Enum MetadataValue 

pub enum MetadataValue {
    U64(u64),
    I64(i64),
    F64(f64),
    URational(URational),
    SRational(SRational),
    Text(String),
    Bytes(Vec<u8>),
    Array(Vec<MetadataValue>),
}

A typed, format-agnostic metadata value.

Used by ImageMetadata::extra to represent any metadata tag that does not have a dedicated typed field. Every EXIF/TIFF/XMP/IPTC value type maps onto one of these variants, so the generic table can hold anything the library does not (yet) model without requiring a schema change.

Variants

U64(u64)

Unsigned integer (EXIF BYTE / SHORT / LONG widen losslessly into u64).

I64(i64)

Signed integer (EXIF SBYTE / SSHORT / SLONG).

F64(f64)

Floating point (EXIF FLOAT / DOUBLE).

URational(URational)

Unsigned rational (EXIF RATIONAL).

SRational(SRational)

Signed rational (EXIF SRATIONAL).

Text(String)

Text (EXIF ASCII, XMP/IPTC strings).

Bytes(Vec<u8>)

Opaque/undefined byte payload (EXIF UNDEFINED, MakerNote fragments).

Array(Vec<MetadataValue>)

Homogeneous or heterogeneous array of values (EXIF count > 1).

Trait Implementations

impl Clone for MetadataValue

fn clone(&self) -> MetadataValue

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for MetadataValue

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for MetadataValue

fn deserialize<__D>( __deserializer: __D, ) -> Result<MetadataValue, <__D as Deserializer<'de>>::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl PartialEq for MetadataValue

fn eq(&self, other: &MetadataValue) -> 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 Serialize for MetadataValue

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

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for MetadataValue