Extending the Grammar

• Add grammar to .g4
  • Names at bottom
  • Resolution works upward
• Add parse-only tests
• Create AST objects
  • Make sure string round-trip works (use self.children)
  • Properly handle if certain syntax is optional
  • implement evaluate and symbol
• Add ast round-trip tests
• Add parse that goes to AST
• Add evaluation tests
• Add validate test
• Add rewrite tests
• Add tests to run queries