Trait otter::prelude::cmp::Eq 1.0.0[−][src]
pub trait Eq: PartialEq<Self> { }
Expand description
Trait for equality comparisons which are equivalence relations.
This means, that in addition to a == b
and a != b
being strict inverses, the equality must
be (for all a
, b
and c
):
- reflexive:
a == a
; - symmetric:
a == b
impliesb == a
; and - transitive:
a == b
andb == c
impliesa == c
.
This property cannot be checked by the compiler, and therefore Eq
implies
PartialEq
, and has no extra methods.
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 {}
Implementations on Foreign Types
impl<Ret, A, B, C, D, E, F, G, H, I, J, K, L> Eq for unsafe fn(A, B, C, D, E, F, G, H, I, J, K, L) -> Ret
[src]impl<Ret, A, B, C, D, E, F, G, H> Eq for unsafe extern "C" fn(A, B, C, D, E, F, G, H, ...) -> Ret
[src]impl<Ret, A, B, C, D, E, F, G, H, I, J, K> Eq for unsafe extern "C" fn(A, B, C, D, E, F, G, H, I, J, K) -> Ret
[src]impl<A, B, C, D, E, F, G, H, I, J, K> Eq for (A, B, C, D, E, F, G, H, I, J, K) where
C: Eq,
K: Eq + ?Sized,
E: Eq,
F: Eq,
I: Eq,
A: Eq,
B: Eq,
G: Eq,
H: Eq,
D: Eq,
J: Eq,
[src]impl<Ret, A, B, C, D, E, F, G, H, I, J, K, L> Eq for fn(A, B, C, D, E, F, G, H, I, J, K, L) -> Ret
[src]impl<Ret, A, B, C, D, E, F, G, H, I> Eq for unsafe extern "C" fn(A, B, C, D, E, F, G, H, I, ...) -> Ret
[src]impl<A, B, C, D, E, F, G, H> Eq for (A, B, C, D, E, F, G, H) where
C: Eq,
E: Eq,
F: Eq,
A: Eq,
B: Eq,
G: Eq,
H: Eq + ?Sized,
D: Eq,
[src]impl<A, B, C, D, E, F, G> Eq for (A, B, C, D, E, F, G) where
C: Eq,
E: Eq,
F: Eq,
A: Eq,
B: Eq,
G: Eq + ?Sized,
D: Eq,
[src]impl<Ret, A, B, C, D, E, F, G, H, I, J> Eq for unsafe extern "C" fn(A, B, C, D, E, F, G, H, I, J, ...) -> Ret
[src]impl<Ret, A, B, C, D, E, F, G, H, I, J, K, L> Eq for extern "C" fn(A, B, C, D, E, F, G, H, I, J, K, L, ...) -> Ret
[src]impl<Ret, A, B, C, D, E, F, G, H, I, J, K, L> Eq for unsafe extern "C" fn(A, B, C, D, E, F, G, H, I, J, K, L) -> Ret
[src]impl<A, B, C, D, E, F, G, H, I> Eq for (A, B, C, D, E, F, G, H, I) where
C: Eq,
E: Eq,
F: Eq,
I: Eq + ?Sized,
A: Eq,
B: Eq,
G: Eq,
H: Eq,
D: Eq,
[src]impl<A, B, C, D, E, F> Eq for (A, B, C, D, E, F) where
C: Eq,
E: Eq,
F: Eq + ?Sized,
A: Eq,
B: Eq,
D: Eq,
[src]impl<Ret, A, B, C, D, E, F, G, H, I, J> Eq for unsafe extern "C" fn(A, B, C, D, E, F, G, H, I, J) -> Ret
[src]impl<Ret, A, B, C, D, E, F, G, H, I> Eq for extern "C" fn(A, B, C, D, E, F, G, H, I, ...) -> Ret
[src]impl<A, B, C, D, E, F, G, H, I, J, K, L> Eq for (A, B, C, D, E, F, G, H, I, J, K, L) where
C: Eq,
K: Eq,
E: Eq,
F: Eq,
I: Eq,
A: Eq,
B: Eq,
G: Eq,
H: Eq,
D: Eq,
L: Eq + ?Sized,
J: Eq,
[src]impl<Ret, A, B, C, D, E, F, G, H, I, J, K> Eq for unsafe fn(A, B, C, D, E, F, G, H, I, J, K) -> Ret
[src]impl<Ret, A, B, C, D, E, F, G, H, I, J, K> Eq for extern "C" fn(A, B, C, D, E, F, G, H, I, J, K, ...) -> Ret
