Enum MetaSource 

pub enum MetaSource<'a> {
    Explicit(&'a ValueMeta<'a>),
    Owned(ValueMeta<'a>),
    FromEvents,
}

Specifies where metadata should come from during deserialization.

Variants

Explicit(&'a ValueMeta<'a>)

Use explicit metadata from an outer context (borrowed).

Use cases:

• Consumed a VariantTag: We consumed @tag before a value and need to pass the tag name (and doc if present) to the inner value so metadata containers can capture it.
• Recursive through wrappers: Going through proxies, transparent converts, pointers, begin_inner - same logical value, pass through same metadata.
• Merged metadata: When we’ve built up metadata from multiple sources (e.g., tag span + value span combined) and need to pass the merged result.

Owned(ValueMeta<'a>)

Use explicit metadata that was constructed locally (owned).

Use cases:

• Struct field with attached metadata: The field key had doc comments or other metadata that should apply to the field value.

FromEvents

Get fresh metadata from the events being parsed.

Use this when deserializing a new value that has no pre-consumed context: list items, map keys/values, struct fields without special metadata, etc.

Trait Implementations

impl<'a> Clone for MetaSource<'a>

fn clone(&self) -> MetaSource<'a>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<'a> Debug for MetaSource<'a>

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

Formats the value using the given formatter.

impl<'a> Default for MetaSource<'a>

fn default() -> MetaSource<'a>

Returns the “default value” for a type.

impl<'a> From<&'a ValueMeta<'a>> for MetaSource<'a>

fn from(meta: &'a ValueMeta<'a>) -> Self

Converts to this type from the input type.

impl<'a> From<ValueMeta<'a>> for MetaSource<'a>

fn from(meta: ValueMeta<'a>) -> Self

Converts to this type from the input type.