RangeFull in std::ops - Rust (original) (raw)
Struct RangeFull
1.0.0 · Source
pub struct RangeFull;Expand description
An unbounded range (..).
RangeFull is primarily used as a slicing index, its shorthand is ... It cannot serve as an Iterator because it doesn’t have a starting point.
§Examples
The .. syntax is a RangeFull:
assert_eq!(.., std::ops::RangeFull);It does not have an IntoIterator implementation, so you can’t use it in a for loop directly. This won’t compile:
Used as a slicing index, RangeFull produces the full array as a slice.
let arr = [0, 1, 2, 3, 4];
assert_eq!(arr[ .. ], [0, 1, 2, 3, 4]); // This is the `RangeFull`
assert_eq!(arr[ .. 3], [0, 1, 2 ]);
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 ]);The returned type after indexing.
Performs the indexing (container[index]) operation. Read more
The returned type after indexing.
Performs the indexing (container[index]) operation. Read more
The returned type after indexing.
Performs the indexing (container[index]) operation. Read more
The returned type after indexing.
Performs the indexing (container[index]) operation. Read more
🔬This is a nightly-only experimental API. (range_into_bounds #136903)
Convert this range into the start and end bounds. Returns (start_bound, end_bound). Read more
Tests for self and other values to be equal, and is used by ==.
Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
The output type returned by methods.
🔬This is a nightly-only experimental API. (slice_index_methods)
Returns a shared reference to the output at this location, if in bounds.
🔬This is a nightly-only experimental API. (slice_index_methods)
Returns a mutable reference to the output at this location, if in bounds.
🔬This is a nightly-only experimental API. (slice_index_methods)
Returns a pointer to the output at this location, without performing any bounds checking. Read more
🔬This is a nightly-only experimental API. (slice_index_methods)
Returns a mutable pointer to the output at this location, without performing any bounds checking. Read more
🔬This is a nightly-only experimental API. (slice_index_methods)
Returns a shared reference to the output at this location, panicking if out of bounds.
🔬This is a nightly-only experimental API. (slice_index_methods)
Returns a mutable reference to the output at this location, panicking if out of bounds.
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].
The output type returned by methods.
🔬This is a nightly-only experimental API. (slice_index_methods)
Returns a shared reference to the output at this location, if in bounds.
🔬This is a nightly-only experimental API. (slice_index_methods)
Returns a mutable reference to the output at this location, if in bounds.
🔬This is a nightly-only experimental API. (slice_index_methods)
Returns a pointer to the output at this location, without performing any bounds checking. Read more
🔬This is a nightly-only experimental API. (slice_index_methods)
Returns a mutable pointer to the output at this location, without performing any bounds checking. Read more
🔬This is a nightly-only experimental API. (slice_index_methods)
Returns a shared reference to the output at this location, panicking if out of bounds.
🔬This is a nightly-only experimental API. (slice_index_methods)
Returns a mutable reference to the output at this location, panicking if out of bounds.