1.28.0[−][src]Trait alloc::slice::SliceIndex
A helper trait used for indexing operations.
Associated Types
Loading content...Required methods
fn get(self, slice: &T) -> Option<&Self::Output>
slice_index_methods)Returns a shared reference to the output at this location, if in bounds.
fn get_mut(self, slice: &mut T) -> Option<&mut Self::Output>
slice_index_methods)Returns a mutable reference to the output at this location, if in bounds.
unsafe fn get_unchecked(self, slice: &T) -> &Self::Output
slice_index_methods)Returns a shared reference to the output at this location, without performing any bounds checking. Calling this method with an out-of-bounds index is [undefined behavior] even if the resulting reference is not used. [undefined behavior]: ../../reference/behavior-considered-undefined.html
unsafe fn get_unchecked_mut(self, slice: &mut T) -> &mut Self::Output
slice_index_methods)Returns a mutable reference to the output at this location, without performing any bounds checking. Calling this method with an out-of-bounds index is [undefined behavior] even if the resulting reference is not used. [undefined behavior]: ../../reference/behavior-considered-undefined.html
fn index(self, slice: &T) -> &Self::Output
slice_index_methods)Returns a shared reference to the output at this location, panicking if out of bounds.
fn index_mut(self, slice: &mut T) -> &mut Self::Output
slice_index_methods)Returns a mutable reference to the output at this location, panicking if out of bounds.
Implementations on Foreign Types
impl SliceIndex<str> for Range<usize>[src]
Implements substring slicing with syntax &self[begin .. end] or &mut self[begin .. end].
Returns a slice of the given string from the byte range
[begin, 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 begin or end does not point to the starting byte offset of
a character (as defined by is_char_boundary), if begin > end, or if
end > len.
Examples
let s = "Löwe 老虎 Léopard"; assert_eq!(&s[0 .. 1], "L"); assert_eq!(&s[1 .. 9], "öwe 老"); // these will panic: // byte 2 lies within `ö`: // &s[2 ..3]; // byte 8 lies within `老` // &s[1 .. 8]; // byte 100 is outside the string // &s[3 .. 100];Run
type Output = str
fn get(self, slice: &str) -> Option<&<Range<usize> as SliceIndex<str>>::Output>[src]
fn get_mut(
self,
slice: &mut str
) -> Option<&mut <Range<usize> as SliceIndex<str>>::Output>[src]
self,
slice: &mut str
) -> Option<&mut <Range<usize> as SliceIndex<str>>::Output>
unsafe fn get_unchecked(
self,
slice: &str
) -> &<Range<usize> as SliceIndex<str>>::Output[src]
self,
slice: &str
) -> &<Range<usize> as SliceIndex<str>>::Output
unsafe fn get_unchecked_mut(
self,
slice: &mut str
) -> &mut <Range<usize> as SliceIndex<str>>::Output[src]
self,
slice: &mut str
) -> &mut <Range<usize> as SliceIndex<str>>::Output
fn index(self, slice: &str) -> &<Range<usize> as SliceIndex<str>>::Output[src]
fn index_mut(
self,
slice: &mut str
) -> &mut <Range<usize> as SliceIndex<str>>::Output[src]
self,
slice: &mut str
) -> &mut <Range<usize> as SliceIndex<str>>::Output
impl SliceIndex<str> for RangeToInclusive<usize>[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 + 1], except if end has the maximum
value for usize.
This operation is O(1).
Panics
Panics if end does not point to the ending byte offset of a character
(end + 1 is either a starting byte offset as defined by
is_char_boundary, or equal to len), or if end >= len.
type Output = str
fn get(
self,
slice: &str
) -> Option<&<RangeToInclusive<usize> as SliceIndex<str>>::Output>[src]
self,
slice: &str
) -> Option<&<RangeToInclusive<usize> as SliceIndex<str>>::Output>
fn get_mut(
self,
slice: &mut str
) -> Option<&mut <RangeToInclusive<usize> as SliceIndex<str>>::Output>[src]
self,
slice: &mut str
) -> Option<&mut <RangeToInclusive<usize> as SliceIndex<str>>::Output>
unsafe fn get_unchecked(
self,
slice: &str
) -> &<RangeToInclusive<usize> as SliceIndex<str>>::Output[src]
self,
slice: &str
) -> &<RangeToInclusive<usize> as SliceIndex<str>>::Output
unsafe fn get_unchecked_mut(
self,
slice: &mut str
) -> &mut <RangeToInclusive<usize> as SliceIndex<str>>::Output[src]
self,
slice: &mut str
) -> &mut <RangeToInclusive<usize> as SliceIndex<str>>::Output
fn index(
self,
slice: &str
) -> &<RangeToInclusive<usize> as SliceIndex<str>>::Output[src]
self,
slice: &str
) -> &<RangeToInclusive<usize> as SliceIndex<str>>::Output
fn index_mut(
self,
slice: &mut str
) -> &mut <RangeToInclusive<usize> as SliceIndex<str>>::Output[src]
self,
slice: &mut str
) -> &mut <RangeToInclusive<usize> as SliceIndex<str>>::Output
impl<T> SliceIndex<[T]> for RangeToInclusive<usize>[src]
type Output = [T]
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: &[T]) -> &[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<T> SliceIndex<[T]> for RangeInclusive<usize>[src]
type Output = [T]
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: &[T]) -> &[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 RangeFrom<usize>[src]
Implements substring slicing with syntax &self[begin ..] or &mut self[begin ..].