[src]impl<Ret, A, B, C, D, E, F, G, H, I, J> Eq for extern "C" fn(A, B, C, D, E, F, G, H, I, J) -> Ret
[src]impl<Ret, A, B, C, D, E, F, G, H, I> Eq for unsafe extern "C" fn(A, B, C, D, E, F, G, H, I) -> Ret
[src]impl<Ret, A, B, C, D, E, F, G, H, I, J> Eq for extern "C" fn(A, B, C, D, E, F, G, H, I, J, ...) -> Ret
[src]impl<Ret, A, B, C, D, E, F, G, H, I, J, K, L> Eq for unsafe extern "C" fn(A, B, C, D, E, F, G, H, I, J, K, L, ...) -> Ret
[src]impl<Ret, A, B, C, D, E, F, G, H, I, J, K> Eq for unsafe extern "C" fn(A, B, C, D, E, F, G, H, I, J, K, ...) -> Ret
[src]impl<Ret, A, B, C, D, E, F, G, H, I, J, K> Eq for extern "C" fn(A, B, C, D, E, F, G, H, I, J, K) -> Ret
[src]impl<A, B, C, D, E, F, G, H, I, J> Eq for (A, B, C, D, E, F, G, H, I, J) where
C: Eq,
E: Eq,
F: Eq,
I: Eq,
A: Eq,
B: Eq,
G: Eq,
H: Eq,
D: Eq,
J: Eq + ?Sized,
[src]impl<Ret, A, B, C, D, E, F, G, H, I, J, K, L> Eq for extern "C" fn(A, B, C, D, E, F, G, H, I, J, K, L) -> Ret
[src]impl Eq for B1
impl Eq for Less
impl Eq for ATerm
impl Eq for B0
impl Eq for Z0
impl Eq for UTerm
impl Eq for Equal
impl Eq for Greater
impl Eq for ErrorKind
impl Eq for ClassPerlKind
impl Eq for SetFlags
impl Eq for Group
impl Eq for Group
impl Eq for ClassUnicodeOpKind
impl Eq for Class
impl Eq for Literal
impl Eq for RepetitionRange
impl Eq for HirKind
impl Eq for Span
impl Eq for Anchor
impl Eq for Error
impl Eq for SpecialLiteralKind
impl Eq for ClassAscii
impl Eq for WordBoundary
impl Eq for ErrorKind
impl Eq for RepetitionRange
impl Eq for Utf8Range
impl Eq for Alternation
impl Eq for HexLiteralKind
impl Eq for Concat
impl Eq for WithComments
impl Eq for RepetitionOp
impl Eq for Repetition
impl Eq for Literals
impl Eq for ClassPerl
impl Eq for Flag
impl Eq for RepetitionKind
impl Eq for CaptureName
impl Eq for ClassAsciiKind
impl Eq for ClassSetRange
impl Eq for Error
impl Eq for ClassSetItem
impl Eq for Utf8Sequence
impl Eq for ClassBytes
impl Eq for ClassSetBinaryOpKind
impl Eq for Ast
impl Eq for ClassSetBinaryOp
impl Eq for Literal
impl Eq for ClassUnicodeRange
impl Eq for Comment
impl Eq for Flags
impl Eq for AssertionKind
impl Eq for ClassBracketed
impl Eq for RepetitionKind
impl Eq for Class
impl Eq for ClassUnicodeKind
impl Eq for ClassUnicode
impl Eq for GroupKind
impl Eq for ClassUnicode
impl Eq for Error
impl Eq for ClassSetUnion
impl Eq for ClassBytesRange
impl Eq for LiteralKind
impl Eq for Repetition
impl Eq for FlagsItem
impl Eq for Hir
impl Eq for FlagsItemKind
impl Eq for Literal
impl Eq for Position
impl Eq for ClassSet
impl Eq for Assertion
impl Eq for GroupKind
impl Eq for MatchKind
impl Eq for Match
impl Eq for MatchKind
impl Eq for Timestamp
impl Eq for Duration
impl Eq for Color
