Enum Value 

pub enum Value<T = IriBuf> {
    Literal(Literal, Option<T>),
    LangString(LangString),
    Json(Value),
}

Value object.

Either a typed literal value, or an internationalized language string.

Variants

Literal(Literal, Option<T>)

Typed literal value.

LangString(LangString)

Language tagged string.

Json(Value)

JSON literal value.

Implementations

impl<T> Value<T>

pub fn null() -> Self

Creates a null value object.

pub fn as_str(&self) -> Option<&str>

Returns this value as a string slice.

pub fn as_literal(&self) -> Option<(&Literal, Option<&T>)>

Returns the literal and its type, if this is a typed literal value.

pub fn literal_type(&self) -> Option<&T>

Returns the @type IRI of this value, if it is a typed literal with one.

pub fn set_literal_type(&mut self, ty: Option<T>) -> Option<T>

Sets the @type IRI of a typed literal value, returning the type it replaced.

Has no effect and returns None if the value is not a typed literal.

pub fn map_literal_type<F: FnOnce(Option<T>) -> Option<T>>(&mut self, f: F)

Replaces the @type IRI of a typed literal value with the result of f.

Has no effect if the value is not a typed literal.

pub fn as_bool(&self) -> Option<bool>

Returns the value as a boolean, if it is a literal holding one.

pub fn as_number(&self) -> Option<&Number>

Returns the value as a number, if it is a literal holding one.

pub fn typ(&self) -> Option<TypeRef<'_, T>>

Returns the @type of the value, if it has one.

JSON literal values report TypeRef::Json; language-tagged strings have no type and report None.

pub fn language(&self) -> Option<&LenientLangTag>

Returns the @language of the value.

Returns None if the value is not a language-tagged string, or is one carrying only a @direction.

pub fn direction(&self) -> Option<Direction>

Returns the @direction of the value.

Returns None if the value is not a language-tagged string, or is one carrying only a @language.

pub fn entries(&self) -> Entries<'_, T>

Returns an iterator over the entries of the JSON representation of the value object.

pub fn canonicalize_with(&mut self, buffer: &mut Buffer)

Puts the literal held by this value object into canonical form, using the given buffer to render numbers.

pub fn canonicalize(&mut self)

Puts the literal held by this value object into canonical form.

pub fn map_ids<U>(self, map_iri: impl FnOnce(T) -> U) -> Value<U>

Rewrites the @type IRI of the value, if it has one, with the given function.

Trait Implementations

impl<T, B> Any<T, B> for Value<T>

fn as_ref(&self) -> Ref<'_, T, B>

Borrows the object as a value, node or list reference.

fn id(&self) -> Option<&Id<T, B>>

Returns the identifier (@id) of the object, if it is a node object with one.

fn language<'a>(&'a self) -> Option<&'a LenientLangTag>

where T: 'a, B: 'a,

Returns the language tag of this value, if it carries one.

fn is_value(&self) -> bool

Checks whether the object is a value object.

fn is_node(&self) -> bool

Checks whether the object is a node object.

fn is_graph(&self) -> bool

Checks whether the object is a graph object (a node object with a @graph entry).

fn is_list(&self) -> bool

Checks whether the object is a list object.

impl<T: Clone> Clone for Value<T>

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<T: Debug> Debug for Value<T>

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

Formats the value using the given formatter.

impl<T: Eq> Eq for Value<T>

impl<T, B> From<Value<T>> for Object<T, B>

fn from(value: Value<T>) -> Self

Converts to this type from the input type.

impl<T: Hash> Hash for Value<T>

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<T, N: IriVocabulary<Iri = T>> IntoJsonWithContext<N> for Value<T>

fn into_json_with(self, vocabulary: &N) -> Value

Converts this value into JSON, resolving the identifiers it holds against the given vocabulary.

impl<T, I: Interpretation> LinkedData<I> for Value<T>

where T: LinkedDataResource<I>,

fn visit<S>(&self, visitor: S) -> Result<S::Ok, S::Error>

where S: Visitor<I>,

Visit the RDF dataset represented by this type.

impl<T, I: Interpretation> LinkedDataGraph<I> for Value<T>

where T: LinkedDataResource<I>,

fn visit_graph<S>(&self, visitor: S) -> Result<S::Ok, S::Error>

where S: GraphVisitor<I>,

Visits the subjects of the graph represented by this value.

impl<T, I: Interpretation> LinkedDataPredicateObjects<I> for Value<T>

where T: LinkedDataResource<I>,

fn visit_objects<S>(&self, visitor: S) -> Result<S::Ok, S::Error>

where S: PredicateObjectsVisitor<I>,

Visits the objects this predicate points at.

impl<T, I: Interpretation> LinkedDataResource<I> for Value<T>

where T: LinkedDataResource<I>,

fn interpretation( &self, interpretation: &mut I, ) -> ResourceInterpretation<'_, I>

Returns the interpretation of this resource, inserting it into interpretation if required.

fn lexical_representation<'a>( &'a self, interpretation: &'a mut I, ) -> Option<CowRdfTerm<'a>>

where I: ReverseInterpretation + ReverseLocalInterpretation,

Returns the lexical term representing this resource, if any.

fn reference_interpretation( &self, interpretation: &mut I, ) -> ResourceInterpretation<'_, I>

Returns the interpretation to use when this resource appears as a reference rather than as a subject with properties.

impl<T, I: Interpretation> LinkedDataSubject<I> for Value<T>

where T: LinkedDataResource<I>,

fn visit_subject<S>(&self, visitor: S) -> Result<S::Ok, S::Error>

where S: SubjectVisitor<I>,

Visits the properties of the subject represented by this value.

impl<T: Ord> Ord for Value<T>

fn cmp(&self, other: &Self) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

fn clamp_to<R>(self, range: R) -> Self

where Self: Sized, R: ClampBounds<Self>,

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

Restrict a value to a certain range.

impl<T: PartialEq> PartialEq for Value<T>

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

Equality operator ==.

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

Inequality operator !=.

impl<T: PartialOrd> PartialOrd for Value<T>

fn partial_cmp(&self, other: &Self) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

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

Tests less than (for self and other) and is used by the < operator.

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

Tests less than or equal to (for self and other) and is used by the <= operator.

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

Tests greater than (for self and other) and is used by the > operator.

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

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl<T: PartialEq> StructuralPartialEq for Value<T>