Struct Map

pub struct Map { /* private fields */ }

Type representing a Liquid object, payload of the Value::Map variant

Implementations

impl Map

pub fn new() -> Self

Makes a new empty Map.

pub fn clear(&mut self)

Clears the map, removing all values.

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

where Cow<'static, str>: Borrow<Q>, Q: Ord + Eq + Hash + ?Sized,

Returns a reference to the value corresponding to the key.

The key may be any borrowed form of the map’s key type, but the ordering on the borrowed form must match the ordering on the key type.

pub fn contains_key<Q>(&self, key: &Q) -> bool

where Cow<'static, str>: Borrow<Q>, Q: Ord + Eq + Hash + ?Sized,

Returns true if the map contains a value for the specified key.

The key may be any borrowed form of the map’s key type, but the ordering on the borrowed form must match the ordering on the key type.

pub fn get_mut<Q>(&mut self, key: &Q) -> Option<&mut Value>

where Cow<'static, str>: Borrow<Q>, Q: Ord + Eq + Hash + ?Sized,

Returns a mutable reference to the value corresponding to the key.

The key may be any borrowed form of the map’s key type, but the ordering on the borrowed form must match the ordering on the key type.

pub fn insert(&mut self, k: Cow<'static, str>, v: Value) -> Option<Value>

Inserts a key-value pair into the map.

If the map did not have this key present, None is returned.

If the map did have this key present, the value is updated, and the old value is returned.

pub fn remove<Q>(&mut self, key: &Q) -> Option<Value>

where Cow<'static, str>: Borrow<Q>, Q: Ord + Eq + Hash + ?Sized,

Removes a key from the map, returning the value at the key if the key was previously in the map.

The key may be any borrowed form of the map’s key type, but the ordering on the borrowed form must match the ordering on the key type.

pub fn entry<S>(&mut self, key: S) -> Entry<'_>

where S: Into<Cow<'static, str>>,

Gets the given key’s corresponding entry in the map for in-place manipulation.

pub fn len(&self) -> usize

Returns the number of elements in the map.

pub fn is_empty(&self) -> bool

Returns true if the map contains no elements.

pub fn iter(&self) -> Iter<'_>

Gets an iterator over the entries of the map.

pub fn iter_mut(&mut self) -> IterMut<'_>

Gets a mutable iterator over the entries of the map.

pub fn keys(&self) -> Keys<'_>

Gets an iterator over the keys of the map.

pub fn values(&self) -> Values<'_>

Gets an iterator over the values of the map.

pub fn values_mut(&mut self) -> ValuesMut<'_>

Gets an iterator over mutable values of the map.

Trait Implementations

impl Clone for Map

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Map

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

Formats the value using the given formatter.

impl Default for Map

fn default() -> Self

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for Map

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

where D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Extend<(Cow<'static, str>, Value)> for Map

fn extend<T>(&mut self, iter: T)

where T: IntoIterator<Item = (Cow<'static, str>, Value)>,

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 FromIterator<(Cow<'static, str>, Value)> for Map

fn from_iter<T>(iter: T) -> Self

where T: IntoIterator<Item = (Cow<'static, str>, Value)>,

Creates a value from an iterator.

impl<'a, Q> Index<&'a Q> for Map

where Cow<'static, str>: Borrow<Q>, Q: Ord + Eq + Hash + ?Sized,

Access an element of this map. Panics if the given key is not present in the map.

match *val {
    Value::Scalar(ref s) => Some(s.to_str()),
    Value::Array(ref arr) => Some(arr[0].to_str()),
    Value::Object(ref map) => Some(map["type"].to_str()),
    _ => None,
}

type Output = Value

The returned type after indexing.

fn index(&self, index: &Q) -> &Value

Performs the indexing (container[index]) operation.

impl<'a, Q> IndexMut<&'a Q> for Map

where Cow<'static, str>: Borrow<Q>, Q: Ord + Eq + Hash + ?Sized,

Mutably access an element of this map. Panics if the given key is not present in the map.

map["key"] = liquid_value!("value");

fn index_mut(&mut self, index: &Q) -> &mut Value

Performs the mutable indexing (container[index]) operation.

impl<'a> IntoIterator for &'a Map

type Item = (&'a Cow<'static, str>, &'a Value)

The type of the elements being iterated over.

type IntoIter = Iter<'a>

Which kind of iterator are we turning this into?

fn into_iter(self) -> Self::IntoIter

Creates an iterator from a value.

impl<'a> IntoIterator for &'a mut Map

type Item = (&'a Cow<'static, str>, &'a mut Value)

The type of the elements being iterated over.

type IntoIter = IterMut<'a>

Which kind of iterator are we turning this into?

fn into_iter(self) -> Self::IntoIter

Creates an iterator from a value.

impl IntoIterator for Map

type Item = (Cow<'static, str>, Value)

The type of the elements being iterated over.

type IntoIter = IntoIter

Which kind of iterator are we turning this into?

fn into_iter(self) -> Self::IntoIter

Creates an iterator from a value.

impl PartialEq for Map

fn eq(&self, other: &Self) -> 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 Map

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

where S: Serializer,

Serialize this value into the given Serde serializer.

impl Eq for Map