Trait std::cmp::PartialEq1.0.0[][src]

#[lang = "eq"]pub trait PartialEq<Rhs = Self> where
    Rhs: ?Sized
{ #[must_use] pub fn eq(&self, other: &Rhs) -> bool; #[must_use] pub fn ne(&self, other: &Rhs) -> bool { ... } }

Trait for equality comparisons which are partial equivalence relations.

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, the equality must be (for all a, b, c of type A, B, 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, each variant is equal to itself and not equal to the other variants.

How can I implement PartialEq?

PartialEq only requires the eq method to be implemented; ne is defined in terms of it by default. Any manual implementation of ne must respect the rule that eq is a strict inverse of ne; that is, !(a == b) if and only if a != b.

Implementations of PartialEq, PartialOrd, and Ord must agree with each other. It’s easy to accidentally make them disagree by deriving some of the traits and manually implementing others.

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

#[must_use]pub fn eq(&self, other: &Rhs) -> bool[src]

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

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Provided methods

#[must_use]pub fn ne(&self, other: &Rhs) -> bool[src]

This method tests for !=.

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Implementations on Foreign Types

impl PartialEq<CpuidResult> for CpuidResult[src]

impl<'a> PartialEq<Utf8LossyChunk<'a>> for Utf8LossyChunk<'a>[src]

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Implementors

impl PartialEq<&'_ str> for OsString1.29.0[src]

impl PartialEq<BacktraceStatus> for BacktraceStatus[src]

impl PartialEq<Ordering> for std::cmp::Ordering[src]

impl PartialEq<TryReserveError> for TryReserveError[src]

impl PartialEq<Infallible> for Infallible1.34.0[src]

impl PartialEq<VarError> for VarError[src]

impl PartialEq<ErrorKind> for ErrorKind[src]

impl PartialEq<SeekFrom> for SeekFrom[src]

impl PartialEq<IpAddr> for IpAddr1.7.0[src]

impl PartialEq<IpAddr> for Ipv4Addr1.16.0[src]

impl PartialEq<IpAddr> for Ipv6Addr1.16.0[src]

impl PartialEq<Ipv6MulticastScope> for Ipv6MulticastScope[src]

impl PartialEq<Shutdown> for Shutdown[src]

impl PartialEq<SocketAddr> for SocketAddr[src]

impl PartialEq<FpCategory> for FpCategory[src]

impl PartialEq<IntErrorKind> for IntErrorKind[src]

impl PartialEq<SearchStep> for SearchStep[src]

impl PartialEq<Ordering> for std::sync::atomic::Ordering[src]

impl PartialEq<RecvTimeoutError> for RecvTimeoutError1.12.0[src]

impl PartialEq<TryRecvError> for TryRecvError[src]

impl PartialEq<bool> for bool[src]

impl PartialEq<char> for char[src]

impl PartialEq<f32> for f32[src]

impl PartialEq<f64> for f64[src]

impl PartialEq<i8> for i8[src]

impl PartialEq<i16> for i16[src]

impl PartialEq<i32> for i32[src]

impl PartialEq<i64> for i64[src]

impl PartialEq<i128> for i128[src]

impl PartialEq<isize> for isize[src]

impl PartialEq<!> for ![src]

impl PartialEq<str> for str[src]

impl PartialEq<str> for OsStr[src]

impl PartialEq<str> for OsString[src]

impl PartialEq<u8> for u8[src]

impl PartialEq<u16> for u16[src]

impl PartialEq<u32> for u32[src]

impl PartialEq<u64> for u64[src]

impl PartialEq<u128> for u128[src]

impl PartialEq<()> for ()[src]

impl PartialEq<usize> for usize[src]

impl PartialEq<AllocError> for AllocError[src]

impl PartialEq<Layout> for Layout1.28.0[src]

impl PartialEq<LayoutError> for LayoutError1.50.0[src]

impl PartialEq<TypeId> for TypeId[src]

impl PartialEq<CharTryFromError> for CharTryFromError1.34.0[src]

impl PartialEq<DecodeUtf16Error> for DecodeUtf16Error1.9.0[src]

impl PartialEq<ParseCharError> for ParseCharError1.20.0[src]

impl PartialEq<CStr> for CStr[src]

impl PartialEq<CString> for CString[src]

impl PartialEq<FromBytesWithNulError> for FromBytesWithNulError1.10.0[src]

impl PartialEq<FromVecWithNulError> for FromVecWithNulError[src]

impl PartialEq<IntoStringError> for IntoStringError1.7.0[src]

impl PartialEq<NulError> for NulError[src]

impl PartialEq<OsStr> for str[src]

impl PartialEq<OsStr> for OsStr[src]

impl PartialEq<OsString> for str[src]

impl PartialEq<OsString> for OsString[src]

impl PartialEq<Error> for Error[src]

impl PartialEq<FileType> for FileType1.1.0[src]

impl PartialEq<Permissions> for Permissions[src]

impl PartialEq<PhantomPinned> for PhantomPinned1.33.0[src]

impl PartialEq<AddrParseError> for AddrParseError[src]

impl PartialEq<Ipv4Addr> for IpAddr1.16.0[src]

impl PartialEq<Ipv4Addr> for Ipv4Addr[src]

impl PartialEq<Ipv6Addr> for IpAddr1.16.0[src]

impl PartialEq<Ipv6Addr> for Ipv6Addr[src]

impl PartialEq<SocketAddrV4> for SocketAddrV4[src]

impl PartialEq<SocketAddrV6> for SocketAddrV6[src]

