Struct core::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: PartialOrd<Idx>> RangeTo<Idx>[src]
pub fn contains(&self, item: Idx) -> bool[src]
🔬 This is a nightly-only experimental API. (range_contains #32311)
recently added as per RFC
Trait Implementations
impl<Idx: Copy> Copy for RangeTo<Idx>[src]
impl<Idx: Clone> Clone for RangeTo<Idx>[src]
fn clone(&self) -> RangeTo<Idx>[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<Idx: PartialEq> PartialEq for RangeTo<Idx>[src]
fn eq(&self, __arg_0: &RangeTo<Idx>) -> bool[src]
This method tests for self and other values to be equal, and is used by ==. Read more
fn ne(&self, __arg_0: &RangeTo<Idx>) -> bool[src]
This method tests for !=.
impl<Idx: Eq> Eq for RangeTo<Idx>[src]
impl<Idx: Hash> Hash for RangeTo<Idx>[src]
fn hash<__HIdx: Hasher>(&self, __arg_0: &mut __HIdx)[src]
Feeds this value into the given [Hasher]. Read more
fn hash_slice<H: Hasher>(data: &[Self], state: &mut H) where
Self: Sized, 1.3.0[src]
Self: Sized,
Feeds a slice of this type into the given [Hasher]. Read more
impl<Idx: Debug> Debug for RangeTo<Idx>[src]
fn fmt(&self, fmt: &mut Formatter) -> Result[src]
Formats the value using the given formatter. Read more
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]
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]
Returns a mutable reference to the output at this location, if in bounds. Read more
unsafe fn get_unchecked(self, slice: &[T]) -> &[T][src]
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]
Returns a mutable reference to the output at this location, without performing any bounds checking. Read more
fn index(self, slice: &[T]) -> &[T][src]
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]
Returns a mutable reference to the output at this location, panicking if out of bounds. Read more
impl Index<RangeTo<usize>> for str[src]
Implements 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]
Performs the indexing (container[index]) operation.
impl IndexMut<RangeTo<usize>> for str1.3.0[src]
Implements 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]
Performs the mutable indexing (container[index]) operation.
impl SliceIndex<str> for RangeTo<usize>1.20.0[src]
type Output = str
The output type returned by methods.
fn get(self, slice: &str) -> Option<&Self::Output>[src]
Returns a shared reference to the output at this location, if in bounds. Read more
fn get_mut(self, slice: &mut str) -> Option<&mut Self::Output>[src]
Returns a mutable reference to the output at this location, if in bounds. Read more
unsafe fn get_unchecked(self, slice: &str) -> &Self::Output[src]
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 Self::Output[src]
Returns a mutable reference to the output at this location, without performing any bounds checking. Read more
fn index(self, slice: &str) -> &Self::Output[src]
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 Self::Output[src]
Returns a mutable reference to the output at this location, panicking if out of bounds. Read more