Trait StructuralPartialEq

Source

pub trait StructuralPartialEq { }

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

Expand description

Required trait for constants used in pattern matches.

Constants are only allowed as patterns if (a) their type implements PartialEq, and (b) interpreting the value of the constant as a pattern is equivalent to calling PartialEq. This ensures that constants used as patterns cannot expose implementation details in an unexpected way or cause semver hazards.

This trait ensures point (b). Any type that derives PartialEq automatically implements this trait.

Implementing this trait (which is unstable) is a way for type authors to explicitly allow comparing const values of this type; that operation will recursively compare all fields (including private fields), even if that behavior differs from PartialEq. This can make it semver-breaking to add further private fields to a type.

StructuralPartialEq

Trait StructuralPartialEq Copy item path

Implementors§

impl StructuralPartialEq for byte_slice_cast::Error

impl StructuralPartialEq for Case

impl StructuralPartialEq for PathError

impl StructuralPartialEq for TypeDefPrimitive

impl StructuralPartialEq for MetaForm

impl StructuralPartialEq for PortableForm

impl StructuralPartialEq for scale_info::prelude::cmp::Ordering

impl StructuralPartialEq for TryReserveErrorKind

impl StructuralPartialEq for scale_info::prelude::fmt::Alignment

impl StructuralPartialEq for DebugAsHex

impl StructuralPartialEq for Sign

impl StructuralPartialEq for FpCategory

impl StructuralPartialEq for IntErrorKind

impl StructuralPartialEq for scale_info::prelude::sync::atomic::Ordering

impl StructuralPartialEq for RecvTimeoutError

impl StructuralPartialEq for TryRecvError

impl StructuralPartialEq for AsciiChar

impl StructuralPartialEq for FromBytesWithNulError

impl StructuralPartialEq for AtomicOrdering

impl StructuralPartialEq for SimdAlign

impl StructuralPartialEq for IpAddr

impl StructuralPartialEq for Ipv6MulticastScope

impl StructuralPartialEq for SocketAddr

impl StructuralPartialEq for GetDisjointMutError

impl StructuralPartialEq for SearchStep

impl StructuralPartialEq for BacktraceStatus

impl StructuralPartialEq for VarError

impl StructuralPartialEq for SeekFrom

impl StructuralPartialEq for ErrorKind

impl StructuralPartialEq for Shutdown

impl StructuralPartialEq for BacktraceStyle

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 Lsb0

impl StructuralPartialEq for Msb0

impl StructuralPartialEq for TryGetError

impl StructuralPartialEq for SplicedStr

impl StructuralPartialEq for OptionBool

impl StructuralPartialEq for parity_scale_codec::error::Error

impl StructuralPartialEq for IgnoredAny

impl StructuralPartialEq for serde_core::de::value::Error

impl StructuralPartialEq for Const

impl StructuralPartialEq for Mut

impl StructuralPartialEq for NullPtrError

impl StructuralPartialEq for PortableRegistry

impl StructuralPartialEq for PortableType

impl StructuralPartialEq for Registry

impl StructuralPartialEq for UnorderedKeyError

impl StructuralPartialEq for TryReserveError

impl StructuralPartialEq for scale_info::prelude::fmt::Error

impl StructuralPartialEq for FormattingOptions

impl StructuralPartialEq for Assume

impl StructuralPartialEq for ParseFloatError

impl StructuralPartialEq for ParseIntError

impl StructuralPartialEq for TryFromIntError

impl StructuralPartialEq for RangeFull

impl StructuralPartialEq for FromUtf8Error

impl StructuralPartialEq for String

impl StructuralPartialEq for RecvError

impl StructuralPartialEq for WaitTimeoutResult

impl StructuralPartialEq for Duration

impl StructuralPartialEq for Instant

impl StructuralPartialEq for SystemTime

Trait StructuralPartialEq

impl<'a, T, O> StructuralPartialEq for IterOnes<'a, T, O>
where T: 'a + BitStore, O: BitOrder,

impl<'a, T, O> StructuralPartialEq for IterZeros<'a, T, O>
where T: 'a + BitStore, O: BitOrder,

impl<Inner> StructuralPartialEq for Frozen<Inner>
where Inner: Mutability,

impl<R> StructuralPartialEq for BitEnd<R>
where R: BitRegister,

impl<R> StructuralPartialEq for BitIdx<R>
where R: BitRegister,

impl<R> StructuralPartialEq for BitIdxError<R>
where R: BitRegister,

impl<R> StructuralPartialEq for BitMask<R>
where R: BitRegister,

impl<R> StructuralPartialEq for BitPos<R>
where R: BitRegister,

impl<R> StructuralPartialEq for BitSel<R>
where R: BitRegister,