Enum PrimitiveOrElement 

pub enum PrimitiveOrElement<P, E> {
    Element(E),
    Primitive(P),
}

Accepts either JSON primitive values or XML element structures with metadata.

JSON Format: Primitive values come through as scalars, metadata merged from _field by macro.

• "birthDate": "1970-03-30" → Primitive("1970-03-30") (String directly)
• Metadata in _field is handled separately by the generated macro code

XML Format: All primitives are elements with inline metadata, no _field exists.

• <birthDate value="1970-03-30"/> → Element(Element { value: Some(...), id: None, ... })
• <birthDate id="x" value="..."> → Element(Element { value, id, ... })
• <birthDate id="x" value="..."><extension>...</extension></birthDate> → Element with full metadata

The custom Deserialize impl mirrors the old #[serde(untagged)] behavior without buffering:

• JSON scalars map to the Primitive variant (directly deserialized into the primitive type).
• XML element structures (objects with value, id, extension, …) map to the Element variant. It avoids serde’s internal Content buffering while preserving semantics crucial for primitives with metadata.

Type Parameters

• P: Primitive type (the final deserialized type, e.g. String, i32, bool)
• E: Element type (struct containing value and metadata fields)

Variants

Element(E)

Primitive(P)

Trait Implementations

impl<P: Clone, E: Clone> Clone for PrimitiveOrElement<P, E>

fn clone(&self) -> PrimitiveOrElement<P, E>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<P: Debug, E: Debug> Debug for PrimitiveOrElement<P, E>

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

Formats the value using the given formatter.

impl<'de, P, E> Deserialize<'de> for PrimitiveOrElement<P, E>

where P: Deserialize<'de>, E: Deserialize<'de>,

Available on crate feature xml only.

fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>

where D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl<P: PartialEq, E: PartialEq> PartialEq for PrimitiveOrElement<P, E>

fn eq(&self, other: &PrimitiveOrElement<P, E>) -> 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<P, E> StructuralPartialEq for PrimitiveOrElement<P, E>