Trait core::cmp::PartialEq

#[lang = "eq"]pub trait PartialEq<Rhs: ?Sized = Self> {
#[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 and c):

• symmetric: a == b implies b == a; and
• transitive: a == b and b == c implies a == c.

Note that these requirements mean that the trait itself must be implemented symmetrically and transitively: if T: PartialEq<U> and U: PartialEq<V> then U: PartialEq<T> and T: PartialEq<V>.

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);

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);

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
}

Examples

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

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

Required methods

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

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

This method tests for !=.

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Implementors

impl PartialEq<!> for !

pub fn eq(&self, _: &!) -> bool

impl PartialEq<()> for ()

pub fn eq(&self, _other: &()) -> bool

pub fn ne(&self, _other: &()) -> bool

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

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

impl PartialEq<Infallible> for Infallible

pub fn eq(&self, _: &Infallible) -> bool

impl PartialEq<FpCategory> for FpCategory

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

impl PartialEq<IntErrorKind> for IntErrorKind

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

impl PartialEq<SearchStep> for SearchStep

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

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

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

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

impl PartialEq<AllocError> for AllocError

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

impl PartialEq<Layout> for Layout

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

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

impl PartialEq<LayoutError> for LayoutError

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

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

impl PartialEq<TypeId> for TypeId

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

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

impl PartialEq<CpuidResult> for CpuidResult

This is supported on x86 or x86-64 only.

