1.0.0[][src]Struct std::ops::RangeFull

pub struct RangeFull;

An unbounded range (..).

RangeFull is primarily used as a slicing index, its shorthand is ... It cannot serve as an Iterator because it doesn't have a starting point.


The .. syntax is a RangeFull:

assert_eq!((..), std::ops::RangeFull);Run

It does not have an IntoIterator implementation, so you can't use it in a for loop directly. This won't compile:

This example deliberately fails to compile
for i in .. {
   // ...

Used as a slicing index, RangeFull produces the full array as a slice.

let arr = [0, 1, 2, 3, 4];
assert_eq!(arr[ ..  ], [0,1,2,3,4]);  // RangeFull
assert_eq!(arr[ .. 3], [0,1,2    ]);
assert_eq!(arr[ ..=3], [0,1,2,3  ]);
assert_eq!(arr[1..  ], [  1,2,3,4]);
assert_eq!(arr[1.. 3], [  1,2    ]);
assert_eq!(arr[1..=3], [  1,2,3  ]);Run

Trait Implementations

impl<T> RangeBounds<T> for RangeFull where
    T: ?Sized

fn contains<U>(&self, item: &U) -> bool where
    T: PartialOrd<U>,
    U: PartialOrd<T> + ?Sized

Returns true if item is contained in the range. Read more

impl Hash for RangeFull[src]

fn hash_slice<H>(data: &[Self], state: &mut H) where
    H: Hasher

Feeds a slice of this type into the given [Hasher]. Read more

impl Eq for RangeFull[src]

impl Clone for RangeFull[src]

fn clone_from(&mut self, source: &Self)[src]

Performs copy-assignment from source. Read more

impl Debug for RangeFull[src]

impl SliceIndex<str> for RangeFull1.20.0[src]

Implements substring slicing with syntax &self[..] or &mut self[..].

Returns a slice of the whole string, i.e., returns &self or &mut self. Equivalent to &self[0 .. len] or &mut self[0 .. len]. Unlike other indexing operations, this can never panic.

This operation is O(1).

Prior to 1.20.0, these indexing operations were still supported by direct implementation of Index and IndexMut.

Equivalent to &self[0 .. len] or &mut self[0 .. len].

type Output = str

The output type returned by methods.

impl<T> SliceIndex<[T]> for RangeFull1.15.0[src]

type Output = [T]

The output type returned by methods.

impl Copy for RangeFull[src]

impl PartialEq<RangeFull> for RangeFull[src]

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

This method tests for !=.

impl IndexMut<RangeFull> for String1.3.0[src]

impl Index<RangeFull> for String[src]

type Output = str

The returned type after indexing.

impl Index<RangeFull> for CString1.7.0[src]

type Output = CStr

The returned type after indexing.

impl Index<RangeFull> for OsString[src]

type Output = OsStr

The returned type after indexing.

Auto Trait Implementations

impl Send for RangeFull

impl Sync for RangeFull

Blanket Implementations

impl<T> From<T> for T[src]

impl<T, U> TryFrom<U> for T where
    U: Into<T>, 

type Error = Infallible

The type returned in the event of a conversion error.

impl<T, U> Into<U> for T where
    U: From<T>, 

impl<T, U> TryInto<U> for T where
    U: TryFrom<T>, 

type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.

impl<T> Borrow<T> for T where
    T: ?Sized

impl<T> BorrowMut<T> for T where
    T: ?Sized

impl<T> Any for T where
    T: 'static + ?Sized

impl<T> ToOwned for T where
    T: Clone

type Owned = T

The resulting type after obtaining ownership.