pub trait Eq: PartialEq { }
std
only.Expand description
Trait for comparisons corresponding to equivalence relations.
This means, that in addition to a == b
and a != b
being strict inverses,
the relation must be (for all a
, b
and c
):
- reflexive:
a == a
; - symmetric:
a == b
impliesb == a
(required byPartialEq
as well); and - transitive:
a == b
andb == c
impliesa == c
(required byPartialEq
as well).
This property cannot be checked by the compiler, and therefore Eq
implies
PartialEq
, and has no extra methods.
Violating this property is a logic error. The behavior resulting from a logic error is not
specified, but users of the trait must ensure that such logic errors do not result in
undefined behavior. This means that unsafe
code must not rely on the correctness of these
methods.
Implement Eq
in addition to PartialEq
if it’s guaranteed that
PartialEq::eq(a, a)
always returns true
(reflexivity), in addition to
the symmetric and transitive properties already required by PartialEq
.
§Derivable
This trait can be used with #[derive]
. When derive
d, because Eq
has
no extra methods, it is only informing the compiler that this is an
equivalence relation rather than a partial equivalence relation. Note that
the derive
strategy requires all fields are Eq
, which isn’t
always desired.
§How can I implement Eq
?
If you cannot use the derive
strategy, specify that your type implements
Eq
, which has no methods:
enum BookFormat { Paperback, Hardback, Ebook }
struct Book {
isbn: i32,
format: BookFormat,
}
impl PartialEq for Book {
fn eq(&self, other: &Self) -> bool {
self.isbn == other.isbn
}
}
impl Eq for Book {}
Object Safety§
Implementors§
impl Eq for RelocationKind
impl Eq for RelocationTarget
impl Eq for CustomSectionProtection
impl Eq for Symbol
impl Eq for CpuFeature
impl Eq for CompiledFunctionUnwindInfo
impl Eq for Aarch64Architecture
impl Eq for Architecture
impl Eq for BinaryFormat
impl Eq for CallingConvention
impl Eq for wasmer_types::Endianness
impl Eq for Environment
impl Eq for ExportIndex
impl Eq for ExternType
impl Eq for HashAlgorithm
impl Eq for ImportIndex
impl Eq for LibCall
impl Eq for MemoryStyle
impl Eq for ModuleHash
impl Eq for Mutability
impl Eq for OperatingSystem
impl Eq for PointerWidth
impl Eq for TableStyle
impl Eq for TrapCode
impl Eq for Type
impl Eq for Vendor
impl Eq for MemoryError
impl Eq for Infallible
impl Eq for wasmer_types::lib::std::fmt::Alignment
impl Eq for wasmer_types::lib::std::sync::atomic::Ordering
impl Eq for RecvTimeoutError
impl Eq for TryRecvError
impl Eq for wasmer_types::lib::std::cmp::Ordering
impl Eq for TryReserveErrorKind
impl Eq for AsciiChar
impl Eq for IpAddr
impl Eq for Ipv6MulticastScope
impl Eq for SocketAddr
impl Eq for FpCategory
impl Eq for IntErrorKind
impl Eq for SearchStep
impl Eq for BacktraceStatus
impl Eq for VarError
impl Eq for std::io::SeekFrom
impl Eq for std::io::error::ErrorKind
impl Eq for Shutdown
impl Eq for BacktraceStyle
impl Eq for ParseAlphabetError
impl Eq for DecodeError
impl Eq for DecodeSliceError
impl Eq for EncodeSliceError
impl Eq for DecodePaddingMode