impl Eq for ColorSpec
impl Eq for ParseColorError
impl Eq for ColorChoice
impl Eq for Error
impl Eq for DwMacro
impl Eq for DwOp
impl Eq for AttributeSpecification
impl Eq for DwOrd
impl Eq for DwLle
impl Eq for DwChildren
impl<R, Offset> Eq for CommonInformationEntry<R, Offset> where
R: Eq + Reader<Offset = Offset>,
Offset: Eq + ReaderOffset,
impl Eq for DwAddr
impl Eq for DwVis
impl Eq for SectionId
impl<R, Offset> Eq for UnitHeader<R, Offset> where
R: Eq + Reader<Offset = Offset>,
Offset: Eq + ReaderOffset,
impl<'bases, Section, R> Eq for CieOrFde<'bases, Section, R> where
R: Eq + Reader,
Section: Eq + UnwindSection<R>,
impl Eq for BaseAddresses
impl Eq for Format
impl<R, Offset> Eq for FileEntry<R, Offset> where
R: Eq + Reader<Offset = Offset>,
Offset: Eq + ReaderOffset,
impl<R, Offset> Eq for LineInstruction<R, Offset> where
R: Eq + Reader<Offset = Offset>,
Offset: Eq + ReaderOffset,
impl Eq for ReaderOffsetId
impl Eq for DwInl
impl Eq for DwId
impl Eq for Encoding
impl Eq for Register
impl<R, Offset> Eq for AttributeValue<R, Offset> where
R: Eq + Reader<Offset = Offset>,
Offset: Eq + ReaderOffset,
impl<R, Offset> Eq for LineProgramHeader<R, Offset> where
R: Eq + Reader<Offset = Offset>,
Offset: Eq + ReaderOffset,
impl<R, Offset> Eq for CompleteLineProgram<R, Offset> where
R: Eq + Reader<Offset = Offset>,
Offset: Eq + ReaderOffset,
impl Eq for RunTimeEndian
impl Eq for DebugTypeSignature
impl Eq for DwEhPe
impl Eq for Pointer
impl Eq for DwoId
impl Eq for LineRow
impl Eq for ValueType
impl Eq for DwTag
impl Eq for DwLne
impl Eq for DwLang
impl Eq for DwRle
impl Eq for ArangeEntry
impl Eq for BigEndian
impl Eq for DwUt
impl<R, Offset> Eq for FrameDescriptionEntry<R, Offset> where
R: Eq + Reader<Offset = Offset>,
Offset: Eq + ReaderOffset,
impl Eq for DwDsc
impl Eq for DwDs
impl Eq for DwVirtuality
impl Eq for Augmentation
impl Eq for LittleEndian
impl Eq for LineEncoding
impl Eq for DwLnct
impl Eq for DwEnd
impl Eq for FileEntryFormat
impl<R, Offset> Eq for IncompleteLineProgram<R, Offset> where
R: Eq + Reader<Offset = Offset>,
Offset: Eq + ReaderOffset,
impl Eq for DwDefaulted
impl Eq for Range
impl Eq for ColumnType
impl<R, Offset> Eq for ArangeHeader<R, Offset> where
R: Eq + Reader<Offset = Offset>,
Offset: Eq + ReaderOffset,
impl<'bases, Section, R> Eq for PartialFrameDescriptionEntry<'bases, Section, R> where
R: Eq + Reader,
Section: Eq + UnwindSection<R>,
<R as Reader>::Offset: Eq,
<Section as UnwindSection<R>>::Offset: Eq,
impl Eq for DwForm
impl Eq for DwAccess
impl Eq for DwarfFileType
impl Eq for DwCfa
impl Eq for Abbreviation
impl<R, Offset> Eq for Operation<R, Offset> where
R: Eq + Reader<Offset = Offset>,
Offset: Eq + ReaderOffset,
impl Eq for DwAt
impl Eq for DwIdx
impl Eq for DwCc