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

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

impl PartialEq<CharTryFromError> for CharTryFromError

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

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

impl PartialEq<DecodeUtf16Error> for DecodeUtf16Error

pub fn eq(&self, other: &DecodeUtf16Error) -> bool

pub fn ne(&self, other: &DecodeUtf16Error) -> bool

impl PartialEq<ParseCharError> for ParseCharError

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

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

impl PartialEq<Error> for Error

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

impl PartialEq<PhantomPinned> for PhantomPinned

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

impl PartialEq<NonZeroI8> for NonZeroI8

pub fn eq(&self, other: &NonZeroI8) -> bool

pub fn ne(&self, other: &NonZeroI8) -> bool

impl PartialEq<NonZeroI16> for NonZeroI16

pub fn eq(&self, other: &NonZeroI16) -> bool

pub fn ne(&self, other: &NonZeroI16) -> bool

impl PartialEq<NonZeroI32> for NonZeroI32

pub fn eq(&self, other: &NonZeroI32) -> bool

pub fn ne(&self, other: &NonZeroI32) -> bool

impl PartialEq<NonZeroI64> for NonZeroI64

pub fn eq(&self, other: &NonZeroI64) -> bool

pub fn ne(&self, other: &NonZeroI64) -> bool

impl PartialEq<NonZeroI128> for NonZeroI128

pub fn eq(&self, other: &NonZeroI128) -> bool

pub fn ne(&self, other: &NonZeroI128) -> bool

impl PartialEq<NonZeroIsize> for NonZeroIsize

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

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

impl PartialEq<NonZeroU8> for NonZeroU8

pub fn eq(&self, other: &NonZeroU8) -> bool

pub fn ne(&self, other: &NonZeroU8) -> bool

impl PartialEq<NonZeroU16> for NonZeroU16

pub fn eq(&self, other: &NonZeroU16) -> bool

pub fn ne(&self, other: &NonZeroU16) -> bool

impl PartialEq<NonZeroU32> for NonZeroU32

pub fn eq(&self, other: &NonZeroU32) -> bool

pub fn ne(&self, other: &NonZeroU32) -> bool

impl PartialEq<NonZeroU64> for NonZeroU64

pub fn eq(&self, other: &NonZeroU64) -> bool

pub fn ne(&self, other: &NonZeroU64) -> bool

impl PartialEq<NonZeroU128> for NonZeroU128

pub fn eq(&self, other: &NonZeroU128) -> bool

pub fn ne(&self, other: &NonZeroU128) -> bool

impl PartialEq<NonZeroUsize> for NonZeroUsize

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

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

impl PartialEq<ParseFloatError> for ParseFloatError

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

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

impl PartialEq<ParseIntError> for ParseIntError

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

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

impl PartialEq<TryFromIntError> for TryFromIntError

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

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

impl PartialEq<RangeFull> for RangeFull

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

impl PartialEq<NoneError> for NoneError

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

impl PartialEq<ParseBoolError> for ParseBoolError

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

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

impl PartialEq<Utf8Error> for Utf8Error

pub fn eq(&self, other: &Utf8Error) -> bool

pub fn ne(&self, other: &Utf8Error) -> bool

impl PartialEq<RawWaker> for RawWaker

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

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

impl PartialEq<RawWakerVTable> for RawWakerVTable

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

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

impl PartialEq<Duration> for Duration

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

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

impl PartialEq<bool> for bool

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

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

impl PartialEq<char> for char

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

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

impl PartialEq<f32> for f32

pub fn eq(&self, other: &f32) -> bool

pub fn ne(&self, other: &f32) -> bool

impl PartialEq<f64> for f64

pub fn eq(&self, other: &f64) -> bool

pub fn ne(&self, other: &f64) -> bool

impl PartialEq<i8> for i8

pub fn eq(&self, other: &i8) -> bool

pub fn ne(&self, other: &i8) -> bool

impl PartialEq<i16> for i16

pub fn eq(&self, other: &i16) -> bool

pub fn ne(&self, other: &i16) -> bool

impl PartialEq<i32> for i32

pub fn eq(&self, other: &i32) -> bool

pub fn ne(&self, other: &i32) -> bool

impl PartialEq<i64> for i64

pub fn eq(&self, other: &i64) -> bool

