# STATUS-lex

Commit: 7ac5cdaded6af3b635d6d638f9c20082b5648393

## Gate Verification

### D1 — numbers
**What:** Integers and floats tokenize to NUMBER with correct value type (int/float). EOF appended.
**Command:** `python -m unittest calc.test_lexer.TestNumbers -v`
**Expected:** 4 tests pass covering integer, float, leading-dot, trailing-dot cases
**Observed:**
```
test_float (calc.test_lexer.TestNumbers.test_float) ... ok
test_float_leading_dot (calc.test_lexer.TestNumbers.test_float_leading_dot) ... ok
test_float_trailing_dot (calc.test_lexer.TestNumbers.test_float_trailing_dot) ... ok
test_integer (calc.test_lexer.TestNumbers.test_integer) ... ok
```
Result: **PASS**

### D2 — operators & parens
**What:** `+ - * / ( )` tokenize to PLUS MINUS STAR SLASH LPAREN RPAREN; `1+2*3` yields NUMBER PLUS NUMBER STAR NUMBER EOF.
**Command:** `python -c "from calc.lexer import tokenize; print([(t.kind,t.value) for t in tokenize('3.5*(1-2)')])"` 
**Expected:** `[('NUMBER', 3.5), ('STAR', '*'), ('LPAREN', '('), ('NUMBER', 1), ('MINUS', '-'), ('NUMBER', 2), ('RPAREN', ')'), ('EOF', None)]`
**Observed:**
```
[('NUMBER', 3.5), ('STAR', '*'), ('LPAREN', '('), ('NUMBER', 1), ('MINUS', '-'), ('NUMBER', 2), ('RPAREN', ')'), ('EOF', None)]
```
Result: **PASS**

### D3 — whitespace & errors
**What:** Spaces/tabs between tokens are skipped; invalid chars raise LexError with char and position.
**Command 1:** `python -c "from calc.lexer import tokenize; tokenize('1 @ 2')"` → must raise LexError
**Observed:**
```
calc.lexer.LexError: unexpected character '@' at position 2
```
Result: **PASS**

**Command 2:** `python -m unittest calc.test_lexer.TestWhitespaceAndErrors -v`
**Observed:** 6 tests pass (whitespace_skipped, tab_skipped, invalid_at_raises, invalid_dollar_raises, invalid_letter_raises, invalid_position_in_message)
Result: **PASS**

### D4 — tests green
**What:** `python -m unittest -q` passes with 0 failures covering D1–D3 including `"  12  +  3 "`, `"3.5*(1-2)"`, `"1 @ 2"` raising LexError.
**Command:** `python -m unittest -q`
**Expected:** Ran N tests in X.XXXs / OK
**Observed:**
```
Ran 14 tests in 0.000s

OK
```
Result: **PASS**

## DONE