1.0.0[][src]Struct core::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.

Examples

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 .. {
   // ...
}Run

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

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

Trait Implementations

impl Copy for RangeFull
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impl Index<RangeFull> for str
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Implements substring slicing with syntax &self[..].

Returns a slice of the whole string. This operation can never panic.

Equivalent to &self[0 .. len].

The returned type after indexing.

impl IndexMut<RangeFull> for str
1.3.0
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Implements mutable substring slicing with syntax &mut self[..].

Returns a mutable slice of the whole string. This operation can never panic.

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

impl<T: ?Sized> RangeBounds<T> for RangeFull
1.28.0
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🔬 This is a nightly-only experimental API. (range_contains #32311)

recently added as per RFC

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

impl PartialEq<RangeFull> for RangeFull
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This method tests for !=.

impl Eq for RangeFull
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impl Clone for RangeFull
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Performs copy-assignment from source. Read more

impl<T> SliceIndex<[T]> for RangeFull
1.15.0
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The output type returned by methods.

impl SliceIndex<str> for RangeFull
1.20.0
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The output type returned by methods.

impl Hash for RangeFull
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Feeds a slice of this type into the given [Hasher]. Read more

impl Debug for RangeFull
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Auto Trait Implementations

impl Send for RangeFull

impl Sync for RangeFull

Blanket Implementations

impl<T, U> Into for T where
    U: From<T>, 
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impl<T> From for T
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impl<T, U> TryInto for T where
    U: TryFrom<T>, 
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🔬 This is a nightly-only experimental API. (try_from #33417)

The type returned in the event of a conversion error.

impl<T, U> TryFrom for T where
    T: From<U>, 
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🔬 This is a nightly-only experimental API. (try_from #33417)

The type returned in the event of a conversion error.

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