Trait std::cmp::PartialEq

1.0.0 · source ·
pub trait PartialEq<Rhs = Self>where
    Rhs: ?Sized,{
    // Required method
    fn eq(&self, other: &Rhs) -> bool;

    // Provided method
    fn ne(&self, other: &Rhs) -> bool { ... }
}
Expand description

Trait for equality comparisons.

x.eq(y) can also be written x == y, and x.ne(y) can be written x != y. We use the easier-to-read infix notation in the remainder of this documentation.

This trait allows for partial equality, for types that do not have a full equivalence relation. For example, in floating point numbers NaN != NaN, so floating point types implement PartialEq but not Eq. Formally speaking, when Rhs == Self, this trait corresponds to a partial equivalence relation.

Implementations must ensure that eq and ne are consistent with each other:

  • a != b if and only if !(a == b).

The default implementation of ne provides this consistency and is almost always sufficient. It should not be overridden without very good reason.

If PartialOrd or Ord are also implemented for Self and Rhs, their methods must also be consistent with PartialEq (see the documentation of those traits for the exact requirements). It’s easy to accidentally make them disagree by deriving some of the traits and manually implementing others.

The equality relation == must satisfy the following conditions (for all a, b, c of type A, B, C):

  • Symmetric: if A: PartialEq<B> and B: PartialEq<A>, then a == b implies b == a; and

  • Transitive: if A: PartialEq<B> and B: PartialEq<C> and A: PartialEq<C>, then a == b and b == c implies a == c.

Note that the B: PartialEq<A> (symmetric) and A: PartialEq<C> (transitive) impls are not forced to exist, but these requirements apply whenever they do exist.

Derivable

This trait can be used with #[derive]. When derived on structs, two instances are equal if all fields are equal, and not equal if any fields are not equal. When derived on enums, two instances are equal if they are the same variant and all fields are equal.

How can I implement PartialEq?

An example implementation for a domain in which two books are considered the same book if their ISBN matches, even if the formats differ:

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
    }
}

let b1 = Book { isbn: 3, format: BookFormat::Paperback };
let b2 = Book { isbn: 3, format: BookFormat::Ebook };
let b3 = Book { isbn: 10, format: BookFormat::Paperback };

assert!(b1 == b2);
assert!(b1 != b3);
Run

How can I compare two different types?

The type you can compare with is controlled by PartialEq’s type parameter. For example, let’s tweak our previous code a bit:

// The derive implements <BookFormat> == <BookFormat> comparisons
#[derive(PartialEq)]
enum BookFormat {
    Paperback,
    Hardback,
    Ebook,
}

struct Book {
    isbn: i32,
    format: BookFormat,
}

// Implement <Book> == <BookFormat> comparisons
impl PartialEq<BookFormat> for Book {
    fn eq(&self, other: &BookFormat) -> bool {
        self.format == *other
    }
}

// Implement <BookFormat> == <Book> comparisons
impl PartialEq<Book> for BookFormat {
    fn eq(&self, other: &Book) -> bool {
        *self == other.format
    }
}

let b1 = Book { isbn: 3, format: BookFormat::Paperback };

assert!(b1 == BookFormat::Paperback);
assert!(BookFormat::Ebook != b1);
Run

By changing impl PartialEq for Book to impl PartialEq<BookFormat> for Book, we allow BookFormats to be compared with Books.

A comparison like the one above, which ignores some fields of the struct, can be dangerous. It can easily lead to an unintended violation of the requirements for a partial equivalence relation. For example, if we kept the above implementation of PartialEq<Book> for BookFormat and added an implementation of PartialEq<Book> for Book (either via a #[derive] or via the manual implementation from the first example) then the result would violate transitivity:

#[derive(PartialEq)]
enum BookFormat {
    Paperback,
    Hardback,
    Ebook,
}

#[derive(PartialEq)]
struct Book {
    isbn: i32,
    format: BookFormat,
}

impl PartialEq<BookFormat> for Book {
    fn eq(&self, other: &BookFormat) -> bool {
        self.format == *other
    }
}

impl PartialEq<Book> for BookFormat {
    fn eq(&self, other: &Book) -> bool {
        *self == other.format
    }
}

fn main() {
    let b1 = Book { isbn: 1, format: BookFormat::Paperback };
    let b2 = Book { isbn: 2, format: BookFormat::Paperback };

    assert!(b1 == BookFormat::Paperback);
    assert!(BookFormat::Paperback == b2);

    // The following should hold by transitivity but doesn't.
    assert!(b1 == b2); // <-- PANICS
}
Run

Examples

let x: u32 = 0;
let y: u32 = 1;

assert_eq!(x == y, false);
assert_eq!(x.eq(&y), false);
Run

Required Methods§

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fn eq(&self, other: &Rhs) -> bool

This method tests for self and other values to be equal, and is used by ==.

