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FixedLenNode

tiny_trie::fixed_len_nibble_trie

Struct FixedLenNode

pub struct FixedLenNode<PTR: TrieIndex> {
    pub children: [PTR; 16],
    pub prefix_len: u16,
    pub leaf_mask: u16,
    pub leaf: PTR,
    pub flags: u8,
}

Expand description

A single node in the fixed-length nibble trie arena.

Generic over PTR (pointer/index type for children and arena references). Unlike Node, there is no LEN parameter (prefix_len is always u16) and no offset field (computed from leaf * max_len).

Layout with PTR=u16: 40 bytes (saves 8 vs NibbleTrie’s 48). Layout with PTR=u32: 76 bytes (saves 4 vs NibbleTrie’s 80).

Fields§

§children: [PTR; 16]§prefix_len: u16§leaf_mask: u16§leaf: PTR§flags: u8

Implementations§

impl<PTR: TrieIndex> FixedLenNode<PTR>

pub fn is_terminal(&self) -> bool

pub fn is_leaf(&self, nib: usize) -> bool

pub fn children_mask(&self) -> u16

Compute a 16-bit mask where bit N is set if children[N] is occupied (either leaf or internal — not the empty sentinel).

Trait Implementations§

impl<PTR: Clone + TrieIndex> Clone for FixedLenNode<PTR>

fn clone(&self) -> FixedLenNode<PTR>

Returns a duplicate of the value. Read more

1.0.0 (const: unstable) · Source§

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

Performs copy-assignment from source. Read more

impl<PTR: Copy + TrieIndex> Copy for FixedLenNode<PTR>

impl<PTR: TrieIndex> Debug for FixedLenNode<PTR>

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

Formats the value using the given formatter. Read more

Auto Trait Implementations§

impl<PTR> Freeze for FixedLenNode<PTR>
where PTR: Freeze,

impl<PTR> RefUnwindSafe for FixedLenNode<PTR>
where PTR: RefUnwindSafe,

impl<PTR> Send for FixedLenNode<PTR>
where PTR: Send,

impl<PTR> Sync for FixedLenNode<PTR>
where PTR: Sync,

impl<PTR> Unpin for FixedLenNode<PTR>
where PTR: Unpin,

impl<PTR> UnsafeUnpin for FixedLenNode<PTR>
where PTR: UnsafeUnpin,

impl<PTR> UnwindSafe for FixedLenNode<PTR>
where PTR: UnwindSafe,

Blanket Implementations§

impl<T> Any for T
where T: 'static + ?Sized,

fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

impl<T> Borrow<T> for T
where T: ?Sized,

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

impl<T> BorrowMut<T> for T
where T: ?Sized,

fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more

impl<T> CloneToUninit for T
where T: Clone,

unsafe fn clone_to_uninit(&self, dest: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit)

Performs copy-assignment from self to dest. Read more

impl<T> From<T> for T

fn from(t: T) -> T

Returns the argument unchanged.

impl<T, U> Into<U> for T
where U: From<T>,

fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

impl<T> ToOwned for T
where T: Clone,

type Owned = T

The resulting type after obtaining ownership.

fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more

fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more

impl<T, U> TryFrom<U> for T
where U: Into<T>,

type Error = Infallible

The type returned in the event of a conversion error.

fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.

impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.