impl PartialEq<NonZeroI8> for NonZeroI81.34.0[src]

impl PartialEq<NonZeroI16> for NonZeroI161.34.0[src]

impl PartialEq<NonZeroI32> for NonZeroI321.34.0[src]

impl PartialEq<NonZeroI64> for NonZeroI641.34.0[src]

impl PartialEq<NonZeroI128> for NonZeroI1281.34.0[src]

impl PartialEq<NonZeroIsize> for NonZeroIsize1.34.0[src]

impl PartialEq<NonZeroU8> for NonZeroU81.28.0[src]

impl PartialEq<NonZeroU16> for NonZeroU161.28.0[src]

impl PartialEq<NonZeroU32> for NonZeroU321.28.0[src]

impl PartialEq<NonZeroU64> for NonZeroU641.28.0[src]

impl PartialEq<NonZeroU128> for NonZeroU1281.28.0[src]

impl PartialEq<NonZeroUsize> for NonZeroUsize1.28.0[src]

impl PartialEq<ParseFloatError> for ParseFloatError[src]

impl PartialEq<ParseIntError> for ParseIntError[src]

impl PartialEq<TryFromIntError> for TryFromIntError1.34.0[src]

impl PartialEq<RangeFull> for RangeFull[src]

impl PartialEq<NoneError> for NoneError[src]

impl PartialEq<UCred> for UCred[src]

This is supported on Unix only.

impl PartialEq<Path> for Path[src]

impl PartialEq<PathBuf> for PathBuf[src]

impl PartialEq<StripPrefixError> for StripPrefixError1.7.0[src]

impl PartialEq<ExitStatus> for ExitStatus[src]

impl PartialEq<Output> for Output[src]

impl PartialEq<ParseBoolError> for ParseBoolError[src]

impl PartialEq<Utf8Error> for Utf8Error[src]

impl PartialEq<FromUtf8Error> for FromUtf8Error[src]

impl PartialEq<String> for String[src]

impl PartialEq<RecvError> for RecvError[src]

impl PartialEq<WaitTimeoutResult> for WaitTimeoutResult1.5.0[src]

impl PartialEq<RawWaker> for RawWaker1.36.0[src]

impl PartialEq<RawWakerVTable> for RawWakerVTable1.36.0[src]

impl PartialEq<AccessError> for AccessError1.26.0[src]

impl PartialEq<ThreadId> for ThreadId1.19.0[src]

impl PartialEq<Duration> for Duration1.3.0[src]

impl PartialEq<Instant> for Instant1.8.0[src]

impl PartialEq<SystemTime> for SystemTime1.8.0[src]

impl<'_, '_, A, B> PartialEq<&'_ B> for &'_ A where
    B: ?Sized,
    A: PartialEq<B> + ?Sized
[src]

impl<'_, '_, A, B> PartialEq<&'_ B> for &'_ mut A where
    B: ?Sized,
    A: PartialEq<B> + ?Sized
[src]

impl<'_, '_, A, B> PartialEq<&'_ mut B> for &'_ A where
    B: ?Sized,
    A: PartialEq<B> + ?Sized
[src]

impl<'_, '_, A, B> PartialEq<&'_ mut B> for &'_ mut A where
    B: ?Sized,
    A: PartialEq<B> + ?Sized
[src]

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

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

impl<'_, A, B> PartialEq<&'_ [B]> for VecDeque<A> where
    A: PartialEq<B>, 
1.17.0[src]

impl<'_, A, B> PartialEq<&'_ mut [B]> for VecDeque<A> where
    A: PartialEq<B>, 
1.17.0[src]

impl<'_, A, B, const N: usize> PartialEq<&'_ [B; N]> for VecDeque<A> where
    A: PartialEq<B>, 
1.17.0[src]

impl<'_, A, B, const N: usize> PartialEq<&'_ mut [B; N]> for VecDeque<A> where
    A: PartialEq<B>, 
1.17.0[src]

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

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

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

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

impl<'_, T, U, A> PartialEq<&'_ [U]> for Vec<T, A> where
    T: PartialEq<U>,
    A: Allocator
[src]

impl<'_, T, U, A> PartialEq<&'_ mut [U]> for Vec<T, A> where
    T: PartialEq<U>,
    A: Allocator
[src]

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

impl<'_, T, U, A> PartialEq<Vec<U, A>> for &'_ [T] where
    T: PartialEq<U>,
    A: Allocator
1.46.0[src]

impl<'_, T, U, A> PartialEq<Vec<U, A>> for &'_ mut [T] where
    T: PartialEq<U>,
    A: Allocator
1.46.0[src]

impl<'_, T, U, A, const N: usize> PartialEq<&'_ [U; N]> for Vec<T, A> where
    T: PartialEq<U>,
    A: Allocator
[src]

impl<'a> PartialEq<Component<'a>> for Component<'a>[src]

impl<'a> PartialEq<Prefix<'a>> for Prefix<'a>[src]

impl<'a> PartialEq<OsString> for &'a str1.29.0[src]

impl<'a> PartialEq<Location<'a>> for Location<'a>1.10.0[src]

impl<'a> PartialEq<Components<'a>> for Components<'a>[src]

impl<'a> PartialEq<PrefixComponent<'a>> for PrefixComponent<'a>[src]

