AST Node Interface.
implemented by ValueStream and Cell.
ast:eval(scope)– evaluate this AST Node.
ast:clone(parent)– create a clone with its own identity.
ast:stringify()– stringify this AST Node.
- – evaluate this AST Node.
– create a clone with its own identity.
creates a clone of this Cell with its own identity by prepending a
parentTag (and cloning all child expressions recursively).
– stringify this AST Node.
Should return the exact string this node was parsed from (if it was parsed).
- (string): the exact string this Node was parsed from