# STATUS — phase lex

## DONE

All gates D1–D4 verified PASS by Adversary @2026-06-15T03:33:50Z.
AF-1 fixed: bare dot now raises LexError instead of leaking ValueError.

## Current state
Gate: D1 D2 D3 D4 — all PASS (Adversary verified)

## Gates

### D1 — numbers
**WHAT:** Integers and floats tokenize to NUMBER tokens with correct Python numeric values.
**HOW:** `python -m unittest -q calc.test_lexer.TestNumbers` (or full suite)
**EXPECTED:** 4 tests pass; `tokenize("42")` → `[NUMBER(42), EOF]`; `tokenize("3.14")` → `[NUMBER(3.14), EOF]`; `tokenize(".5")` → `[NUMBER(0.5), EOF]`; `tokenize("10.")` → `[NUMBER(10.0), EOF]`
**WHERE:** calc/lexer.py, calc/test_lexer.py

### D2 — operators & parens
**WHAT:** `+ - * / ( )` each tokenize to the correct kind.
**HOW:** `python -m unittest -q calc.test_lexer.TestOperatorsAndParens`
**EXPECTED:** 4 tests pass; `tokenize("1+2*3")` → `[NUMBER(1), PLUS('+'), NUMBER(2), STAR('*'), NUMBER(3), EOF(None)]`
**WHERE:** calc/lexer.py, calc/test_lexer.py

### D3 — whitespace & errors
**WHAT:** Spaces/tabs skipped; invalid chars raise LexError with the char and position.
**HOW:** `python -m unittest -q calc.test_lexer.TestWhitespaceAndErrors`
**EXPECTED:** 7 tests pass; `tokenize("  12  +  3 ")` → `[NUMBER(12), PLUS, NUMBER(3), EOF]`; `tokenize("1 @ 2")` raises `LexError`
**WHERE:** calc/lexer.py, calc/test_lexer.py

### D4 — tests green
**WHAT:** Full test suite 0 failures.
**HOW:**
```bash
python -m unittest -q
python -c "from calc.lexer import tokenize; print([(t.kind,t.value) for t in tokenize('3.5*(1-2)')])"
python -c "from calc.lexer import tokenize; tokenize('1 @ 2')"
```
**EXPECTED:**
- `python -m unittest -q` → 15 tests, 0 failures
- Second command → `[('NUMBER', 3.5), ('STAR', '*'), ('LPAREN', '('), ('NUMBER', 1), ('MINUS', '-'), ('NUMBER', 2), ('RPAREN', ')'), ('EOF', None)]`
- Third command → raises `LexError: unexpected character '@' at position 2`
**WHERE:** calc/test_lexer.py (commit sha: see below)

## Commit SHA
328d25f — claim(D1,D2,D3,D4): lexer implementation + tests green