sophia_api/term/
matcher.rs

//! I define generic traits and default implementations for *matchers*,
//! objects that can be used to match zero, one or several terms.
//!
//! For a list of matcher implementations,
//! check [`TermMarcher`'s ](TermMatcher#foreign-impls) and
//! [`GraphNameMatcher`'s implementors lists](GraphNameMatcher#foreign-impls).
//!
//! For methods using matchers (with examples), see for example
//! [`Triple::matched_by`],
//! [`Graph::triples_matching`](crate::graph::Graph::triples_matching),
//! [`MutableGraph::remove_matching`](crate::graph::MutableGraph::remove_matching),
//! [`MutableGraph::retain_matching`](crate::graph::MutableGraph::retain_matching),
//! [`Dataset::quads_matching`](crate::dataset::Dataset::quads_matching),
//! [`MutableDataset::remove_matching`](crate::dataset::MutableDataset::remove_matching),
//! [`MutableDataset::retain_matching`](crate::dataset::MutableDataset::retain_matching).

use super::*;

mod _any;
mod _datatype_matcher;
mod _graph_name_matcher;
mod _language_tag_matcher;
mod _matcher_ref;
mod _term_matcher_gn;
mod _trait;

pub use _any::*;
pub use _datatype_matcher::*;
pub use _graph_name_matcher::*;
pub use _language_tag_matcher::*;
pub use _matcher_ref::*;
pub use _term_matcher_gn::*;
pub use _trait::*;

#[cfg(test)]
mod test {
    use super::*;
    use crate::ns::xsd;
    use sophia_iri::IriRef;

    const T1: IriRef<&str> = IriRef::new_unchecked_const("tag:t1");
    const T2: IriRef<&str> = IriRef::new_unchecked_const("tag:t2");
    const T3: IriRef<&str> = IriRef::new_unchecked_const("tag:t3");

    fn is_term_matcher<M: TermMatcher>(_: M) {}

    #[allow(dead_code)] // just check this compiles
    fn check_term_macher_implementations() {
        is_term_matcher(Any);
        is_term_matcher(Some(T1));
        is_term_matcher([T1, T2]);
        is_term_matcher(&[T1, T2][..]);
        is_term_matcher(|t: SimpleTerm| t != T1);
        is_term_matcher(TermKind::Iri);
        is_term_matcher(([T1], [T2], [T3]));
        is_term_matcher([T1, T2].matcher_ref());
        is_term_matcher(Any * xsd::string);
    }

    fn is_graph_name_matcher<M: GraphNameMatcher>(_: M) {}

    #[allow(dead_code)] // just check this compiles
    fn check_graph_name_macher_implementations() {
        is_graph_name_matcher(Any);
        is_graph_name_matcher(Some(Some(T1)));
        is_graph_name_matcher([Some(T1), Some(T2), None]);
        is_graph_name_matcher(&[Some(T1), Some(T2), None][..]);
        is_graph_name_matcher(|t: Option<SimpleTerm>| t.is_some());
        is_graph_name_matcher([T1, T2].gn());
        is_graph_name_matcher(Some(TermKind::Iri));
        is_graph_name_matcher(Some(([T1], [T2], [T3])));
        is_graph_name_matcher([Some(T1)].matcher_ref());
    }

    #[test]
    fn option() {
        let none: Option<IriRef<&str>> = None;
        assert!(!none.matches(&T1));
        assert!(!none.matches(&T2));
        assert!(!none.matches(&T3));
        assert_eq!(none.constant(), None);

        let some = Some(T1);
        assert!(some.matches(&T1));
        assert!(!some.matches(&T2));
        assert!(!none.matches(&T3));
        assert_eq!(some.constant(), Some(&T1));
    }

    #[test]
    fn array() {
        let a0: [IriRef<&str>; 0] = [];
        assert!(!a0.matches(&T1));
        assert!(!a0.matches(&T2));
        assert!(!a0.matches(&T3));
        assert_eq!(a0.constant(), None);

        let a1 = [T1];
        assert!(a1.matches(&T1));
        assert!(!a1.matches(&T2));
        assert!(!a1.matches(&T3));
        assert_eq!(a1.constant(), Some(&T1));

        let a2 = [T1, T2];
        assert!(a2.matches(&T1));
        assert!(a2.matches(&T2));
        assert!(!a2.matches(&T3));
        assert_eq!(a2.constant(), None);

        let a3 = [T1, T2, T3];
        assert!(a3.matches(&T1));
        assert!(a3.matches(&T2));
        assert!(a3.matches(&T3));
        assert_eq!(a3.constant(), None);
    }