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

impl<'a, 'b> PartialEq<&'a OsStr> for OsString1.8.0[src]

impl<'a, 'b> PartialEq<&'a OsStr> for Path1.8.0[src]

impl<'a, 'b> PartialEq<&'a OsStr> for PathBuf1.8.0[src]

impl<'a, 'b> PartialEq<&'a Path> for Cow<'b, OsStr>1.8.0[src]

impl<'a, 'b> PartialEq<&'a Path> for OsStr1.8.0[src]

impl<'a, 'b> PartialEq<&'a Path> for OsString1.8.0[src]

impl<'a, 'b> PartialEq<&'a Path> for PathBuf1.6.0[src]

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

impl<'a, 'b> PartialEq<&'b OsStr> for Cow<'a, OsStr>1.8.0[src]

impl<'a, 'b> PartialEq<&'b OsStr> for Cow<'a, Path>1.8.0[src]

impl<'a, 'b> PartialEq<&'b Path> for Cow<'a, Path>1.6.0[src]

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

impl<'a, 'b> PartialEq<Cow<'a, str>> for str[src]

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

impl<'a, 'b> PartialEq<Cow<'a, OsStr>> for &'b OsStr1.8.0[src]

impl<'a, 'b> PartialEq<Cow<'a, OsStr>> for OsStr1.8.0[src]

impl<'a, 'b> PartialEq<Cow<'a, OsStr>> for OsString1.8.0[src]

impl<'a, 'b> PartialEq<Cow<'a, OsStr>> for Path1.8.0[src]

impl<'a, 'b> PartialEq<Cow<'a, OsStr>> for PathBuf1.8.0[src]

impl<'a, 'b> PartialEq<Cow<'a, Path>> for &'b OsStr1.8.0[src]

impl<'a, 'b> PartialEq<Cow<'a, Path>> for &'b Path1.6.0[src]

impl<'a, 'b> PartialEq<Cow<'a, Path>> for OsStr1.8.0[src]

impl<'a, 'b> PartialEq<Cow<'a, Path>> for OsString1.8.0[src]

impl<'a, 'b> PartialEq<Cow<'a, Path>> for Path1.6.0[src]

impl<'a, 'b> PartialEq<Cow<'a, Path>> for PathBuf1.6.0[src]

impl<'a, 'b> PartialEq<Cow<'b, OsStr>> for &'a Path1.8.0[src]

impl<'a, 'b> PartialEq<str> for Cow<'a, str>[src]

impl<'a, 'b> PartialEq<str> for String[src]

impl<'a, 'b> PartialEq<OsStr> for &'a Path1.8.0[src]

impl<'a, 'b> PartialEq<OsStr> for Cow<'a, OsStr>1.8.0[src]

impl<'a, 'b> PartialEq<OsStr> for Cow<'a, Path>1.8.0[src]

impl<'a, 'b> PartialEq<OsStr> for OsString1.8.0[src]

impl<'a, 'b> PartialEq<OsStr> for Path1.8.0[src]

impl<'a, 'b> PartialEq<OsStr> for PathBuf1.8.0[src]

impl<'a, 'b> PartialEq<OsString> for &'a OsStr1.8.0[src]

impl<'a, 'b> PartialEq<OsString> for &'a Path1.8.0[src]

impl<'a, 'b> PartialEq<OsString> for Cow<'a, OsStr>1.8.0[src]

impl<'a, 'b> PartialEq<OsString> for Cow<'a, Path>1.8.0[src]

impl<'a, 'b> PartialEq<OsString> for OsStr1.8.0[src]

impl<'a, 'b> PartialEq<OsString> for Path1.8.0[src]

impl<'a, 'b> PartialEq<OsString> for PathBuf1.8.0[src]

impl<'a, 'b> PartialEq<Path> for &'a OsStr1.8.0[src]

impl<'a, 'b> PartialEq<Path> for Cow<'a, OsStr>1.8.0[src]

impl<'a, 'b> PartialEq<Path> for Cow<'a, Path>1.6.0[src]

impl<'a, 'b> PartialEq<Path> for OsStr1.8.0[src]

impl<'a, 'b> PartialEq<Path> for OsString1.8.0[src]

impl<'a, 'b> PartialEq<Path> for PathBuf1.6.0[src]

impl<'a, 'b> PartialEq<PathBuf> for &'a OsStr1.8.0[src]

impl<'a, 'b> PartialEq<PathBuf> for &'a Path1.6.0[src]

impl<'a, 'b> PartialEq<PathBuf> for Cow<'a, OsStr>1.8.0[src]

impl<'a, 'b> PartialEq<PathBuf> for Cow<'a, Path>1.6.0[src]

impl<'a, 'b> PartialEq<PathBuf> for OsStr1.8.0[src]

impl<'a, 'b> PartialEq<PathBuf> for OsString1.8.0[src]

impl<'a, 'b> PartialEq<PathBuf> for Path1.6.0[src]

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

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

impl<'a, 'b> PartialEq<String> for str[src]

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

impl<A> PartialEq<(A,)> for (A,) where
    A: PartialEq<A> + ?Sized
[src]

impl<A> PartialEq<VecDeque<A>> for VecDeque<A> where
    A: PartialEq<A>, 
[src]