pub fn ne(&self, other: &i64) -> bool

impl PartialEq<i128> for i128

pub fn eq(&self, other: &i128) -> bool

pub fn ne(&self, other: &i128) -> bool

impl PartialEq<isize> for isize

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

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

impl PartialEq<str> for str

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

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

impl PartialEq<u8> for u8

pub fn eq(&self, other: &u8) -> bool

pub fn ne(&self, other: &u8) -> bool

impl PartialEq<u16> for u16

pub fn eq(&self, other: &u16) -> bool

pub fn ne(&self, other: &u16) -> bool

impl PartialEq<u32> for u32

pub fn eq(&self, other: &u32) -> bool

pub fn ne(&self, other: &u32) -> bool

impl PartialEq<u64> for u64

pub fn eq(&self, other: &u64) -> bool

pub fn ne(&self, other: &u64) -> bool

impl PartialEq<u128> for u128

pub fn eq(&self, other: &u128) -> bool

pub fn ne(&self, other: &u128) -> bool

impl PartialEq<usize> for usize

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

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

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

pub fn eq(&self, other: &Location<'a>) -> bool

pub fn ne(&self, other: &Location<'a>) -> bool

impl<'a> PartialEq<Utf8LossyChunk<'a>> for Utf8LossyChunk<'a>

pub fn eq(&self, other: &Utf8LossyChunk<'a>) -> bool

pub fn ne(&self, other: &Utf8LossyChunk<'a>) -> bool

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

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

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

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

pub fn eq(&self, other: &[B]) -> bool

pub fn ne(&self, other: &[B]) -> bool

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

pub fn eq(&self, other: &&[B]) -> bool

pub fn ne(&self, other: &&[B]) -> bool

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

pub fn eq(&self, other: &&mut [B]) -> bool

pub fn ne(&self, other: &&mut [B]) -> bool

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

pub fn eq(&self, other: &[A; N]) -> bool

pub fn ne(&self, other: &[A; N]) -> bool

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

pub fn eq(&self, other: &[A; N]) -> bool

pub fn ne(&self, other: &[A; N]) -> bool

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

pub fn eq(&self, other: &[A; N]) -> bool

pub fn ne(&self, other: &[A; N]) -> bool

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

pub fn eq(&self, other: &[B; N]) -> bool

pub fn ne(&self, other: &[B; N]) -> bool

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

pub fn eq(&self, other: &[B]) -> bool

pub fn ne(&self, other: &[B]) -> bool

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

pub fn eq(&self, other: &(A, B)) -> bool

pub fn ne(&self, other: &(A, B)) -> bool

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

pub fn eq(&self, other: &(A, B, C)) -> bool

pub fn ne(&self, other: &(A, B, C)) -> bool

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

pub fn eq(&self, other: &(A, B, C, D)) -> bool

pub fn ne(&self, other: &(A, B, C, D)) -> bool

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

pub fn eq(&self, other: &(A, B, C, D, E)) -> bool

pub fn ne(&self, other: &(A, B, C, D, E)) -> bool

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

pub fn eq(&self, other: &(A, B, C, D, E, F)) -> bool

pub fn ne(&self, other: &(A, B, C, D, E, F)) -> bool

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

pub fn eq(&self, other: &(A, B, C, D, E, F, G)) -> bool

pub fn ne(&self, other: &(A, B, C, D, E, F, G)) -> bool

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

pub fn eq(&self, other: &(A, B, C, D, E, F, G, H)) -> bool

pub fn ne(&self, other: &(A, B, C, D, E, F, G, H)) -> bool

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

pub fn eq(&self, other: &(A, B, C, D, E, F, G, H, I)) -> bool

pub fn ne(&self, other: &(A, B, C, D, E, F, G, H, I)) -> bool

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

pub fn eq(&self, other: &(A, B, C, D, E, F, G, H, I, J)) -> bool

pub fn ne(&self, other: &(A, B, C, D, E, F, G, H, I, J)) -> bool

impl<A: PartialEq, B: PartialEq, C: PartialEq, D: PartialEq, E: PartialEq, F: PartialEq, G: PartialEq, H: PartialEq, I: PartialEq, J: PartialEq, 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
    K: PartialEq + ?Sized, 

pub fn eq(&self, other: &(A, B, C, D, E, F, G, H, I, J, K)) -> bool

pub fn ne(&self, other: &(A, B, C, D, E, F, G, H, I, J, K)) -> bool

impl<A: PartialEq, B: PartialEq, C: PartialEq, D: PartialEq, E: PartialEq, F: PartialEq, G: PartialEq, H: PartialEq, I: PartialEq, J: PartialEq, K: PartialEq, 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
    L: PartialEq + ?Sized, 

