Struct Metadata 

pub struct Metadata { /* private fields */ }

Ordered metadata container using Vec<(String, String)> for deterministic ordering (required for FATE test parity). Case-insensitive key lookup.

Implementations

impl Metadata

pub fn new() -> Self

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

Set a metadata key-value pair. If the key already exists (case-insensitive), the existing value is replaced. Otherwise, the pair is appended.

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

Get the value for a key (case-insensitive).

pub fn remove(&mut self, key: &str) -> Option<String>

Remove a key (case-insensitive). Returns the removed value if found.

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

Iterate over all entries in insertion order.

pub fn len(&self) -> usize

Number of entries.

pub fn is_empty(&self) -> bool

Returns true if empty.

Trait Implementations

impl Clone for Metadata

fn clone(&self) -> Metadata

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Metadata

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

Formats the value using the given formatter.

impl Default for Metadata

fn default() -> Metadata

Returns the “default value” for a type.