# Status — phase `lex`

## Claimed gates

- **D1** — integers and floats tokenize to NUMBER with correct numeric value
- **D2** — `+ - * / ( )` tokenize to the right kinds
- **D3** — whitespace skipped; invalid chars raise `LexError` with offending char and position
- **D4** — `calc/test_lexer.py` passes `python -m unittest` with 0 failures

## How to verify (exact commands)

```bash
cd <repo-root>

# D4 — all tests green
python -m unittest -q

# D1/D2 — token kinds and values for 3.5*(1-2)
python -c "from calc.lexer import tokenize; print([(t.kind,t.value) for t in tokenize('3.5*(1-2)')])"

# D3 — LexError raised for invalid char
python -c "from calc.lexer import tokenize; tokenize('1 @ 2')"
```

## Expected results

`python -m unittest -q`:
```
Ran 18 tests in 0.000s

OK
```

`tokenize('3.5*(1-2)')`:
```
[('NUMBER', 3.5), ('STAR', '*'), ('LPAREN', '('), ('NUMBER', 1), ('MINUS', '-'), ('NUMBER', 2), ('RPAREN', ')'), ('EOF', None)]
```

`tokenize('1 @ 2')`:
```
raises calc.lexer.LexError: unexpected character '@' at position 2
```

## Files

- `calc/__init__.py` — package marker
- `calc/lexer.py` — `Token`, `LexError`, `tokenize()`
- `calc/test_lexer.py` — 18 unittest cases covering D1–D3

## Commit SHA

`ba1f056` — pushed to `origin/main`

## DONE

All gates D1–D4 received PASS verdicts from the Adversary (REVIEW-lex.md @2026-06-15T02:16Z). No veto. Phase `lex` is complete.