impl Eq for SectionBaseAddresses
impl Eq for DwAte
impl Eq for DwLns
impl<'data> Eq for SymbolMapName<'data>
impl Eq for SymbolSection
impl Eq for BinaryFormat
impl<'data> Eq for CodeView<'data>
impl Eq for ComdatKind
impl Eq for Error
impl Eq for BigEndian
impl Eq for SectionIndex
impl Eq for SectionFlags
impl Eq for CompressionFormat
impl Eq for SectionKind
impl<'data> Eq for Import<'data>
impl Eq for LittleEndian
impl Eq for AddressSize
impl Eq for RelocationKind
impl Eq for RelocationTarget
impl Eq for Architecture
impl Eq for SymbolKind
impl Eq for SymbolIndex
impl<'data> Eq for Export<'data>
impl Eq for ArchiveKind
impl Eq for FileKind
impl<'data> Eq for ObjectMapEntry<'data>
impl Eq for FileFlags
impl Eq for Endianness
impl Eq for SymbolScope
impl<'data> Eq for Bytes<'data>
impl Eq for RelocationEncoding
impl Eq for CompressedFileRange
impl<'data> Eq for CompressedData<'data>
impl Eq for TINFLStatus
impl Eq for MZStatus
impl Eq for CompressionStrategy
impl Eq for TDEFLFlush
impl Eq for TDEFLStatus
impl Eq for MZFlush
impl Eq for DataFormat
impl Eq for CompressionLevel
impl Eq for StreamResult
impl Eq for MZError
impl Eq for RecursiveMode
impl Eq for Op
impl Eq for FileTime
impl Eq for EventMask
impl Eq for WatchDescriptor
impl Eq for WatchMask
impl Eq for Handle
impl Eq for UnparkResult
impl Eq for UnparkToken
impl Eq for ParkToken
impl Eq for RequeueOp
impl Eq for ParkResult
impl Eq for FilterOp
impl Eq for vec128_storage
impl Eq for vec512_storage
impl Eq for vec256_storage
impl Eq for BidiClass
impl Eq for Level
impl Eq for IsNormalized
impl Eq for DisposeOp
impl Eq for ColorType
impl Eq for Transformations
impl Eq for OutputInfo
impl Eq for BitDepth
impl Eq for FilterType
impl Eq for BlendOp
impl Eq for Unit
impl Eq for Compression
impl Eq for MatchingType
impl Eq for SpecialOptions
impl Eq for CompressionOptions
impl Eq for TINFLStatus
impl Eq for MZStatus
impl Eq for StreamResult
impl Eq for CompressionStrategy
impl Eq for CompressionLevel
impl Eq for MZFlush
impl Eq for MZError
impl Eq for DataFormat
impl Eq for TDEFLFlush
impl Eq for TDEFLStatus
impl Eq for PodCastError
impl Eq for GraphemeIncomplete
impl Eq for GraphemeClusterBreak
impl Eq for WordBreak
impl Eq for SentenceBreak
impl Eq for CharRange
impl Eq for UnicodeVersion
impl Eq for FileType
impl Eq for FileTypeDef
impl Eq for WalkState
impl Eq for Error
impl Eq for ErrorKind
impl Eq for Glob
impl Eq for BString
impl Eq for FromUtf8Error
impl Eq for BStr
impl Eq for Utf8Error
URLs compare like their serialization.
impl Eq for GraphemeIncomplete
impl Eq for SentenceBreak
impl Eq for WordBreak
impl Eq for GraphemeClusterBreak
impl Eq for CharRange
impl Eq for UnicodeVersion
Implementors
impl Eq for DecodeErrKind
URLs compare like their serialization.