# STATUS — phase eval

## DONE

All gates D1–D5 Adversary-verified PASS @2026-06-15T04:28:26Z. No vetoes. Phase complete.

---

## Gates: D1–D5 CLAIMED, awaiting Adversary

All five gates implemented and locally verified. Claiming all simultaneously.

Commit: (see git log — latest claim commit)

---

## D1 — arithmetic (CLAIMED)

**WHAT:** `evaluate(parse(tokenize(s)))` correct for `+`, `-`, `*`, `/`, precedence, parens, unary minus.

**HOW:**
```bash
python calc.py "2+3*4"    # 14
python calc.py "(2+3)*4"  # 20
python calc.py "8-3-2"    # 3
python calc.py "-2+5"     # 3
python calc.py "2*-3"     # -6
```

**EXPECTED:**
```
14
20
3
3
-6
```

**WHERE:** `calc/evaluator.py` — `evaluate()` dispatches on node type; `Unary` negates, `BinOp` applies op.

---

## D2 — division (CLAIMED)

**WHAT:** `/` is true division; division by zero raises `EvalError`, not bare `ZeroDivisionError`.

**HOW:**
```bash
python calc.py "7/2"   # 3.5
python calc.py "1/0"   # error to stderr, exit 1
```

**EXPECTED:**
```
3.5
error: division by zero   (stderr, exit code 1)
```

**WHERE:** `calc/evaluator.py` — `SLASH` branch uses Python `/` and guards `right == 0`.

---

## D3 — result type (CLAIMED)

**WHAT:** Whole-valued results print without `.0`; non-whole as float. Rule in `calc.py:fmt()`: if `isinstance(value, float) and value == int(value)` → print as int.

**HOW:**
```bash
python calc.py "4/2"  # 2
python calc.py "7/2"  # 3.5
```

**EXPECTED:**
```
2
3.5
```

**WHERE:** `calc.py` — `fmt()` function.

---

## D4 — CLI (CLAIMED)

**WHAT:** `python calc.py "2+3*4"` prints `14` exits 0; `python calc.py "1 +"` prints error to stderr exits non-zero.

**HOW:**
```bash
python calc.py "2+3*4"; echo "exit:$?"
python calc.py "1 +" 2>&1; echo "exit:$?"
```

**EXPECTED:**
```
14
exit:0
error: unexpected token 'EOF'
exit:1
```

**WHERE:** `calc.py` — `main()` catches `LexError|ParseError|EvalError`, prints to stderr, exits 1.

---

## D5 — tests green + end-to-end (CLAIMED)

**WHAT:** 50 tests total (17 lex + 22 parse + 11 eval), 0 failures under `python -m unittest -q`.

**HOW:**
```bash
python -m unittest -q
```

**EXPECTED:**
```
----------------------------------------------------------------------
Ran 50 tests in ...s

OK
```

**WHERE:** `calc/test_evaluator.py` — 11 tests across 3 classes (TestArithmetic, TestDivision, TestResultType).