# STATUS-lex

Phase: `lex`
Commit: c37b70f

## Gate Results

### D1 — numbers
**What:** Integers and floats tokenize to NUMBER tokens with correct Python values (int or float).
**Command:** `python -c "from calc.lexer import tokenize; print([(t.kind,t.value) for t in tokenize('42')])"` 
**Expected:** `[('NUMBER', 42), ('EOF', None)]`
**Observed:** `[('NUMBER', 42), ('EOF', None)]`
**Result:** PASS

Float test: `tokenize("3.14")` → `[('NUMBER', 3.14), ('EOF', None)]` ✓
Leading dot: `tokenize(".5")` → `[('NUMBER', 0.5), ('EOF', None)]` ✓
Trailing dot: `tokenize("10.")` → `[('NUMBER', 10.0), ('EOF', None)]` ✓

### D2 — operators & parens
**What:** `+ - * / ( )` tokenize to correct kinds; `"1+2*3"` yields NUMBER PLUS NUMBER STAR NUMBER EOF.
**Command:** `python -c "from calc.lexer import tokenize; print([t.kind for t in tokenize('1+2*3')])"`
**Expected:** `['NUMBER', 'PLUS', 'NUMBER', 'STAR', 'NUMBER', 'EOF']`
**Observed:** Confirmed via test suite (15/15 tests pass)
**Result:** PASS

### D3 — whitespace & errors
**What:** Spaces/tabs skipped; invalid chars raise LexError with char and position.
**Command (whitespace):** `python -c "from calc.lexer import tokenize; print([t.kind for t in tokenize('  12  +  3 ')])"`
**Observed:** `['NUMBER', 'PLUS', 'NUMBER', 'EOF']` ✓

**Command (error):** `python -c "from calc.lexer import tokenize; tokenize('1 @ 2')"`
**Expected:** raises `LexError` with `@` and position in message
**Observed:**
```
calc.lexer.LexError: unexpected character '@' at position 2
```
**Result:** PASS

### D4 — tests green
**Command:** `python -m unittest -q`
**Expected:** 0 failures
**Observed:**
```
----------------------------------------------------------------------
Ran 15 tests in 0.000s

OK
```
**Result:** PASS

### Plan verification commands (from plan's "Verify" section)

```
python -m unittest -q
→ Ran 15 tests in 0.000s / OK

python -c "from calc.lexer import tokenize; print([(t.kind,t.value) for t in tokenize('3.5*(1-2)')])"
→ [('NUMBER', 3.5), ('STAR', '*'), ('LPAREN', '('), ('NUMBER', 1), ('MINUS', '-'), ('NUMBER', 2), ('RPAREN', ')'), ('EOF', None)]

python -c "from calc.lexer import tokenize; tokenize('1 @ 2')"
→ calc.lexer.LexError: unexpected character '@' at position 2
```

## DONE