Provided Methods§

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fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

Implementors§

1.29.0 · source§

impl PartialEq<&str> for OsString

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impl PartialEq<TryReserveError> for hashbrown::TryReserveError

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impl PartialEq<AsciiChar> for AsciiChar

1.65.0 · source§

impl PartialEq<BacktraceStatus> for BacktraceStatus

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impl PartialEq<PrintFmt> for PrintFmt

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impl PartialEq<TryReserveErrorKind> for TryReserveErrorKind

1.34.0 · source§

impl PartialEq<Infallible> for Infallible

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impl PartialEq<VarError> for VarError

1.28.0 · source§

impl PartialEq<Alignment> for std::fmt::Alignment

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impl PartialEq<SeekFrom> for SeekFrom

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impl PartialEq<ErrorKind> for ErrorKind

1.7.0 · source§

impl PartialEq<IpAddr> for IpAddr

1.16.0 · source§

impl PartialEq<IpAddr> for Ipv4Addr

1.16.0 · source§

impl PartialEq<IpAddr> for Ipv6Addr

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impl PartialEq<Ipv6MulticastScope> for Ipv6MulticastScope

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impl PartialEq<Shutdown> for Shutdown

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impl PartialEq<SocketAddr> for SocketAddr

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impl PartialEq<FpCategory> for FpCategory

1.55.0 · source§

impl PartialEq<IntErrorKind> for IntErrorKind

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impl PartialEq<BacktraceStyle> for BacktraceStyle

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impl PartialEq<State> for std::path::State

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impl PartialEq<Which> for Which

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impl PartialEq<SearchStep> for SearchStep

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impl PartialEq<Ordering> for std::sync::atomic::Ordering

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impl PartialEq<Selected> for Selected

1.12.0 · source§

impl PartialEq<RecvTimeoutError> for RecvTimeoutError

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impl PartialEq<TryRecvError> for TryRecvError

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impl PartialEq<ReparsePoint> for ReparsePoint

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impl PartialEq<State> for std::sys::windows::pipe::State

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impl PartialEq<Ordering> for std::cmp::Ordering

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impl PartialEq<bool> for bool

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impl PartialEq<char> for char

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impl PartialEq<f32> for f32

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impl PartialEq<f64> for f64

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impl PartialEq<i8> for i8

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impl PartialEq<i16> for i16

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impl PartialEq<i32> for i32

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impl PartialEq<i64> for i64

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impl PartialEq<i128> for i128

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impl PartialEq<isize> for isize

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impl PartialEq<!> for !

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impl PartialEq<str> for str

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impl PartialEq<str> for OsStr

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impl PartialEq<str> for OsString

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impl PartialEq<u8> for u8

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impl PartialEq<u16> for u16

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impl PartialEq<u32> for u32

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impl PartialEq<u64> for u64

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impl PartialEq<u128> for u128

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impl PartialEq<()> for ()

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impl PartialEq<usize> for usize

1.27.0 · source§

impl PartialEq<CpuidResult> for CpuidResult

1.69.0 · source§

impl PartialEq<FromBytesUntilNulError> for FromBytesUntilNulError

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impl PartialEq<AllocError> for AllocError

1.28.0 · source§

impl PartialEq<Layout> for Layout

1.50.0 · source§

impl PartialEq<LayoutError> for LayoutError

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impl PartialEq<TypeId> for TypeId

1.34.0 · source§

impl PartialEq<CharTryFromError> for CharTryFromError

1.9.0 · source§

impl PartialEq<DecodeUtf16Error> for DecodeUtf16Error

1.20.0 · source§

impl PartialEq<ParseCharError> for ParseCharError

1.59.0 · source§

impl PartialEq<TryFromCharError> for TryFromCharError

1.57.0 · source§

impl PartialEq<TryReserveError> for std::collections::TryReserveError

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impl PartialEq<OsStr> for str

