std::ops::RangeFull - Rust
Description: API documentation for the Rust `RangeFull` struct in crate `std`.
Keywords: rust, rustlang, rust-lang, RangeFull

# 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.

# 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, 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 Eq for RangeFull`[src]

### `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 Hash for RangeFull`[src]

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

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

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

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

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

### `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` #0)

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` #0)

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

####
ⓘImportant traits for &'_ [u8]

### Important traits for &'_ [u8]

`impl<'_> Read for &'_ [u8]impl<'_> Write for &'_ mut [u8]`
`unsafe fn get_unchecked(self, slice: &[T]) -> &[T]`[src]

🔬 This is a nightly-only experimental API. (`slice_index_methods` #0)

Returns a shared reference to the output at this location, without performing any bounds checking. Calling this method with an out-of-bounds index is [undefined behavior] even if the resulting reference is not used. [undefined behavior]: ../../reference/behavior-considered-undefined.html Read more

####
ⓘImportant traits for &'_ [u8]

### Important traits for &'_ [u8]

`impl<'_> Read for &'_ [u8]impl<'_> Write for &'_ mut [u8]`
`unsafe fn get_unchecked_mut(self, slice: &mut [T]) -> &mut [T]`[src]

🔬 This is a nightly-only experimental API. (`slice_index_methods` #0)

Returns a mutable reference to the output at this location, without performing any bounds checking. Calling this method with an out-of-bounds index is [undefined behavior] even if the resulting reference is not used. [undefined behavior]: ../../reference/behavior-considered-undefined.html Read more

####
ⓘImportant traits for &'_ [u8]

### Important traits for &'_ [u8]

`impl<'_> Read for &'_ [u8]impl<'_> Write for &'_ mut [u8]`
`fn index(self, slice: &[T]) -> &[T]`[src]

🔬 This is a nightly-only experimental API. (`slice_index_methods` #0)

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

####
ⓘImportant traits for &'_ [u8]

### Important traits for &'_ [u8]

`impl<'_> Read for &'_ [u8]impl<'_> Write for &'_ mut [u8]`
`fn index_mut(self, slice: &mut [T]) -> &mut [T]`[src]

🔬 This is a nightly-only experimental API. (`slice_index_methods` #0)

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<&<RangeFull as SliceIndex<str>>::Output>`[src]

🔬 This is a nightly-only experimental API. (`slice_index_methods` #0)

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

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

🔬 This is a nightly-only experimental API. (`slice_index_methods` #0)

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

#### `unsafe fn get_unchecked(
self,
slice: &str
) -> &<RangeFull as SliceIndex<str>>::Output`[src]

🔬 This is a nightly-only experimental API. (`slice_index_methods` #0)

Returns a shared reference to the output at this location, without performing any bounds checking. Calling this method with an out-of-bounds index is [undefined behavior] even if the resulting reference is not used. [undefined behavior]: ../../reference/behavior-considered-undefined.html Read more

#### `unsafe fn get_unchecked_mut(
self,
slice: &mut str
) -> &mut <RangeFull as SliceIndex<str>>::Output`[src]

🔬 This is a nightly-only experimental API. (`slice_index_methods` #0)

Returns a mutable reference to the output at this location, without performing any bounds checking. Calling this method with an out-of-bounds index is [undefined behavior] even if the resulting reference is not used. [undefined behavior]: ../../reference/behavior-considered-undefined.html Read more

#### `fn index(self, slice: &str) -> &<RangeFull as SliceIndex<str>>::Output`[src]

🔬 This is a nightly-only experimental API. (`slice_index_methods` #0)

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 <RangeFull as SliceIndex<str>>::Output`[src]

🔬 This is a nightly-only experimental API. (`slice_index_methods` #0)

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

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

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

Formats the value using the given formatter. Read more

### `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 StructuralPartialEq for RangeFull`[src]

### `impl<T> RangeBounds<T> for RangeFull where
T: ?Sized,` 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>(&self, item: &U) -> bool where
T: PartialOrd<U>,
U: PartialOrd<T> + ?Sized,` 1.35.0[src]

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

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

### `impl IndexMut<RangeFull> for String` 1.3.0[src]

#### `fn index_mut(&mut self, _index: RangeFull) -> &mut str`[src]

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

### `impl Index<RangeFull> for String`[src]

#### `type Output = str`

The returned type after indexing.

#### `fn index(&self, _index: RangeFull) -> &str`[src]

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

### `impl Index<RangeFull> for CString` 1.7.0[src]

#### `type Output = CStr`

The returned type after indexing.

#### `fn index(&self, _index: RangeFull) -> &CStr`[src]

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

### `impl Index<RangeFull> for OsString`[src]

#### `type Output = OsStr`

The returned type after indexing.

#### `fn index(&self, _index: RangeFull) -> &OsStr`[src]

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

## Auto Trait Implementations

### `impl UnwindSafe for RangeFull`

### `impl RefUnwindSafe for RangeFull`

### `impl Unpin for RangeFull`

### `impl Send for RangeFull`

### `impl Sync for RangeFull`

## Blanket Implementations

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

#### `fn from(t: T) -> T`[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.

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

Performs the conversion.

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

#### `fn into(self) -> U`[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.

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

Performs the conversion.

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

####
ⓘImportant traits for &'_ mut I

### Important traits for &'_ mut I

`impl<'_, I> Iterator for &'_ mut I where
I: Iterator + ?Sized, type Item = <I as Iterator>::Item;impl<'_, F> Future for &'_ mut F where
F: Unpin + Future + ?Sized, type Output = <F as Future>::Output;impl<'_, R: Read + ?Sized> Read for &'_ mut Rimpl<'_, W: Write + ?Sized> Write for &'_ mut W`
`fn borrow(&self) -> &T`[src]

Immutably borrows from an owned value. Read more

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

####
ⓘImportant traits for &'_ mut I

### Important traits for &'_ mut I

`impl<'_, I> Iterator for &'_ mut I where
I: Iterator + ?Sized, type Item = <I as Iterator>::Item;impl<'_, F> Future for &'_ mut F where
F: Unpin + Future + ?Sized, type Output = <F as Future>::Output;impl<'_, R: Read + ?Sized> Read for &'_ mut Rimpl<'_, W: Write + ?Sized> Write for &'_ mut W`
`fn borrow_mut(&mut self) -> &mut T`[src]

Mutably borrows from an owned value. Read more

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

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

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

### `impl<T> ToOwned for T where
T: Clone,` [src]

#### `type Owned = T`

The resulting type after obtaining ownership.

#### `fn to_owned(&self) -> T`[src]

Creates owned data from borrowed data, usually by cloning. Read more

#### `fn clone_into(&self, target: &mut T)`[src]

🔬 This is a nightly-only experimental API. (`toowned_clone_into` #41263)

recently added

Uses borrowed data to replace owned data, usually by cloning. Read more