std::cmp::Ord - Rust
Description: API documentation for the Rust `Ord` trait in crate `std`.
Keywords: rust, rustlang, rust-lang, Ord

# 1.0.0[−][src]Trait std::cmp::Ord

    pub trait Ord: Eq + PartialOrd<Self> {
    #[must_use]    pub fn cmp(&self, other: &Self) -> Ordering;

    #[must_use]    pub fn max(self, other: Self) -> Self { ... }
    #[must_use]    pub fn min(self, other: Self) -> Self { ... }
    #[must_use]    pub fn clamp(self, min: Self, max: Self) -> Self { ... }
    }

Trait for types that form a total order.

An order is a total order if it is (for all `a`, `b` and `c`):

- total and asymmetric: exactly one of `a < b`, `a == b` or `a > b` is true; and
- transitive, `a < b` and `b < c` implies `a < c`. The same must hold for both `==` and `>`.

## Derivable

This trait can be used with `#[derive]`. When `derive`d on structs, it will produce a lexicographic ordering based on the top-to-bottom declaration order of the struct's members. When `derive`d on enums, variants are ordered by their top-to-bottom discriminant order.

## Lexicographical comparison

Lexicographical comparison is an operation with the following properties:

- Two sequences are compared element by element.
- The first mismatching element defines which sequence is lexicographically less or greater than the other.
- If one sequence is a prefix of another, the shorter sequence is lexicographically less than the other.
- If two sequence have equivalent elements and are of the same length, then the sequences are lexicographically equal.
- An empty sequence is lexicographically less than any non-empty sequence.
- Two empty sequences are lexicographically equal.

## How can I implement `Ord`?

`Ord` requires that the type also be `PartialOrd` and `Eq` (which requires `PartialEq`).

Then you must define an implementation for `cmp`. You may find it useful to use `cmp` on your type's fields.

Implementations of `PartialEq`, `PartialOrd`, and `Ord` must agree with each other. That is, `a.cmp(b) == Ordering::Equal` if and only if `a == b` and `Some(a.cmp(b)) == a.partial_cmp(b)` for all `a` and `b`. It's easy to accidentally make them disagree by deriving some of the traits and manually implementing others.

Here's an example where you want to sort people by height only, disregarding `id` and `name`:

    use std::cmp::Ordering;

    #[derive(Eq)]
    struct Person {
        id: u32,
        name: String,
        height: u32,
    }

    impl Ord for Person {
        fn cmp(&self, other: &Self) -> Ordering {
            self.height.cmp(&other.height)
        }
    }

    impl PartialOrd for Person {
        fn partial_cmp(&self, other: &Self) -> Option<Ordering> {
            Some(self.cmp(other))
        }
    }

    impl PartialEq for Person {
        fn eq(&self, other: &Self) -> bool {
            self.height == other.height
        }
    }

Run

## Required methods

### `#[must_use]pub fn cmp(&self, other: &Self) -> Ordering`[src]

This method returns an `Ordering` between `self` and `other`.

By convention, `self.cmp(&other)` returns the ordering matching the expression `self <operator> other` if true.

# Examples

    use std::cmp::Ordering;

    assert_eq!(5.cmp(&10), Ordering::Less);
    assert_eq!(10.cmp(&5), Ordering::Greater);
    assert_eq!(5.cmp(&5), Ordering::Equal);

Run
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## Provided methods

### `#[must_use]pub fn max(self, other: Self) -> Self`1.21.0[src]

Compares and returns the maximum of two values.

Returns the second argument if the comparison determines them to be equal.

# Examples

    assert_eq!(2, 1.max(2));
    assert_eq!(2, 2.max(2));

Run

### `#[must_use]pub fn min(self, other: Self) -> Self`1.21.0[src]

Compares and returns the minimum of two values.

Returns the first argument if the comparison determines them to be equal.

# Examples

    assert_eq!(1, 1.min(2));
    assert_eq!(2, 2.min(2));

Run

### `#[must_use]pub fn clamp(self, min: Self, max: Self) -> Self`1.50.0[src]

Restrict a value to a certain interval.

Returns `max` if `self` is greater than `max`, and `min` if `self` is less than `min`. Otherwise this returns `self`.

# Panics

Panics if `min > max`.

