Method combinator

src/main/java/org/jsoup/select/QueryParser.java:151–167

(Evaluator left, char combinator, Evaluator right)

    }

    static Evaluator combinator(Evaluator left, char combinator, Evaluator right) {
        switch (combinator) {
            case '>':
                ImmediateParentRun run = left instanceof ImmediateParentRun ?
                    (ImmediateParentRun) left : new ImmediateParentRun(left);
                run.add(right);
                return run;
            case ' ':
                return and(new StructuralEvaluator.Ancestor(left), right);
            case '+':
                return and(new StructuralEvaluator.ImmediatePreviousSibling(left), right);
            case '~':
                return and(new StructuralEvaluator.PreviousSibling(left), right);
            default:
                throw new Selector.SelectorParseException("Unknown combinator '%s'", combinator);
        }
    }

    @Nullable Evaluator parseSubclass() {
        //  Subclass: ID | Class | Attribute | Pseudo