pub struct Position(_);

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impl Position

pub fn level(self) -> u32

What level is this node in the tree, 0 if the node is a leaf, 1 if the level is one above a leaf, etc.

pub fn is_leaf(self) -> bool

pub fn from_level_and_pos(level: u32, pos: u64) -> Position

pos count start from 0 on each level

pub fn from_inorder_index(index: u64) -> Position

pub fn to_inorder_index(self) -> u64

pub fn from_postorder_index(index: u64) -> Result<Position, Error>

pub fn to_postorder_index(self) -> u64

pub fn parent(self) -> Position

What is the parent of this node?

pub fn left_child(self) -> Position

What is the left node of this node? Will overflow if the node is a leaf

pub fn right_child(self) -> Position

What is the right node of this node? Will overflow if the node is a leaf

pub fn is_left_child(self) -> bool

Whether this position is a left child of its parent. The observation is that, after stripping out all right-most 1 bits, a left child will have a bit pattern of xxx00(11..), while a right child will be represented by xxx10(11..)

pub fn is_right_child(self) -> bool

pub fn from_leaf_index(leaf_index: u64) -> Position

pub fn sibling(self) -> Position

This method takes in a node position and return its sibling position

The observation is that, after stripping out the right-most common bits, two sibling nodes flip the the next right-most bits with each other. To find out the right-most common bits, first remove all the right-most ones because they are corresponding to level’s indicator. Then remove next zero right after.

pub fn root_from_leaf_index(leaf_index: u64) -> Position

This method calculates the index of the smallest root which contains this leaf. Observe that, the root position is composed by a “height” number of ones

For example

    0010010(node)
    0011111(smearing)
    -------
    0001111(root)

pub fn root_from_leaf_count(leaf_count: u64) -> Position

pub fn root_level_from_leaf_count(leaf_count: u64) -> u32

pub fn right_most_child(self) -> Position

Given a node, find its right most child in its subtree. Right most child is a Position, could be itself, at level 0

pub fn left_most_child(self) -> Position

Given a node, find its left most child in its subtree Left most child is a node, could be itself, at level 0

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impl Position

pub fn is_freezable(self, leaf_index: u64) -> bool

pub fn is_placeholder(self, leaf_index: u64) -> bool

pub fn iter_ancestor(self) -> AncestorIterator

Creates an AncestorIterator using this position.

pub fn iter_ancestor_sibling(self) -> AncestorSiblingIterator

Creates an AncestorSiblingIterator using this position.

Trait Implementations§

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impl Clone for Position

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fn clone(&self) -> Position

Returns a copy of the value. Read more
1.0.0 · source§

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

Performs copy-assignment from source. Read more
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impl Debug for Position

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

Formats the value using the given formatter. Read more
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impl Display for Position

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

Formats the value using the given formatter. Read more
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impl Hash for Position

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

Feeds this value into the given Hasher. Read more
1.3.0 · source§

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

Feeds a slice of this type into the given Hasher. Read more
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impl Ord for Position

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

This method returns an Ordering between self and other. Read more
1.21.0 · source§

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

Compares and returns the maximum of two values. Read more
1.21.0 · source§

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

Compares and returns the minimum of two values. Read more
1.50.0 · source§

fn clamp(self, min: Self, max: Self) -> Selfwhere Self: Sized + PartialOrd<Self>,

Restrict a value to a certain interval. Read more
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impl PartialEq<Position> for Position

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

This method tests for self and other values to be equal, and is used by ==.
1.0.0 · source§

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

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl PartialOrd<Position> for Position

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

This method returns an ordering between self and other values if one exists. Read more
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fn lt(&self, other: &Rhs) -> bool

This method tests less than (for self and other) and is used by the < operator. Read more
1.0.0 · source§

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

This method tests less than or equal to (for self and other) and is used by the <= operator. Read more
1.0.0 · source§

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

This method tests greater than (for self and other) and is used by the > operator. Read more
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fn ge(&self, other: &Rhs) -> bool

This method tests greater than or equal to (for self and other) and is used by the >= operator. Read more
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impl Copy for Position

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impl Eq for Position

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impl StructuralEq for Position

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impl StructuralPartialEq for Position

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

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for Twhere T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for Twhere T: ?Sized,

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

Mutably borrows from an owned value. Read more
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impl<T> CallHasher for Twhere T: Hash + ?Sized,

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fn get_hash<H, B>(value: &H, build_hasher: &B) -> u64where H: Hash + ?Sized, B: BuildHasher,

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impl<Q, K> Equivalent<K> for Qwhere Q: Eq + ?Sized, K: Borrow<Q> + ?Sized,

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fn equivalent(&self, key: &K) -> bool

Compare self to key and return true if they are equal.
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T> Instrument for T

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fn instrument(self, span: Span) -> Instrumented<Self>

Instruments this type with the provided Span, returning an Instrumented wrapper. Read more
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fn in_current_span(self) -> Instrumented<Self>

Instruments this type with the current Span, returning an Instrumented wrapper. Read more
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impl<T, U> Into<U> for Twhere U: From<T>,

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fn into(self) -> U

Calls U::from(self).

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

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impl<T> Same<T> for T

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type Output = T

Should always be Self
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impl<T> ToOwned for Twhere T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T> ToString for Twhere T: Display + ?Sized,

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default fn to_string(&self) -> String

Converts the given value to a String. Read more
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impl<T, U> TryFrom<U> for Twhere U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for Twhere U: TryFrom<T>,

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

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
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impl<V, T> VZip<V> for Twhere V: MultiLane<T>,

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fn vzip(self) -> V

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impl<T> WithSubscriber for T

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fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>where S: Into<Dispatch>,

Attaches the provided Subscriber to this type, returning a WithDispatch wrapper. Read more
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Attaches the current default Subscriber to this type, returning a WithDispatch wrapper. Read more