tree ee34b43689463e1ed0bc533aff7ca4ce6b2c0045
parent cdbb189191d122228d802b9964101a751dd30931
author Sketch🕴️ <skallywag@sketch.dev> 1772291501 +0400
committer Sketch🕴️ <skallywag@sketch.dev> 1772291501 +0400

Add AST package: Node interface, NumberLit, BinaryExpr

- Sealed Node interface with unexported marker method
- NumberLit holds float64 value
- BinaryExpr holds Op (token.Type), Left and Right children
- Tests verify interface satisfaction, data integrity, and nesting