The PermissiveVisitor overrides the root AST nodes with empty visiting methods.
The TransitiveVisitor implements the AST traversal logic for all AST nodes.
Classic Visitor class which implements visit methods for all the AST nodes present in the compiler. The visit methods for AST nodes created at parse time are inherited while the visiting methods for AST nodes created at semantic time are implemented.
Provides a visitor class visiting all AST nodes present in the compiler.