impl Eq for FlushCompress
impl Eq for FlushDecompress
impl Eq for Status
impl Eq for hashbrown::TryReserveError
impl Eq for hashbrown::TryReserveError
impl Eq for fsconfig_command
impl Eq for membarrier_cmd
impl Eq for membarrier_cmd_flag
impl Eq for memmap2::advice::Advice
impl Eq for CompressionStrategy
impl Eq for TDEFLFlush
impl Eq for TDEFLStatus
impl Eq for CompressionLevel
impl Eq for DataFormat
impl Eq for MZError
impl Eq for MZFlush
impl Eq for MZStatus
impl Eq for TINFLStatus
impl Eq for ArchivedIpAddr
impl Eq for ArchivedSocketAddr
impl Eq for OffsetError
impl Eq for rustix::backend::fs::types::Advice
impl Eq for rustix::backend::fs::types::FileType
impl Eq for FlockOperation
impl Eq for rustix::fs::seek_from::SeekFrom
impl Eq for Direction
impl Eq for InstanceType
impl Eq for Op
impl Eq for serde_cbor::error::Category
impl Eq for serde_cbor::value::Value
impl Eq for serde_json::error::Category
impl Eq for serde_json::value::Value
impl Eq for serde_yaml::value::Value
impl Eq for EntryType
impl Eq for HeaderMode
impl Eq for CDataModel
impl Eq for Size
impl Eq for target_lexicon::parse_error::ParseError
impl Eq for ArmArchitecture
impl Eq for CustomVendor
impl Eq for Mips32Architecture
impl Eq for Mips64Architecture
impl Eq for Riscv32Architecture
impl Eq for Riscv64Architecture
impl Eq for X86_32Architecture
impl Eq for Offset
impl Eq for toml_edit::ser::Error
impl Eq for toml_edit::ser::Error
impl Eq for BidiClass
impl Eq for IsNormalized
impl Eq for yaml_break_t
impl Eq for yaml_emitter_state_t
impl Eq for yaml_encoding_t
impl Eq for yaml_error_type_t
impl Eq for yaml_event_type_t
impl Eq for yaml_mapping_style_t
impl Eq for yaml_node_type_t
impl Eq for yaml_parser_state_t
impl Eq for yaml_scalar_style_t
impl Eq for yaml_sequence_style_t
impl Eq for yaml_token_type_t
impl Eq for Origin
impl Eq for url::parser::ParseError
impl Eq for SyntaxViolation
impl Eq for AppScalingModeV1
impl Eq for HealthCheckV1
impl Eq for Abi
impl Eq for Bindings
impl Eq for FileKind
impl Eq for wasmer_config::package::named_package_ident::Tag
impl Eq for PackageId
impl Eq for PackageIdent
impl Eq for PackageSource
impl Eq for AtomSignature
impl Eq for webc::v2::checksum::ChecksumAlgorithm
impl Eq for webc::v2::read::volume_header::VolumeHeaderError
impl Eq for webc::v2::tags::Tag
impl Eq for webc::v3::checksum::ChecksumAlgorithm
impl Eq for webc::v3::read::volume_header::VolumeHeaderError
impl Eq for webc::v3::tags::Tag
impl Eq for winnow::binary::Endianness
impl Eq for winnow::binary::Endianness
impl Eq for winnow::error::ErrorKind
impl Eq for winnow::error::ErrorKind
impl Eq for winnow::error::Needed
impl Eq for winnow::error::Needed
impl Eq for winnow::error::StrContext
impl Eq for winnow::error::StrContext
impl Eq for winnow::error::StrContextValue
impl Eq for winnow::error::StrContextValue
impl Eq for winnow::stream::CompareResult
impl Eq for winnow::stream::CompareResult
impl Eq for bool
impl Eq for char
impl Eq for i8
impl Eq for i16
impl Eq for i32
impl Eq for i64
impl Eq for i128
impl Eq for isize
impl Eq for !
