hash_set = HashSet::new();
         hash_set.insert(target_info);
     }

     #[test]
     fn family_comp() {
         let a = super::Families::new([super::Family::unix, super::Family::wasm]);
         let b = super::Families::new([super::Family::wasm, super::Family::unix]);

         assert_eq!(a, b);
     }
 }
	use crate::error::{HasAtomicParseError, Reason};
	use std::{borrow::Cow, ops::Deref};

	mod builtins;

	/// A list of all of the [builtin](https://doc.rust-lang.org/nightly/nightly-rustc/rustc_target/spec/index.html#modules)
	/// targets known to rustc, as of 1.54.0
	pub use builtins::ALL_BUILTINS;

	/// The unique identifier for a target.
	#[derive(Clone, Debug, Eq, Hash, Ord, PartialEq, PartialOrd)]
	pub struct Triple(pub Cow<'static, str>);

	/// The "abi" field
	#[derive(Clone, Debug, Eq, Hash, Ord, PartialEq, PartialOrd)]
	pub struct Abi(pub Cow<'static, str>);

	/// The "architecture" field
	#[derive(Clone, Debug, Eq, Hash, Ord, PartialEq, PartialOrd)]
	pub struct Arch(pub Cow<'static, str>);

	/// The "vendor" field, which in practice is little more than an arbitrary modifier.
	#[derive(Clone, Debug, Eq, Hash, Ord, PartialEq, PartialOrd)]
	pub struct Vendor(pub Cow<'static, str>);

	/// The "operating system" field, which sometimes implies an environment, and
	/// sometimes isn't an actual operating system.
	#[derive(Clone, Debug, Eq, Hash, Ord, PartialEq, PartialOrd)]
	pub struct Os(pub Cow<'static, str>);

	/// Individual target families, which describe a set of targets grouped in some logical manner,
	/// typically by operating system. This includes values like `unix` and `windows`.
	#[derive(Clone, Debug, Eq, Hash, Ord, PartialEq, PartialOrd)]
	pub struct Family(pub Cow<'static, str>);

	/// The "environment" field, which specifies an ABI environment on top of the
	/// operating system. In many configurations, this field is omitted, and the
	/// environment is implied by the operating system.
	#[derive(Clone, Debug, Eq, Hash, Ord, PartialEq, PartialOrd)]
	pub struct Env(pub Cow<'static, str>);

	/// The panic strategy used on this target by default.
	#[derive(Clone, Debug, Eq, Hash, Ord, PartialEq, PartialOrd)]
	pub struct Panic(pub Cow<'static, str>);

	macro_rules! field_impls {
	($kind:ident) => {
	impl $kind {
	/// Constructs a new instance of this field.
	///
	/// This method accepts both owned `String`s and `&'static str`s.
	#[inline]
	pub fn new(val: impl Into<Cow<'static, str>>) -> Self {
	Self(val.into())
	}

	/// Constructs a new instance of this field from a `&'static str`.
	#[inline]
	pub const fn new_const(val: &'static str) -> Self {
	Self(Cow::Borrowed(val))
	}

	/// Returns the string for the field.
	#[inline]
	pub fn as_str(&self) -> &str {
	&*self.0
	}
	}

	impl AsRef<str> for $kind {
	#[inline]
	fn as_ref(&self) -> &str {
	&*self.0
	}
	}

	impl std::fmt::Display for $kind {
	fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
	f.write_str(self.as_str())
	}
	}
	};
	}

	field_impls!(Triple);
	field_impls!(Abi);
	field_impls!(Arch);
	field_impls!(Vendor);
	field_impls!(Os);
	field_impls!(Family);
	field_impls!(Env);
	field_impls!(Panic);

	/// Integer size and pointers for which there's support for atomic functions.
	#[derive(Copy, Clone, Debug, Eq, Hash, Ord, PartialEq, PartialOrd)]
	#[non_exhaustive]
	pub enum HasAtomic {
	/// The platform supports atomics for the given integer size in bits (e.g. `AtomicU8` if
	/// `HasAtomic::IntegerSize(8)`).
	IntegerSize(u16),

	/// The platform supports atomics for pointers (`AtomicPtr`).
	Pointer,
	}

	impl std::str::FromStr for HasAtomic {
	type Err = HasAtomicParseError;

	fn from_str(s: &str) -> Result<Self, Self::Err> {
	if let Ok(size) = s.parse::<u16>() {
	Ok(Self::IntegerSize(size))
	} else if s == "ptr" {
	Ok(HasAtomic::Pointer)
	} else {
	Err(HasAtomicParseError {
	input: s.to_owned(),
	})
	}
	}
	}

	impl std::fmt::Display for HasAtomic {
	fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
	match self {
	Self::IntegerSize(size) => write!(f, "{size}"),
	Self::Pointer => write!(f, "ptr"),
	}
	}
	}

