Struct Options 

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

The options of a function or markup, in source order.

Duplicates are representable, so that validation can report Duplicate Option Name; a valid message has none.

Implementations

impl<'a> Options<'a>

pub const fn new() -> Self

No options (does not allocate).

pub fn with_capacity(capacity: usize) -> Self

No options, with room for capacity without reallocating.

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

Appends an option (duplicates are kept).

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

(identifier, value) pairs, in source order.

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

The value of the first option named exactly name.

pub fn len(&self) -> usize

How many options (duplicates included).

pub fn is_empty(&self) -> bool

No options.

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

The same options, owned.

Trait Implementations

impl<'a> Clone for Options<'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 Options<'a>

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

Formats the value using the given formatter.

impl<'a> Default for Options<'a>

fn default() -> Self

Returns the “default value” for a type.

impl<'a> Eq for Options<'a>

impl<'a> FromIterator<(Cow<'a, str>, OptionValue<'a>)> for Options<'a>

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

Creates a value from an iterator.

impl<'a> Hash for Options<'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 Options<'a>

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

Equality operator ==.

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

Inequality operator !=.

impl Serialize for Options<'_>

Available on crate feature serde only.

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

Serialize this value into the given Serde serializer.

impl<'a> StructuralPartialEq for Options<'a>