Interface ParentContextInfo

0-based index of the child in the parent (code semantics, e.g., for an if-then-else, the condition will be 0, the then-case will be 1, ...)

The index is adaptive, that means that if the name of an argument exists, it will have index 0, and the value will have index 1. But if the argument is unnamed, its value will get the index 0 instead.

The nesting of the node in the AST

The root node has a nesting of 0, contexts listed in $nestForElement will increase the nesting