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impl PartialEq<OsStr> for OsStr

1.8.0 · source§

impl PartialEq<OsStr> for Path

1.8.0 · source§

impl PartialEq<OsStr> for PathBuf

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impl PartialEq<OsString> for str

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impl PartialEq<OsString> for OsString

1.8.0 · source§

impl PartialEq<OsString> for Path

1.8.0 · source§

impl PartialEq<OsString> for PathBuf

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impl PartialEq<CStr> for CStr

1.64.0 · source§

impl PartialEq<CString> for CString

1.64.0 · source§

impl PartialEq<FromBytesWithNulError> for FromBytesWithNulError

1.64.0 · source§

impl PartialEq<FromVecWithNulError> for FromVecWithNulError

1.64.0 · source§

impl PartialEq<IntoStringError> for IntoStringError

1.64.0 · source§

impl PartialEq<NulError> for NulError

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impl PartialEq<Error> for Error

1.1.0 · source§

impl PartialEq<FileType> for std::fs::FileType

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impl PartialEq<Permissions> for Permissions

1.33.0 · source§

impl PartialEq<PhantomPinned> for PhantomPinned

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impl PartialEq<Assume> for Assume

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impl PartialEq<AddrParseError> for AddrParseError

1.16.0 · source§

impl PartialEq<Ipv4Addr> for IpAddr

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impl PartialEq<Ipv4Addr> for Ipv4Addr

1.16.0 · source§

impl PartialEq<Ipv6Addr> for IpAddr

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impl PartialEq<Ipv6Addr> for Ipv6Addr

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impl PartialEq<SocketAddrV4> for SocketAddrV4

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impl PartialEq<SocketAddrV6> for SocketAddrV6

1.34.0 · source§

impl PartialEq<NonZeroI8> for NonZeroI8

1.34.0 · source§

impl PartialEq<NonZeroI16> for NonZeroI16

1.34.0 · source§

impl PartialEq<NonZeroI32> for NonZeroI32

1.34.0 · source§

impl PartialEq<NonZeroI64> for NonZeroI64

1.34.0 · source§

impl PartialEq<NonZeroI128> for NonZeroI128

1.34.0 · source§

impl PartialEq<NonZeroIsize> for NonZeroIsize

1.28.0 · source§

impl PartialEq<NonZeroU8> for NonZeroU8

1.28.0 · source§

impl PartialEq<NonZeroU16> for NonZeroU16

1.28.0 · source§

impl PartialEq<NonZeroU32> for NonZeroU32

1.28.0 · source§

impl PartialEq<NonZeroU64> for NonZeroU64

1.28.0 · source§

impl PartialEq<NonZeroU128> for NonZeroU128

1.28.0 · source§

impl PartialEq<NonZeroUsize> for NonZeroUsize

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impl PartialEq<ParseFloatError> for ParseFloatError

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impl PartialEq<ParseIntError> for ParseIntError

1.34.0 · source§

impl PartialEq<TryFromIntError> for TryFromIntError

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impl PartialEq<RangeFull> for RangeFull

1.63.0 · source§

impl PartialEq<InvalidHandleError> for InvalidHandleError

Available on Windows only.
1.63.0 · source§

impl PartialEq<NullHandleError> for NullHandleError

Available on Windows only.
1.8.0 · source§

impl PartialEq<Path> for OsStr

1.8.0 · source§

impl PartialEq<Path> for OsString

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impl PartialEq<Path> for Path

1.6.0 · source§

impl PartialEq<Path> for PathBuf

1.8.0 · source§

impl PartialEq<PathBuf> for OsStr

1.8.0 · source§

impl PartialEq<PathBuf> for OsString

1.6.0 · source§

impl PartialEq<PathBuf> for Path

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impl PartialEq<PathBuf> for PathBuf

1.7.0 · source§

impl PartialEq<StripPrefixError> for StripPrefixError

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impl PartialEq<ExitStatus> for std::process::ExitStatus

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impl PartialEq<ExitStatusError> for std::process::ExitStatusError

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impl PartialEq<Output> for Output

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impl PartialEq<Alignment> for std::ptr::Alignment

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impl PartialEq<ParseBoolError> for ParseBoolError

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impl PartialEq<Utf8Error> for Utf8Error