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

impl<A, B> PartialEq<(A, B)> for (A, B) where
    B: PartialEq<B> + ?Sized,
    A: PartialEq<A>, 
[src]

impl<A, B> PartialEq<Vec<B, Global>> for VecDeque<A> where
    A: PartialEq<B>, 
1.17.0[src]

impl<A, B, C> PartialEq<(A, B, C)> for (A, B, C) where
    C: PartialEq<C> + ?Sized,
    B: PartialEq<B>,
    A: PartialEq<A>, 
[src]

impl<A, B, C, D> PartialEq<(A, B, C, D)> for (A, B, C, D) where
    C: PartialEq<C>,
    B: PartialEq<B>,
    A: PartialEq<A>,
    D: PartialEq<D> + ?Sized
[src]

impl<A, B, C, D, E> PartialEq<(A, B, C, D, E)> for (A, B, C, D, E) where
    C: PartialEq<C>,
    E: PartialEq<E> + ?Sized,
    B: PartialEq<B>,
    A: PartialEq<A>,
    D: PartialEq<D>, 
[src]

impl<A, B, C, D, E, F> PartialEq<(A, B, C, D, E, F)> for (A, B, C, D, E, F) where
    C: PartialEq<C>,
    F: PartialEq<F> + ?Sized,
    E: PartialEq<E>,
    B: PartialEq<B>,
    A: PartialEq<A>,
    D: PartialEq<D>, 
[src]

impl<A, B, C, D, E, F, G> PartialEq<(A, B, C, D, E, F, G)> for (A, B, C, D, E, F, G) where
    C: PartialEq<C>,
    F: PartialEq<F>,
    E: PartialEq<E>,
    B: PartialEq<B>,
    A: PartialEq<A>,
    G: PartialEq<G> + ?Sized,
    D: PartialEq<D>, 
[src]

impl<A, B, C, D, E, F, G, H> PartialEq<(A, B, C, D, E, F, G, H)> for (A, B, C, D, E, F, G, H) where
    C: PartialEq<C>,
    F: PartialEq<F>,
    E: PartialEq<E>,
    H: PartialEq<H> + ?Sized,
    B: PartialEq<B>,
    A: PartialEq<A>,
    G: PartialEq<G>,
    D: PartialEq<D>, 
[src]

impl<A, B, C, D, E, F, G, H, I> PartialEq<(A, B, C, D, E, F, G, H, I)> for (A, B, C, D, E, F, G, H, I) where
    C: PartialEq<C>,
    F: PartialEq<F>,
    I: PartialEq<I> + ?Sized,
    E: PartialEq<E>,
    H: PartialEq<H>,
    B: PartialEq<B>,
    A: PartialEq<A>,
    G: PartialEq<G>,
    D: PartialEq<D>, 
[src]

impl<A, B, C, D, E, F, G, H, I, J> PartialEq<(A, B, C, D, E, F, G, H, I, J)> for (A, B, C, D, E, F, G, H, I, J) where
    C: PartialEq<C>,
    F: PartialEq<F>,
    I: PartialEq<I>,
    E: PartialEq<E>,
    H: PartialEq<H>,
    B: PartialEq<B>,
    A: PartialEq<A>,
    J: PartialEq<J> + ?Sized,
    G: PartialEq<G>,
    D: PartialEq<D>, 
[src]

impl<A, B, C, D, E, F, G, H, I, J, K> PartialEq<(A, B, C, D, E, F, G, H, I, J, K)> for (A, B, C, D, E, F, G, H, I, J, K) where
    C: PartialEq<C>,
    F: PartialEq<F>,
    K: PartialEq<K> + ?Sized,
    I: PartialEq<I>,
    E: PartialEq<E>,
    H: PartialEq<H>,
    B: PartialEq<B>,
    A: PartialEq<A>,
    J: PartialEq<J>,
    G: PartialEq<G>,
    D: PartialEq<D>, 
[src]

impl<A, B, C, D, E, F, G, H, I, J, K, L> PartialEq<(A, B, C, D, E, F, G, H, I, J, K, L)> for (A, B, C, D, E, F, G, H, I, J, K, L) where
    C: PartialEq<C>,
    F: PartialEq<F>,
    K: PartialEq<K>,
    I: PartialEq<I>,
    E: PartialEq<E>,
    H: PartialEq<H>,
    B: PartialEq<B>,
    A: PartialEq<A>,
    J: PartialEq<J>,
    G: PartialEq<G>,
    D: PartialEq<D>,
    L: PartialEq<L> + ?Sized
[src]

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

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

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

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

impl<B, C> PartialEq<ControlFlow<B, C>> for ControlFlow<B, C> where
    C: PartialEq<C>,
    B: PartialEq<B>, 
[src]

impl<Dyn> PartialEq<DynMetadata<Dyn>> for DynMetadata<Dyn> where
    Dyn: ?Sized
[src]

impl<H> PartialEq<BuildHasherDefault<H>> for BuildHasherDefault<H>1.29.0[src]

impl<Idx> PartialEq<Range<Idx>> for Range<Idx> where
    Idx: PartialEq<Idx>, 
[src]

impl<Idx> PartialEq<RangeFrom<Idx>> for RangeFrom<Idx> where
    Idx: PartialEq<Idx>, 
[src]

impl<Idx> PartialEq<RangeInclusive<Idx>> for RangeInclusive<Idx> where
    Idx: PartialEq<Idx>, 
1.26.0[src]

impl<Idx> PartialEq<RangeTo<Idx>> for RangeTo<Idx> where
    Idx: PartialEq<Idx>, 
[src]

impl<Idx> PartialEq<RangeToInclusive<Idx>> for RangeToInclusive<Idx> where
    Idx: PartialEq<Idx>, 
1.26.0[src]

impl<K, V> PartialEq<BTreeMap<K, V>> for BTreeMap<K, V> where
    K: PartialEq<K>,
    V: PartialEq<V>, 
[src]