Returns a slice of the given string from the byte range [begin,
len). Equivalent to &self[begin .. len] or &mut self[begin .. len].
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 begin does not point to the starting byte offset of
a character (as defined by is_char_boundary), or if begin >= len.
type Output = str
fn get(
self,
slice: &str
) -> Option<&<RangeFrom<usize> as SliceIndex<str>>::Output>[src]
self,
slice: &str
) -> Option<&<RangeFrom<usize> as SliceIndex<str>>::Output>
fn get_mut(
self,
slice: &mut str
) -> Option<&mut <RangeFrom<usize> as SliceIndex<str>>::Output>[src]
self,
slice: &mut str
) -> Option<&mut <RangeFrom<usize> as SliceIndex<str>>::Output>
unsafe fn get_unchecked(
self,
slice: &str
) -> &<RangeFrom<usize> as SliceIndex<str>>::Output[src]
self,
slice: &str
) -> &<RangeFrom<usize> as SliceIndex<str>>::Output
unsafe fn get_unchecked_mut(
self,
slice: &mut str
) -> &mut <RangeFrom<usize> as SliceIndex<str>>::Output[src]
self,
slice: &mut str
) -> &mut <RangeFrom<usize> as SliceIndex<str>>::Output
fn index(self, slice: &str) -> &<RangeFrom<usize> as SliceIndex<str>>::Output[src]
fn index_mut(
self,
slice: &mut str
) -> &mut <RangeFrom<usize> as SliceIndex<str>>::Output[src]
self,
slice: &mut str
) -> &mut <RangeFrom<usize> as SliceIndex<str>>::Output
impl<T> SliceIndex<[T]> for RangeFull[src]
type Output = [T]
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: &[T]) -> &[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 RangeInclusive<usize>[src]
Implements substring slicing with syntax &self[begin ..= end] or &mut self[begin ..= end].
Returns a slice of the given string from the byte range
[begin, end]. Equivalent to &self [begin .. end + 1] or &mut self[begin .. end + 1], except if end has the maximum value for
usize.
This operation is O(1).
Panics
Panics if begin does not point to the starting byte offset of
a character (as defined by is_char_boundary), if end does not point
to the ending byte offset of a character (end + 1 is either a starting
byte offset or equal to len), if begin > end, or if end >= len.
type Output = str
fn get(
self,
slice: &str
) -> Option<&<RangeInclusive<usize> as SliceIndex<str>>::Output>[src]
self,
slice: &str
) -> Option<&<RangeInclusive<usize> as SliceIndex<str>>::Output>
fn get_mut(
self,
slice: &mut str
) -> Option<&mut <RangeInclusive<usize> as SliceIndex<str>>::Output>[src]
self,
slice: &mut str
) -> Option<&mut <RangeInclusive<usize> as SliceIndex<str>>::Output>
unsafe fn get_unchecked(
self,
slice: &str
) -> &<RangeInclusive<usize> as SliceIndex<str>>::Output[src]
self,
slice: &str
) -> &<RangeInclusive<usize> as SliceIndex<str>>::Output
unsafe fn get_unchecked_mut(
self,
slice: &mut str
) -> &mut <RangeInclusive<usize> as SliceIndex<str>>::Output[src]
self,
slice: &mut str
) -> &mut <RangeInclusive<usize> as SliceIndex<str>>::Output
fn index(
self,
slice: &str
) -> &<RangeInclusive<usize> as SliceIndex<str>>::Output[src]
self,
slice: &str
) -> &<RangeInclusive<usize> as SliceIndex<str>>::Output
fn index_mut(
self,
slice: &mut str
) -> &mut <RangeInclusive<usize> as SliceIndex<str>>::Output[src]
self,
slice: &mut str
) -> &mut <RangeInclusive<usize> as SliceIndex<str>>::Output
impl SliceIndex<str> for RangeTo<usize>[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
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: &str
) -> &<RangeTo<usize> as SliceIndex<str>>::Output[src]
self,
slice: &str
) -> &<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 SliceIndex<str> for RangeFull[src]
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
fn get(self, slice: &str) -> Option<&<RangeFull as SliceIndex<str>>::Output>[src]
fn get_mut(
self,
slice: &mut str
) -> Option<&mut <RangeFull as SliceIndex<str>>::Output>[src]
self,
slice: &mut str
) -> Option<&mut <RangeFull as SliceIndex<str>>::Output>
unsafe fn get_unchecked(
self,
slice: &str
) -> &<RangeFull as SliceIndex<str>>::Output[src]
self,
slice: &str
) -> &<RangeFull as SliceIndex<str>>::Output
unsafe fn get_unchecked_mut(
self,
slice: &mut str
) -> &mut <RangeFull as SliceIndex<str>>::Output[src]
self,
slice: &mut str
) -> &mut <RangeFull as SliceIndex<str>>::Output
fn index(self, slice: &str) -> &<RangeFull as SliceIndex<str>>::Output[src]
fn index_mut(
self,
slice: &mut str
) -> &mut <RangeFull as SliceIndex<str>>::Output[src]
self,
slice: &mut str
) -> &mut <RangeFull as SliceIndex<str>>::Output