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impl PartialEq<FromUtf8Error> for FromUtf8Error

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impl PartialEq<String> for String

1.5.0 · source§

impl PartialEq<WaitTimeoutResult> for WaitTimeoutResult

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impl PartialEq<Operation> for Operation

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impl PartialEq<RecvError> for RecvError

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impl PartialEq<FilePermissions> for FilePermissions

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impl PartialEq<FileType> for std::sys::windows::fs::FileType

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impl PartialEq<ExitCode> for ExitCode

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impl PartialEq<ExitStatus> for std::sys::windows::process::ExitStatus

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impl PartialEq<ExitStatusError> for std::sys::windows::process::ExitStatusError

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impl PartialEq<Instant> for std::sys::windows::time::Instant

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impl PartialEq<SystemTime> for std::sys::windows::time::SystemTime

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impl PartialEq<CodePoint> for CodePoint

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impl PartialEq<Wtf8> for Wtf8

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impl PartialEq<Wtf8Buf> for Wtf8Buf

1.36.0 · source§

impl PartialEq<RawWaker> for RawWaker

1.36.0 · source§

impl PartialEq<RawWakerVTable> for RawWakerVTable

1.26.0 · source§

impl PartialEq<AccessError> for AccessError

1.19.0 · source§

impl PartialEq<ThreadId> for ThreadId

1.3.0 · source§

impl PartialEq<Duration> for Duration

1.8.0 · source§

impl PartialEq<Instant> for std::time::Instant

1.8.0 · source§

impl PartialEq<SystemTime> for std::time::SystemTime

1.66.0 · source§

impl PartialEq<TryFromFloatSecsError> for TryFromFloatSecsError

1.8.0 · source§

impl<'a> PartialEq<&'a OsStr> for Path

1.8.0 · source§

impl<'a> PartialEq<&'a OsStr> for PathBuf

1.8.0 · source§

impl<'a> PartialEq<&'a Path> for OsStr

1.8.0 · source§

impl<'a> PartialEq<&'a Path> for OsString

1.6.0 · source§

impl<'a> PartialEq<&'a Path> for PathBuf

1.8.0 · source§

impl<'a> PartialEq<Cow<'a, OsStr>> for Path

1.8.0 · source§

impl<'a> PartialEq<Cow<'a, OsStr>> for PathBuf

1.8.0 · source§

impl<'a> PartialEq<Cow<'a, Path>> for OsStr

1.8.0 · source§

impl<'a> PartialEq<Cow<'a, Path>> for OsString

1.6.0 · source§

impl<'a> PartialEq<Cow<'a, Path>> for Path

1.6.0 · source§

impl<'a> PartialEq<Cow<'a, Path>> for PathBuf

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impl<'a> PartialEq<Component<'a>> for Component<'a>

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impl<'a> PartialEq<Prefix<'a>> for Prefix<'a>

1.8.0 · source§

impl<'a> PartialEq<OsStr> for &'a Path

1.8.0 · source§

impl<'a> PartialEq<OsStr> for Cow<'a, Path>

1.29.0 · source§

impl<'a> PartialEq<OsString> for &'a str

1.8.0 · source§

impl<'a> PartialEq<OsString> for &'a Path

1.8.0 · source§

impl<'a> PartialEq<OsString> for Cow<'a, Path>

1.10.0 · source§

impl<'a> PartialEq<Location<'a>> for Location<'a>

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impl<'a> PartialEq<Components<'a>> for Components<'a>

1.8.0 · source§

impl<'a> PartialEq<Path> for &'a OsStr

1.8.0 · source§

impl<'a> PartialEq<Path> for Cow<'a, OsStr>

1.6.0 · source§

impl<'a> PartialEq<Path> for Cow<'a, Path>

1.8.0 · source§

impl<'a> PartialEq<PathBuf> for &'a OsStr

1.6.0 · source§

impl<'a> PartialEq<PathBuf> for &'a Path

1.8.0 · source§

impl<'a> PartialEq<PathBuf> for Cow<'a, OsStr>

1.6.0 · source§

impl<'a> PartialEq<PathBuf> for Cow<'a, Path>

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impl<'a> PartialEq<PrefixComponent<'a>> for PrefixComponent<'a>

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impl<'a> PartialEq<Utf8Chunk<'a>> for Utf8Chunk<'a>