# Examples

    assert!((-3).clamp(-2, 1) == -2);
    assert!(0.clamp(-2, 1) == 0);
    assert!(2.clamp(-2, 1) == 1);

Run
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## Implementors

### `impl Ord for Ordering`[src]

#### `pub fn cmp(&self, other: &Ordering) -> Ordering`[src]

### `impl Ord for Infallible`[src]

#### `pub fn cmp(&self, _other: &Infallible) -> Ordering`[src]

### `impl Ord for ErrorKind`[src]

#### `fn cmp(&self, other: &ErrorKind) -> Ordering`[src]

### `impl Ord for IpAddr`[src]

#### `fn cmp(&self, other: &IpAddr) -> Ordering`[src]

### `impl Ord for SocketAddr`[src]

#### `fn cmp(&self, other: &SocketAddr) -> Ordering`[src]

### `impl Ord for bool`[src]

#### `pub fn cmp(&self, other: &bool) -> Ordering`[src]

### `impl Ord for char`[src]

#### `pub fn cmp(&self, other: &char) -> Ordering`[src]

### `impl Ord for i8`[src]

#### `pub fn cmp(&self, other: &i8) -> Ordering`[src]

### `impl Ord for i16`[src]

#### `pub fn cmp(&self, other: &i16) -> Ordering`[src]

### `impl Ord for i32`[src]

#### `pub fn cmp(&self, other: &i32) -> Ordering`[src]

### `impl Ord for i64`[src]

#### `pub fn cmp(&self, other: &i64) -> Ordering`[src]

### `impl Ord for i128`[src]

#### `pub fn cmp(&self, other: &i128) -> Ordering`[src]

### `impl Ord for isize`[src]

#### `pub fn cmp(&self, other: &isize) -> Ordering`[src]

### `impl Ord for !`[src]

#### `pub fn cmp(&self, &!) -> Ordering`[src]

### `impl Ord for str`[src]

Implements ordering of strings.

Strings are ordered lexicographically by their byte values. This orders Unicode code points based on their positions in the code charts. This is not necessarily the same as "alphabetical" order, which varies by language and locale. Sorting strings according to culturally-accepted standards requires locale-specific data that is outside the scope of the `str` type.