impl<K, V, S> PartialEq<HashMap<K, V, S>> for HashMap<K, V, S> where
    K: Eq + Hash,
    V: PartialEq,
    S: BuildHasher
[src]

impl<P, Q> PartialEq<Pin<Q>> for Pin<P> where
    Q: Deref,
    P: Deref,
    <P as Deref>::Target: PartialEq<<Q as Deref>::Target>, 
1.41.0[src]

impl<Ret> PartialEq<fn() -> Ret> for fn() -> Ret1.4.0[src]

impl<Ret> PartialEq<extern "C" fn() -> Ret> for extern "C" fn() -> Ret1.4.0[src]

impl<Ret> PartialEq<unsafe fn() -> Ret> for unsafe fn() -> Ret1.4.0[src]

impl<Ret> PartialEq<unsafe extern "C" fn() -> Ret> for unsafe extern "C" fn() -> Ret1.4.0[src]

impl<Ret, A> PartialEq<fn(A) -> Ret> for fn(A) -> Ret1.4.0[src]

impl<Ret, A> PartialEq<extern "C" fn(A) -> Ret> for extern "C" fn(A) -> Ret1.4.0[src]

impl<Ret, A> PartialEq<extern "C" fn(A, ...) -> Ret> for extern "C" fn(A, ...) -> Ret1.4.0[src]

impl<Ret, A> PartialEq<unsafe fn(A) -> Ret> for unsafe fn(A) -> Ret1.4.0[src]

impl<Ret, A> PartialEq<unsafe extern "C" fn(A) -> Ret> for unsafe extern "C" fn(A) -> Ret1.4.0[src]

impl<Ret, A> PartialEq<unsafe extern "C" fn(A, ...) -> Ret> for unsafe extern "C" fn(A, ...) -> Ret1.4.0[src]

impl<Ret, A, B> PartialEq<fn(A, B) -> Ret> for fn(A, B) -> Ret1.4.0[src]

impl<Ret, A, B> PartialEq<extern "C" fn(A, B) -> Ret> for extern "C" fn(A, B) -> Ret1.4.0[src]

impl<Ret, A, B> PartialEq<extern "C" fn(A, B, ...) -> Ret> for extern "C" fn(A, B, ...) -> Ret1.4.0[src]

impl<Ret, A, B> PartialEq<unsafe fn(A, B) -> Ret> for unsafe fn(A, B) -> Ret1.4.0[src]

impl<Ret, A, B> PartialEq<unsafe extern "C" fn(A, B) -> Ret> for unsafe extern "C" fn(A, B) -> Ret1.4.0[src]

impl<Ret, A, B> PartialEq<unsafe extern "C" fn(A, B, ...) -> Ret> for unsafe extern "C" fn(A, B, ...) -> Ret1.4.0[src]

impl<Ret, A, B, C> PartialEq<fn(A, B, C) -> Ret> for fn(A, B, C) -> Ret1.4.0[src]

impl<Ret, A, B, C> PartialEq<extern "C" fn(A, B, C) -> Ret> for extern "C" fn(A, B, C) -> Ret1.4.0[src]

impl<Ret, A, B, C> PartialEq<extern "C" fn(A, B, C, ...) -> Ret> for extern "C" fn(A, B, C, ...) -> Ret1.4.0[src]

impl<Ret, A, B, C> PartialEq<unsafe fn(A, B, C) -> Ret> for unsafe fn(A, B, C) -> Ret1.4.0[src]

impl<Ret, A, B, C> PartialEq<unsafe extern "C" fn(A, B, C) -> Ret> for unsafe extern "C" fn(A, B, C) -> Ret1.4.0[src]

impl<Ret, A, B, C> PartialEq<unsafe extern "C" fn(A, B, C, ...) -> Ret> for unsafe extern "C" fn(A, B, C, ...) -> Ret1.4.0[src]

impl<Ret, A, B, C, D> PartialEq<fn(A, B, C, D) -> Ret> for fn(A, B, C, D) -> Ret1.4.0[src]

impl<Ret, A, B, C, D> PartialEq<extern "C" fn(A, B, C, D) -> Ret> for extern "C" fn(A, B, C, D) -> Ret1.4.0[src]

impl<Ret, A, B, C, D> PartialEq<extern "C" fn(A, B, C, D, ...) -> Ret> for extern "C" fn(A, B, C, D, ...) -> Ret1.4.0[src]

impl<Ret, A, B, C, D> PartialEq<unsafe fn(A, B, C, D) -> Ret> for unsafe fn(A, B, C, D) -> Ret1.4.0[src]

impl<Ret, A, B, C, D> PartialEq<unsafe extern "C" fn(A, B, C, D) -> Ret> for unsafe extern "C" fn(A, B, C, D) -> Ret1.4.0[src]

impl<Ret, A, B, C, D> PartialEq<unsafe extern "C" fn(A, B, C, D, ...) -> Ret> for unsafe extern "C" fn(A, B, C, D, ...) -> Ret1.4.0[src]

impl<Ret, A, B, C, D, E> PartialEq<fn(A, B, C, D, E) -> Ret> for fn(A, B, C, D, E) -> Ret1.4.0[src]

impl<Ret, A, B, C, D, E> PartialEq<extern "C" fn(A, B, C, D, E) -> Ret> for extern "C" fn(A, B, C, D, E) -> Ret1.4.0[src]

impl<Ret, A, B, C, D, E> PartialEq<extern "C" fn(A, B, C, D, E, ...) -> Ret> for extern "C" fn(A, B, C, D, E, ...) -> Ret1.4.0[src]