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impl<'a, 'b> PartialEq<&'a str> for String

1.8.0 · source§

impl<'a, 'b> PartialEq<&'a OsStr> for OsString

1.8.0 · source§

impl<'a, 'b> PartialEq<&'a Path> for Cow<'b, OsStr>

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impl<'a, 'b> PartialEq<&'b str> for Cow<'a, str>

1.8.0 · source§

impl<'a, 'b> PartialEq<&'b OsStr> for Cow<'a, OsStr>

1.8.0 · source§

impl<'a, 'b> PartialEq<&'b OsStr> for Cow<'a, Path>

1.6.0 · source§

impl<'a, 'b> PartialEq<&'b Path> for Cow<'a, Path>

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impl<'a, 'b> PartialEq<Cow<'a, str>> for &'b str

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impl<'a, 'b> PartialEq<Cow<'a, str>> for str

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impl<'a, 'b> PartialEq<Cow<'a, str>> for String

1.8.0 · source§

impl<'a, 'b> PartialEq<Cow<'a, OsStr>> for &'b OsStr

1.8.0 · source§

impl<'a, 'b> PartialEq<Cow<'a, OsStr>> for OsStr

1.8.0 · source§

impl<'a, 'b> PartialEq<Cow<'a, OsStr>> for OsString

1.8.0 · source§

impl<'a, 'b> PartialEq<Cow<'a, Path>> for &'b OsStr

1.6.0 · source§

impl<'a, 'b> PartialEq<Cow<'a, Path>> for &'b Path

1.8.0 · source§

impl<'a, 'b> PartialEq<Cow<'b, OsStr>> for &'a Path

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impl<'a, 'b> PartialEq<str> for Cow<'a, str>

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impl<'a, 'b> PartialEq<str> for String

1.8.0 · source§

impl<'a, 'b> PartialEq<OsStr> for Cow<'a, OsStr>

1.8.0 · source§

impl<'a, 'b> PartialEq<OsStr> for OsString

1.8.0 · source§

impl<'a, 'b> PartialEq<OsString> for &'a OsStr

1.8.0 · source§

impl<'a, 'b> PartialEq<OsString> for Cow<'a, OsStr>

1.8.0 · source§

impl<'a, 'b> PartialEq<OsString> for OsStr

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impl<'a, 'b> PartialEq<String> for &'a str

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impl<'a, 'b> PartialEq<String> for Cow<'a, str>

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impl<'a, 'b> PartialEq<String> for str

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impl<'a, 'b, B, C> PartialEq<Cow<'b, C>> for Cow<'a, B>where B: PartialEq<C> + ToOwned + ?Sized, C: ToOwned + ?Sized,

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impl<A, B> PartialEq<&B> for &Awhere A: PartialEq<B> + ?Sized, B: ?Sized,

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impl<A, B> PartialEq<&B> for &mut Awhere A: PartialEq<B> + ?Sized, B: ?Sized,

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impl<A, B> PartialEq<&mut B> for &Awhere A: PartialEq<B> + ?Sized, B: ?Sized,

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impl<A, B> PartialEq<&mut B> for &mut Awhere A: PartialEq<B> + ?Sized, B: ?Sized,

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impl<A, B> PartialEq<[B]> for [A]where A: PartialEq<B>,

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impl<A, B, const N: usize> PartialEq<&[B]> for [A; N]where A: PartialEq<B>,

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impl<A, B, const N: usize> PartialEq<&mut [B]> for [A; N]where A: PartialEq<B>,

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impl<A, B, const N: usize> PartialEq<[A; N]> for &[B]where B: PartialEq<A>,

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impl<A, B, const N: usize> PartialEq<[A; N]> for &mut [B]where B: PartialEq<A>,

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impl<A, B, const N: usize> PartialEq<[A; N]> for [B]where B: PartialEq<A>,

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impl<A, B, const N: usize> PartialEq<[B; N]> for [A; N]where A: PartialEq<B>,

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impl<A, B, const N: usize> PartialEq<[B]> for [A; N]where A: PartialEq<B>,

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impl<A, Z, Y, X, W, V, U, T> PartialEq<(A, Z, Y, X, W, V, U, T)> for (A, Z, Y, X, W, V, U, T)where A: PartialEq<A>, Z: PartialEq<Z>, Y: PartialEq<Y>, X: PartialEq<X>, W: PartialEq<W>, V: PartialEq<V>, U: PartialEq<U>, T: PartialEq<T> + ?Sized,