#### `pub fn cmp(&self, other: &str) -> Ordering`[src]

### `impl Ord for u8`[src]

#### `pub fn cmp(&self, other: &u8) -> Ordering`[src]

### `impl Ord for u16`[src]

#### `pub fn cmp(&self, other: &u16) -> Ordering`[src]

### `impl Ord for u32`[src]

#### `pub fn cmp(&self, other: &u32) -> Ordering`[src]

### `impl Ord for u64`[src]

#### `pub fn cmp(&self, other: &u64) -> Ordering`[src]

### `impl Ord for u128`[src]

#### `pub fn cmp(&self, other: &u128) -> Ordering`[src]

### `impl Ord for ()`[src]

#### `pub fn cmp(&self, _other: &()) -> Ordering`[src]

### `impl Ord for usize`[src]

#### `pub fn cmp(&self, other: &usize) -> Ordering`[src]

### `impl Ord for TypeId`[src]

#### `pub fn cmp(&self, other: &TypeId) -> Ordering`[src]

### `impl Ord for CStr`[src]

#### `fn cmp(&self, other: &CStr) -> Ordering`[src]

### `impl Ord for CString`[src]

#### `fn cmp(&self, other: &CString) -> Ordering`[src]

### `impl Ord for OsStr`[src]

#### `fn cmp(&self, other: &OsStr) -> Ordering`[src]

### `impl Ord for OsString`[src]

#### `fn cmp(&self, other: &OsString) -> Ordering`[src]

### `impl Ord for Error`[src]

#### `pub fn cmp(&self, other: &Error) -> Ordering`[src]

### `impl Ord for PhantomPinned`[src]

#### `pub fn cmp(&self, other: &PhantomPinned) -> Ordering`[src]

### `impl Ord for Ipv4Addr`[src]

#### `fn cmp(&self, other: &Ipv4Addr) -> Ordering`[src]

### `impl Ord for Ipv6Addr`[src]

#### `fn cmp(&self, other: &Ipv6Addr) -> Ordering`[src]

### `impl Ord for SocketAddrV4`[src]

#### `fn cmp(&self, other: &SocketAddrV4) -> Ordering`[src]

### `impl Ord for SocketAddrV6`[src]

#### `fn cmp(&self, other: &SocketAddrV6) -> Ordering`[src]

### `impl Ord for NonZeroI8`[src]

#### `pub fn cmp(&self, other: &NonZeroI8) -> Ordering`[src]

### `impl Ord for NonZeroI16`[src]

#### `pub fn cmp(&self, other: &NonZeroI16) -> Ordering`[src]

### `impl Ord for NonZeroI32`[src]

#### `pub fn cmp(&self, other: &NonZeroI32) -> Ordering`[src]

### `impl Ord for NonZeroI64`[src]

#### `pub fn cmp(&self, other: &NonZeroI64) -> Ordering`[src]

### `impl Ord for NonZeroI128`[src]

#### `pub fn cmp(&self, other: &NonZeroI128) -> Ordering`[src]

### `impl Ord for NonZeroIsize`[src]

#### `pub fn cmp(&self, other: &NonZeroIsize) -> Ordering`[src]

### `impl Ord for NonZeroU8`[src]

#### `pub fn cmp(&self, other: &NonZeroU8) -> Ordering`[src]

### `impl Ord for NonZeroU16`[src]

#### `pub fn cmp(&self, other: &NonZeroU16) -> Ordering`[src]

### `impl Ord for NonZeroU32`[src]

#### `pub fn cmp(&self, other: &NonZeroU32) -> Ordering`[src]

### `impl Ord for NonZeroU64`[src]

#### `pub fn cmp(&self, other: &NonZeroU64) -> Ordering`[src]

### `impl Ord for NonZeroU128`[src]

#### `pub fn cmp(&self, other: &NonZeroU128) -> Ordering`[src]

### `impl Ord for NonZeroUsize`[src]

#### `pub fn cmp(&self, other: &NonZeroUsize) -> Ordering`[src]

### `impl Ord for NoneError`[src]

#### `pub fn cmp(&self, other: &NoneError) -> Ordering`[src]

### `impl Ord for Components<'_>`[src]

#### `fn cmp(&self, other: &Self) -> Ordering`[src]

### `impl Ord for Path`[src]

#### `fn cmp(&self, other: &Path) -> Ordering`[src]

### `impl Ord for PathBuf`[src]

#### `fn cmp(&self, other: &PathBuf) -> Ordering`[src]

### `impl Ord for PrefixComponent<'_>`[src]

#### `fn cmp(&self, other: &Self) -> Ordering`[src]

### `impl Ord for String`[src]

#### `pub fn cmp(&self, other: &String) -> Ordering`[src]

### `impl Ord for Duration`[src]

#### `pub fn cmp(&self, other: &Duration) -> Ordering`[src]

### `impl Ord for Instant`[src]

#### `fn cmp(&self, other: &Instant) -> Ordering`[src]

### `impl Ord for SystemTime`[src]

#### `fn cmp(&self, other: &SystemTime) -> Ordering`[src]

### `impl<'_, A> Ord for &'_ A where
A: Ord + ?Sized,` [src]

#### `pub fn cmp(&self, other: &&'_ A) -> Ordering`[src]

### `impl<'_, A> Ord for &'_ mut A where
A: Ord + ?Sized,` [src]