    #[test]
    fn slice() {
        let a0: [IriRef<&str>; 0] = [];
        let s0 = &a0[..];
        assert!(!s0.matches(&T1));
        assert!(!s0.matches(&T2));
        assert!(!s0.matches(&T3));
        assert_eq!(s0.constant(), None);

        let a1 = [T1];
        let s1 = &a1[..];
        assert!(s1.matches(&T1));
        assert!(!s1.matches(&T2));
        assert!(!s1.matches(&T3));
        assert_eq!(s1.constant(), Some(&T1));

        let a2 = [T1, T2];
        let s2 = &a2[..];
        assert!(s2.matches(&T1));
        assert!(s2.matches(&T2));
        assert!(!s2.matches(&T3));
        assert_eq!(s2.constant(), None);

        let a3 = [T1, T2, T3];
        let s3 = &a3[..];
        assert!(s3.matches(&T1));
        assert!(s3.matches(&T2));
        assert!(s3.matches(&T3));
        assert_eq!(s3.constant(), None);
    }

    #[test]
    fn term_kind() {
        assert!(TermKind::Iri.matches(&T1));
        assert!(!TermKind::BlankNode.matches(&T1));
    }

    #[test]
    fn tuple_as_embedded_triple() {
        let et = SimpleTerm::Triple(Box::new([T1, T2, T3].map(SimpleTerm::from_term)));
        assert!(([T1], TermKind::Iri, Any).matches(&et));
        assert!(!([T2], TermKind::Iri, Any).matches(&et));
        assert!(!([T1], TermKind::BlankNode, Any).matches(&et));
        assert!(!([T1], TermKind::Iri, [T1]).matches(&et));
    }

    #[test]
    fn closure() {
        let c = |t: SimpleTerm| t != T1;
        assert!(!TermMatcher::matches(&c, &T1));
        assert!(TermMatcher::matches(&c, &T2));
        assert!(TermMatcher::matches(&c, &T3));
        assert!(TermMatcher::constant(&c).is_none());
    }

    #[test]
    fn any() {
        assert!(TermMatcher::matches(&Any, &T1));
        assert!(TermMatcher::matches(&Any, &T2));
        assert!(TermMatcher::matches(&Any, &T3));
        assert!(TermMatcher::constant(&Any).is_none());
    }

    #[test]
    fn datatype_matcher() {
        let m1 = Any * xsd::string; // testing Mul<NsTerm>
        assert!(!TermMatcher::matches(&m1, &T1));
        assert!(!TermMatcher::matches(&m1, &42));
        assert!(TermMatcher::matches(&m1, "hello"));
        let m1 = Any * xsd::string.iri().unwrap(); // testing Mul<IriRef>
        assert!(!TermMatcher::matches(&m1, &T1));
        assert!(!TermMatcher::matches(&m1, &42));
        assert!(TermMatcher::matches(&m1, "hello"));
    }

    #[test]
    fn language_tag_matcher() {
        let en = LanguageTag::new_unchecked("en");
        let enus = LanguageTag::new_unchecked("en-US");
        let fr = LanguageTag::new_unchecked("fr");
        let m1 = Any * en; // testing Mul<NsTerm>
        assert!(!TermMatcher::matches(&m1, &T1));
        assert!(!TermMatcher::matches(&m1, &42));
        assert!(!TermMatcher::matches(&m1, "hello"));
        assert!(TermMatcher::matches(&m1, &("hello" * en)));
        assert!(!TermMatcher::matches(&m1, &("hello" * enus)));
        assert!(!TermMatcher::matches(&m1, &("hello" * fr)));
    }

    #[test]
    fn matcher_ref() {
        let c = [T1].matcher_ref();
        assert!(c.matches(&T1));
        assert!(!c.matches(&T2));
        assert!(!c.matches(&T3));
        assert_eq!(c.constant(), Some(&T1));
    }

    const DEFAULT: Option<&IriRef<&str>> = None;

    #[test]
    fn graph_name_option() {
        let none: Option<Option<IriRef<&str>>> = None;
        assert!(!none.matches(DEFAULT));
        assert!(!none.matches(Some(&T1)));
        assert!(!none.matches(Some(&T2)));
        assert!(!none.matches(Some(&T3)));
        assert_eq!(none.constant(), None);

        let some = Some(Some(T1));
        assert!(!some.matches(DEFAULT));
        assert!(some.matches(Some(&T1)));
        assert!(!some.matches(Some(&T2)));
        assert!(!none.matches(Some(&T3)));
        assert_eq!(some.constant(), Some(Some(&T1)));
    }

    #[test]
    fn graph_name_array() {
        let a0: [Option<&IriRef<&str>>; 0] = [];
        assert!(!a0.matches(DEFAULT));
        assert!(!a0.matches(Some(&T1)));
        assert!(!a0.matches(Some(&T2)));
        assert!(!a0.matches(Some(&T3)));
        assert_eq!(a0.constant(), None);

        let a1 = [Some(T1)];
        assert!(!a1.matches(DEFAULT));
        assert!(a1.matches(Some(&T1)));
        assert!(!a1.matches(Some(&T2)));
        assert!(!a1.matches(Some(&T3)));
        assert_eq!(a1.constant(), Some(Some(&T1)));

        let a2 = [Some(T1), None];
        assert!(a2.matches(DEFAULT));
        assert!(a2.matches(Some(&T1)));
        assert!(!a2.matches(Some(&T2)));
        assert!(!a2.matches(Some(&T3)));
        assert_eq!(a2.constant(), None);

        let a3 = [Some(T1), None, Some(T3)];
        assert!(a3.matches(DEFAULT));
        assert!(a3.matches(Some(&T1)));
        assert!(!a3.matches(Some(&T2)));
        assert!(a3.matches(Some(&T3)));
        assert_eq!(a3.constant(), None);
    }

