Enum PathAst 

pub enum PathAst {
    Pred(String, bool),
    Rep(Box<PathAst>, Rep),
    Seq(Box<PathAst>, Box<PathAst>),
    Alt(Box<PathAst>, Box<PathAst>),
    NegatedSet(Vec<String>, bool),
}

A lowered property path expression, evaluated as a binary relation over the graph’s nodes.

Variants

Pred(String, bool)

A single predicate, optionally reversed.

Rep(Box<PathAst>, Rep)

Repetition (*/+/?) of a sub-path.

Seq(Box<PathAst>, Box<PathAst>)

Sequence a/b (relational composition).

Alt(Box<PathAst>, Box<PathAst>)

Alternative a|b (union).

NegatedSet(Vec<String>, bool)

Negated property set !(p1|…|pn) — one step over any predicate not in the set, in the given direction (reversed for the ^p members, which spargebra wraps in a Reverse).

Trait Implementations

impl Clone for PathAst

fn clone(&self) -> PathAst

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for PathAst

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

Formats the value using the given formatter.