Struct core::ops::RangeFull1.0.0[][src]

#[lang = "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);

It does not have an IntoIterator implementation, so you can't use it in a for loop directly. This won't 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]); // This is the `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   ]);

Trait Implementations

impl Clone for RangeFull[src]

impl Copy for RangeFull[src]

impl Debug for RangeFull[src]

impl Default for RangeFull[src]

impl Eq for RangeFull[src]

impl Hash for RangeFull[src]

impl PartialEq<RangeFull> for RangeFull[src]

impl<T: ?Sized> RangeBounds<T> for RangeFull1.28.0[src]

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

type Output = [T]

The output type returned by methods.

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 StructuralEq for RangeFull[src]

impl StructuralPartialEq for RangeFull[src]

Auto Trait Implementations

impl Send for RangeFull[src]

impl Sync for RangeFull[src]

impl Unpin for RangeFull[src]

Blanket Implementations

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

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

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

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

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

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> 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.