#### `pub fn cmp(&self, other: &&'_ mut A) -> Ordering`[src]

### `impl<'_, B> Ord for Cow<'_, B> where
B: Ord + ToOwned + ?Sized,` [src]

#### `pub fn cmp(&self, other: &Cow<'_, B>) -> Ordering`[src]

### `impl<'a> Ord for Component<'a>`[src]

#### `fn cmp(&self, other: &Component<'a>) -> Ordering`[src]

### `impl<'a> Ord for Prefix<'a>`[src]

#### `fn cmp(&self, other: &Prefix<'a>) -> Ordering`[src]

### `impl<'a> Ord for Location<'a>`[src]

#### `pub fn cmp(&self, other: &Location<'a>) -> Ordering`[src]

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

#### `pub fn cmp(&self, other: &(A,)) -> Ordering`[src]

### `impl<A> Ord for VecDeque<A> where
A: Ord,` [src]

#### `pub fn cmp(&self, other: &VecDeque<A>) -> Ordering`[src]

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

#### `pub fn cmp(&self, other: &(A, B)) -> Ordering`[src]

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

#### `pub fn cmp(&self, other: &(A, B, C)) -> Ordering`[src]

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

#### `pub fn cmp(&self, other: &(A, B, C, D)) -> Ordering`[src]

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

#### `pub fn cmp(&self, other: &(A, B, C, D, E)) -> Ordering`[src]

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

#### `pub fn cmp(&self, other: &(A, B, C, D, E, F)) -> Ordering`[src]

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

#### `pub fn cmp(&self, other: &(A, B, C, D, E, F, G)) -> Ordering`[src]

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

#### `pub fn cmp(&self, other: &(A, B, C, D, E, F, G, H)) -> Ordering`[src]

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

#### `pub fn cmp(&self, other: &(A, B, C, D, E, F, G, H, I)) -> Ordering`[src]

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

#### `pub fn cmp(&self, other: &(A, B, C, D, E, F, G, H, I, J)) -> Ordering`[src]

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

#### `pub fn cmp(&self, other: &(A, B, C, D, E, F, G, H, I, J, K)) -> Ordering`[src]

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

#### `pub fn cmp(&self, other: &(A, B, C, D, E, F, G, H, I, J, K, L)) -> Ordering`[src]

### `impl<K, V> Ord for BTreeMap<K, V> where
K: Ord,
V: Ord,` [src]

#### `pub fn cmp(&self, other: &BTreeMap<K, V>) -> Ordering`[src]

### `impl<P> Ord for Pin<P> where
P: Deref,
<P as Deref>::Target: Ord,` [src]

#### `pub fn cmp(&self, other: &Pin<P>) -> Ordering`[src]

### `impl<Ret> Ord for fn() -> Ret`[src]

#### `pub fn cmp(&self, other: &fn() -> Ret) -> Ordering`[src]

### `impl<Ret> Ord for extern "C" fn() -> Ret`[src]

#### `pub fn cmp(&self, other: &extern "C" fn() -> Ret) -> Ordering`[src]

### `impl<Ret> Ord for unsafe fn() -> Ret`[src]

#### `pub fn cmp(&self, other: &unsafe fn() -> Ret) -> Ordering`[src]

### `impl<Ret> Ord for unsafe extern "C" fn() -> Ret`[src]

#### `pub fn cmp(&self, other: &unsafe extern "C" fn() -> Ret) -> Ordering`[src]

### `impl<Ret, A> Ord for fn(A) -> Ret`[src]

#### `pub fn cmp(&self, other: &fn(A) -> Ret) -> Ordering`[src]

### `impl<Ret, A> Ord for extern "C" fn(A) -> Ret`[src]

#### `pub fn cmp(&self, other: &extern "C" fn(A) -> Ret) -> Ordering`[src]

### `impl<Ret, A> Ord for extern "C" fn(A, ...) -> Ret`[src]

#### `pub fn cmp(&self, other: &extern "C" fn(A, ...) -> Ret) -> Ordering`[src]

### `impl<Ret, A> Ord for unsafe fn(A) -> Ret`[src]

#### `pub fn cmp(&self, other: &unsafe fn(A) -> Ret) -> Ordering`[src]

### `impl<Ret, A> Ord for unsafe extern "C" fn(A) -> Ret`[src]

#### `pub fn cmp(&self, other: &unsafe extern "C" fn(A) -> Ret) -> Ordering`[src]

### `impl<Ret, A> Ord for unsafe extern "C" fn(A, ...) -> Ret`[src]

#### `pub fn cmp(&self, other: &unsafe extern "C" fn(A, ...) -> Ret) -> Ordering`[src]

### `impl<Ret, A, B> Ord for fn(A, B) -> Ret`[src]

#### `pub fn cmp(&self, other: &fn(A, B) -> Ret) -> Ordering`[src]

### `impl<Ret, A, B> Ord for extern "C" fn(A, B) -> Ret`[src]

#### `pub fn cmp(&self, other: &extern "C" fn(A, B) -> Ret) -> Ordering`[src]

### `impl<Ret, A, B> Ord for extern "C" fn(A, B, ...) -> Ret`[src]

#### `pub fn cmp(&self, other: &extern "C" fn(A, B, ...) -> Ret) -> Ordering`[src]

### `impl<Ret, A, B> Ord for unsafe fn(A, B) -> Ret`[src]

#### `pub fn cmp(&self, other: &unsafe fn(A, B) -> Ret) -> Ordering`[src]

### `impl<Ret, A, B> Ord for unsafe extern "C" fn(A, B) -> Ret`[src]

#### `pub fn cmp(&self, other: &unsafe extern "C" fn(A, B) -> Ret) -> Ordering`[src]

### `impl<Ret, A, B> Ord for unsafe extern "C" fn(A, B, ...) -> Ret`[src]

#### `pub fn cmp(&self, other: &unsafe extern "C" fn(A, B, ...) -> Ret) -> Ordering`[src]

### `impl<Ret, A, B, C> Ord for fn(A, B, C) -> Ret`[src]

#### `pub fn cmp(&self, other: &fn(A, B, C) -> Ret) -> Ordering`[src]

### `impl<Ret, A, B, C> Ord for extern "C" fn(A, B, C) -> Ret`[src]

#### `pub fn cmp(&self, other: &extern "C" fn(A, B, C) -> Ret) -> Ordering`[src]

### `impl<Ret, A, B, C> Ord for extern "C" fn(A, B, C, ...) -> Ret`[src]

#### `pub fn cmp(&self, other: &extern "C" fn(A, B, C, ...) -> Ret) -> Ordering`[src]

### `impl<Ret, A, B, C> Ord for unsafe fn(A, B, C) -> Ret`[src]

#### `pub fn cmp(&self, other: &unsafe fn(A, B, C) -> Ret) -> Ordering`[src]

### `impl<Ret, A, B, C> Ord for unsafe extern "C" fn(A, B, C) -> Ret`[src]

#### `pub fn cmp(&self, other: &unsafe extern "C" fn(A, B, C) -> Ret) -> Ordering`[src]

### `impl<Ret, A, B, C> Ord for unsafe extern "C" fn(A, B, C, ...) -> Ret`[src]

#### `pub fn cmp(&self, other: &unsafe extern "C" fn(A, B, C, ...) -> Ret) -> Ordering`[src]

### `impl<Ret, A, B, C, D> Ord for fn(A, B, C, D) -> Ret`[src]

#### `pub fn cmp(&self, other: &fn(A, B, C, D) -> Ret) -> Ordering`[src]

### `impl<Ret, A, B, C, D> Ord for extern "C" fn(A, B, C, D) -> Ret`[src]

#### `pub fn cmp(&self, other: &extern "C" fn(A, B, C, D) -> Ret) -> Ordering`[src]

### `impl<Ret, A, B, C, D> Ord for extern "C" fn(A, B, C, D, ...) -> Ret`[src]

#### `pub fn cmp(&self, other: &extern "C" fn(A, B, C, D, ...) -> Ret) -> Ordering`[src]

### `impl<Ret, A, B, C, D> Ord for unsafe fn(A, B, C, D) -> Ret`[src]

#### `pub fn cmp(&self, other: &unsafe fn(A, B, C, D) -> Ret) -> Ordering`[src]

### `impl<Ret, A, B, C, D> Ord for unsafe extern "C" fn(A, B, C, D) -> Ret`[src]

#### `pub fn cmp(&self, other: &unsafe extern "C" fn(A, B, C, D) -> Ret) -> Ordering`[src]

### `impl<Ret, A, B, C, D> Ord for unsafe extern "C" fn(A, B, C, D, ...) -> Ret`[src]

#### `pub fn cmp(
&self,
other: &unsafe extern "C" fn(A, B, C, D, ...) -> Ret
) -> Ordering`[src]

### `impl<Ret, A, B, C, D, E> Ord for fn(A, B, C, D, E) -> Ret`[src]

#### `pub fn cmp(&self, other: &fn(A, B, C, D, E) -> Ret) -> Ordering`[src]

### `impl<Ret, A, B, C, D, E> Ord for extern "C" fn(A, B, C, D, E) -> Ret`[src]

#### `pub fn cmp(&self, other: &extern "C" fn(A, B, C, D, E) -> Ret) -> Ordering`[src]

### `impl<Ret, A, B, C, D, E> Ord for extern "C" fn(A, B, C, D, E, ...) -> Ret`[src]

#### `pub fn cmp(&self, other: &extern "C" fn(A, B, C, D, E, ...) -> Ret) -> Ordering`[src]

### `impl<Ret, A, B, C, D, E> Ord for unsafe fn(A, B, C, D, E) -> Ret`[src]

#### `pub fn cmp(&self, other: &unsafe fn(A, B, C, D, E) -> Ret) -> Ordering`[src]

### `impl<Ret, A, B, C, D, E> Ord for unsafe extern "C" fn(A, B, C, D, E) -> Ret`[src]

#### `pub fn cmp(
&self,
other: &unsafe extern "C" fn(A, B, C, D, E) -> Ret
) -> Ordering`[src]

### `impl<Ret, A, B, C, D, E> Ord for unsafe extern "C" fn(A, B, C, D, E, ...) -> Ret`[src]

#### `pub fn cmp(
&self,
other: &unsafe extern "C" fn(A, B, C, D, E, ...) -> Ret
) -> Ordering`[src]

### `impl<Ret, A, B, C, D, E, F> Ord for fn(A, B, C, D, E, F) -> Ret`[src]

#### `pub fn cmp(&self, other: &fn(A, B, C, D, E, F) -> Ret) -> Ordering`[src]

### `impl<Ret, A, B, C, D, E, F> Ord for extern "C" fn(A, B, C, D, E, F) -> Ret`[src]

#### `pub fn cmp(&self, other: &extern "C" fn(A, B, C, D, E, F) -> Ret) -> Ordering`[src]

### `impl<Ret, A, B, C, D, E, F> Ord for extern "C" fn(A, B, C, D, E, F, ...) -> Ret`[src]

#### `pub fn cmp(
&self,
