pub struct Index { /* fields omitted */ }
An index (and generation) into an Arena
.
To get an Index
, insert an element into an Arena
, and the Index
for
that element will be returned.
use generational_arena::Arena;
let mut arena = Arena::new();
let idx = arena.insert(123);
assert_eq!(arena[idx], 123);
Create a new Index
from its raw parts.
The parts must have been returned from an earlier call to
into_raw_parts
.
Providing arbitrary values will lead to malformed indices and ultimately
panics.
Convert this Index
into its raw parts.
This niche method is useful for converting an Index
into another
identifier type. Usually, you should prefer a newtype wrapper around
Index
like pub struct MyIdentifier(Index);
. However, for external
types whose definition you can’t customize, but which you can construct
instances of, this method can be useful.
Formats the value using the given formatter. Read more
The returned type after indexing.
Performs the indexing (container[index]
) operation. Read more
Performs the mutable indexing (container[index]
) operation. Read more
#[must_use]
pub fn max(self, other: Self) -> Self
1.21.0[src]
Compares and returns the maximum of two values. Read more
#[must_use]
pub fn min(self, other: Self) -> Self
1.21.0[src]
Compares and returns the minimum of two values. Read more
#[must_use]
pub fn clamp(self, min: Self, max: Self) -> Self
1.50.0[src]
Restrict a value to a certain interval. Read more
This method tests for self
and other
values to be equal, and is used
by ==
. Read more
This method tests for !=
.
This method returns an ordering between self
and other
values if one exists. Read more
#[must_use]
pub fn lt(&self, other: &Rhs) -> bool
1.0.0[src]
This method tests less than (for self
and other
) and is used by the <
operator. Read more
#[must_use]
pub fn le(&self, other: &Rhs) -> bool
1.0.0[src]
This method tests less than or equal to (for self
and other
) and is used by the <=
operator. Read more
#[must_use]
pub fn gt(&self, other: &Rhs) -> bool
1.0.0[src]
This method tests greater than (for self
and other
) and is used by the >
operator. Read more
#[must_use]
pub fn ge(&self, other: &Rhs) -> bool
1.0.0[src]
This method tests greater than or equal to (for self
and other
) and is used by the >=
operator. Read more
impl<T> Any for T where
T: 'static + ?Sized,
[src]
Immutably borrows from an owned value. Read more
Mutably borrows from an owned value. Read more
impl<T, U> Into<U> for T where
U: From<T>,
[src]
The resulting type after obtaining ownership.
Creates owned data from borrowed data, usually by cloning. Read more
🔬 This is a nightly-only experimental API. (toowned_clone_into
)
recently added
Uses borrowed data to replace owned data, usually by cloning. Read more
impl<T, U> TryFrom<U> for T where
U: Into<T>,
[src]
The type returned in the event of a conversion error.
The type returned in the event of a conversion error.