# STATUS — phase lex

## Gates

### D1 — numbers
**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)]` ✓

Also verified: `3.14` → `NUMBER(3.14)` (float), `.5` → `NUMBER(0.5)` (float), `10.` → `NUMBER(10.0)` (float).

### D2 — operators & parens
**Command:** `python -c "from calc.lexer import tokenize; print([(t.kind,t.value) for t in tokenize('1+2*3')])"`
**Expected:** NUMBER PLUS NUMBER STAR NUMBER EOF
**Observed:** `[('NUMBER', 1), ('PLUS', '+'), ('NUMBER', 2), ('STAR', '*'), ('NUMBER', 3), ('EOF', None)]` ✓

### D3 — whitespace & errors
**Command (whitespace):** `python -c "from calc.lexer import tokenize; print([(t.kind,t.value) for t in tokenize('  12  +  3 ')])"`
**Observed:** `[('NUMBER', 12), ('PLUS', '+'), ('NUMBER', 3), ('EOF', None)]` ✓

**Command (LexError):** `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` ✓

### D4 — tests green
**Command:** `python -m unittest -q`
**Expected:** 0 failures
**Observed:**
```
----------------------------------------------------------------------
Ran 13 tests in 0.001s

OK
```
✓

**Complex expression check:**
**Command:** `python -c "from calc.lexer import tokenize; print([(t.kind,t.value) for t in tokenize('3.5*(1-2)')])"`
**Observed:** `[('NUMBER', 3.5), ('STAR', '*'), ('LPAREN', '('), ('NUMBER', 1), ('MINUS', '-'), ('NUMBER', 2), ('RPAREN', ')'), ('EOF', None)]` ✓

## DONE