Struct ExtensionsMap 

pub struct ExtensionsMap(/* private fields */);

A map of vendor-namespaced extension values.

Keys SHOULD use a reverse-DNS-style prefix (e.g. vendor.example/feature) to avoid collisions across implementations. The map preserves insertion order for stable canonicalization.

Implementations

impl ExtensionsMap

pub fn new() -> Self

Construct an empty extensions map.

pub fn is_empty(&self) -> bool

True if no extensions are set.

Callers embedding this map in a signed struct MUST wrap the field as Option<ExtensionsMap> with #[serde(default, skip_serializing_if = "Option::is_none")], NOT skip_serializing_if = "ExtensionsMap::is_empty" on a bare (non-Option) field — the latter conflates an absent extensions member with a present-but-empty "extensions":{}, which are different canonical bytes and therefore different signatures (RFC-AITP-0001 §5.4.1). See docs/jcs.md for the full rationale and the list of types that follow this pattern. This method exists for callers that only need to check emptiness directly, not as a skip_serializing_if target.

pub fn insert(&mut self, key: impl Into<String>, value: Value)

Insert a key/value pair.

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

Get a value by key.

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

Iterate over key/value pairs in canonical (sorted) order.

Trait Implementations

impl Clone for ExtensionsMap

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ExtensionsMap

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

Formats the value using the given formatter.

impl Default for ExtensionsMap

fn default() -> Self

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for ExtensionsMap

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Eq for ExtensionsMap

impl PartialEq for ExtensionsMap

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

Equality operator ==.

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

Inequality operator !=.

impl Serialize for ExtensionsMap

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for ExtensionsMap