Trait StructuralPartialEq

pub trait StructuralPartialEq { }

🔬This is a nightly-only experimental API. (structural_match)

Required trait for constants used in pattern matches.

Any type that derives PartialEq automatically implements this trait, regardless of whether its type-parameters implement PartialEq.

If a const item contains some type that does not implement this trait, then that type either (1.) does not implement PartialEq (which means the constant will not provide that comparison method, which code generation assumes is available), or (2.) it implements its own version of PartialEq (which we assume does not conform to a structural-equality comparison).

In either of the two scenarios above, we reject usage of such a constant in a pattern match.

See also the structural match RFC, and issue 63438 which motivated migrating from an attribute-based design to this trait.

Implementors

impl StructuralPartialEq for DecodeError

impl StructuralPartialEq for wiwi::prelude_std::atomic::Ordering

impl StructuralPartialEq for wiwi::prelude_std::cmp::Ordering

impl StructuralPartialEq for VarError

impl StructuralPartialEq for wiwi::prelude_std::fmt::Alignment

impl StructuralPartialEq for BacktraceStyle

impl StructuralPartialEq for SearchStep

impl StructuralPartialEq for alloc::collections::TryReserveErrorKind

impl StructuralPartialEq for AsciiChar

impl StructuralPartialEq for IpAddr

impl StructuralPartialEq for Ipv6MulticastScope

impl StructuralPartialEq for SocketAddr

impl StructuralPartialEq for FpCategory

impl StructuralPartialEq for IntErrorKind

impl StructuralPartialEq for BacktraceStatus

impl StructuralPartialEq for SeekFrom

impl StructuralPartialEq for ErrorKind

impl StructuralPartialEq for Shutdown

impl StructuralPartialEq for RecvTimeoutError

impl StructuralPartialEq for std::sync::mpsc::TryRecvError

impl StructuralPartialEq for _Unwind_Action

impl StructuralPartialEq for _Unwind_Reason_Code

impl StructuralPartialEq for Colons

impl StructuralPartialEq for Fixed

impl StructuralPartialEq for Numeric

impl StructuralPartialEq for OffsetPrecision

impl StructuralPartialEq for Pad

impl StructuralPartialEq for ParseErrorKind

impl StructuralPartialEq for SecondsFormat

impl StructuralPartialEq for Month

impl StructuralPartialEq for RoundingError

impl StructuralPartialEq for Weekday

impl StructuralPartialEq for bool

impl StructuralPartialEq for char

impl StructuralPartialEq for i8

impl StructuralPartialEq for i16

impl StructuralPartialEq for i32

impl StructuralPartialEq for i64

impl StructuralPartialEq for i128

impl StructuralPartialEq for isize

impl StructuralPartialEq for str

impl StructuralPartialEq for u8

impl StructuralPartialEq for u16

impl StructuralPartialEq for u32

impl StructuralPartialEq for u64

impl StructuralPartialEq for u128

impl StructuralPartialEq for ()