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impl<B, A, Z, Y, X, W, V, U, T> PartialEq<(B, A, Z, Y, X, W, V, U, T)> for (B, A, Z, Y, X, W, V, U, T)where B: PartialEq<B>, A: PartialEq<A>, Z: PartialEq<Z>, Y: PartialEq<Y>, X: PartialEq<X>, W: PartialEq<W>, V: PartialEq<V>, U: PartialEq<U>, T: PartialEq<T> + ?Sized,

1.55.0 · source§

impl<B, C> PartialEq<ControlFlow<B, C>> for ControlFlow<B, C>where B: PartialEq<B>, C: PartialEq<C>,

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impl<C> PartialEq<Receiver<C>> for Receiver<C>

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impl<C> PartialEq<Sender<C>> for Sender<C>

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impl<C, B, A, Z, Y, X, W, V, U, T> PartialEq<(C, B, A, Z, Y, X, W, V, U, T)> for (C, B, A, Z, Y, X, W, V, U, T)where C: PartialEq<C>, B: PartialEq<B>, A: PartialEq<A>, Z: PartialEq<Z>, Y: PartialEq<Y>, X: PartialEq<X>, W: PartialEq<W>, V: PartialEq<V>, U: PartialEq<U>, T: PartialEq<T> + ?Sized,

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impl<D, C, B, A, Z, Y, X, W, V, U, T> PartialEq<(D, C, B, A, Z, Y, X, W, V, U, T)> for (D, C, B, A, Z, Y, X, W, V, U, T)where D: PartialEq<D>, C: PartialEq<C>, B: PartialEq<B>, A: PartialEq<A>, Z: PartialEq<Z>, Y: PartialEq<Y>, X: PartialEq<X>, W: PartialEq<W>, V: PartialEq<V>, U: PartialEq<U>, T: PartialEq<T> + ?Sized,

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impl<Dyn> PartialEq<DynMetadata<Dyn>> for DynMetadata<Dyn>where Dyn: ?Sized,

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impl<E, D, C, B, A, Z, Y, X, W, V, U, T> PartialEq<(E, D, C, B, A, Z, Y, X, W, V, U, T)> for (E, D, C, B, A, Z, Y, X, W, V, U, T)where E: PartialEq<E>, D: PartialEq<D>, C: PartialEq<C>, B: PartialEq<B>, A: PartialEq<A>, Z: PartialEq<Z>, Y: PartialEq<Y>, X: PartialEq<X>, W: PartialEq<W>, V: PartialEq<V>, U: PartialEq<U>, T: PartialEq<T> + ?Sized,

1.4.0 · source§

impl<F> PartialEq<F> for Fwhere F: FnPtr,

1.29.0 · source§

impl<H> PartialEq<BuildHasherDefault<H>> for BuildHasherDefault<H>

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impl<Idx> PartialEq<Range<Idx>> for Range<Idx>where Idx: PartialEq<Idx>,

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impl<Idx> PartialEq<RangeFrom<Idx>> for RangeFrom<Idx>where Idx: PartialEq<Idx>,

1.26.0 · source§

impl<Idx> PartialEq<RangeInclusive<Idx>> for RangeInclusive<Idx>where Idx: PartialEq<Idx>,

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impl<Idx> PartialEq<RangeTo<Idx>> for RangeTo<Idx>where Idx: PartialEq<Idx>,

1.26.0 · source§

impl<Idx> PartialEq<RangeToInclusive<Idx>> for RangeToInclusive<Idx>where Idx: PartialEq<Idx>,

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impl<K, V, A> PartialEq<BTreeMap<K, V, A>> for BTreeMap<K, V, A>where K: PartialEq<K>, V: PartialEq<V>, A: Allocator + Clone,

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impl<K, V, S> PartialEq<HashMap<K, V, S>> for std::collections::hash::map::HashMap<K, V, S>where K: Eq + Hash, V: PartialEq, S: BuildHasher,

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impl<K, V, S, A> PartialEq<HashMap<K, V, S, A>> for hashbrown::map::HashMap<K, V, S, A>where K: Eq + Hash, V: PartialEq<V>, S: BuildHasher, A: Allocator + Clone,