impl<Ret, A, B, C, D, E> PartialEq<unsafe fn(A, B, C, D, E) -> Ret> for unsafe fn(A, B, C, D, E) -> Ret1.4.0[src]

impl<Ret, A, B, C, D, E> PartialEq<unsafe extern "C" fn(A, B, C, D, E) -> Ret> for unsafe extern "C" fn(A, B, C, D, E) -> Ret1.4.0[src]

impl<Ret, A, B, C, D, E> PartialEq<unsafe extern "C" fn(A, B, C, D, E, ...) -> Ret> for unsafe extern "C" fn(A, B, C, D, E, ...) -> Ret1.4.0[src]

impl<Ret, A, B, C, D, E, F> PartialEq<fn(A, B, C, D, E, F) -> Ret> for fn(A, B, C, D, E, F) -> Ret1.4.0[src]

impl<Ret, A, B, C, D, E, F> PartialEq<extern "C" fn(A, B, C, D, E, F) -> Ret> for extern "C" fn(A, B, C, D, E, F) -> Ret1.4.0[src]

impl<Ret, A, B, C, D, E, F> PartialEq<extern "C" fn(A, B, C, D, E, F, ...) -> Ret> for extern "C" fn(A, B, C, D, E, F, ...) -> Ret1.4.0[src]

impl<Ret, A, B, C, D, E, F> PartialEq<unsafe fn(A, B, C, D, E, F) -> Ret> for unsafe fn(A, B, C, D, E, F) -> Ret1.4.0[src]

impl<Ret, A, B, C, D, E, F> PartialEq<unsafe extern "C" fn(A, B, C, D, E, F) -> Ret> for unsafe extern "C" fn(A, B, C, D, E, F) -> Ret1.4.0[src]

impl<Ret, A, B, C, D, E, F> PartialEq<unsafe extern "C" fn(A, B, C, D, E, F, ...) -> Ret> for unsafe extern "C" fn(A, B, C, D, E, F, ...) -> Ret1.4.0[src]

impl<Ret, A, B, C, D, E, F, G> PartialEq<fn(A, B, C, D, E, F, G) -> Ret> for fn(A, B, C, D, E, F, G) -> Ret1.4.0[src]

impl<Ret, A, B, C, D, E, F, G> PartialEq<extern "C" fn(A, B, C, D, E, F, G) -> Ret> for extern "C" fn(A, B, C, D, E, F, G) -> Ret1.4.0[src]

impl<Ret, A, B, C, D, E, F, G> PartialEq<extern "C" fn(A, B, C, D, E, F, G, ...) -> Ret> for extern "C" fn(A, B, C, D, E, F, G, ...) -> Ret1.4.0[src]

impl<Ret, A, B, C, D, E, F, G> PartialEq<unsafe fn(A, B, C, D, E, F, G) -> Ret> for unsafe fn(A, B, C, D, E, F, G) -> Ret1.4.0[src]

impl<Ret, A, B, C, D, E, F, G> PartialEq<unsafe extern "C" fn(A, B, C, D, E, F, G) -> Ret> for unsafe extern "C" fn(A, B, C, D, E, F, G) -> Ret1.4.0[src]

impl<Ret, A, B, C, D, E, F, G> PartialEq<unsafe extern "C" fn(A, B, C, D, E, F, G, ...) -> Ret> for unsafe extern "C" fn(A, B, C, D, E, F, G, ...) -> Ret1.4.0[src]

impl<Ret, A, B, C, D, E, F, G, H> PartialEq<fn(A, B, C, D, E, F, G, H) -> Ret> for fn(A, B, C, D, E, F, G, H) -> Ret1.4.0[src]

impl<Ret, A, B, C, D, E, F, G, H> PartialEq<extern "C" fn(A, B, C, D, E, F, G, H) -> Ret> for extern "C" fn(A, B, C, D, E, F, G, H) -> Ret1.4.0[src]

impl<Ret, A, B, C, D, E, F, G, H> PartialEq<extern "C" fn(A, B, C, D, E, F, G, H, ...) -> Ret> for extern "C" fn(A, B, C, D, E, F, G, H, ...) -> Ret1.4.0[src]

impl<Ret, A, B, C, D, E, F, G, H> PartialEq<unsafe fn(A, B, C, D, E, F, G, H) -> Ret> for unsafe fn(A, B, C, D, E, F, G, H) -> Ret1.4.0[src]

impl<Ret, A, B, C, D, E, F, G, H> PartialEq<unsafe extern "C" fn(A, B, C, D, E, F, G, H) -> Ret> for unsafe extern "C" fn(A, B, C, D, E, F, G, H) -> Ret1.4.0[src]

impl<Ret, A, B, C, D, E, F, G, H> PartialEq<unsafe extern "C" fn(A, B, C, D, E, F, G, H, ...) -> Ret> for unsafe extern "C" fn(A, B, C, D, E, F, G, H, ...) -> Ret1.4.0[src]

impl<Ret, A, B, C, D, E, F, G, H, I> PartialEq<fn(A, B, C, D, E, F, G, H, I) -> Ret> for fn(A, B, C, D, E, F, G, H, I) -> Ret1.4.0[src]

impl<Ret, A, B, C, D, E, F, G, H, I> PartialEq<extern "C" fn(A, B, C, D, E, F, G, H, I) -> Ret> for extern "C" fn(A, B, C, D, E, F, G, H, I) -> Ret1.4.0[src]

