# Struct core::ops::RangeFull 1.0.0[−][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.

# 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:

ⓘ

    for i in .. {
        // ...
    }

Run

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   ]);

Run

## Trait Implementations

### `impl Clone for RangeFull`[src]

#### `fn clone(&self) -> RangeFull`[src]

Returns a copy of the value. Read more

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

Performs copy-assignment from `source`. Read more

### `impl Copy for RangeFull`[src]

### `impl Debug for RangeFull`[src]

#### `fn fmt(&self, fmt: &mut Formatter<'_>) -> Result`[src]

Formats the value using the given formatter. Read more

### `impl Default for RangeFull`[src]

#### `fn default() -> RangeFull`[src]

Returns the “default value” for a type. Read more

### `impl Eq for RangeFull`[src]

### `impl Hash for RangeFull`[src]

#### `fn hash<__H: Hasher>(&self, state: &mut __H)`[src]

Feeds this value into the given `Hasher`. Read more

#### `fn hash_slice<H: Hasher>(data: &[Self], state: &mut H) where
Self: Sized,` 1.3.0[src]

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

### `impl PartialEq<RangeFull> for RangeFull`[src]

#### `fn eq(&self, other: &RangeFull) -> bool`[src]

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

#### `#[must_use]fn ne(&self, other: &Rhs) -> bool`[src]

This method tests for `!=`.

### `impl<T: ?Sized> RangeBounds<T> for RangeFull` 1.28.0[src]

#### `fn start_bound(&self) -> Bound<&T>`[src]

Start index bound. Read more

#### `fn end_bound(&self) -> Bound<&T>`[src]

End index bound. Read more

#### `fn contains<U: ?Sized>(&self, item: &U) -> bool where
T: PartialOrd<U>,
U: PartialOrd<T>,` 1.35.0[src]

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

### `impl<T> SliceIndex<[T]> for RangeFull` 1.15.0[src]

#### `type Output = [T]`

The output type returned by methods.

#### `fn get(self, slice: &[T]) -> Option<&[T]>`[src]

🔬 This is a nightly-only experimental API. (`slice_index_methods`)

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

#### `fn get_mut(self, slice: &mut [T]) -> Option<&mut [T]>`[src]

🔬 This is a nightly-only experimental API. (`slice_index_methods`)

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

#### `unsafe fn get_unchecked(self, slice: *const [T]) -> *const [T]`[src]

🔬 This is a nightly-only experimental API. (`slice_index_methods`)

Returns a shared reference to the output at this location, without performing any bounds checking. Calling this method with an out-of-bounds index or a dangling `slice` pointer is undefined behavior even if the resulting reference is not used. Read more

#### `unsafe fn get_unchecked_mut(self, slice: *mut [T]) -> *mut [T]`[src]

🔬 This is a nightly-only experimental API. (`slice_index_methods`)

Returns a mutable reference to the output at this location, without performing any bounds checking. Calling this method with an out-of-bounds index or a dangling `slice` pointer is undefined behavior even if the resulting reference is not used. Read more

#### `fn index(self, slice: &[T]) -> &[T]`[src]

🔬 This is a nightly-only experimental API. (`slice_index_methods`)

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

#### `fn index_mut(self, slice: &mut [T]) -> &mut [T]`[src]

🔬 This is a nightly-only experimental API. (`slice_index_methods`)

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

### `impl SliceIndex<str> for RangeFull` 1.20.0[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.

#### `fn get(self, slice: &str) -> Option<&Self::Output>`[src]

🔬 This is a nightly-only experimental API. (`slice_index_methods`)

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

#### `fn get_mut(self, slice: &mut str) -> Option<&mut Self::Output>`[src]

🔬 This is a nightly-only experimental API. (`slice_index_methods`)

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

#### `unsafe fn get_unchecked(self, slice: *const str) -> *const Self::Output`[src]

🔬 This is a nightly-only experimental API. (`slice_index_methods`)

Returns a shared reference to the output at this location, without performing any bounds checking. Calling this method with an out-of-bounds index or a dangling `slice` pointer is undefined behavior even if the resulting reference is not used. Read more

#### `unsafe fn get_unchecked_mut(self, slice: *mut str) -> *mut Self::Output`[src]

🔬 This is a nightly-only experimental API. (`slice_index_methods`)

Returns a mutable reference to the output at this location, without performing any bounds checking. Calling this method with an out-of-bounds index or a dangling `slice` pointer is undefined behavior even if the resulting reference is not used. Read more

#### `fn index(self, slice: &str) -> &Self::Output`[src]

🔬 This is a nightly-only experimental API. (`slice_index_methods`)

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

#### `fn index_mut(self, slice: &mut str) -> &mut Self::Output`[src]

🔬 This is a nightly-only experimental API. (`slice_index_methods`)

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

### `impl StructuralEq for RangeFull`[src]

### `impl StructuralPartialEq for RangeFull`[src]

## Auto Trait Implementations

### `impl Send for RangeFull`

### `impl Sync for RangeFull`

### `impl Unpin for RangeFull`

## Blanket Implementations

### `impl<T> Any for T where
T: 'static + ?Sized,` [src]

#### `pub fn type_id(&Self) -> TypeId`[src]

Gets the `TypeId` of `self`. Read more

### `impl<T> Borrow<T> for T where
T: ?Sized,` [src]

#### `pub fn borrow(&Self) -> &T`[src]

Immutably borrows from an owned value. Read more

### `impl<T> BorrowMut<T> for T where
T: ?Sized,` [src]

#### `pub fn borrow_mut(&mut Self) -> &mut T`[src]

Mutably borrows from an owned value. Read more

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

#### `pub fn from(T) -> T`[src]

Performs the conversion.

### `impl<T, U> Into<U> for T where
U: From<T>,` [src]

#### `pub fn into(Self) -> U`[src]

Performs the conversion.

### `impl<T, U> TryFrom<U> for T where
U: Into<T>,` [src]

#### `type Error = Infallible`

The type returned in the event of a conversion error.

#### `pub fn try_from(U) -> Result<T, <T as TryFrom<U>>::Error>`[src]

Performs the conversion.

### `impl<T, U> TryInto<U> for T where
U: TryFrom<T>,` [src]

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

The type returned in the event of a conversion error.

#### `pub fn try_into(Self) -> Result<U, <U as TryFrom<T>>::Error>`[src]

Performs the conversion.