Struct Metadata

pub struct Metadata { /* private fields */ }

Implementations

impl Metadata

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

pub fn insert<K, V>(&mut self, key: K, value: V)

where K: Into<String>, V: Into<Value>,

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

pub fn into_values(self) -> IntoValues<String, Value>

pub fn is_empty(&self) -> bool

Trait Implementations

impl Clone for Metadata

fn clone(&self) -> Metadata

Returns a copy 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.

impl<'de> Deserialize<'de> for Metadata

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

Deserialize this value from the given Serde deserializer.

impl<K, V> Extend<(K, V)> for Metadata

where K: Into<String>, V: Into<Value>,

fn extend<T: IntoIterator<Item = (K, V)>>(&mut self, iter: T)

Extends a collection with the contents of an iterator.

fn extend_one(&mut self, item: A)

🔬This is a nightly-only experimental API. (extend_one)

Extends a collection with exactly one element.

fn extend_reserve(&mut self, additional: usize)

🔬This is a nightly-only experimental API. (extend_one)

Reserves capacity in a collection for the given number of additional elements.

impl<'a, K, V> From<&'a [(K, V)]> for Metadata

where K: Into<String> + Clone, V: Into<Value> + Clone,

fn from(items: &'a [(K, V)]) -> Self

Converts to this type from the input type.

impl<K, V, const N: usize> From<[(K, V); N]> for Metadata

where K: Ord + Into<String>, V: Into<Value>,

fn from(arr: [(K, V); N]) -> Self

Converts to this type from the input type.

impl<K, V> From<(K, V)> for Metadata

where K: Into<String>, V: Into<Value>,

fn from(items: (K, V)) -> Self

Converts to this type from the input type.

impl<K, V> From<Vec<(K, V)>> for Metadata

where K: Into<String>, V: Into<Value>,

fn from(items: Vec<(K, V)>) -> Self

Converts to this type from the input type.

impl<'iter> IntoIterator for &'iter Metadata

type Item = (&'iter String, &'iter Value)

The type of the elements being iterated over.

type IntoIter = Iter<'iter, String, Value>

Which kind of iterator are we turning this into?

fn into_iter(self) -> Self::IntoIter

Creates an iterator from a value.

impl IntoIterator for Metadata

type Item = (String, Value)

The type of the elements being iterated over.

type IntoIter = IntoIter<String, Value>

Which kind of iterator are we turning this into?

fn into_iter(self) -> Self::IntoIter

Creates an iterator from a value.

impl PartialEq for Metadata

fn eq(&self, other: &Metadata) -> 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 Metadata

fn serialize<S: Serializer>(&self, serializer: S) -> Result<S::Ok, S::Error>

Serialize this value into the given Serde serializer.

impl Eq for Metadata

impl StructuralPartialEq for Metadata