rdfx 0.23.1

RDF 1.2 data-structures, traits and utilities: terms (incl. triple terms), triples, quads, interpretations, graphs, datasets, unstar/restar reification helpers.
Documentation 
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use std::{cmp::Ordering, fmt};

use crate::{LiteralRef, RdfDisplay};
use iri_rs::Iri;

use super::Term;

/// Lexical RDF term reference.
#[derive(Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord)]
pub enum TermRef<'a> {
    Iri(Iri<&'a str>),

    Literal(LiteralRef<'a>),
}

impl TermRef<'_> {
    pub fn to_owned(self) -> Term {
        match self {
            Self::Iri(iri) => Term::Iri(iri.into()),
            Self::Literal(l) => Term::Literal(l.to_owned()),
        }
    }
}

impl PartialEq<Term> for TermRef<'_> {
    fn eq(&self, other: &Term) -> bool {
        match (self, other) {
            (Self::Iri(a), Term::Iri(b)) => a.as_str() == b.as_str(),
            (Self::Literal(a), Term::Literal(b)) => a == b,
            _ => false,
        }
    }
}

impl fmt::Display for TermRef<'_> {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        match self {
            Self::Iri(iri) => iri.fmt(f),
            Self::Literal(l) => l.fmt(f),
        }
    }
}

impl RdfDisplay for TermRef<'_> {
    fn rdf_fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        match self {
            Self::Iri(iri) => iri.rdf_fmt(f),
            Self::Literal(l) => l.rdf_fmt(f),
        }
    }
}

impl PartialOrd<Term> for TermRef<'_> {
    fn partial_cmp(&self, other: &Term) -> Option<Ordering> {
        match (self, other) {
            (Self::Iri(a), Term::Iri(b)) => a.as_str().partial_cmp(b.as_str()),
            (Self::Iri(_), Term::Literal(_)) => Some(Ordering::Less),
            (Self::Literal(_), Term::Iri(_)) => Some(Ordering::Greater),
            (Self::Literal(a), Term::Literal(b)) => (*a).partial_cmp(b),
        }
    }
}