Struct std::ops::RangeTo 1.0.0[−][src]
pub struct RangeTo<Idx> {
pub end: Idx,
}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 ]); // This is a `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]
impl<Idx> RangeTo<Idx> where
Idx: PartialOrd<Idx>, [src]pub fn contains<U>(&self, item: &U) -> bool where
U: PartialOrd<Idx> + ?Sized,
Idx: PartialOrd<U>, 1.35.0[src]
U: PartialOrd<Idx> + ?Sized,
Idx: PartialOrd<U>,
Trait Implementations
impl<T> RangeBounds<T> for RangeTo<T>1.28.0[src]
impl<T> RangeBounds<T> for RangeTo<T>1.28.0[src]pub fn start_bound(&self) -> Bound<&T>[src]
pub fn end_bound(&self) -> Bound<&T>[src]
pub 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]
impl<'_, T> RangeBounds<T> for RangeTo<&'_ T>1.28.0[src]pub fn start_bound(&self) -> Bound<&T>[src]
pub fn end_bound(&self) -> Bound<&T>[src]
pub 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]
impl<T> SliceIndex<[T]> for RangeTo<usize>1.15.0[src]type Output = [T]
The output type returned by methods.
pub fn get(self, slice: &[T]) -> Option<&[T]>[src]
pub fn get_mut(self, slice: &mut [T]) -> Option<&mut [T]>[src]
pub unsafe fn get_unchecked(self, slice: *const [T]) -> *const [T][src]
pub unsafe fn get_unchecked_mut(self, slice: *mut [T]) -> *mut [T][src]
pub fn index(self, slice: &[T]) -> &[T]ⓘ[src]
pub fn index_mut(self, slice: &mut [T]) -> &mut [T]ⓘ[src]
impl SliceIndex<str> for RangeTo<usize>1.20.0[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.
pub fn get(
self,
slice: &str
) -> Option<&<RangeTo<usize> as SliceIndex<str>>::Output>[src]
self,
slice: &str
) -> Option<&<RangeTo<usize> as SliceIndex<str>>::Output>
pub 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>
pub 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
pub 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
pub fn index(self, slice: &str) -> &<RangeTo<usize> as SliceIndex<str>>::Output[src]
pub 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> Copy for RangeTo<Idx> where
Idx: Copy, [src]
Idx: Copy,
impl<Idx> Eq for RangeTo<Idx> where
Idx: Eq, [src]
Idx: Eq,
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> Borrow<T> for T where
T: ?Sized, [src]
impl<T> Borrow<T> for T where
T: ?Sized, [src]pub fn borrow(&self) -> &TⓘNotable traits for &'_ mut F
impl<'_, F> Future for &'_ mut F where
F: Future + Unpin + ?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: Future + Unpin + ?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]
impl<T> BorrowMut<T> for T where
T: ?Sized, [src]pub fn borrow_mut(&mut self) -> &mut TⓘNotable traits for &'_ mut F
impl<'_, F> Future for &'_ mut F where
F: Future + Unpin + ?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: Future + Unpin + ?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