1.0.0[−][src]Struct std::ops::RangeTo
A range only bounded exclusively above (..end).
The RangeTo ..end contains all values with x < end.
It cannot serve as an Iterator because it doesn't have a starting point.
Examples
The ..end syntax is a RangeTo:
assert_eq!((..5), std::ops::RangeTo { end: 5 });Run
It does not have an IntoIterator implementation, so you can't use it in
a for loop directly. This won't compile:
// error[E0277]: the trait bound `std::ops::RangeTo<{integer}>: // std::iter::Iterator` is not satisfied for i in ..5 { // ... }Run
When used as a slicing index, RangeTo produces a slice of all array
elements before the index indicated by end.
let arr = [0, 1, 2, 3, 4]; assert_eq!(arr[ .. ], [0,1,2,3,4]); assert_eq!(arr[ .. 3], [0,1,2 ]); // RangeTo 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
Fields
end: IdxThe upper bound of the range (exclusive).
Implementations
impl<Idx> RangeTo<Idx> where
Idx: PartialOrd<Idx>, [src]
Idx: PartialOrd<Idx>,
pub fn contains<U>(&self, item: &U) -> bool where
Idx: PartialOrd<U>,
U: PartialOrd<Idx> + ?Sized, 1.35.0[src]
Idx: PartialOrd<U>,
U: PartialOrd<Idx> + ?Sized,
Trait Implementations
impl<Idx> Clone for RangeTo<Idx> where
Idx: Clone, [src]
Idx: Clone,
impl<Idx> Copy for RangeTo<Idx> where
Idx: Copy, [src]
Idx: Copy,
impl<Idx> Debug for RangeTo<Idx> where
Idx: Debug, [src]
Idx: Debug,
impl<Idx> Eq for RangeTo<Idx> where
Idx: Eq, [src]
Idx: Eq,
impl<Idx> Hash for RangeTo<Idx> where
Idx: Hash, [src]
Idx: Hash,
fn hash<__H>(&self, state: &mut __H) where
__H: Hasher, [src]
__H: Hasher,
fn hash_slice<H>(data: &[Self], state: &mut H) where
H: Hasher, 1.3.0[src]
H: Hasher,
impl Index<RangeTo<usize>> for String[src]
type Output = str
The returned type after indexing.
fn index(&self, index: RangeTo<usize>) -> &str[src]
impl IndexMut<RangeTo<usize>> for String1.3.0[src]
impl<Idx> PartialEq<RangeTo<Idx>> for RangeTo<Idx> where
Idx: PartialEq<Idx>, [src]
Idx: PartialEq<Idx>,
impl<T> RangeBounds<T> for RangeTo<T>1.28.0[src]
fn start_bound(&self) -> Bound<&T>[src]
fn end_bound(&self) -> Bound<&T>[src]
fn contains<U>(&self, item: &U) -> bool where
T: PartialOrd<U>,
U: PartialOrd<T> + ?Sized, 1.35.0[src]
T: PartialOrd<U>,
U: PartialOrd<T> + ?Sized,
impl<'_, T> RangeBounds<T> for RangeTo<&'_ T>1.28.0[src]
fn start_bound(&self) -> Bound<&T>[src]
fn end_bound(&self) -> Bound<&T>[src]
fn contains<U>(&self, item: &U) -> bool where
T: PartialOrd<U>,
U: PartialOrd<T> + ?Sized, 1.35.0[src]
T: PartialOrd<U>,
U: PartialOrd<T> + ?Sized,
impl<T> SliceIndex<[T]> for RangeTo<usize>1.15.0[src]
type Output = [T]
The output type returned by methods.
fn get(self, slice: &[T]) -> Option<&[T]>[src]
fn get_mut(self, slice: &mut [T]) -> Option<&mut [T]>[src]
unsafe fn get_unchecked(self, slice: *const [T]) -> *const [T][src]
unsafe fn get_unchecked_mut(self, slice: *mut [T]) -> *mut [T][src]
fn index(self, slice: &[T]) -> &[T]ⓘ[src]
fn index_mut(self, slice: &mut [T]) -> &mut [T]ⓘ[src]
impl SliceIndex<str> for RangeTo<usize>1.20.0[src]
Implements substring slicing with syntax &self[.. end] or &mut self[.. end].
Returns a slice of the given string from the byte range [0, end).
Equivalent to &self[0 .. end] or &mut self[0 .. end].
This operation is O(1).
Prior to 1.20.0, these indexing operations were still supported by
direct implementation of Index and IndexMut.