	/// A set of families for a target.
	///
	/// Each target can be part of one or more families. This struct represents them.
	#[derive(Clone, Debug, Eq, Hash, Ord, PartialEq, PartialOrd)]
	pub struct Families(Cow<'static, [Family]>);

	impl Families {
	/// Constructs a new instance.
	///
	/// This method accepts both owned `String`s and `&'static str`s.
	///
	/// If you have a `&'static [&'static str]`, prefer [`Self::new_const`].
	#[inline]
	pub fn new(val: impl IntoIterator<Item = Family>) -> Self {
	let mut fams: Vec<_> = val.into_iter().collect();
	fams.sort_unstable();
	Self(Cow::Owned(fams))
	}

	/// Constructs a new instance of this field from a static slice of `&'static str`.
	///
	/// `val` must be in sorted order: this constructor cannot check for that due to
	/// limitations in current versions of Rust.
	#[inline]
	pub const fn new_const(val: &'static [Family]) -> Self {
	// TODO: Check that val is sorted.
	Self(Cow::Borrowed(val))
	}

	/// Returns true if this list of families contains a given family.
	#[inline]
	pub fn contains(&self, val: &Family) -> bool {
	self.0.contains(val)
	}
	}

	impl Deref for Families {
	type Target = [Family];
	fn deref(&self) -> &Self::Target {
	&self.0
	}
	}

	impl AsRef<[Family]> for Families {
	#[inline]
	fn as_ref(&self) -> &[Family] {
	&self.0
	}
	}

	impl std::fmt::Display for Families {
	fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
	write!(f, "{{")?;
	let len = self.0.len();
	for (idx, family) in self.0.iter().enumerate() {
	write!(f, "{family}")?;
	if idx + 1 < len {
	write!(f, ", ")?;
	}
	}
	write!(f, "}}")
	}
	}

	/// A set of [`HasAtomic`] instances a target.
	#[derive(Clone, Debug, Eq, Hash, Ord, PartialEq, PartialOrd)]
	pub struct HasAtomics(Cow<'static, [HasAtomic]>);

	impl HasAtomics {
	/// Constructs a new instance.
	///
	/// If you have a `&'static [HasAtomic]`, prefer [`Self::new_const`].
	#[inline]
	pub fn new(val: impl IntoIterator<Item = HasAtomic>) -> Self {
	let mut has_atomics: Vec<_> = val.into_iter().collect();
	has_atomics.sort_unstable();
	Self(Cow::Owned(has_atomics))
	}

	/// Constructs a new instance of this struct from a static slice of [`HasAtomic`].
	///
	/// `val` must be in sorted order: this constructor cannot check for that due to
	/// limitations in current versions of Rust.
	#[inline]
	pub const fn new_const(val: &'static [HasAtomic]) -> Self {
	// TODO: Check that val is sorted.
	Self(Cow::Borrowed(val))
	}

	/// Returns true if this list of families contains a given family.
	#[inline]
	pub fn contains(&self, val: HasAtomic) -> bool {
	self.0.contains(&val)
	}
	}

	impl Deref for HasAtomics {
	type Target = [HasAtomic];
	fn deref(&self) -> &Self::Target {
	&self.0
	}
	}

	impl AsRef<[HasAtomic]> for HasAtomics {
	#[inline]
	fn as_ref(&self) -> &[HasAtomic] {
	&self.0
	}
	}

	impl std::fmt::Display for HasAtomics {
	fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
	write!(f, "{{")?;
	let len = self.0.len();
	for (idx, has_atomic) in self.0.iter().enumerate() {
	write!(f, "{has_atomic}")?;
	if idx + 1 < len {
	write!(f, ", ")?;
	}
	}
	write!(f, "}}")
	}
	}

	macro_rules! target_enum {
	(
	$(#[$outer:meta])*
	pub enum $kind:ident {
	$(
	$(#[$inner:ident $($args:tt)])
	$name:ident $(= $value:expr)?,
	)+
	}
	) => {
	$(#[$outer])*
	#[allow(non_camel_case_types)]
	pub enum $kind {
	$(
	$(#[$inner $($args)])
	$name $(= $value)?,
	)+
	}

	impl_from_str! {
	$kind {
	$(
	$(#[$inner $($args)])
	$name $(= $value)?,
	)+
	}
	}
	};
	}

	macro_rules! impl_from_str {
	(
	$kind:ident {
	$(
	$(#[$attr:ident $($args:tt)])
	$name:ident $(= $value:expr)?,
	)+
	}
	) => {
	impl std::str::FromStr for $kind {
	type Err = Reason;
	fn from_str(s: &str) -> Result<Self, Self::Err> {
	match s {
	$(stringify!($name) => Ok(Self::$name),)+
	_ => Err(Reason::Unexpected(&[$(stringify!($name),)+])),
	}
	}
	}
	};
	}

	target_enum! {
	/// The endian types known to rustc
	#[derive(Clone, Copy, Debug, Eq, Hash, Ord, PartialEq, PartialOrd)]
	pub enum Endian {
	big,
	little,
	}
	}