impl StructuralPartialEq for usize

impl StructuralPartialEq for wiwi::prelude_std::alloc_mod::AllocError

impl StructuralPartialEq for Layout

impl StructuralPartialEq for LayoutError

impl StructuralPartialEq for Error

impl StructuralPartialEq for Assume

impl StructuralPartialEq for RangeFull

impl StructuralPartialEq for wiwi::prelude_std::ptr::Alignment

impl StructuralPartialEq for ParseBoolError

impl StructuralPartialEq for Utf8Error

impl StructuralPartialEq for FromUtf8Error

impl StructuralPartialEq for PhantomPinned

impl StructuralPartialEq for String

impl StructuralPartialEq for UnorderedKeyError

impl StructuralPartialEq for alloc::collections::TryReserveError

impl StructuralPartialEq for CString

impl StructuralPartialEq for FromVecWithNulError

impl StructuralPartialEq for IntoStringError

impl StructuralPartialEq for NulError

impl StructuralPartialEq for CharTryFromError

impl StructuralPartialEq for ParseCharError

impl StructuralPartialEq for DecodeUtf16Error

impl StructuralPartialEq for TryFromCharError

impl StructuralPartialEq for CpuidResult

impl StructuralPartialEq for CStr

impl StructuralPartialEq for FromBytesUntilNulError

impl StructuralPartialEq for FromBytesWithNulError

impl StructuralPartialEq for Ipv4Addr

impl StructuralPartialEq for Ipv6Addr

impl StructuralPartialEq for AddrParseError

impl StructuralPartialEq for SocketAddrV4

impl StructuralPartialEq for SocketAddrV6

impl StructuralPartialEq for ParseFloatError

impl StructuralPartialEq for ParseIntError

impl StructuralPartialEq for TryFromIntError

impl StructuralPartialEq for RawWaker

impl StructuralPartialEq for RawWakerVTable

impl StructuralPartialEq for Duration

impl StructuralPartialEq for TryFromFloatSecsError

impl StructuralPartialEq for FileType

impl StructuralPartialEq for Permissions

impl StructuralPartialEq for std::os::unix::net::ucred::UCred

impl StructuralPartialEq for StripPrefixError

impl StructuralPartialEq for ExitCode

impl StructuralPartialEq for ExitStatus

impl StructuralPartialEq for ExitStatusError

impl StructuralPartialEq for Output

impl StructuralPartialEq for std::sync::condvar::WaitTimeoutResult

impl StructuralPartialEq for std::sync::mpsc::RecvError

impl StructuralPartialEq for AccessError

impl StructuralPartialEq for ThreadId

impl StructuralPartialEq for std::time::Instant

impl StructuralPartialEq for SystemTime

impl StructuralPartialEq for Parsed

impl StructuralPartialEq for InternalFixed

impl StructuralPartialEq for InternalNumeric

impl StructuralPartialEq for OffsetFormat

impl StructuralPartialEq for ParseError

impl StructuralPartialEq for Months

impl StructuralPartialEq for ParseMonthError

impl StructuralPartialEq for NaiveDate

impl StructuralPartialEq for NaiveDateDaysIterator

impl StructuralPartialEq for NaiveDateWeeksIterator

impl StructuralPartialEq for NaiveDateTime

impl StructuralPartialEq for IsoWeek

impl StructuralPartialEq for Days

impl StructuralPartialEq for NaiveTime

impl StructuralPartialEq for FixedOffset

impl StructuralPartialEq for Utc

impl StructuralPartialEq for OutOfRange

impl StructuralPartialEq for OutOfRangeError

impl StructuralPartialEq for TimeDelta

impl StructuralPartialEq for ParseWeekdayError

impl StructuralPartialEq for AllocError

impl StructuralPartialEq for Domain

impl StructuralPartialEq for Elapsed

impl StructuralPartialEq for FilterOp

impl StructuralPartialEq for Id

impl StructuralPartialEq for Instant

impl StructuralPartialEq for Interest

impl StructuralPartialEq for Interest

impl StructuralPartialEq for MissedTickBehavior

impl StructuralPartialEq for OnceState

impl StructuralPartialEq for ParkResult

impl StructuralPartialEq for ParkToken

impl StructuralPartialEq for Protocol

impl StructuralPartialEq for Ready

impl StructuralPartialEq for RecvError

impl StructuralPartialEq for RecvError

impl StructuralPartialEq for RecvFlags

impl StructuralPartialEq for RequeueOp

impl StructuralPartialEq for RuntimeFlavor

impl StructuralPartialEq for SigId

impl StructuralPartialEq for SignalKind

impl StructuralPartialEq for Token

impl StructuralPartialEq for TryAcquireError

impl StructuralPartialEq for TryRecvError

impl StructuralPartialEq for TryRecvError

impl StructuralPartialEq for TryRecvError

impl StructuralPartialEq for TryReserveError

impl StructuralPartialEq for TryReserveError

impl StructuralPartialEq for TryReserveErrorKind

impl StructuralPartialEq for Type

impl StructuralPartialEq for UCred

impl StructuralPartialEq for UnparkResult

impl StructuralPartialEq for UnparkToken

impl StructuralPartialEq for WaitTimeoutResult

impl<'a> StructuralPartialEq for Utf8Pattern<'a>

impl<'a> StructuralPartialEq for Component<'a>

impl<'a> StructuralPartialEq for Prefix<'a>

impl<'a> StructuralPartialEq for Item<'a>

impl<'a> StructuralPartialEq for Location<'a>

impl<'a> StructuralPartialEq for Utf8Chunk<'a>

impl<B, C> StructuralPartialEq for ControlFlow<B, C>

impl<Idx> StructuralPartialEq for wiwi::prelude_std::ops::Range<Idx>

impl<Idx> StructuralPartialEq for wiwi::prelude_std::ops::RangeFrom<Idx>

impl<Idx> StructuralPartialEq for wiwi::prelude_std::ops::RangeInclusive<Idx>

impl<Idx> StructuralPartialEq for RangeTo<Idx>

impl<Idx> StructuralPartialEq for RangeToInclusive<Idx>

impl<Idx> StructuralPartialEq for core::range::Range<Idx>

impl<Idx> StructuralPartialEq for core::range::RangeFrom<Idx>

impl<Idx> StructuralPartialEq for core::range::RangeInclusive<Idx>

impl<T> StructuralPartialEq for Option<T>

impl<T> StructuralPartialEq for Bound<T>

impl<T> StructuralPartialEq for Poll<T>

impl<T> StructuralPartialEq for std::sync::mpmc::error::SendTimeoutError<T>

impl<T> StructuralPartialEq for std::sync::mpsc::TrySendError<T>

impl<T> StructuralPartialEq for LocalResult<T>

impl<T> StructuralPartialEq for &T

where T: ?Sized,

impl<T> StructuralPartialEq for [T]

impl<T> StructuralPartialEq for (T₁, T₂, …, Tₙ)

This trait is implemented for tuples up to twelve items long.

impl<T> StructuralPartialEq for Reverse<T>

impl<T> StructuralPartialEq for ManuallyDrop<T>

where T: ?Sized,

impl<T> StructuralPartialEq for PhantomData<T>

where T: ?Sized,

impl<T> StructuralPartialEq for NonZero<T>

where T: ZeroablePrimitive + StructuralPartialEq,

impl<T> StructuralPartialEq for Saturating<T>

impl<T> StructuralPartialEq for Wrapping<T>

impl<T> StructuralPartialEq for Cursor<T>

impl<T> StructuralPartialEq for std::sync::mpsc::SendError<T>

impl<T> StructuralPartialEq for SendError<T>

impl<T> StructuralPartialEq for SendError<T>

impl<T> StructuralPartialEq for SendTimeoutError<T>

impl<T> StructuralPartialEq for SetError<T>

impl<T> StructuralPartialEq for TrySendError<T>

impl<T, E> StructuralPartialEq for Result<T, E>

impl<T, const N: usize> StructuralPartialEq for [T; N]

impl<Y, R> StructuralPartialEq for CoroutineState<Y, R>