Struct Attributes 

pub struct Attributes<'a>(/* private fields */);

The attributes of an expression or markup, in source order; a None value is the spec’s true (an attribute written without a value).

Implementations

impl<'a> Attributes<'a>

pub const fn new() -> Self

No attributes (does not allocate).

pub fn with_capacity(capacity: usize) -> Self

No attributes, with room for capacity without reallocating.

pub fn push(&mut self, name: Cow<'a, str>, value: Option<Literal<'a>>)

Appends an attribute (duplicates are kept).

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

(identifier, value) pairs, in source order.

pub fn get(&self, name: &str) -> Option<Option<&Literal<'a>>>

The value of the last attribute named exactly name — all but the last are ignored (syntax.md, “Attributes”): None if there is none, Some(None) if it has no value.

pub fn len(&self) -> usize

How many attributes (duplicates included).

pub fn is_empty(&self) -> bool

No attributes.

pub fn into_owned(self) -> Attributes<'static>

The same attributes, owned.

Trait Implementations

impl<'a> Clone for Attributes<'a>

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<'a> Debug for Attributes<'a>

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

Formats the value using the given formatter.

impl<'a> Default for Attributes<'a>

fn default() -> Self

Returns the “default value” for a type.

impl<'a> Eq for Attributes<'a>

impl<'a> FromIterator<(Cow<'a, str>, Option<Literal<'a>>)> for Attributes<'a>

fn from_iter<I: IntoIterator<Item = (Cow<'a, str>, Option<Literal<'a>>)>>( iter: I, ) -> Self

Creates a value from an iterator.

impl<'a> Hash for Attributes<'a>

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl<'a> PartialEq for Attributes<'a>

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

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl Serialize for Attributes<'_>

Available on crate feature serde only.

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

A repeated name writes only its last occurrence: the syntax allows the repeat (unique names are only a SHOULD) and only the last of a repeated attribute counts (syntax.md, “Attributes”), while a JSON object holds a name once. The model keeps every occurrence, as written.

impl<'a> StructuralPartialEq for Attributes<'a>