Programmatically insert a nonliteral node into the parse tree.
returnedPnode = pninsert(name,pnode,after_n)
returnedPnode - type: pnode
name - type: str Name for nonliteral node
pnode- type: node Node to insert after or before
after_n - type: int If == 1, insert after. If == 0, insert before
Returns the created and inserted node.
Can only be used within the @CODE region, not meant to be used in rule action regions.
# Get the root node of the parse tree, go to its first child, add a
_BLANKLINE node after the child.
# This function helps place separators and other markers or sentinels into
a parse tree.
L("n") = pndown(pnroot());
pninsert("_BLANKLINE",L("n"),1);