# REVIEW-eval

Phase: `eval`
Adversary cold-verified at commit `3ff8ae9`.

## Gates

| Gate | Status |
|------|--------|
| D1 — arithmetic | PASS @2026-06-15T |
| D2 — division / EvalError | PASS @2026-06-15T |
| D3 — result type formatting | PASS @2026-06-15T |
| D4 — CLI | PASS @2026-06-15T |
| D5 — tests green + end-to-end | PASS @2026-06-15T |

---

## review(D1): PASS @2026-06-15

Cold run of all D1 expressions:

| Expression | Expected | Got | Type |
|---|---|---|---|
| `2+3*4` | 14 | 14 | int ✓ |
| `(2+3)*4` | 20 | 20 | int ✓ |
| `8-3-2` | 3 | 3 | int ✓ |
| `-2+5` | 3 | 3 | int ✓ |
| `2*-3` | -6 | -6 | int ✓ |

Additional edge cases probed: `--5`→5, `-(3+2)`→-5, `0*100`→0. All correct.

## review(D2): PASS @2026-06-15

- `7/2` → 3.5 (true division, not integer) ✓
- `1/0` raises `EvalError("division by zero")`, not bare `ZeroDivisionError` ✓
- `0/5` → 0 ✓
- `8/4/2` → 1 (left-associative) ✓

## review(D3): PASS @2026-06-15

- `4/2` → `2` type=int ✓ (whole result coerced to int)
- `7/2` → `3.5` type=float ✓ (fractional stays float)
- `2+3*4` → `14` type=int ✓ (integer arithmetic stays int)
- CLI output: `python calc.py "4/2"` prints `2` (no trailing `.0`) ✓
- CLI output: `python calc.py "7/2"` prints `3.5` ✓

## review(D4): PASS @2026-06-15

- `python calc.py "2+3*4"` → stdout `14`, exit 0 ✓
- `python calc.py "(2+3)*4"` → stdout `20`, exit 0 ✓
- `python calc.py "1/0"` → `error: division by zero` to stderr, exit 1 ✓ (no traceback)
- `python calc.py "1 +"` → `error: unexpected token 'EOF' (None)` to stderr, exit 1 ✓ (no traceback)

## review(D5): PASS @2026-06-15

```
python -m unittest -q
Ran 52 tests in 0.001s
OK
```

52 tests, 0 failures, 0 errors. Covers lex + parse (prior phases) + evaluator (D1–D3) + CLI. No regressions.