1.28.0[−][src]Trait core::slice::SliceIndex
A helper trait used for indexing operations.
Associated Types
Loading content...Required methods
fn get(self, slice: &T) -> Option<&Self::Output>
Returns a shared reference to the output at this location, if in bounds.
fn get_mut(self, slice: &mut T) -> Option<&mut Self::Output>
Returns a mutable reference to the output at this location, if in bounds.
unsafe fn get_unchecked(self, slice: &T) -> &Self::Output
Returns a shared reference to the output at this location, without performing any bounds checking.
unsafe fn get_unchecked_mut(self, slice: &mut T) -> &mut Self::Output
Returns a mutable reference to the output at this location, without performing any bounds checking.
fn index(self, slice: &T) -> &Self::Output
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
Returns a mutable reference to the output at this location, panicking if out of bounds.
Implementors
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<&Self::Output>
[src]
fn get_mut(self, slice: &mut str) -> Option<&mut Self::Output>
[src]
unsafe fn get_unchecked(self, slice: &str) -> &Self::Output
[src]
unsafe fn get_unchecked_mut(self, slice: &mut str) -> &mut Self::Output
[src]
fn index(self, slice: &str) -> &Self::Output
[src]
fn index_mut(self, slice: &mut str) -> &mut Self::Output
[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<&Self::Output>
[src]
fn get_mut(self, slice: &mut str) -> Option<&mut Self::Output>
[src]
unsafe fn get_unchecked(self, slice: &str) -> &Self::Output
[src]
unsafe fn get_unchecked_mut(self, slice: &mut str) -> &mut Self::Output
[src]
fn index(self, slice: &str) -> &Self::Output
[src]
fn index_mut(self, slice: &mut str) -> &mut Self::Output
[src]
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<&Self::Output>
[src]
fn get_mut(self, slice: &mut str) -> Option<&mut Self::Output>
[src]
unsafe fn get_unchecked(self, slice: &str) -> &Self::Output
[src]
unsafe fn get_unchecked_mut(self, slice: &mut str) -> &mut Self::Output
[src]
fn index(self, slice: &str) -> &Self::Output
[src]
fn index_mut(self, slice: &mut str) -> &mut Self::Output
[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<&Self::Output>
[src]
fn get_mut(self, slice: &mut str) -> Option<&mut Self::Output>
[src]
unsafe fn get_unchecked(self, slice: &str) -> &Self::Output
[src]
unsafe fn get_unchecked_mut(self, slice: &mut str) -> &mut Self::Output
[src]
fn index(self, slice: &str) -> &Self::Output
[src]
fn index_mut(self, slice: &mut str) -> &mut Self::Output
[src]
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<&Self::Output>
[src]
fn get_mut(self, slice: &mut str) -> Option<&mut Self::Output>
[src]
unsafe fn get_unchecked(self, slice: &str) -> &Self::Output
[src]
unsafe fn get_unchecked_mut(self, slice: &mut str) -> &mut Self::Output
[src]
fn index(self, slice: &str) -> &Self::Output
[src]
fn index_mut(self, slice: &mut str) -> &mut Self::Output
[src]
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
.