    #[test]
    fn graph_name_slice() {
        let a0: [Option<&IriRef<&str>>; 0] = [];
        let s0 = &a0[..];
        assert!(!s0.matches(DEFAULT));
        assert!(!s0.matches(Some(&T1)));
        assert!(!s0.matches(Some(&T2)));
        assert!(!s0.matches(Some(&T3)));
        assert_eq!(s0.constant(), None);

        let a1 = [Some(T1)];
        let s1 = &a1[..];
        assert!(!s1.matches(DEFAULT));
        assert!(s1.matches(Some(&T1)));
        assert!(!s1.matches(Some(&T2)));
        assert!(!s1.matches(Some(&T3)));
        assert_eq!(s1.constant(), Some(Some(&T1)));

        let a2 = [Some(T1), None];
        let s2 = &a2[..];
        assert!(s2.matches(DEFAULT));
        assert!(s2.matches(Some(&T1)));
        assert!(!s2.matches(Some(&T2)));
        assert!(!s2.matches(Some(&T3)));
        assert_eq!(s2.constant(), None);

        let a3 = [Some(T1), None, Some(T3)];
        let s3 = &a3[..];
        assert!(s3.matches(DEFAULT));
        assert!(s3.matches(Some(&T1)));
        assert!(!s3.matches(Some(&T2)));
        assert!(s3.matches(Some(&T3)));
        assert_eq!(s3.constant(), None);
    }

    #[test]
    fn graph_name_term_kind() {
        assert!(Some(TermKind::Iri).matches(Some(&T1)));
        assert!(!Some(TermKind::BlankNode).matches(Some(&T1)));
    }

    #[test]
    fn graph_name_tuple_as_embedded_triple() {
        let et = SimpleTerm::Triple(Box::new([T1, T2, T3].map(SimpleTerm::from_term)));
        let gn = Some(&et);
        assert!(Some(([T1], TermKind::Iri, Any)).matches(gn));
        assert!(!Some(([T2], TermKind::Iri, Any)).matches(gn));
        assert!(!Some(([T1], TermKind::BlankNode, Any)).matches(gn));
        assert!(!Some(([T1], TermKind::Iri, [T1])).matches(gn));
    }

    #[test]
    fn graph_name_closure() {
        let c = |t: Option<SimpleTerm>| !graph_name_eq(t, Some(&T1));
        assert!(GraphNameMatcher::matches(&c, DEFAULT));
        assert!(!GraphNameMatcher::matches(&c, Some(&T1)));
        assert!(GraphNameMatcher::matches(&c, Some(&T2)));
        assert!(GraphNameMatcher::matches(&c, Some(&T3)));
        assert!(GraphNameMatcher::constant(&c).is_none());
    }

    #[test]
    fn graph_name_any() {
        assert!(GraphNameMatcher::matches(&Any, DEFAULT));
        assert!(GraphNameMatcher::matches(&Any, Some(&T1)));
        assert!(GraphNameMatcher::matches(&Any, Some(&T2)));
        assert!(GraphNameMatcher::matches(&Any, Some(&T3)));
        assert!(GraphNameMatcher::constant(&Any).is_none());
    }

    #[test]
    fn graph_name_term_matcher_gn() {
        let a1 = [T1].gn();
        assert!(!a1.matches(DEFAULT));
        assert!(a1.matches(Some(&T1)));
        assert!(!a1.matches(Some(&T2)));
        assert!(!a1.matches(Some(&T3)));
        assert_eq!(a1.constant(), Some(Some(&T1)));

        let a2 = [T1, T2].gn();
        assert!(!a2.matches(DEFAULT));
        assert!(a2.matches(Some(&T1)));
        assert!(a2.matches(Some(&T2)));
        assert!(!a2.matches(Some(&T3)));
        assert_eq!(a2.constant(), None);
    }

    #[test]
    fn graph_name_matcher_ref() {
        let c = [Some(T1)].matcher_ref();
        assert!(!c.matches(DEFAULT));
        assert!(c.matches(Some(&T1)));
        assert!(!c.matches(Some(&T2)));
        assert!(!c.matches(Some(&T3)));
        assert_eq!(c.constant(), Some(Some(&T1)));
    }
}
sophia_api/term/matcher.rs

sophia_api/term/
matcher.rs