Panics
Panics if end does not point to the starting byte offset of a
character (as defined by is_char_boundary), or if end > len.
type Output = str
The output type returned by methods.
fn get(
self,
slice: &str
) -> Option<&<RangeTo<usize> as SliceIndex<str>>::Output>[src]
self,
slice: &str
) -> Option<&<RangeTo<usize> as SliceIndex<str>>::Output>
fn get_mut(
self,
slice: &mut str
) -> Option<&mut <RangeTo<usize> as SliceIndex<str>>::Output>[src]
self,
slice: &mut str
) -> Option<&mut <RangeTo<usize> as SliceIndex<str>>::Output>
unsafe fn get_unchecked(
self,
slice: *const str
) -> *const <RangeTo<usize> as SliceIndex<str>>::Output[src]
self,
slice: *const str
) -> *const <RangeTo<usize> as SliceIndex<str>>::Output
unsafe fn get_unchecked_mut(
self,
slice: *mut str
) -> *mut <RangeTo<usize> as SliceIndex<str>>::Output[src]
self,
slice: *mut str
) -> *mut <RangeTo<usize> as SliceIndex<str>>::Output
fn index(self, slice: &str) -> &<RangeTo<usize> as SliceIndex<str>>::Output[src]
fn index_mut(
self,
slice: &mut str
) -> &mut <RangeTo<usize> as SliceIndex<str>>::Output[src]
self,
slice: &mut str
) -> &mut <RangeTo<usize> as SliceIndex<str>>::Output
impl<Idx> StructuralEq for RangeTo<Idx>[src]
impl<Idx> StructuralPartialEq for RangeTo<Idx>[src]
Auto Trait Implementations
impl<Idx> RefUnwindSafe for RangeTo<Idx> where
Idx: RefUnwindSafe,
Idx: RefUnwindSafe,
impl<Idx> Send for RangeTo<Idx> where
Idx: Send,
Idx: Send,
impl<Idx> Sync for RangeTo<Idx> where
Idx: Sync,
Idx: Sync,
impl<Idx> Unpin for RangeTo<Idx> where
Idx: Unpin,
Idx: Unpin,
impl<Idx> UnwindSafe for RangeTo<Idx> where
Idx: UnwindSafe,
Idx: UnwindSafe,
Blanket Implementations
impl<T> Any for T where
T: 'static + ?Sized, [src]
T: 'static + ?Sized,
impl<T> Borrow<T> for T where
T: ?Sized, [src]
T: ?Sized,
fn borrow(&self) -> &TⓘNotable traits for &'_ mut F
impl<'_, F> Future for &'_ mut F where
F: Unpin + Future + ?Sized, type Output = <F as Future>::Output;impl<'_, I> Iterator for &'_ mut I where
I: Iterator + ?Sized, type Item = <I as Iterator>::Item;impl<R: Read + ?Sized, '_> Read for &'_ mut Rimpl<W: Write + ?Sized, '_> Write for &'_ mut W[src]
Notable traits for &'_ mut F
impl<'_, F> Future for &'_ mut F where
F: Unpin + Future + ?Sized, type Output = <F as Future>::Output;impl<'_, I> Iterator for &'_ mut I where
I: Iterator + ?Sized, type Item = <I as Iterator>::Item;impl<R: Read + ?Sized, '_> Read for &'_ mut Rimpl<W: Write + ?Sized, '_> Write for &'_ mut Wimpl<T> BorrowMut<T> for T where
T: ?Sized, [src]
T: ?Sized,
fn borrow_mut(&mut self) -> &mut TⓘNotable traits for &'_ mut F
impl<'_, F> Future for &'_ mut F where
F: Unpin + Future + ?Sized, type Output = <F as Future>::Output;impl<'_, I> Iterator for &'_ mut I where
I: Iterator + ?Sized, type Item = <I as Iterator>::Item;impl<R: Read + ?Sized, '_> Read for &'_ mut Rimpl<W: Write + ?Sized, '_> Write for &'_ mut W[src]
Notable traits for &'_ mut F
impl<'_, F> Future for &'_ mut F where
F: Unpin + Future + ?Sized, type Output = <F as Future>::Output;impl<'_, I> Iterator for &'_ mut I where
I: Iterator + ?Sized, type Item = <I as Iterator>::Item;impl<R: Read + ?Sized, '_> Read for &'_ mut Rimpl<W: Write + ?Sized, '_> Write for &'_ mut Wimpl<T> From<T> for T[src]
impl<T, U> Into<U> for T where
U: From<T>, [src]
U: From<T>,
impl<T> ToOwned for T where
T: Clone, [src]
T: Clone,
type Owned = T
The resulting type after obtaining ownership.
fn to_owned(&self) -> T[src]
fn clone_into(&self, target: &mut T)[src]
impl<T, U> TryFrom<U> for T where
U: Into<T>, [src]
U: Into<T>,
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]
impl<T, U> TryInto<U> for T where
U: TryFrom<T>, [src]
U: TryFrom<T>,