impl Eq for str
impl Eq for u8
impl Eq for u16
impl Eq for u32
impl Eq for u64
impl Eq for u128
impl Eq for ()
impl Eq for usize
impl Eq for FunctionAddressMap
impl Eq for InstructionAddressMap
impl Eq for Compilation
impl Eq for CompiledFunction
impl Eq for CompiledFunctionFrameInfo
impl Eq for Dwarf
impl Eq for FunctionBody
impl Eq for CompileModuleInfo
impl Eq for Relocation
impl Eq for CustomSection
impl Eq for SectionBody
impl Eq for SectionIndex
impl Eq for Target
impl Eq for wasmer_types::Bytes
impl Eq for CustomSectionIndex
impl Eq for DataIndex
impl Eq for DataInitializerLocation
impl Eq for ElemIndex
impl Eq for Features
impl Eq for FunctionIndex
impl Eq for FunctionType
impl Eq for GlobalIndex
impl Eq for GlobalType
impl Eq for ImportKey
impl Eq for LocalFunctionIndex
impl Eq for LocalGlobalIndex
impl Eq for LocalMemoryIndex
impl Eq for LocalTableIndex
impl Eq for MemoryIndex
impl Eq for MemoryType
impl Eq for ModuleInfo
impl Eq for OwnedDataInitializer
impl Eq for PageCountOutOfRange
impl Eq for Pages
impl Eq for SignatureIndex
impl Eq for SourceLoc
impl Eq for StoreId
impl Eq for TableIndex
impl Eq for TableInitializer
impl Eq for TableType
impl Eq for TrapInformation
impl Eq for Triple
impl Eq for V128
impl Eq for TypeId
impl Eq for wasmer_types::lib::std::fmt::Error
impl Eq for PhantomPinned
impl Eq for Assume
impl Eq for RangeFull
impl Eq for wasmer_types::lib::std::ptr::Alignment
impl Eq for FromUtf8Error
impl Eq for String
impl Eq for RecvError
impl Eq for WaitTimeoutResult
impl Eq for UnorderedKeyError
impl Eq for alloc::collections::TryReserveError
impl Eq for CString
impl Eq for FromVecWithNulError
impl Eq for IntoStringError
impl Eq for NulError
impl Eq for Layout
impl Eq for LayoutError
impl Eq for AllocError
impl Eq for CharTryFromError
impl Eq for ParseCharError
impl Eq for DecodeUtf16Error
impl Eq for TryFromCharError
impl Eq for CpuidResult
impl Eq for CStr
impl Eq for FromBytesUntilNulError
impl Eq for FromBytesWithNulError
impl Eq for Ipv4Addr
impl Eq for Ipv6Addr
impl Eq for AddrParseError
impl Eq for SocketAddrV4
impl Eq for SocketAddrV6
impl Eq for ParseFloatError
impl Eq for ParseIntError
impl Eq for TryFromIntError
impl Eq for ParseBoolError
impl Eq for core::str::error::Utf8Error
impl Eq for Duration
impl Eq for TryFromFloatSecsError
impl Eq for OsStr
impl Eq for OsString
impl Eq for std::fs::FileType
impl Eq for Permissions
impl Eq for UCred
impl Eq for Components<'_>
impl Eq for Path
impl Eq for PathBuf
impl Eq for StripPrefixError
impl Eq for ExitStatus
impl Eq for ExitStatusError
impl Eq for Output
impl Eq for AccessError
impl Eq for ThreadId
impl Eq for Instant
impl Eq for SystemTime
impl Eq for Alphabet
impl Eq for DecodeMetadata
impl Eq for block_buffer::Error
impl Eq for bytes::bytes::Bytes
impl Eq for BytesMut
impl Eq for ByteSize
impl Eq for InvalidLength
impl Eq for InvalidBufferSize
impl Eq for Rng
impl Eq for FileTime
impl Eq for Compression
impl Eq for getrandom::error::Error
impl Eq for indexmap::TryReserveError
impl Eq for __kernel_timespec
general
only.impl Eq for StreamResult
impl Eq for BigEndian<char>
impl Eq for BigEndian<f32>
impl Eq for BigEndian<f64>
impl Eq for BigEndian<i16>
impl Eq for BigEndian<i32>
impl Eq for BigEndian<i64>
impl Eq for BigEndian<i128>
impl Eq for BigEndian<u16>
impl Eq for BigEndian<u32>
impl Eq for BigEndian<u64>
impl Eq for BigEndian<u128>
impl Eq for BigEndian<NonZero<i16>>
impl Eq for BigEndian<NonZero<i32>>
impl Eq for BigEndian<NonZero<i64>>
impl Eq for BigEndian<NonZero<i128>>
impl Eq for BigEndian<NonZero<u16>>
impl Eq for BigEndian<NonZero<u32>>
impl Eq for BigEndian<NonZero<u64>>
impl Eq for BigEndian<NonZero<u128>>
impl Eq for LittleEndian<char>
