Trait std::marker::StructuralPartialEq[−][src]

pub trait StructuralPartialEq { }

🔬 This is a nightly-only experimental API. (structural_match #31434)

Expand description

模式匹配中使用的常量需要 trait。

不管其类型参数是否实现 Eq，任何派生 PartialEq 的类型都会自动实现此 trait。

如果 const 项包含某种不实现此 trait 的类型，则该类型要么 (1.) 不实现 PartialEq (这意味着常量将不提供该比较方法 (代码生成假定可用) )，要么 (2.) 自身实现 itsPartialEq 的版本 (我们认为不符合结构相等性比较)。

在以上两种情况中的任何一种情况下，我们都拒绝在模式匹配中使用此类常量。

另请参见 structural match RFC 和 issue 63438，它们促使从基于属性的设计迁移到此 trait。

Implementations on Foreign Types

Trait std::marker::StructuralPartialEq[−][src]

Implementations on Foreign Types

impl StructuralPartialEq for CpuidResult

impl<'a> StructuralPartialEq for Utf8LossyChunk<'a>

impl StructuralPartialEq for FromSecsError

Implementors

impl StructuralPartialEq for BacktraceStatus

impl StructuralPartialEq for std::cmp::Ordering

impl StructuralPartialEq for TryReserveError

impl StructuralPartialEq for VarError

impl StructuralPartialEq for ErrorKind

impl StructuralPartialEq for SeekFrom

impl StructuralPartialEq for IpAddr

impl StructuralPartialEq for Ipv6MulticastScope

impl StructuralPartialEq for Shutdown

impl StructuralPartialEq for SocketAddr

impl StructuralPartialEq for FpCategory

impl StructuralPartialEq for IntErrorKind

impl StructuralPartialEq for SearchStep

impl StructuralPartialEq for std::sync::atomic::Ordering

impl StructuralPartialEq for RecvTimeoutError

impl StructuralPartialEq for TryRecvError

impl StructuralPartialEq for AllocError

impl StructuralPartialEq for Layout

impl StructuralPartialEq for LayoutError

impl StructuralPartialEq for TypeId

impl StructuralPartialEq for CharTryFromError

impl StructuralPartialEq for DecodeUtf16Error

impl StructuralPartialEq for ParseCharError

impl StructuralPartialEq for CString

impl StructuralPartialEq for FromBytesWithNulError

impl StructuralPartialEq for FromVecWithNulError

impl StructuralPartialEq for IntoStringError

impl StructuralPartialEq for NulError

impl StructuralPartialEq for Error

impl StructuralPartialEq for FileType

impl StructuralPartialEq for Permissions

impl StructuralPartialEq for AddrParseError

impl StructuralPartialEq for NonZeroI8

impl StructuralPartialEq for NonZeroI16

impl StructuralPartialEq for NonZeroI32

impl StructuralPartialEq for NonZeroI64

impl StructuralPartialEq for NonZeroI128

impl StructuralPartialEq for NonZeroIsize

impl StructuralPartialEq for NonZeroU8

impl StructuralPartialEq for NonZeroU16

impl StructuralPartialEq for NonZeroU32

impl StructuralPartialEq for NonZeroU64

impl StructuralPartialEq for NonZeroU128

impl StructuralPartialEq for NonZeroUsize

impl StructuralPartialEq for ParseFloatError

impl StructuralPartialEq for ParseIntError

impl StructuralPartialEq for TryFromIntError

impl StructuralPartialEq for RangeFull

impl StructuralPartialEq for UCred

impl StructuralPartialEq for StripPrefixError

impl StructuralPartialEq for ExitStatus

impl StructuralPartialEq for ExitStatusError

impl StructuralPartialEq for Output

impl StructuralPartialEq for ParseBoolError

impl StructuralPartialEq for Utf8Error

impl StructuralPartialEq for FromUtf8Error

impl StructuralPartialEq for RecvError

impl StructuralPartialEq for WaitTimeoutResult

impl StructuralPartialEq for RawWaker

impl StructuralPartialEq for RawWakerVTable

impl StructuralPartialEq for AccessError

impl StructuralPartialEq for ThreadId

impl StructuralPartialEq for Duration

impl StructuralPartialEq for Instant

impl StructuralPartialEq for SystemTime

impl StructuralPartialEq for PhantomPinned

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

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

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

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

impl<Idx> StructuralPartialEq for Range<Idx>

impl<Idx> StructuralPartialEq for RangeFrom<Idx>

impl<Idx> StructuralPartialEq for RangeInclusive<Idx>

impl<Idx> StructuralPartialEq for RangeTo<Idx>

impl<T> StructuralPartialEq for ManuallyDrop<T> where
T: ?Sized,

impl<T> StructuralPartialEq for PhantomData<T> where
T: ?Sized,