other: &extern "C" fn(A, B, C, D, E, F, ...) -> Ret
) -> Ordering`[src]

### `impl<Ret, A, B, C, D, E, F> Ord for unsafe fn(A, B, C, D, E, F) -> Ret`[src]

#### `pub fn cmp(&self, other: &unsafe fn(A, B, C, D, E, F) -> Ret) -> Ordering`[src]

### `impl<Ret, A, B, C, D, E, F> Ord for unsafe extern "C" fn(A, B, C, D, E, F) -> Ret`[src]

#### `pub fn cmp(
&self,
other: &unsafe extern "C" fn(A, B, C, D, E, F) -> Ret
) -> Ordering`[src]

### `impl<Ret, A, B, C, D, E, F> Ord for unsafe extern "C" fn(A, B, C, D, E, F, ...) -> Ret`[src]

#### `pub fn cmp(
&self,
other: &unsafe extern "C" fn(A, B, C, D, E, F, ...) -> Ret
) -> Ordering`[src]

### `impl<Ret, A, B, C, D, E, F, G> Ord for fn(A, B, C, D, E, F, G) -> Ret`[src]

#### `pub fn cmp(&self, other: &fn(A, B, C, D, E, F, G) -> Ret) -> Ordering`[src]

### `impl<Ret, A, B, C, D, E, F, G> Ord for extern "C" fn(A, B, C, D, E, F, G) -> Ret`[src]

#### `pub fn cmp(&self, other: &extern "C" fn(A, B, C, D, E, F, G) -> Ret) -> Ordering`[src]

### `impl<Ret, A, B, C, D, E, F, G> Ord for extern "C" fn(A, B, C, D, E, F, G, ...) -> Ret`[src]

#### `pub fn cmp(
&self,
other: &extern "C" fn(A, B, C, D, E, F, G, ...) -> Ret
) -> Ordering`[src]

### `impl<Ret, A, B, C, D, E, F, G> Ord for unsafe fn(A, B, C, D, E, F, G) -> Ret`[src]

#### `pub fn cmp(&self, other: &unsafe fn(A, B, C, D, E, F, G) -> Ret) -> Ordering`[src]

### `impl<Ret, A, B, C, D, E, F, G> Ord for unsafe extern "C" fn(A, B, C, D, E, F, G) -> Ret`[src]

#### `pub fn cmp(
&self,
other: &unsafe extern "C" fn(A, B, C, D, E, F, G) -> Ret
) -> Ordering`[src]

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

#### `pub fn cmp(
&self,
other: &unsafe extern "C" fn(A, B, C, D, E, F, G, ...) -> Ret
) -> Ordering`[src]

### `impl<Ret, A, B, C, D, E, F, G, H> Ord for fn(A, B, C, D, E, F, G, H) -> Ret`[src]

#### `pub fn cmp(&self, other: &fn(A, B, C, D, E, F, G, H) -> Ret) -> Ordering`[src]

### `impl<Ret, A, B, C, D, E, F, G, H> Ord for extern "C" fn(A, B, C, D, E, F, G, H) -> Ret`[src]

#### `pub fn cmp(
&self,
other: &extern "C" fn(A, B, C, D, E, F, G, H) -> Ret
) -> Ordering`[src]

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

#### `pub fn cmp(
&self,
other: &extern "C" fn(A, B, C, D, E, F, G, H, ...) -> Ret
) -> Ordering`[src]

### `impl<Ret, A, B, C, D, E, F, G, H> Ord for unsafe fn(A, B, C, D, E, F, G, H) -> Ret`[src]

#### `pub fn cmp(&self, other: &unsafe fn(A, B, C, D, E, F, G, H) -> Ret) -> Ordering`[src]

### `impl<Ret, A, B, C, D, E, F, G, H> Ord for unsafe extern "C" fn(A, B, C, D, E, F, G, H) -> Ret`[src]

#### `pub fn cmp(
&self,
other: &unsafe extern "C" fn(A, B, C, D, E, F, G, H) -> Ret
) -> Ordering`[src]

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

#### `pub fn cmp(
&self,
other: &unsafe extern "C" fn(A, B, C, D, E, F, G, H, ...) -> Ret
) -> Ordering`[src]

### `impl<Ret, A, B, C, D, E, F, G, H, I> Ord for fn(A, B, C, D, E, F, G, H, I) -> Ret`[src]

#### `pub fn cmp(&self, other: &fn(A, B, C, D, E, F, G, H, I) -> Ret) -> Ordering`[src]

### `impl<Ret, A, B, C, D, E, F, G, H, I> Ord for extern "C" fn(A, B, C, D, E, F, G, H, I) -> Ret`[src]

#### `pub fn cmp(
&self,
other: &extern "C" fn(A, B, C, D, E, F, G, H, I) -> Ret
) -> Ordering`[src]

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

#### `pub fn cmp(
&self,
other: &extern "C" fn(A, B, C, D, E, F, G, H, I, ...) -> Ret
) -> Ordering`[src]

### `impl<Ret, A, B, C, D, E, F, G, H, I> Ord for unsafe fn(A, B, C, D, E, F, G, H, I) -> Ret`[src]

#### `pub fn cmp(
&self,
other: &unsafe fn(A, B, C, D, E, F, G, H, I) -> Ret
) -> Ordering`[src]

### `impl<Ret, A, B, C, D, E, F, G, H, I> Ord for unsafe extern "C" fn(A, B, C, D, E, F, G, H, I) -> Ret`[src]

#### `pub fn cmp(
&self,