impl Eq for LittleEndian<f32>
impl Eq for LittleEndian<f64>
impl Eq for LittleEndian<i16>
impl Eq for LittleEndian<i32>
impl Eq for LittleEndian<i64>
impl Eq for LittleEndian<i128>
impl Eq for LittleEndian<u16>
impl Eq for LittleEndian<u32>
impl Eq for LittleEndian<u64>
impl Eq for LittleEndian<u128>
impl Eq for LittleEndian<NonZero<i16>>
impl Eq for LittleEndian<NonZero<i32>>
impl Eq for LittleEndian<NonZero<i64>>
impl Eq for LittleEndian<NonZero<i128>>
impl Eq for LittleEndian<NonZero<u16>>
impl Eq for LittleEndian<NonZero<u32>>
impl Eq for LittleEndian<NonZero<u64>>
impl Eq for LittleEndian<NonZero<u128>>
impl Eq for NativeEndian<char>
impl Eq for NativeEndian<f32>
impl Eq for NativeEndian<f64>
impl Eq for NativeEndian<i16>
impl Eq for NativeEndian<i32>
impl Eq for NativeEndian<i64>
impl Eq for NativeEndian<i128>
impl Eq for NativeEndian<u16>
impl Eq for NativeEndian<u32>
impl Eq for NativeEndian<u64>
impl Eq for NativeEndian<u128>
impl Eq for NativeEndian<NonZero<i16>>
impl Eq for NativeEndian<NonZero<i32>>
impl Eq for NativeEndian<NonZero<i64>>
impl Eq for NativeEndian<NonZero<i128>>
impl Eq for NativeEndian<NonZero<u16>>
impl Eq for NativeEndian<NonZero<u32>>
impl Eq for NativeEndian<NonZero<u64>>
impl Eq for NativeEndian<NonZero<u128>>
impl Eq for ArchivedCString
impl Eq for ArchivedIpv4Addr
impl Eq for ArchivedIpv6Addr
impl Eq for ArchivedSocketAddrV4
impl Eq for ArchivedSocketAddrV6
impl Eq for ArchivedOptionNonZeroI8
impl Eq for ArchivedOptionNonZeroI16
impl Eq for ArchivedOptionNonZeroI32
impl Eq for ArchivedOptionNonZeroI64
impl Eq for ArchivedOptionNonZeroI128
impl Eq for ArchivedOptionNonZeroU8
impl Eq for ArchivedOptionNonZeroU16
impl Eq for ArchivedOptionNonZeroU32
impl Eq for ArchivedOptionNonZeroU64
impl Eq for ArchivedOptionNonZeroU128
impl Eq for ArchivedString
impl Eq for ArchivedDuration
impl Eq for CreateFlags
impl Eq for WatchFlags
impl Eq for Access
impl Eq for AtFlags
impl Eq for FallocateFlags
impl Eq for MemfdFlags
impl Eq for Mode
impl Eq for OFlags
impl Eq for RenameFlags
impl Eq for ResolveFlags
impl Eq for SealFlags
impl Eq for StatVfsMountFlags
impl Eq for StatxFlags
impl Eq for Errno
impl Eq for DupFlags
impl Eq for FdFlags
impl Eq for ReadWriteFlags
impl Eq for MountFlags
impl Eq for MountPropagationFlags
impl Eq for UnmountFlags
impl Eq for XattrFlags
impl Eq for Opcode
impl Eq for Gid
impl Eq for Uid
impl Eq for BuildMetadata
impl Eq for Comparator
impl Eq for Prerelease
impl Eq for semver::Version
impl Eq for VersionReq
impl Eq for Map<String, Value>
impl Eq for Number
impl Eq for Mapping
impl Eq for serde_yaml::value::tagged::Tag
impl Eq for simdutf8::basic::Utf8Error
impl Eq for simdutf8::compat::Utf8Error
impl Eq for DefaultToHost
impl Eq for DefaultToUnknown
impl Eq for toml::de::Error
impl Eq for toml::de::Error
impl Eq for toml::ser::Error
impl Eq for toml::ser::Error
impl Eq for Date
impl Eq for Datetime
impl Eq for Time
impl Eq for toml_edit::de::Error
impl Eq for toml_edit::de::Error
impl Eq for toml_edit::error::TomlError
impl Eq for toml_edit::internal_string::InternalString
impl Eq for toml_edit::internal_string::InternalString
impl Eq for toml_edit::key::Key
impl Eq for toml_edit::key::Key
impl Eq for toml_edit::parser::errors::TomlError
impl Eq for toml_edit::raw_string::RawString
impl Eq for toml_edit::raw_string::RawString
impl Eq for toml_edit::repr::Decor
impl Eq for toml_edit::repr::Decor
impl Eq for toml_edit::repr::Repr
impl Eq for toml_edit::repr::Repr
impl Eq for ATerm
impl Eq for B0
impl Eq for B1
impl Eq for Z0
impl Eq for Equal
impl Eq for Greater
impl Eq for Less
impl Eq for UTerm
impl Eq for Level
impl Eq for OpaqueOrigin
impl Eq for Url
URLs compare like their serialization.