pub fn eq(&self, other: &(A, B, C, D, E, F, G, H, I, J, K, L)) -> bool

pub fn ne(&self, other: &(A, B, C, D, E, F, G, H, I, J, K, L)) -> bool

impl<A: ?Sized, B: ?Sized> PartialEq<&'_ B> for &A where
    A: PartialEq<B>, 

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

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

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

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

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

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

pub fn eq(&self, other: &&mut B) -> bool

pub fn ne(&self, other: &&mut B) -> bool

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

pub fn eq(&self, other: &&mut B) -> bool

pub fn ne(&self, other: &&mut B) -> bool

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

pub fn eq(&self, other: &ControlFlow<B, C>) -> bool

pub fn ne(&self, other: &ControlFlow<B, C>) -> bool

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

pub fn eq(&self, _other: &BuildHasherDefault<H>) -> bool

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

pub fn eq(&self, other: &Range<Idx>) -> bool

pub fn ne(&self, other: &Range<Idx>) -> bool

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

pub fn eq(&self, other: &RangeFrom<Idx>) -> bool

pub fn ne(&self, other: &RangeFrom<Idx>) -> bool

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

pub fn eq(&self, other: &RangeInclusive<Idx>) -> bool

pub fn ne(&self, other: &RangeInclusive<Idx>) -> bool

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

pub fn eq(&self, other: &RangeTo<Idx>) -> bool

pub fn ne(&self, other: &RangeTo<Idx>) -> bool

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

pub fn eq(&self, other: &RangeToInclusive<Idx>) -> bool

pub fn ne(&self, other: &RangeToInclusive<Idx>) -> bool

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

pub fn eq(&self, other: &Pin<Q>) -> bool

pub fn ne(&self, other: &Pin<Q>) -> bool

impl<Ret> PartialEq<extern "C" fn() -> Ret> for extern "C" fn() -> Ret

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

impl<Ret> PartialEq<fn() -> Ret> for fn() -> Ret

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

impl<Ret> PartialEq<unsafe extern "C" fn() -> Ret> for unsafe extern "C" fn() -> Ret

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

impl<Ret> PartialEq<unsafe fn() -> Ret> for unsafe fn() -> Ret

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

impl<Ret, A> PartialEq<extern "C" fn(A) -> Ret> for extern "C" fn(_: A) -> Ret

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

impl<Ret, A> PartialEq<extern "C" fn(A, ...) -> Ret> for extern "C" fn(_: A, ...) -> Ret

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

impl<Ret, A> PartialEq<fn(A) -> Ret> for fn(_: A) -> Ret

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

impl<Ret, A> PartialEq<unsafe extern "C" fn(A) -> Ret> for unsafe extern "C" fn(_: A) -> Ret

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

impl<Ret, A> PartialEq<unsafe extern "C" fn(A, ...) -> Ret> for unsafe extern "C" fn(_: A, ...) -> Ret

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

impl<Ret, A> PartialEq<unsafe fn(A) -> Ret> for unsafe fn(_: A) -> Ret

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

impl<Ret, A, B> PartialEq<extern "C" fn(A, B) -> Ret> for extern "C" fn(_: A, _: B) -> Ret

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

impl<Ret, A, B> PartialEq<extern "C" fn(A, B, ...) -> Ret> for extern "C" fn(_: A, _: B, ...) -> Ret

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

impl<Ret, A, B> PartialEq<fn(A, B) -> Ret> for fn(_: A, _: B) -> Ret

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

impl<Ret, A, B> PartialEq<unsafe extern "C" fn(A, B) -> Ret> for unsafe extern "C" fn(_: A, _: B) -> Ret

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

impl<Ret, A, B> PartialEq<unsafe extern "C" fn(A, B, ...) -> Ret> for unsafe extern "C" fn(_: A, _: B, ...) -> Ret

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

impl<Ret, A, B> PartialEq<unsafe fn(A, B) -> Ret> for unsafe fn(_: A, _: B) -> Ret

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

impl<Ret, A, B, C> PartialEq<extern "C" fn(A, B, C) -> Ret> for extern "C" fn(_: A, _: B, _: C) -> Ret

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

impl<Ret, A, B, C> PartialEq<extern "C" fn(A, B, C, ...) -> Ret> for extern "C" fn(_: A, _: B, _: C, ...) -> Ret

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

impl<Ret, A, B, C> PartialEq<fn(A, B, C) -> Ret> for fn(_: A, _: B, _: C) -> Ret

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

impl<Ret, A, B, C> PartialEq<unsafe extern "C" fn(A, B, C) -> Ret> for unsafe extern "C" fn(_: A, _: B, _: C) -> Ret

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

impl<Ret, A, B, C> PartialEq<unsafe extern "C" fn(A, B, C, ...) -> Ret> for unsafe extern "C" fn(_: A, _: B, _: C, ...) -> Ret

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

impl<Ret, A, B, C> PartialEq<unsafe fn(A, B, C) -> Ret> for unsafe fn(_: A, _: B, _: C) -> Ret

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

impl<Ret, A, B, C, D> PartialEq<extern "C" fn(A, B, C, D) -> Ret> for extern "C" fn(_: A, _: B, _: C, _: D) -> Ret

