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/Rust

Struct std::ops::RangeFull

#[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);

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 .. {
   // ...
}

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  ]);

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 Index<RangeFull> for String[src]

type Output = str

The returned type after indexing.

impl Index<RangeFull> for CString[src]1.7.0

type Output = CStr

The returned type after indexing.

impl Index<RangeFull> for OsString[src]

type Output = OsStr

The returned type after indexing.

impl IndexMut<RangeFull> for String[src]1.3.0

impl IndexMut<RangeFull> for OsString[src]1.44.0

impl PartialEq<RangeFull> for RangeFull[src]

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

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

type Output = [T]

The output type returned by methods.

impl SliceIndex<str> for RangeFull[src]1.20.0

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 RefUnwindSafe for RangeFull

impl Send for RangeFull

impl Sync for RangeFull

impl Unpin for RangeFull

impl UnwindSafe for RangeFull

Blanket Implementations

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

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

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

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

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

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

type Owned = T

The resulting type after obtaining ownership.

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.

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.

© 2010 The Rust Project Developers
Licensed under the Apache License, Version 2.0 or the MIT license, at your option.
https://doc.rust-lang.org/std/ops/struct.RangeFull.html