impl Eq for HealthCheckHttpV1
impl Eq for AppConfigCapabilityMapV1
impl Eq for AppConfigCapabilityMemoryV1
impl Eq for AppConfigV1
impl Eq for AppScalingConfigV1
impl Eq for AppScheduledTask
impl Eq for AppVolume
impl Eq for AppVolumeMount
impl Eq for CargoWasmerPackageAnnotation
impl Eq for Sha256Hash
impl Eq for PackageParseError
impl Eq for NamedPackageIdent
impl Eq for PackageHash
impl Eq for NamedPackageId
impl Eq for FileCommandAnnotations
impl Eq for Module
impl Eq for WaiBindings
impl Eq for WitBindings
impl Eq for webc::metadata::annotations::Atom
impl Eq for FileSystemMapping
impl Eq for FileSystemMappings
impl Eq for VolumeSpecificPath
impl Eq for Wapm
impl Eq for Wasi
impl Eq for Wcgi
impl Eq for webc::metadata::Atom
impl Eq for AtomWithoutSignature
impl Eq for Binding
impl Eq for Command
impl Eq for PathSegment
impl Eq for PathSegments
impl Eq for webc::timestamps::Timestamps
impl Eq for webc::v2::checksum::Checksum
impl Eq for webc::v2::index::Index
impl Eq for webc::v2::index::IndexEntry
impl Eq for webc::v2::read::dir_entry::FileEntry
impl Eq for webc::v2::signature::Signature
impl Eq for webc::v2::span::Span
impl Eq for webc::v2::write::writer::WritingAtoms
impl Eq for webc::v2::write::writer::WritingManifest
impl Eq for webc::v2::write::writer::WritingVolumes
impl Eq for webc::v3::checksum::Checksum
impl Eq for webc::v3::index::Index
impl Eq for webc::v3::index::IndexEntry
impl Eq for webc::v3::read::dir_entry::FileEntry
impl Eq for webc::v3::signature::Signature
impl Eq for webc::v3::span::Span
impl Eq for webc::v3::timestamps::Timestamps
impl Eq for webc::v3::write::writer::WritingAtoms
impl Eq for webc::v3::write::writer::WritingManifest
impl Eq for webc::v3::write::writer::WritingVolumes
impl Eq for webc::version::Version
impl Eq for winnow::stream::BStr
impl Eq for winnow::stream::BStr
impl Eq for winnow::stream::Bytes
impl Eq for winnow::stream::Bytes
impl Eq for winnow::stream::Range
impl Eq for winnow::stream::Range
impl<'a> Eq for CompiledFunctionUnwindInfoReference<'a>
impl<'a> Eq for Component<'a>
impl<'a> Eq for Prefix<'a>
impl<'a> Eq for Location<'a>
impl<'a> Eq for Utf8Chunk<'a>
impl<'a> Eq for PrefixComponent<'a>
impl<'a, 'b> Eq for Builder<'a, 'b>
impl<'k> Eq for toml_edit::key::KeyMut<'k>
impl<'k> Eq for toml_edit::key::KeyMut<'k>
impl<'s, T> Eq for SliceVec<'s, T>where
T: Eq,
impl<'volume> Eq for webc::v2::read::dir_entry::DirEntry<'volume>
impl<'volume> Eq for webc::v3::read::dir_entry::DirEntry<'volume>
impl<'volume> Eq for webc::v2::read::dir_entry::Directory<'volume>
impl<'volume> Eq for webc::v3::read::dir_entry::Directory<'volume>
impl<A> Eq for TinyVec<A>
impl<A> Eq for &A
impl<A> Eq for &mut A
impl<A> Eq for ArrayVec<A>