other: &unsafe extern "C" fn(A, B, C, D, E, F, G, H, I) -> Ret
) -> Ordering`[src]

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

#### `pub fn cmp(
&self,
other: &unsafe extern "C" fn(A, B, C, D, E, F, G, H, I, ...) -> Ret
) -> Ordering`[src]

### `impl<Ret, A, B, C, D, E, F, G, H, I, J> Ord for fn(A, B, C, D, E, F, G, H, I, J) -> Ret`[src]

#### `pub fn cmp(&self, other: &fn(A, B, C, D, E, F, G, H, I, J) -> Ret) -> Ordering`[src]

### `impl<Ret, A, B, C, D, E, F, G, H, I, J> Ord for extern "C" fn(A, B, C, D, E, F, G, H, I, J) -> Ret`[src]

#### `pub fn cmp(
&self,
other: &extern "C" fn(A, B, C, D, E, F, G, H, I, J) -> Ret
) -> Ordering`[src]

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

#### `pub fn cmp(
&self,
other: &extern "C" fn(A, B, C, D, E, F, G, H, I, J, ...) -> Ret
) -> Ordering`[src]

### `impl<Ret, A, B, C, D, E, F, G, H, I, J> Ord for unsafe fn(A, B, C, D, E, F, G, H, I, J) -> Ret`[src]

#### `pub fn cmp(
&self,
other: &unsafe fn(A, B, C, D, E, F, G, H, I, J) -> Ret
) -> Ordering`[src]

### `impl<Ret, A, B, C, D, E, F, G, H, I, J> Ord for unsafe extern "C" fn(A, B, C, D, E, F, G, H, I, J) -> Ret`[src]

#### `pub fn cmp(
&self,
other: &unsafe extern "C" fn(A, B, C, D, E, F, G, H, I, J) -> Ret
) -> Ordering`[src]

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

#### `pub fn cmp(
&self,
other: &unsafe extern "C" fn(A, B, C, D, E, F, G, H, I, J, ...) -> Ret
) -> Ordering`[src]

### `impl<Ret, A, B, C, D, E, F, G, H, I, J, K> Ord for fn(A, B, C, D, E, F, G, H, I, J, K) -> Ret`[src]

#### `pub fn cmp(
&self,
other: &fn(A, B, C, D, E, F, G, H, I, J, K) -> Ret
) -> Ordering`[src]

### `impl<Ret, A, B, C, D, E, F, G, H, I, J, K> Ord for extern "C" fn(A, B, C, D, E, F, G, H, I, J, K) -> Ret`[src]

#### `pub fn cmp(
&self,
other: &extern "C" fn(A, B, C, D, E, F, G, H, I, J, K) -> Ret
) -> Ordering`[src]

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

#### `pub fn cmp(
&self,
other: &extern "C" fn(A, B, C, D, E, F, G, H, I, J, K, ...) -> Ret
) -> Ordering`[src]

### `impl<Ret, A, B, C, D, E, F, G, H, I, J, K> Ord for unsafe fn(A, B, C, D, E, F, G, H, I, J, K) -> Ret`[src]

#### `pub fn cmp(
&self,
other: &unsafe fn(A, B, C, D, E, F, G, H, I, J, K) -> Ret
) -> Ordering`[src]

### `impl<Ret, A, B, C, D, E, F, G, H, I, J, K> Ord for unsafe extern "C" fn(A, B, C, D, E, F, G, H, I, J, K) -> Ret`[src]

#### `pub fn cmp(
&self,
other: &unsafe extern "C" fn(A, B, C, D, E, F, G, H, I, J, K) -> Ret
) -> Ordering`[src]

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

#### `pub fn cmp(
&self,
other: &unsafe extern "C" fn(A, B, C, D, E, F, G, H, I, J, K, ...) -> Ret
) -> Ordering`[src]

### `impl<Ret, A, B, C, D, E, F, G, H, I, J, K, L> Ord for fn(A, B, C, D, E, F, G, H, I, J, K, L) -> Ret`[src]

#### `pub fn cmp(
&self,
other: &fn(A, B, C, D, E, F, G, H, I, J, K, L) -> Ret
) -> Ordering`[src]

### `impl<Ret, A, B, C, D, E, F, G, H, I, J, K, L> Ord for extern "C" fn(A, B, C, D, E, F, G, H, I, J, K, L) -> Ret`[src]

#### `pub fn cmp(
&self,
other: &extern "C" fn(A, B, C, D, E, F, G, H, I, J, K, L) -> Ret
) -> Ordering`[src]

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

#### `pub fn cmp(
&self,
other: &extern "C" fn(A, B, C, D, E, F, G, H, I, J, K, L, ...) -> Ret
) -> Ordering`[src]

### `impl<Ret, A, B, C, D, E, F, G, H, I, J, K, L> Ord for unsafe fn(A, B, C, D, E, F, G, H, I, J, K, L) -> Ret`[src]

#### `pub fn cmp(
&self,
other: &unsafe fn(A, B, C, D, E, F, G, H, I, J, K, L) -> Ret
) -> Ordering`[src]

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

#### `pub fn cmp(
&self,
other: &unsafe extern "C" fn(A, B, C, D, E, F, G, H, I, J, K, L) -> Ret
) -> Ordering`[src]

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

#### `pub fn cmp(
&self,
other: &unsafe extern "C" fn(A, B, C, D, E, F, G, H, I, J, K, L, ...) -> Ret
) -> Ordering`[src]