impl<Ret, A, B, C, D, E, F, G, H, I> PartialEq<extern "C" fn(A, B, C, D, E, F, G, H, I, ...) -> Ret> for extern "C" fn(A, B, C, D, E, F, G, H, I, ...) -> Ret1.4.0[src]

impl<Ret, A, B, C, D, E, F, G, H, I> PartialEq<unsafe fn(A, B, C, D, E, F, G, H, I) -> Ret> for unsafe fn(A, B, C, D, E, F, G, H, I) -> Ret1.4.0[src]

impl<Ret, A, B, C, D, E, F, G, H, I> PartialEq<unsafe extern "C" fn(A, B, C, D, E, F, G, H, I) -> Ret> for unsafe extern "C" fn(A, B, C, D, E, F, G, H, I) -> Ret1.4.0[src]

impl<Ret, A, B, C, D, E, F, G, H, I> PartialEq<unsafe extern "C" fn(A, B, C, D, E, F, G, H, I, ...) -> Ret> for unsafe extern "C" fn(A, B, C, D, E, F, G, H, I, ...) -> Ret1.4.0[src]

impl<Ret, A, B, C, D, E, F, G, H, I, J> PartialEq<fn(A, B, C, D, E, F, G, H, I, J) -> Ret> for fn(A, B, C, D, E, F, G, H, I, J) -> Ret1.4.0[src]

impl<Ret, A, B, C, D, E, F, G, H, I, J> PartialEq<extern "C" fn(A, B, C, D, E, F, G, H, I, J) -> Ret> for extern "C" fn(A, B, C, D, E, F, G, H, I, J) -> Ret1.4.0[src]

impl<Ret, A, B, C, D, E, F, G, H, I, J> PartialEq<extern "C" fn(A, B, C, D, E, F, G, H, I, J, ...) -> Ret> for extern "C" fn(A, B, C, D, E, F, G, H, I, J, ...) -> Ret1.4.0[src]

impl<Ret, A, B, C, D, E, F, G, H, I, J> PartialEq<unsafe fn(A, B, C, D, E, F, G, H, I, J) -> Ret> for unsafe fn(A, B, C, D, E, F, G, H, I, J) -> Ret1.4.0[src]

impl<Ret, A, B, C, D, E, F, G, H, I, J> PartialEq<unsafe extern "C" fn(A, B, C, D, E, F, G, H, I, J) -> Ret> for unsafe extern "C" fn(A, B, C, D, E, F, G, H, I, J) -> Ret1.4.0[src]

impl<Ret, A, B, C, D, E, F, G, H, I, J> PartialEq<unsafe extern "C" fn(A, B, C, D, E, F, G, H, I, J, ...) -> Ret> for unsafe extern "C" fn(A, B, C, D, E, F, G, H, I, J, ...) -> Ret1.4.0[src]

impl<Ret, A, B, C, D, E, F, G, H, I, J, K> PartialEq<fn(A, B, C, D, E, F, G, H, I, J, K) -> Ret> for fn(A, B, C, D, E, F, G, H, I, J, K) -> Ret1.4.0[src]

impl<Ret, A, B, C, D, E, F, G, H, I, J, K> PartialEq<extern "C" fn(A, B, C, D, E, F, G, H, I, J, K) -> Ret> for extern "C" fn(A, B, C, D, E, F, G, H, I, J, K) -> Ret1.4.0[src]

impl<Ret, A, B, C, D, E, F, G, H, I, J, K> PartialEq<extern "C" fn(A, B, C, D, E, F, G, H, I, J, K, ...) -> Ret> for extern "C" fn(A, B, C, D, E, F, G, H, I, J, K, ...) -> Ret1.4.0[src]

impl<Ret, A, B, C, D, E, F, G, H, I, J, K> PartialEq<unsafe fn(A, B, C, D, E, F, G, H, I, J, K) -> Ret> for unsafe fn(A, B, C, D, E, F, G, H, I, J, K) -> Ret1.4.0[src]

impl<Ret, A, B, C, D, E, F, G, H, I, J, K> PartialEq<unsafe extern "C" fn(A, B, C, D, E, F, G, H, I, J, K) -> Ret> for unsafe extern "C" fn(A, B, C, D, E, F, G, H, I, J, K) -> Ret1.4.0[src]

impl<Ret, A, B, C, D, E, F, G, H, I, J, K> PartialEq<unsafe extern "C" fn(A, B, C, D, E, F, G, H, I, J, K, ...) -> Ret> for unsafe extern "C" fn(A, B, C, D, E, F, G, H, I, J, K, ...) -> Ret1.4.0[src]

impl<Ret, A, B, C, D, E, F, G, H, I, J, K, L> PartialEq<fn(A, B, C, D, E, F, G, H, I, J, K, L) -> Ret> for fn(A, B, C, D, E, F, G, H, I, J, K, L) -> Ret1.4.0[src]

impl<Ret, A, B, C, D, E, F, G, H, I, J, K, L> PartialEq<extern "C" fn(A, B, C, D, E, F, G, H, I, J, K, L) -> Ret> for extern "C" fn(A, B, C, D, E, F, G, H, I, J, K, L) -> Ret1.4.0[src]

impl<Ret, A, B, C, D, E, F, G, H, I, J, K, L> PartialEq<extern "C" fn(A, B, C, D, E, F, G, H, I, J, K, L, ...) -> Ret> for extern "C" fn(A, B, C, D, E, F, G, H, I, J, K, L, ...) -> Ret1.4.0[src]