impl<B> Eq for Cow<'_, B>
impl<B, C> Eq for ControlFlow<B, C>
impl<C> Eq for VerboseErrorKind<C>where
C: Eq,
impl<Dyn> Eq for wasmer_types::lib::std::ptr::DynMetadata<Dyn>where
Dyn: ?Sized,
impl<Dyn> Eq for ptr_meta::DynMetadata<Dyn>where
Dyn: ?Sized,
impl<E> Eq for winnow::error::ErrMode<E>where
E: Eq,
impl<E> Eq for winnow::error::ErrMode<E>where
E: Eq,
impl<F> Eq for Fwhere
F: FnPtr,
impl<H> Eq for BuildHasherDefault<H>
impl<I> Eq for winnow::error::InputError<I>
impl<I> Eq for winnow::error::InputError<I>
impl<I> Eq for winnow::stream::Located<I>where
I: Eq,
impl<I> Eq for winnow::stream::Located<I>where
I: Eq,
impl<I> Eq for winnow::stream::Partial<I>where
I: Eq,
impl<I> Eq for winnow::stream::Partial<I>where
I: Eq,
impl<I, C> Eq for VerboseError<I, C>
impl<I, E> Eq for winnow::error::ParseError<I, E>
impl<I, E> Eq for winnow::error::ParseError<I, E>
impl<I, S> Eq for winnow::stream::Stateful<I, S>
impl<I, S> Eq for winnow::stream::Stateful<I, S>
impl<Idx> Eq for wasmer_types::lib::std::ops::Range<Idx>where
Idx: Eq,
impl<Idx> Eq for wasmer_types::lib::std::ops::RangeFrom<Idx>where
Idx: Eq,
impl<Idx> Eq for wasmer_types::lib::std::ops::RangeInclusive<Idx>where
Idx: Eq,
impl<Idx> Eq for RangeTo<Idx>where
Idx: Eq,
impl<Idx> Eq for RangeToInclusive<Idx>where
Idx: Eq,
impl<Idx> Eq for core::range::Range<Idx>where
Idx: Eq,
impl<Idx> Eq for core::range::RangeFrom<Idx>where
Idx: Eq,
impl<Idx> Eq for core::range::RangeInclusive<Idx>where
Idx: Eq,
impl<K> Eq for ArchivedBTreeSet<K>where
K: Eq,
impl<K> Eq for ArchivedHashSet<K>
impl<K, V> Eq for SecondaryMap<K, V>
impl<K, V> Eq for indexmap::map::slice::Slice<K, V>
impl<K, V> Eq for ArchivedBTreeMap<K, V>
impl<K, V> Eq for ArchivedHashMap<K, V>
impl<K, V> Eq for Entry<K, V>
impl<K, V, A> Eq for BTreeMap<K, V, A>
impl<K, V, S> Eq for std::collections::hash::map::HashMap<K, V, S>
impl<K, V, S> Eq for indexmap::map::IndexMap<K, V, S>
impl<K, V, S> Eq for indexmap::map::IndexMap<K, V, S>
impl<K, V, S, A> Eq for hashbrown::map::HashMap<K, V, S, A>
impl<K, V, S, A> Eq for hashbrown::map::HashMap<K, V, S, A>
impl<K, V: Eq> Eq for PrimaryMap<K, V>
impl<Ptr> Eq for Pin<Ptr>
impl<S> Eq for Host<S>where
S: Eq,
impl<Storage> Eq for __BindgenBitfieldUnit<Storage>where
Storage: Eq,
impl<T> Eq for Bound<T>where
T: Eq,
impl<T> Eq for TrySendError<T>where
T: Eq,
impl<T> Eq for Option<T>where
T: Eq,
impl<T> Eq for Poll<T>where
T: Eq,
impl<T> Eq for ArchivedOption<T>where
T: Eq,
impl<T> Eq for SingleOrVec<T>where
T: Eq,
impl<T> Eq for *const Twhere
T: ?Sized,
impl<T> Eq for *mut Twhere
T: ?Sized,
impl<T> Eq for [T]where
T: Eq,
impl<T> Eq for (T₁, T₂, …, Tₙ)
This trait is implemented for tuples up to twelve items long.