1.41.0 · source§

impl<P, Q> PartialEq<Pin<Q>> for Pin<P>where P: Deref, Q: Deref, <P as Deref>::Target: PartialEq<<Q as Deref>::Target>,

1.17.0 · source§

impl<T> PartialEq<Bound<T>> for Bound<T>where T: PartialEq<T>,

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impl<T> PartialEq<Option<T>> for Option<T>where T: PartialEq<T>,

1.36.0 · source§

impl<T> PartialEq<Poll<T>> for Poll<T>where T: PartialEq<T>,

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impl<T> PartialEq<*const T> for *const Twhere T: ?Sized,

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impl<T> PartialEq<*mut T> for *mut Twhere T: ?Sized,

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impl<T> PartialEq<(T,)> for (T₁, T₂, …, Tₙ)where T: PartialEq<T> + ?Sized,

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

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impl<T> PartialEq<Cell<T>> for Cell<T>where T: PartialEq<T> + Copy,

1.70.0 · source§

impl<T> PartialEq<OnceCell<T>> for OnceCell<T>where T: PartialEq<T>,

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impl<T> PartialEq<RefCell<T>> for RefCell<T>where T: PartialEq<T> + ?Sized,

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

1.21.0 · source§

impl<T> PartialEq<Discriminant<T>> for Discriminant<T>

1.20.0 · source§

impl<T> PartialEq<ManuallyDrop<T>> for ManuallyDrop<T>where T: PartialEq<T> + ?Sized,

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impl<T> PartialEq<Saturating<T>> for Saturating<T>where T: PartialEq<T>,

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impl<T> PartialEq<Wrapping<T>> for Wrapping<T>where T: PartialEq<T>,

1.25.0 · source§

impl<T> PartialEq<NonNull<T>> for NonNull<T>where T: ?Sized,

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impl<T> PartialEq<Rc<T>> for Rc<T>where T: PartialEq<T> + ?Sized,

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impl<T> PartialEq<Arc<T>> for Arc<T>where T: PartialEq<T> + ?Sized,

1.19.0 · source§

impl<T> PartialEq<Reverse<T>> for Reverse<T>where T: PartialEq<T>,

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impl<T, A> PartialEq<Box<T, A>> for Box<T, A>where T: PartialEq<T> + ?Sized, A: Allocator,

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impl<T, A> PartialEq<BTreeSet<T, A>> for BTreeSet<T, A>where T: PartialEq<T>, A: Allocator + Clone,

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impl<T, A> PartialEq<LinkedList<T, A>> for LinkedList<T, A>where T: PartialEq<T>, A: Allocator,

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impl<T, A> PartialEq<VecDeque<T, A>> for VecDeque<T, A>where T: PartialEq<T>, A: Allocator,

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impl<T, E> PartialEq<Result<T, E>> for Result<T, E>where T: PartialEq<T>, E: PartialEq<E>,

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impl<T, S> PartialEq<HashSet<T, S>> for std::collections::hash::set::HashSet<T, S>where T: Eq + Hash, S: BuildHasher,

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impl<T, S, A> PartialEq<HashSet<T, S, A>> for hashbrown::set::HashSet<T, S, A>where T: Eq + Hash, S: BuildHasher, A: Allocator + Clone,

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impl<T, U> PartialEq<&[U]> for Cow<'_, [T]>where T: PartialEq<U> + Clone,

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impl<T, U> PartialEq<&mut [U]> for Cow<'_, [T]>where T: PartialEq<U> + Clone,

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impl<T, U, A1, A2> PartialEq<Vec<U, A2>> for Vec<T, A1>where A1: Allocator, A2: Allocator, T: PartialEq<U>,

1.17.0 · source§

impl<T, U, A> PartialEq<&[U]> for VecDeque<T, A>where A: Allocator, T: PartialEq<U>,

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impl<T, U, A> PartialEq<&[U]> for Vec<T, A>where A: Allocator, T: PartialEq<U>,

1.17.0 · source§

impl<T, U, A> PartialEq<&mut [U]> for VecDeque<T, A>where A: Allocator, T: PartialEq<U>,

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impl<T, U, A> PartialEq<&mut [U]> for Vec<T, A>where A: Allocator, T: PartialEq<U>,