	/// Contains information regarding a particular target known to rustc
	#[derive(Clone, Debug, Eq, Hash, Ord, PartialEq, PartialOrd)]
	pub struct TargetInfo {
	/// The target's unique identifier
	pub triple: Triple,
	/// The target's operating system, if any. Used by the
	/// [target_os](https://doc.rust-lang.org/reference/conditional-compilation.html#target_os)
	/// predicate.
	pub os: Option<Os>,
	/// The target's ABI, if any. Used by the
	/// [target_abi](https://github.com/rust-lang/rust/issues/80970) predicate.
	pub abi: Option<Abi>,
	/// The target's CPU architecture. Used by the
	/// [target_arch](https://doc.rust-lang.org/reference/conditional-compilation.html#target_arch)
	/// predicate.
	pub arch: Arch,
	/// The target's ABI/libc used, if any. Used by the
	/// [target_env](https://doc.rust-lang.org/reference/conditional-compilation.html#target_env)
	/// predicate.
	pub env: Option<Env>,
	/// The target's vendor, if any. Used by the
	/// [target_vendor](https://doc.rust-lang.org/reference/conditional-compilation.html#target_vendor)
	/// predicate.
	pub vendor: Option<Vendor>,
	/// The target's families, if any. Used by the
	/// [target_family](https://doc.rust-lang.org/reference/conditional-compilation.html#target_family)
	/// predicate.
	pub families: Families,
	/// The size of the target's pointer type. Used by the
	/// [target_pointer_width](https://doc.rust-lang.org/reference/conditional-compilation.html#target_pointer_width)
	/// predicate.
	pub pointer_width: u8,
	/// The target's endianness. Used by the
	/// [target_endian](https://doc.rust-lang.org/reference/conditional-compilation.html#target_endian)
	/// predicate.
	pub endian: Endian,
	/// The target's support for atomics. Used by the has_target_atomics predicate.
	pub has_atomics: HasAtomics,
	/// The panic strategy used on this target by default. Used by the
	/// [panic](https://doc.rust-lang.org/beta/reference/conditional-compilation.html#panic) predicate.
	pub panic: Panic,
	}

	/// Attempts to find the `TargetInfo` for the specified target triple
	///
	/// ```
	/// assert!(cfg_expr::targets::get_builtin_target_by_triple("x86_64-unknown-linux-musl").is_some());
	/// ```
	pub fn get_builtin_target_by_triple(triple: &str) -> Option<&'static TargetInfo> {
	ALL_BUILTINS
	.binary_search_by(\|ti\| ti.triple.as_ref().cmp(triple))
	.map(\|i\| &ALL_BUILTINS[i])
	.ok()
	}

	/// Retrieves the version of rustc for which the built-in targets were
	/// retrieved from. Targets may be added and removed between different rustc
	/// versions.
	///
	/// ```
	/// assert_eq!("1.71.0", cfg_expr::targets::rustc_version());
	/// ```
	pub fn rustc_version() -> &'static str {
	builtins::RUSTC_VERSION
	}

	#[cfg(test)]
	mod test {
	use crate::targets::get_builtin_target_by_triple;
	use std::collections::{BTreeSet, HashSet};

	// rustc's target-list is currently sorted lexicographically
	// by the target-triple, so ensure that stays the case
	#[test]
	fn targets_are_sorted() {
	for window in super::ALL_BUILTINS.windows(2) {
	assert!(window[0].triple < window[1].triple);
	}
	}

	// Ensure our workaround for https://github.com/rust-lang/rust/issues/36156
	// still functions
	#[test]
	fn has_ios() {
	assert_eq!(
	8,
	super::ALL_BUILTINS
	.iter()
	.filter(\|ti\| ti.os == Some(super::Os::ios))
	.count()
	);
	}

	// Ensure that TargetInfo can be used as keys for btree and hash-based data structures.
	#[test]
	fn set_map_key() {
	let target_info =
	get_builtin_target_by_triple("x86_64-unknown-linux-gnu").expect("known target");

	let mut btree_set = BTreeSet::new();
	btree_set.insert(target_info);

	let mut hash_set = HashSet::new();
	hash_set.insert(target_info);
	}

	#[test]
	fn family_comp() {
	let a = super::Families::new([super::Family::unix, super::Family::wasm]);
	let b = super::Families::new([super::Family::wasm, super::Family::unix]);

	assert_eq!(a, b);
	}
	}