Apply a list of functions to each level in a nested parse table.
pre_visit() applies funs before it preceeds to the children,
(that is, starts from the outermost level of nesting progressing
to the innermost level), post_visit() preceeds to its children
before applying the functions (meaning it first applies the functions
to the innermost level of nesting first and then going outwards).
pre_visit(pd_nested, funs) post_visit(pd_nested, funs)
| pd_nested | A nested parse table. |
|---|---|
| funs | A list of transformer functions. |
Other visitors: visit_one