1.48.0 · source§

impl<T, U, A> PartialEq<[U]> for Vec<T, A>where A: Allocator, T: PartialEq<U>,

1.46.0 · source§

impl<T, U, A> PartialEq<Vec<U, A>> for &[T]where A: Allocator, T: PartialEq<U>,

1.46.0 · source§

impl<T, U, A> PartialEq<Vec<U, A>> for &mut [T]where A: Allocator, T: PartialEq<U>,

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impl<T, U, A> PartialEq<Vec<U, A>> for Cow<'_, [T]>where A: Allocator, T: PartialEq<U> + Clone,

1.48.0 · source§

impl<T, U, A> PartialEq<Vec<U, A>> for [T]where A: Allocator, T: PartialEq<U>,

1.17.0 · source§

impl<T, U, A> PartialEq<Vec<U, A>> for VecDeque<T, A>where A: Allocator, T: PartialEq<U>,

1.17.0 · source§

impl<T, U, A, const N: usize> PartialEq<&[U; N]> for VecDeque<T, A>where A: Allocator, T: PartialEq<U>,

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impl<T, U, A, const N: usize> PartialEq<&[U; N]> for Vec<T, A>where A: Allocator, T: PartialEq<U>,

1.17.0 · source§

impl<T, U, A, const N: usize> PartialEq<&mut [U; N]> for VecDeque<T, A>where A: Allocator, T: PartialEq<U>,

1.17.0 · source§

impl<T, U, A, const N: usize> PartialEq<[U; N]> for VecDeque<T, A>where A: Allocator, T: PartialEq<U>,

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impl<T, U, A, const N: usize> PartialEq<[U; N]> for Vec<T, A>where A: Allocator, T: PartialEq<U>,

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impl<T, const LANES: usize> PartialEq<Mask<T, LANES>> for Mask<T, LANES>where T: MaskElement + PartialEq<T>, LaneCount<LANES>: SupportedLaneCount,

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impl<T, const N: usize> PartialEq<Simd<T, N>> for Simd<T, N>where LaneCount<N>: SupportedLaneCount, T: SimdElement + PartialEq<T>,

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impl<T: PartialEq> PartialEq<SendTimeoutError<T>> for SendTimeoutError<T>

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impl<T: PartialEq> PartialEq<TrySendError<T>> for TrySendError<T>

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impl<T: PartialEq> PartialEq<Cursor<T>> for Cursor<T>

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impl<T: PartialEq> PartialEq<CachePadded<T>> for CachePadded<T>

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impl<T: PartialEq> PartialEq<SendError<T>> for SendError<T>

1.70.0 · source§

impl<T: PartialEq> PartialEq<OnceLock<T>> for OnceLock<T>

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impl<U, T> PartialEq<(U, T)> for (U, T)where U: PartialEq<U>, T: PartialEq<T> + ?Sized,

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impl<V, U, T> PartialEq<(V, U, T)> for (V, U, T)where V: PartialEq<V>, U: PartialEq<U>, T: PartialEq<T> + ?Sized,

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impl<W, V, U, T> PartialEq<(W, V, U, T)> for (W, V, U, T)where W: PartialEq<W>, V: PartialEq<V>, U: PartialEq<U>, T: PartialEq<T> + ?Sized,

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impl<X, W, V, U, T> PartialEq<(X, W, V, U, T)> for (X, W, V, U, T)where X: PartialEq<X>, W: PartialEq<W>, V: PartialEq<V>, U: PartialEq<U>, T: PartialEq<T> + ?Sized,

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impl<Y, R> PartialEq<GeneratorState<Y, R>> for GeneratorState<Y, R>where Y: PartialEq<Y>, R: PartialEq<R>,

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impl<Y, X, W, V, U, T> PartialEq<(Y, X, W, V, U, T)> for (Y, X, W, V, U, T)where Y: PartialEq<Y>, X: PartialEq<X>, W: PartialEq<W>, V: PartialEq<V>, U: PartialEq<U>, T: PartialEq<T> + ?Sized,

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impl<Z, Y, X, W, V, U, T> PartialEq<(Z, Y, X, W, V, U, T)> for (Z, Y, X, W, V, U, T)where Z: PartialEq<Z>, Y: PartialEq<Y>, X: PartialEq<X>, W: PartialEq<W>, V: PartialEq<V>, U: PartialEq<U>, T: PartialEq<T> + ?Sized,