1.0.0[][src]Trait nom::lib::std::prelude::v1::v1::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 derived on structs, it will produce a lexicographic ordering based on the top-to-bottom declaration order of the struct's members. When derived 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
    }
}

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);
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Provided methods

#[must_use]pub fn max(self, other: Self) -> Self1.21.0[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));

#[must_use]pub fn min(self, other: Self) -> Self1.21.0[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));

#[must_use]pub fn clamp(self, min: Self, max: Self) -> Self1.50.0[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);
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Implementations on Foreign Types

impl Ord for IpAddr[src]

impl Ord for Path[src]

impl Ord for CStr[src]

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

impl Ord for SocketAddr[src]

impl Ord for ErrorKind[src]

impl Ord for Ipv6Addr[src]

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

impl Ord for CString[src]

impl Ord for PathBuf[src]

impl Ord for Ipv4Addr[src]

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

impl Ord for OsString[src]

impl Ord for SystemTime[src]

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

impl Ord for SocketAddrV4[src]

impl Ord for SocketAddrV6[src]

impl Ord for Instant[src]

impl Ord for OsStr[src]

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

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

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

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

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

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

impl Ord for NonZeroIsize[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]

impl Ord for u8[src]

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

impl Ord for u64[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]

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

Implements comparison of arrays lexicographically.

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

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

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

impl Ord for char[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]

impl Ord for NonZeroI16[src]

impl Ord for NonZeroU128[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.

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

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

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

impl Ord for i32[src]

impl<T> Ord for *mut T where
    T: ?Sized
[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<Ret, A, B, C> Ord for extern "C" fn(A, B, C, ...) -> Ret[src]

impl Ord for usize[src]

impl Ord for NonZeroI128[src]

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

impl<T> Ord for [T] where
    T: Ord
[src]

Implements comparison of vectors lexicographically.

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
    A: Ord,
    B: Ord,
    C: Ord,
    D: Ord,
    E: Ord,
    F: Ord,
    G: Ord,
    H: Ord,
    I: Ord,
    J: Ord,
    K: Ord + ?Sized
[src]

impl Ord for Duration[src]

impl Ord for u128[src]

impl<T> Ord for Poll<T> where
    T: Ord
[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]

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

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

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

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

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

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

impl Ord for i128[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]

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

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

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]

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

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

impl Ord for u16[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]

impl Ord for i8[src]

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

impl Ord for TypeId[src]

impl Ord for NonZeroU64[src]

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

impl Ord for isize[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]

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

impl Ord for CpuidResult[src]

impl Ord for bool[src]

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

impl Ord for NonZeroI32[src]

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

impl Ord for ()[src]

impl Ord for ![src]

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

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

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]

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

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

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

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

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

impl Ord for NonZeroU8[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]

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]

impl Ord for NonZeroU16[src]

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

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

impl Ord for u32[src]

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

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

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

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

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

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

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

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

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

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

impl Ord for NonZeroI8[src]

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

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

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

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

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

impl Ord for NonZeroUsize[src]

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

impl Ord for i64[src]

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

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

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

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

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

impl Ord for PhantomPinned[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]

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]

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

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

impl Ord for NonZeroU32[src]

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

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]

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

impl Ord for i16[src]

impl Ord for NonZeroI64[src]

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

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

Comparison for two Arcs.

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)));

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

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

Comparison for two Rcs.

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)));

impl<R> Ord for BitSel<R> where
    R: Ord + BitRegister
[src]

impl<O, V> Ord for BitArray<O, V> where
    O: BitOrder,
    V: BitView
[src]

impl<R> Ord for BitPos<R> where
    R: Ord + BitRegister
[src]

impl<R> Ord for BitMask<R> where
    R: Ord + BitRegister
[src]

impl<R> Ord for BitTail<R> where
    R: Ord + BitRegister
[src]

impl Ord for Lsb0[src]

impl<O, T> Ord for BitSlice<O, T> where
    O: BitOrder,
    T: BitStore
[src]

impl<O, T> Ord for BitBox<O, T> where
    O: BitOrder,
    T: BitStore
[src]

impl<R> Ord for BitIdx<R> where
    R: Ord + BitRegister
[src]

impl Ord for Msb0[src]

impl<O, T> Ord for BitVec<O, T> where
    O: BitOrder,
    T: BitStore
[src]

impl Ord for Error[src]

impl Ord for ErrorCode[src]

impl<A> Ord for ArrayVec<A> where
    A: Array,
    <A as Array>::Item: Ord
[src]

impl<A> Ord for ArrayString<A> where
    A: Array<Item = u8> + Copy
[src]

impl<T> Ord for CapacityError<T> where
    T: Ord
[src]

impl Ord for Span

impl Ord for ClassBytesRange

impl Ord for Utf8Sequence

impl Ord for Position

impl Ord for Literal

impl Ord for ClassUnicodeRange

impl Ord for Utf8Range

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Implementors

impl Ord for Ordering[src]

impl Ord for Infallible[src]

impl Ord for nom::lib::std::fmt::Error[src]

impl Ord for NoneError[src]

impl Ord for String[src]

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

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

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

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

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

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

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

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

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

impl<T, A> Ord for Vec<T, A> where
    A: AllocRef,
    T: Ord
[src]

Implements ordering of vectors, lexicographically.

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

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

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