public <A, S extends A> SysExpr addUniversalListener(
Class<S> argType, In2Out1<Node, A, Do> callback) {
final In2Out1<Node, Object, Do> was = universalListener;
universalListener =
(node, arg) -> {
final Do toUndo = was.io(node, arg);
if (argType.isInstance(arg) || arg == null) {
final Do undo = callback.io(node, (A) arg);
return toUndo.doAfter(undo);
}
return toUndo;
};
return this;
}
public <A, R> R readAsOneNode(In2Out1<Node, A, R> callback, A arg) {
if (nodes.length == 1) {
final Node node = nodes[0].out1();
try (Do undo = universalListener.io(node, arg)) {
R r = callback.io(node, arg);
return r;
}
}
JsonContainerExpr json = JsonContainerExpr.jsonArray(nodes().map(n -> (Expression) n));
try (Do undo = universalListener.io(json, arg)) {
R r = callback.io(json, arg);
return r;
}
}
public <A, Vis extends VoidVisitor<A>> In3<Vis, Node, A> voidVisit(Vis vis, A arg) {
final In3 factory = voidFactory.io(vis, arg);
return (v, n, a) -> {
try (Do undo = universalListener.io(n, a)) {
factory.in(v, n, a);
}
};
}
public <A, R, Vis extends GenericVisitor<R, A>> In3Out1<Vis, Node, A, R> genericVisit(
Vis vis, A arg) {
final In3Out1 factory = genericFactory.io(vis, arg);
return (v, n, a) -> {
try (Do undo = universalListener.io(n, a)) {
return (R) factory.io(v, n, a);
}
};
}
public <A> SysExpr readNodesWhile(Filter1<Node> filter, In1<Node> callback, A arg) {
for (Out1<Node> node : nodes) {
final Node n = node.out1();
if (filter.filter1(n)) {
try (final Do undo = universalListener.io(n, arg)) {
callback.in(n);
}
} else {
return this;
}
}
return this;
}