Struct IndexedID 

pub struct IndexedID<E, P> {
    pub indexed: GenIndex,
    /* private fields */
}

Index-backed ID storing a GenIndex (real index + generation).

IndexedID is a compact representation suitable for serialization, hashing, and comparisons. It stores the GenIndex produced by the allocator and keeps a PhantomData to tie the ID to the element and policy types.

中文说明：索引型 ID，包含 GenIndex 用于表达槽位与世代信息，适合哈希、比较与持久化场景。

Fields

indexed: GenIndex

The underlying GenIndex representing the indexed entity.

Implementations

impl<E, P: IAllocPolicy> IndexedID<E, P>

pub fn next_to_alloc(alloc: &EntityAlloc<E, P>) -> Self

Create an IndexedID that represents the next index the allocator would allocate.

注意：这只是对分配器内部 next_index 的封装，实际分配仍需调用分配接口。

pub fn get_generation(self) -> u16

Return the generation stored in this IndexedID.

返回索引中的世代号（用于检测过期的引用）。

pub fn get_order(self) -> usize

Return the real-order/index portion of this IndexedID.

返回索引的真实位置，用于定位在分配器内部的槽位。

Trait Implementations

impl<E, P> Clone for IndexedID<E, P>

fn clone(&self) -> Self

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<E, P> Debug for IndexedID<E, P>

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<E, P> From<GenIndex> for IndexedID<E, P>

fn from(indexed: GenIndex) -> Self

Converts to this type from the input type.

impl<E, P> Hash for IndexedID<E, P>

fn hash<H: Hasher>(&self, state: &mut H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl<E, P: IAllocPolicy> IEntityAllocID<E, P> for IndexedID<E, P>

fn from_ptr(alloc: &EntityAlloc<E, P>, ptr: PtrID<E, P>) -> Option<Self>

Create an ID from a pointer-backed ID, validating generation/index.

fn from_index(_: &EntityAlloc<E, P>, indexed: IndexedID<E, P>) -> Option<Self>

Create an ID from an index-backed ID, validating generation/index.

fn try_deref(self, alloc: &EntityAlloc<E, P>) -> Option<&E>

Try to dereference the entity this ID points to, returning None if invalid.

fn try_deref_mut(self, alloc: &mut EntityAlloc<E, P>) -> Option<&mut E>

Try to mutably dereference the entity this ID points to, returning None if invalid.

fn to_index(self, _: &EntityAlloc<E, P>) -> Option<IndexedID<E, P>>

Convert this ID to an index-backed ID, validating generation/index.

fn to_ptr(self, alloc: &EntityAlloc<E, P>) -> Option<PtrID<E, P>>

Convert this ID to a pointer-backed ID, validating generation/index.

fn allocate_from(alloc: &EntityAlloc<E, P>, val: E) -> Self

Allocate a new entity in the given allocator and return its ID. NOTE that MTB::Entity library is ID-driven; allocation and deallocation must be done through IDs.

fn free(self, alloc: &mut EntityAlloc<E, P>) -> Option<E>

Free the referenced entity and return its owned value if successful.

fn deref(self, alloc: &EntityAlloc<E, P>) -> &E

Directly dereference the entity this ID points to, panicking if invalid.

fn deref_mut(self, alloc: &mut EntityAlloc<E, P>) -> &mut E

Directly mutably dereference the entity this ID points to, panicking if invalid.

impl<E, P: IAllocPolicy> IPoliciedID for IndexedID<E, P>

type ObjectT = E

The object type this ID references.

type PolicyT = P

The allocation policy this ID is associated with.

type BackID = IndexedID<E, P>

The backend ID type that implements the actual logic.

fn from_backend(ptr: Self::BackID) -> Self

Create this ID from its backend representation.

fn into_backend(self) -> Self::BackID

Convert this ID into its backend representation.

fn try_deref_alloc(self, alloc: &IDBoundAlloc<Self>) -> Option<&Self::ObjectT>

Try to dereference the object this ID points to, returning None if invalid.

fn try_deref_alloc_mut( self, alloc: &mut IDBoundAlloc<Self>, ) -> Option<&mut Self::ObjectT>

Try to mutably dereference the object this ID points to, returning None if invalid.

fn deref_alloc(self, alloc: &IDBoundAlloc<Self>) -> &Self::ObjectT

Dereference the object this ID points to, panicking if invalid.

fn deref_alloc_mut(self, alloc: &mut IDBoundAlloc<Self>) -> &mut Self::ObjectT

Mutably dereference the object this ID points to, panicking if invalid.

impl<E, P> LowerHex for IndexedID<E, P>

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<E, P> Ord for IndexedID<E, P>

fn cmp(&self, other: &Self) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl<E, P> PartialEq for IndexedID<E, P>

fn eq(&self, other: &Self) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl<E, P> PartialOrd for IndexedID<E, P>

fn partial_cmp(&self, other: &Self) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

fn lt(&self, other: &Rhs) -> bool

Tests less than (for self and other) and is used by the < operator.

fn le(&self, other: &Rhs) -> bool

Tests less than or equal to (for self and other) and is used by the <= operator.

fn gt(&self, other: &Rhs) -> bool

Tests greater than (for self and other) and is used by the > operator.

fn ge(&self, other: &Rhs) -> bool

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl<E, P> Pointer for IndexedID<E, P>

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<E, P> UpperHex for IndexedID<E, P>

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<E, P> Copy for IndexedID<E, P>

impl<E, P> Eq for IndexedID<E, P>