Struct Attributes 

pub struct Attributes<SS: StringStorage> { /* private fields */ }

Container for attributes using a specific storage strategy.

Attributes is a key-value store where keys are strings and values are AttributeValue instances. Each object owns its attributes directly.

Implementations

impl<SS: StringStorage> Attributes<SS>

pub fn new() -> Self

Creates a new, empty attributes container.

pub fn with_capacity(capacity: usize) -> Self

Creates a new attributes container with space for at least capacity entries.

pub fn get(&self, key: &str) -> Option<&AttributeValue<SS>>

Retrieves a reference to the attribute value associated with the given key.

pub fn get_mut(&mut self, key: &str) -> Option<&mut AttributeValue<SS>>

Retrieves a mutable reference to the attribute value associated with the given key.

pub fn insert( &mut self, key: SS::String, value: AttributeValue<SS>, ) -> Option<AttributeValue<SS>>

Inserts an attribute value with the specified key.

If the key already existed, returns the previous value.

pub fn remove(&mut self, key: &str) -> Option<AttributeValue<SS>>

Removes an attribute with the specified key.

pub fn len(&self) -> usize

Returns the number of attributes in the container.

pub fn is_empty(&self) -> bool

Checks if the attributes container is empty.

pub fn iter(&self) -> impl Iterator<Item = (&SS::String, &AttributeValue<SS>)>

Returns an iterator over the attributes’ keys and values.

pub fn iter_mut( &mut self, ) -> impl Iterator<Item = (&SS::String, &mut AttributeValue<SS>)>

Returns a mutable iterator over the attributes’ keys and values.

pub fn keys(&self) -> impl Iterator<Item = &SS::String>

Returns an iterator over the attribute keys.

pub fn values(&self) -> impl Iterator<Item = &AttributeValue<SS>>

Returns an iterator over the attribute values.

pub fn clear(&mut self)

Clears the attributes container.

pub fn contains_key(&self, key: &str) -> bool

Checks if the attributes container contains a key.

Trait Implementations

impl<SS: Clone + StringStorage> Clone for Attributes<SS>

where SS::String: Clone,

fn clone(&self) -> Attributes<SS>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<SS: Debug + StringStorage> Debug for Attributes<SS>

where SS::String: Debug,

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

Formats the value using the given formatter.

impl<SS: StringStorage> Default for Attributes<SS>

fn default() -> Self

Returns the “default value” for a type.

impl<SS: StringStorage> Display for Attributes<SS>

where SS::String: Display + Eq + Hash,

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

Formats the value using the given formatter.

impl<SS: StringStorage> From<HashMap<<SS as StringStorage>::String, AttributeValue<SS>>> for Attributes<SS>

fn from(values: HashMap<SS::String, AttributeValue<SS>>) -> Self

Converts to this type from the input type.

impl<SS: PartialEq + StringStorage> PartialEq for Attributes<SS>

where SS::String: PartialEq,

fn eq(&self, other: &Attributes<SS>) -> 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<SS: StringStorage> StructuralPartialEq for Attributes<SS>