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

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 code doesn't compile so be extra careful!
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 Clone for RangeFull
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Returns a copy of the value. Read more

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Performs copy-assignment from source. Read more

impl PartialEq for RangeFull
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This method tests for self and other values to be equal, and is used by ==. Read more

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This method tests for !=.

impl Eq for RangeFull
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impl Hash for RangeFull
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Feeds this value into the given [Hasher]. Read more

1.3.0
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Feeds a slice of this type into the given [Hasher]. Read more

impl Debug for RangeFull
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Formats the value using the given formatter.

impl<T> SliceIndex<[T]> for RangeFull
1.15.0
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🔬 This is a nightly-only experimental API. (slice_get_slice #35729)

The output type returned by methods.

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🔬 This is a nightly-only experimental API. (slice_get_slice #35729)

Returns a shared reference to the output at this location, if in bounds. Read more

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🔬 This is a nightly-only experimental API. (slice_get_slice #35729)

Returns a mutable reference to the output at this location, if in bounds. Read more

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🔬 This is a nightly-only experimental API. (slice_get_slice #35729)

Returns a shared reference to the output at this location, without performing any bounds checking. Read more

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🔬 This is a nightly-only experimental API. (slice_get_slice #35729)

Returns a mutable reference to the output at this location, without performing any bounds checking. Read more

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🔬 This is a nightly-only experimental API. (slice_get_slice #35729)

Returns a shared reference to the output at this location, panicking if out of bounds. Read more

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🔬 This is a nightly-only experimental API. (slice_get_slice #35729)

Returns a mutable reference to the output at this location, panicking if out of bounds. Read more

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.

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Performs the indexing (container[index]) operation.

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].

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Performs the mutable indexing (container[index]) operation.

impl SliceIndex<str> for RangeFull
1.20.0
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🔬 This is a nightly-only experimental API. (slice_get_slice #35729)

The output type returned by methods.

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🔬 This is a nightly-only experimental API. (slice_get_slice #35729)

Returns a shared reference to the output at this location, if in bounds. Read more

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🔬 This is a nightly-only experimental API. (slice_get_slice #35729)

Returns a mutable reference to the output at this location, if in bounds. Read more

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🔬 This is a nightly-only experimental API. (slice_get_slice #35729)

Returns a shared reference to the output at this location, without performing any bounds checking. Read more

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🔬 This is a nightly-only experimental API. (slice_get_slice #35729)

Returns a mutable reference to the output at this location, without performing any bounds checking. Read more

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🔬 This is a nightly-only experimental API. (slice_get_slice #35729)

Returns a shared reference to the output at this location, panicking if out of bounds. Read more

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🔬 This is a nightly-only experimental API. (slice_get_slice #35729)

Returns a mutable reference to the output at this location, panicking if out of bounds. Read more