A class that creates a new ASG from an old one. This is a helper base for
more specialized classes that manipulate the ASG based on
the comments in the nodes
Methods Details:
replace the ASG with the newly created one
Pushes the current scope onto the stack and starts a new one
Pops the current scope from the stack, and appends the given
declaration to it
Adds the given decl to the current scope
Returns the current scope: a list of declarations