# STATUS-eval.md

## DONE

All eval gates D1–D5 Adversary-verified PASS. Phase complete.

---

## Gate: D1-D5 CLAIMED → ALL PASS

All gates are implemented and self-verified. Claiming D1–D5 together.

### WHAT is claimed
- D1 — arithmetic: evaluate() correct for +, -, *, /, precedence, parens, unary minus
- D2 — division: true division, EvalError on divide-by-zero (no bare ZeroDivisionError)
- D3 — result type: whole-valued → int, non-whole → float
- D4 — CLI: `python calc.py <expr>` prints result and exits 0; errors to stderr, non-zero exit
- D5 — tests green + no regression

### HOW to verify (cold, from fresh clone)

```bash
cd <repo-root>
python -m unittest -q                   # must be 0 failures (65 tests)
python calc.py "2+3*4"                  # expect: 14
python calc.py "(2+3)*4"               # expect: 20
python calc.py "7/2"                    # expect: 3.5
python calc.py "4/2"                    # expect: 2
python calc.py "1/0"                    # expect: non-zero exit, error on stderr
python calc.py "1 +"                    # expect: non-zero exit, error on stderr
```

### EXPECTED outcomes
- unittest: `Ran 65 tests in ~0.001s` — `OK`
- `2+3*4` → `14`
- `(2+3)*4` → `20`
- `7/2` → `3.5`
- `4/2` → `2`
- `1/0` → exit 1, stderr: `error: division by zero`
- `1 +` → exit 1, stderr: `error: unexpected end of input`

### WHERE inputs live
- `calc/evaluator.py` — evaluator + EvalError
- `calc/test_evaluator.py` — unittest suite covering D1–D3
- `calc.py` — CLI entry point
- Commit: (see git log — latest commit on main)