Execute an action after visiting children of t. Return t or
a rewritten t. It is up to the visitor to decide what to do
with the return value.
Parameters
t: any
Returns any
pre
pre(t: any): any
Execute an action before visiting children of t. Return t or
a rewritten t. It is up to the visitor to decide what to do
with the return value. Children of returned value will be
visited if using TreeVisitor.visit().
Execute an action after visiting children of t. Return t or a rewritten t. It is up to the visitor to decide what to do with the return value.