Struct PreservedFields 

pub struct PreservedFields {
    pub fields: HashMap<String, Value>,
}

Container for preserving unknown fields during deserialization This enables forward compatibility - newer versions can be read by older code

Fields

fields: HashMap<String, Value>

Unknown fields stored as JSON values

Implementations

impl PreservedFields

pub fn new() -> Self

Create a new empty preserved fields container

pub fn add_field(&mut self, name: String, value: Value)

Add a preserved field

pub fn get_field(&self, name: &str) -> Option<&Value>

Get a preserved field

pub fn is_empty(&self) -> bool

Check if there are any preserved fields

pub fn len(&self) -> usize

Get the number of preserved fields

Trait Implementations

impl Clone for PreservedFields

fn clone(&self) -> PreservedFields

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for PreservedFields

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

Formats the value using the given formatter.

impl Default for PreservedFields

fn default() -> PreservedFields

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for PreservedFields

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for PreservedFields

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

where __S: Serializer,

Serialize this value into the given Serde serializer.