Trait Literal 

pub trait Literal:
    Debug
    + Clone
    + Display
    + PartialEq
    + Eq
    + Hash {
    // Required methods
    fn lexical_form(&self) -> &str;
    fn lang(&self) -> Option<Lang>;
    fn datatype(&self) -> IriRef;
    fn to_concrete_literal(&self) -> Option<ConcreteLiteral>;

    // Provided methods
    fn to_bool(&self) -> Option<bool> { ... }
    fn to_integer(&self) -> Option<isize> { ... }
    fn to_date_time(&self) -> Option<XsdDateTime> { ... }
    fn to_double(&self) -> Option<f64> { ... }
    fn to_decimal(&self) -> Option<Decimal> { ... }
}

Types that implement this trait can be used as RDF Literals.

This trait provides methods for accessing literal properties and converting literals to specific Rust types based on their XSD datatype.

Required Methods

fn lexical_form(&self) -> &str

Returns the lexical form of the literal as a string slice.

fn lang(&self) -> Option<Lang>

Returns the language tag if this is a language-tagged literal.

fn datatype(&self) -> IriRef

Returns the datatype IRI of this literal.

fn to_concrete_literal(&self) -> Option<ConcreteLiteral>

Converts this literal to an ConcreteLiteral if possible.

Provided Methods

fn to_bool(&self) -> Option<bool>

Attempts to convert this literal to a boolean value.

Returns Some(bool) if the literal has datatype xsd:boolean and a valid lexical form (“true” or “false”).

fn to_integer(&self) -> Option<isize>

Attempts to convert this literal to an integer value.

Returns Some(isize) if the literal has datatype xsd:integer and a valid parseable lexical form.

fn to_date_time(&self) -> Option<XsdDateTime>

Attempts to convert this literal to a datetime value.

Returns Some(XsdDateTime) if the literal has datatype xsd:dateTime and a valid parseable lexical form.

fn to_double(&self) -> Option<f64>

Attempts to convert this literal to a double-precision float value.

Returns Some(f64) if the literal has datatype xsd:double and a valid parseable lexical form.

fn to_decimal(&self) -> Option<Decimal>

Attempts to convert this literal to a decimal value.

Returns Some(Decimal) if the literal has datatype xsd:decimal and a valid parseable lexical form.

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementations on Foreign Types

impl Literal for Literal

Implements the Literal trait for OxLiteral.

Provides access to literal values, language tags, and datatypes from oxrdf literals.

fn lexical_form(&self) -> &str

Returns the lexical form of the literal as a string slice.

fn lang(&self) -> Option<Lang>

Returns the language tag if this is a language-tagged string.

Returns

• Some(Lang) if this literal has a language tag (e.g., “en”, “es”)
• None if this literal is not language-tagged

fn datatype(&self) -> IriRef

Returns the datatype IRI of this literal.

fn to_concrete_literal(&self) -> Option<ConcreteLiteral>

Attempts to convert this literal to a concrete typed value.

Returns

Some(ConcreteLiteral) if the literal can be parsed into a concrete type, None otherwise.

Implementors