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

impl<Ret, A, B, C, D> PartialEq<extern "C" fn(A, B, C, D, ...) -> Ret> for extern "C" fn(_: A, _: B, _: C, _: D, ...) -> Ret

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

impl<Ret, A, B, C, D> PartialEq<fn(A, B, C, D) -> Ret> for fn(_: A, _: B, _: C, _: D) -> Ret

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

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) -> Ret

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

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, ...) -> Ret

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

impl<Ret, A, B, C, D> PartialEq<unsafe fn(A, B, C, D) -> Ret> for unsafe fn(_: A, _: B, _: C, _: D) -> Ret

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

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) -> Ret

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

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, ...) -> Ret

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

impl<Ret, A, B, C, D, E> PartialEq<fn(A, B, C, D, E) -> Ret> for fn(_: A, _: B, _: C, _: D, _: E) -> Ret

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

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) -> Ret

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

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, ...) -> Ret

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

impl<Ret, A, B, C, D, E> PartialEq<unsafe fn(A, B, C, D, E) -> Ret> for unsafe fn(_: A, _: B, _: C, _: D, _: E) -> Ret

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

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) -> Ret

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

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, ...) -> Ret

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

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) -> Ret

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

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) -> Ret

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

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, ...) -> Ret

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

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) -> Ret

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

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) -> Ret

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

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, ...) -> Ret

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

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) -> Ret

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

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) -> Ret

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

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, ...) -> Ret

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

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) -> Ret

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

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) -> Ret

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

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, ...) -> Ret

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

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) -> Ret

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

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) -> Ret

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

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, ...) -> Ret

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

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) -> Ret

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

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) -> Ret

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

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, ...) -> Ret

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

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) -> Ret

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

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) -> Ret

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

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, ...) -> Ret

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

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) -> Ret

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

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) -> Ret

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

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, ...) -> Ret

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

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) -> Ret

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

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) -> Ret

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

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, ...) -> Ret

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

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) -> Ret

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

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) -> Ret

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

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, ...) -> Ret

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

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) -> Ret

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

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) -> Ret

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

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, ...) -> Ret

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

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) -> Ret

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

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) -> Ret

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

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, ...) -> Ret

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

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) -> Ret

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

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) -> Ret

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

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, ...) -> Ret

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

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) -> Ret

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

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

pub fn eq(&self, rhs: &Self) -> bool

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

pub fn eq(&self, other: &Cell<T>) -> bool

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

pub fn eq(&self, other: &ManuallyDrop<T>) -> bool

pub fn ne(&self, other: &ManuallyDrop<T>) -> bool

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

pub fn eq(&self, other: &Bound<T>) -> bool

pub fn ne(&self, other: &Bound<T>) -> bool

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

pub fn eq(&self, other: &Option<T>) -> bool

pub fn ne(&self, other: &Option<T>) -> bool

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

pub fn eq(&self, other: &Poll<T>) -> bool

pub fn ne(&self, other: &Poll<T>) -> bool

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

pub fn eq(&self, other: &Reverse<T>) -> bool

pub fn ne(&self, other: &Reverse<T>) -> bool

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

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

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

pub fn eq(&self, other: &Wrapping<T>) -> bool

pub fn ne(&self, other: &Wrapping<T>) -> bool

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

pub fn eq(&self, other: &Result<T, E>) -> bool

pub fn ne(&self, other: &Result<T, E>) -> bool

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

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

Panics

Panics if the value in either RefCell is currently borrowed.

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

pub fn eq(&self, other: &*const T) -> bool

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

pub fn eq(&self, other: &*mut T) -> bool

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

pub fn eq(&self, _other: &PhantomData<T>) -> bool

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

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

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

pub fn eq(&self, other: &GeneratorState<Y, R>) -> bool

pub fn ne(&self, other: &GeneratorState<Y, R>) -> bool

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