### `impl<T> Ord for Option<T> where
T: Ord,` [src]

#### `pub fn cmp(&self, other: &Option<T>) -> Ordering`[src]

### `impl<T> Ord for Poll<T> where
T: Ord,` [src]

#### `pub fn cmp(&self, other: &Poll<T>) -> Ordering`[src]

### `impl<T> Ord for *const T where
T: ?Sized,` [src]

#### `pub fn cmp(&self, other: &*const T) -> Ordering`[src]

### `impl<T> Ord for *mut T where
T: ?Sized,` [src]

#### `pub fn cmp(&self, other: &*mut T) -> Ordering`[src]

### `impl<T> Ord for [T] where
T: Ord,` [src]

Implements comparison of vectors lexicographically.

#### `pub fn cmp(&self, other: &[T]) -> Ordering`[src]

### `impl<T> Ord for Cell<T> where
T: Ord + Copy,` [src]

#### `pub fn cmp(&self, other: &Cell<T>) -> Ordering`[src]

### `impl<T> Ord for RefCell<T> where
T: Ord + ?Sized,` [src]

#### `pub fn cmp(&self, other: &RefCell<T>) -> Ordering`[src]

# Panics

Panics if the value in either `RefCell` is currently borrowed.

### `impl<T> Ord for Reverse<T> where
T: Ord,` [src]

#### `pub fn cmp(&self, other: &Reverse<T>) -> Ordering`[src]

### `impl<T> Ord for BTreeSet<T> where
T: Ord,` [src]

#### `pub fn cmp(&self, other: &BTreeSet<T>) -> Ordering`[src]

### `impl<T> Ord for LinkedList<T> where
T: Ord,` [src]

#### `pub fn cmp(&self, other: &LinkedList<T>) -> Ordering`[src]

### `impl<T> Ord for PhantomData<T> where
T: ?Sized,` [src]

#### `pub fn cmp(&self, _other: &PhantomData<T>) -> Ordering`[src]

### `impl<T> Ord for ManuallyDrop<T> where
T: Ord + ?Sized,` [src]

#### `pub fn cmp(&self, other: &ManuallyDrop<T>) -> Ordering`[src]

### `impl<T> Ord for Wrapping<T> where
T: Ord,` [src]

#### `pub fn cmp(&self, other: &Wrapping<T>) -> Ordering`[src]

### `impl<T> Ord for NonNull<T> where
T: ?Sized,` [src]

#### `pub fn cmp(&self, other: &NonNull<T>) -> Ordering`[src]

### `impl<T> Ord for Rc<T> where
T: Ord + ?Sized,` [src]

#### `pub fn cmp(&self, other: &Rc<T>) -> Ordering`[src]

Comparison for two `Rc`s.

The two are compared by calling `cmp()` on their inner values.

# Examples

    use std::rc::Rc;
    use std::cmp::Ordering;

    let five = Rc::new(5);

    assert_eq!(Ordering::Less, five.cmp(&Rc::new(6)));

Run

### `impl<T> Ord for Arc<T> where
T: Ord + ?Sized,` [src]

#### `pub fn cmp(&self, other: &Arc<T>) -> Ordering`[src]

Comparison for two `Arc`s.

The two are compared by calling `cmp()` on their inner values.

# Examples

    use std::sync::Arc;
    use std::cmp::Ordering;

    let five = Arc::new(5);

    assert_eq!(Ordering::Less, five.cmp(&Arc::new(6)));

Run

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

#### `pub fn cmp(&self, other: &Box<T, A>) -> Ordering`[src]

### `impl<T, A> Ord for Vec<T, A> where
T: Ord,
A: Allocator,` [src]

Implements ordering of vectors, lexicographically.

#### `pub fn cmp(&self, other: &Vec<T, A>) -> Ordering`[src]

### `impl<T, E> Ord for Result<T, E> where
T: Ord,
E: Ord,` [src]

#### `pub fn cmp(&self, other: &Result<T, E>) -> Ordering`[src]

### `impl<T, const N: usize> Ord for [T; N] where
T: Ord,` [src]

Implements comparison of arrays lexicographically.

#### `pub fn cmp(&self, other: &[T; N]) -> Ordering`[src]

### `impl<Y, R> Ord for GeneratorState<Y, R> where
R: Ord,
Y: Ord,` [src]

#### `pub fn cmp(&self, other: &GeneratorState<Y, R>) -> Ordering`[src]

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