impl<Ret, A, B, C, D, E, F, G, H, I, J, K, L> PartialEq<unsafe fn(A, B, C, D, E, F, G, H, I, J, K, L) -> Ret> for unsafe fn(A, B, C, D, E, F, G, H, I, J, K, L) -> Ret1.4.0[src]

impl<Ret, A, B, C, D, E, F, G, H, I, J, K, L> PartialEq<unsafe extern "C" fn(A, B, C, D, E, F, G, H, I, J, K, L) -> Ret> for unsafe extern "C" fn(A, B, C, D, E, F, G, H, I, J, K, L) -> Ret1.4.0[src]

impl<Ret, A, B, C, D, E, F, G, H, I, J, K, L> PartialEq<unsafe extern "C" fn(A, B, C, D, E, F, G, H, I, J, K, L, ...) -> Ret> for unsafe extern "C" fn(A, B, C, D, E, F, G, H, I, J, K, L, ...) -> Ret1.4.0[src]

impl<T> PartialEq<Bound<T>> for Bound<T> where
    T: PartialEq<T>, 
1.17.0[src]

impl<T> PartialEq<Option<T>> for Option<T> where
    T: PartialEq<T>, 
[src]

impl<T> PartialEq<Poll<T>> for Poll<T> where
    T: PartialEq<T>, 
1.36.0[src]

impl<T> PartialEq<*const T> for *const T where
    T: ?Sized
[src]

impl<T> PartialEq<*mut T> for *mut T where
    T: ?Sized
[src]

impl<T> PartialEq<Cell<T>> for Cell<T> where
    T: PartialEq<T> + Copy
[src]

impl<T> PartialEq<RefCell<T>> for RefCell<T> where
    T: PartialEq<T> + ?Sized
[src]

pub fn eq(&self, other: &RefCell<T>) -> bool[src]

Panics

Panics if the value in either RefCell is currently borrowed.

impl<T> PartialEq<Reverse<T>> for Reverse<T> where
    T: PartialEq<T>, 
1.19.0[src]

impl<T> PartialEq<BTreeSet<T>> for BTreeSet<T> where
    T: PartialEq<T>, 
[src]

impl<T> PartialEq<LinkedList<T>> for LinkedList<T> where
    T: PartialEq<T>, 
[src]

impl<T> PartialEq<OnceCell<T>> for OnceCell<T> where
    T: PartialEq<T>, 
[src]

impl<T> PartialEq<PhantomData<T>> for PhantomData<T> where
    T: ?Sized
[src]

impl<T> PartialEq<Discriminant<T>> for Discriminant<T>1.21.0[src]

impl<T> PartialEq<ManuallyDrop<T>> for ManuallyDrop<T> where
    T: PartialEq<T> + ?Sized
1.20.0[src]

impl<T> PartialEq<Wrapping<T>> for Wrapping<T> where
    T: PartialEq<T>, 
[src]

impl<T> PartialEq<NonNull<T>> for NonNull<T> where
    T: ?Sized
1.25.0[src]

impl<T> PartialEq<Rc<T>> for Rc<T> where
    T: PartialEq<T> + ?Sized
[src]

pub fn eq(&self, other: &Rc<T>) -> bool[src]

Equality for two Rcs.

Two Rcs are equal if their inner values are equal, even if they are stored in different allocation.

If T also implements Eq (implying reflexivity of equality), two Rcs that point to the same allocation are always equal.

Examples

use std::rc::Rc;

let five = Rc::new(5);

assert!(five == Rc::new(5));
Run

pub fn ne(&self, other: &Rc<T>) -> bool[src]

Inequality for two Rcs.

Two Rcs are unequal if their inner values are unequal.

If T also implements Eq (implying reflexivity of equality), two Rcs that point to the same allocation are never unequal.

Examples

use std::rc::Rc;

let five = Rc::new(5);

assert!(five != Rc::new(6));
Run

impl<T> PartialEq<Arc<T>> for Arc<T> where
    T: PartialEq<T> + ?Sized
[src]

pub fn eq(&self, other: &Arc<T>) -> bool[src]

Equality for two Arcs.

Two Arcs are equal if their inner values are equal, even if they are stored in different allocation.

If T also implements Eq (implying reflexivity of equality), two Arcs that point to the same allocation are always equal.

Examples

use std::sync::Arc;

let five = Arc::new(5);

assert!(five == Arc::new(5));
Run

pub fn ne(&self, other: &Arc<T>) -> bool[src]

Inequality for two Arcs.

Two Arcs are unequal if their inner values are unequal.

If T also implements Eq (implying reflexivity of equality), two Arcs that point to the same value are never unequal.

Examples

use std::sync::Arc;

let five = Arc::new(5);

assert!(five != Arc::new(6));
Run

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

impl<T, E> PartialEq<Result<T, E>> for Result<T, E> where
    T: PartialEq<T>,
    E: PartialEq<E>, 
[src]

impl<T, S> PartialEq<HashSet<T, S>> for HashSet<T, S> where
    T: Eq + Hash,
    S: BuildHasher
[src]

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

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

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

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

impl<T: PartialEq> PartialEq<TrySendError<T>> for TrySendError<T>[src]

impl<T: PartialEq> PartialEq<Cursor<T>> for Cursor<T>[src]

impl<T: PartialEq> PartialEq<SyncOnceCell<T>> for SyncOnceCell<T>[src]

impl<T: PartialEq> PartialEq<SendError<T>> for SendError<T>[src]

impl<Y, R> PartialEq<GeneratorState<Y, R>> for GeneratorState<Y, R> where
    R: PartialEq<R>,
    Y: PartialEq<Y>, 
[src]

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