Data Checkpoint Progress

[Victor-Adrian]

✅ Completed (9 XP)

• Implemented IdentificationDivisionVisitor & DataDivisionVisitor covering points 1–5
• Enforced data-level hierarchy (no invalid nesting, e.g. level 02 under level 05)
• Validated elementary vs. group: entries with PICTURE IS or LIKE cannot have children
• PICTURE clause validator enforcing:
  -- Only 9/A/X/Z accept repeats; at most one S and one V
  -- Non-empty integer/fractional parts; correct Z-vs-9 ordering; numeric vs. alphanumeric categories, etc.
• Resolved all LIKE references by cloning the target’s type descriptor (cardinality reset to 1)

🕓 Remaining Work

• Check if we need to account for COPY statements in the IDENTIFICATION and DATA Divisions at this level, and how.
• Complete the rest of the checkpoint items (Figurative constants, semantic parsing & defaults, and maaaaaybe MOVE planned by Victor to implement on 13/05)
• After the things above (fingers crossed I do them on Tuesday) we only have non-reserved keywords and contracted expressions left