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]; assert_eq!(arr[ .. ], [0,1,2,3]); assert_eq!(arr[ ..3], [0,1,2 ]); // RangeTo assert_eq!(arr[1.. ], [ 1,2,3]); assert_eq!(arr[1..3], [ 1,2 ]);Run
Fields
end: Idx
The upper bound of the range (exclusive).
Methods
impl<Idx> RangeTo<Idx> where
Idx: PartialOrd<Idx>, [src]
impl<Idx> RangeTo<Idx> where
Idx: PartialOrd<Idx>, pub fn contains<U>(&self, item: &U) -> bool where
Idx: PartialOrd<U>,
U: PartialOrd<Idx> + ?Sized, [src]
pub fn contains<U>(&self, item: &U) -> bool where
Idx: PartialOrd<U>,
U: PartialOrd<Idx> + ?Sized, 🔬 This is a nightly-only experimental API. (range_contains #32311)
recently added as per RFC
Returns true if item is contained in the range.
Examples
#![feature(range_contains)] use std::f32; assert!( (..5).contains(&-1_000_000_000)); assert!( (..5).contains(&4)); assert!(!(..5).contains(&5)); assert!( (..1.0).contains(&0.5)); assert!(!(..1.0).contains(&f32::NAN)); assert!(!(..f32::NAN).contains(&0.5));Run
Trait Implementations
impl<T> RangeBounds<T> for RangeTo<T>1.28.0[src]
impl<T> RangeBounds<T> for RangeTo<T>fn start_bound(&self) -> Bound<&T>[src]
fn start_bound(&self) -> Bound<&T>Start index bound. Read more
fn end_bound(&self) -> Bound<&T>[src]
fn end_bound(&self) -> Bound<&T>End index bound. Read more
fn contains<U>(&self, item: &U) -> bool where
T: PartialOrd<U>,
U: PartialOrd<T> + ?Sized, [src]
fn contains<U>(&self, item: &U) -> bool where
T: PartialOrd<U>,
U: PartialOrd<T> + ?Sized, 🔬 This is a nightly-only experimental API. (range_contains #32311)
recently added as per RFC
Returns true if item is contained in the range. Read more
impl<'a, T> RangeBounds<T> for RangeTo<&'a T>1.28.0[src]
impl<'a, T> RangeBounds<T> for RangeTo<&'a T>fn start_bound(&self) -> Bound<&T>[src]
fn start_bound(&self) -> Bound<&T>Start index bound. Read more
fn end_bound(&self) -> Bound<&T>[src]
fn end_bound(&self) -> Bound<&T>End index bound. Read more
fn contains<U>(&self, item: &U) -> bool where
T: PartialOrd<U>,
U: PartialOrd<T> + ?Sized, [src]
fn contains<U>(&self, item: &U) -> bool where
T: PartialOrd<U>,
U: PartialOrd<T> + ?Sized, 🔬 This is a nightly-only experimental API. (range_contains #32311)
recently added as per RFC
Returns true if item is contained in the range. Read more
impl<Idx> Hash for RangeTo<Idx> where
Idx: Hash, [src]
impl<Idx> Hash for RangeTo<Idx> where
Idx: Hash, fn hash<__HIdx>(&self, state: &mut __HIdx) where
__HIdx: Hasher, [src]
fn hash<__HIdx>(&self, state: &mut __HIdx) where
__HIdx: Hasher, 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]
fn hash_slice<H>(data: &[Self], state: &mut H) where
H: Hasher, Feeds a slice of this type into the given [Hasher]. Read more
impl<Idx> Clone for RangeTo<Idx> where
Idx: Clone, [src]
impl<Idx> Clone for RangeTo<Idx> where
Idx: Clone, fn clone(&self) -> RangeTo<Idx>[src]
fn clone(&self) -> RangeTo<Idx>Returns a copy of the value. Read more
fn clone_from(&mut self, source: &Self)[src]
fn clone_from(&mut self, source: &Self)Performs copy-assignment from source. Read more
impl<Idx> Debug for RangeTo<Idx> where
Idx: Debug, [src]
impl<Idx> Debug for RangeTo<Idx> where
Idx: Debug, fn fmt(&self, fmt: &mut Formatter) -> Result<(), Error>[src]
fn fmt(&self, fmt: &mut Formatter) -> Result<(), Error>Formats the value using the given formatter. Read more
impl IndexMut<RangeTo<usize>> for str1.3.0[src]
impl IndexMut<RangeTo<usize>> for strImplements mutable substring slicing with syntax &mut self[.. end].
Returns a mutable slice of the string from the beginning to byte offset
end.
Equivalent to &mut self[0 .. end].
fn index_mut(&mut self, index: RangeTo<usize>) -> &mut str[src]
fn index_mut(&mut self, index: RangeTo<usize>) -> &mut strPerforms the mutable indexing (container[index]) operation.
impl Index<RangeTo<usize>> for str[src]
impl Index<RangeTo<usize>> for strImplements substring slicing with syntax &self[.. end].
