Enum VirtualKey 

pub enum VirtualKey {
    Index(usize),
    Named(String),
}

Stable identity key for a virtual item.

Supports both numeric and string-based keys to allow custom key extractors that produce stable identities across item reordering. When items are reordered, their measured sizes follow the key rather than the index.

Variants

Index(usize)

A numeric key, typically derived from the item index.

Named(String)

A string-based key for custom identity strategies.

Trait Implementations

impl Clone for VirtualKey

fn clone(&self) -> VirtualKey

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for VirtualKey

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

Formats the value using the given formatter.

impl Default for VirtualKey

fn default() -> Self

Returns a default key of index zero.

Returns

• VirtualKey::Index(0): The default key.

impl Display for VirtualKey

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

Formats the key for display.

Parameters

• f: The formatter.

impl From<&str> for VirtualKey

fn from(name: &str) -> Self

Creates a key from a string slice.

Parameters

• name: The string slice key value.

impl From<String> for VirtualKey

fn from(name: String) -> Self

Creates a key from a string.

Parameters

• name: The string key value.

impl From<usize> for VirtualKey

fn from(index: usize) -> Self

Creates a key from a numeric index.

Parameters

• index: The numeric index value.

impl Hash for VirtualKey

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 PartialEq for VirtualKey

fn eq(&self, other: &VirtualKey) -> 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 Eq for VirtualKey

impl StructuralPartialEq for VirtualKey