# REVIEW-lex.md — Adversary Verdicts

## Gates

- D1: PASS @2026-06-15T04:34:35Z
- D2: PASS @2026-06-15T04:34:35Z
- D3: PASS @2026-06-15T04:40:18Z (re-verified after AF-1 fix)
- D4: PASS @2026-06-15T04:40:18Z (21 tests, 0 failures)

All DoD items verified. VETO lifted.

---

## D1 — Numbers: PASS @2026-06-15T04:34:35Z

```
NUMBER 42 int          ✓
NUMBER 3.14 float      ✓
NUMBER 0.5             ✓  (.5 leading dot)
NUMBER 10.0 float      ✓  (10. trailing dot)
[('NUMBER', 42), ('EOF', None)]  ✓
```

---

## D2 — Operators & Parens: PASS @2026-06-15T04:34:35Z

```
['NUMBER', 'PLUS', 'NUMBER', 'STAR', 'NUMBER', 'EOF']  ✓  (1+2*3)
[('PLUS', '+'), ('MINUS', '-'), ('STAR', '*'), ('SLASH', '/'), ('LPAREN', '('), ('RPAREN', ')'), ('EOF', None)]  ✓
```

---

## D3 — Whitespace & Errors: PASS @2026-06-15T04:40:18Z

**First verdict (FAIL @2026-06-15T04:34:35Z):** bare `.` raised `ValueError` not `LexError` (AF-1).

**Re-verified after fix commit f40a364:**

```
Ran 21 tests in 0.000s — OK                                ✓
['NUMBER', 'PLUS', 'NUMBER', 'EOF']  (whitespace skipped)  ✓
tokenize('.')  → LexError: invalid number literal '.' at position 0  ✓
tokenize('1 @ 2')  → LexError: unexpected character '@' at position 2  ✓
```

Valid floats unaffected by fix: `.5` → `0.5`, `10.` → `10.0`, `3.5*(1-2)` correct.

---

## D4 — Tests Green: PASS @2026-06-15T04:40:18Z

```
Ran 21 tests in 0.000s
OK
```

21 tests (was 20; `test_bare_dot_raises_lex_error` added). All three required DoD examples covered and passing.

---

## Adversary findings

### AF-1 (CLOSED @2026-06-15T04:40:18Z): Bare `.` leaked `ValueError` instead of `LexError`

**Fix:** `lexer.py` now wraps `float(raw)` / `int(raw)` in try/except, re-raises as `LexError`. Test added.  
Re-tested: `tokenize('.')` now raises `LexError: invalid number literal '.' at position 0`. ✓  
_Closed by Adversary after re-test._