Returns a slice of the string from the beginning to byte offset
end.
Equivalent to &self[0 .. end].
type Output = str
The returned type after indexing.
fn index(&self, index: RangeTo<usize>) -> &str[src]
fn index(&self, index: RangeTo<usize>) -> &strPerforms the indexing (container[index]) operation.
impl<Idx> Eq for RangeTo<Idx> where
Idx: Eq, [src]
impl<Idx> Eq for RangeTo<Idx> where
Idx: Eq, impl<T> SliceIndex<[T]> for RangeTo<usize>1.15.0[src]
impl<T> SliceIndex<[T]> for RangeTo<usize>type Output = [T]
The output type returned by methods.
fn get(self, slice: &[T]) -> Option<&[T]>[src]
fn get(self, slice: &[T]) -> Option<&[T]>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]
fn get_mut(self, slice: &mut [T]) -> Option<&mut [T]>slice_index_methods)Returns a mutable reference to the output at this location, if in bounds. Read more
unsafe fn get_unchecked(self, slice: &[T]) -> &[T][src]
unsafe fn get_unchecked(self, slice: &[T]) -> &[T]slice_index_methods)Returns a shared reference to the output at this location, without performing any bounds checking. Read more
unsafe fn get_unchecked_mut(self, slice: &mut [T]) -> &mut [T][src]
unsafe fn get_unchecked_mut(self, slice: &mut [T]) -> &mut [T]slice_index_methods)Returns a mutable reference to the output at this location, without performing any bounds checking. Read more
fn index(self, slice: &[T]) -> &[T][src]
fn index(self, slice: &[T]) -> &[T]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]
fn index_mut(self, slice: &mut [T]) -> &mut [T]slice_index_methods)Returns a mutable reference to the output at this location, panicking if out of bounds. Read more
impl SliceIndex<str> for RangeTo<usize>1.20.0[src]
impl SliceIndex<str> for RangeTo<usize>type Output = str
The output type returned by methods.
fn get(
self,
slice: &str
) -> Option<&<RangeTo<usize> as SliceIndex<str>>::Output>[src]
fn get(
self,
slice: &str
) -> Option<&<RangeTo<usize> as SliceIndex<str>>::Output>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 <RangeTo<usize> as SliceIndex<str>>::Output>[src]
fn get_mut(
self,
slice: &mut str
) -> Option<&mut <RangeTo<usize> as SliceIndex<str>>::Output>slice_index_methods)Returns a mutable reference to the output at this location, if in bounds. Read more
unsafe fn get_unchecked(
self,
slice: &str
) -> &<RangeTo<usize> as SliceIndex<str>>::Output[src]
unsafe fn get_unchecked(
self,
slice: &str
) -> &<RangeTo<usize> as SliceIndex<str>>::Outputslice_index_methods)Returns a shared reference to the output at this location, without performing any bounds checking. Read more
unsafe fn get_unchecked_mut(
self,
slice: &mut str
) -> &mut <RangeTo<usize> as SliceIndex<str>>::Output[src]
unsafe fn get_unchecked_mut(
self,
slice: &mut str
) -> &mut <RangeTo<usize> as SliceIndex<str>>::Outputslice_index_methods)Returns a mutable reference to the output at this location, without performing any bounds checking. Read more
fn index(self, slice: &str) -> &<RangeTo<usize> as SliceIndex<str>>::Output[src]
fn index(self, slice: &str) -> &<RangeTo<usize> as SliceIndex<str>>::Outputslice_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 <RangeTo<usize> as SliceIndex<str>>::Output[src]
fn index_mut(
self,
slice: &mut str
) -> &mut <RangeTo<usize> as SliceIndex<str>>::Outputslice_index_methods)Returns a mutable reference to the output at this location, panicking if out of bounds. Read more
impl<Idx> PartialEq<RangeTo<Idx>> for RangeTo<Idx> where
Idx: PartialEq<Idx>, [src]
impl<Idx> PartialEq<RangeTo<Idx>> for RangeTo<Idx> where
Idx: PartialEq<Idx>, fn eq(&self, other: &RangeTo<Idx>) -> bool[src]
fn eq(&self, other: &RangeTo<Idx>) -> boolThis method tests for self and other values to be equal, and is used by ==. Read more
fn ne(&self, other: &RangeTo<Idx>) -> bool[src]
fn ne(&self, other: &RangeTo<Idx>) -> boolThis method tests for !=.
impl<Idx> Copy for RangeTo<Idx> where
Idx: Copy, [src]
impl<Idx> Copy for RangeTo<Idx> where
Idx: Copy, impl Index<RangeTo<usize>> for String[src]
impl Index<RangeTo<usize>> for Stringtype Output = str
The returned type after indexing.
fn index(&self, index: RangeTo<usize>) -> &str[src]
fn index(&self, index: RangeTo<usize>) -> &strPerforms the indexing (container[index]) operation.
impl IndexMut<RangeTo<usize>> for String1.3.0[src]
impl IndexMut<RangeTo<usize>> for String