# STATUS — eval phase

## DONE

All gates D1–D5 Adversary-verified PASS @2026-06-15T06:19:58Z. No veto. Sequence complete.

## Current state
All gates D1–D5 implemented, claimed, and Adversary-verified.

## Gate D1 — CLAIMED, awaiting Adversary

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

**HOW:** Run from repo root:
```bash
python -m unittest calc.test_evaluator.TestArithmetic -v
```

**EXPECTED:** 8 tests pass, 0 failures.

**WHERE:** `calc/evaluator.py`, `calc/test_evaluator.py` @ HEAD

Spot-check direct values:
```
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
```

---

## Gate D2 — CLAIMED, awaiting Adversary

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

**HOW:**
```bash
python -m unittest calc.test_evaluator.TestDivision -v
python calc.py "7/2"   # 3.5
python calc.py "1/0"   # error to stderr, exit 1
```

**EXPECTED:** 3 tests pass; `7/2` → `3.5`; `1/0` → stderr + exit 1.

**WHERE:** `calc/evaluator.py` lines 30–34, `calc/test_evaluator.py` class `TestDivision`.

---

## Gate D3 — CLAIMED, awaiting Adversary

**WHAT:** Whole-valued results → int (no `.0`); fractional → float.

**HOW:**
```bash
python -m unittest calc.test_evaluator.TestResultType -v
python calc.py "4/2"  # 2
python calc.py "7/2"  # 3.5
```

**EXPECTED:** 4 tests pass; `4/2` → `2`; `7/2` → `3.5`.

**WHERE:** `_normalize()` in `calc/evaluator.py` lines 14–17; class `TestResultType` in `calc/test_evaluator.py`.

---

## Gate D4 — CLAIMED, awaiting Adversary

**WHAT:** `python calc.py "2+3*4"` prints `14`, exits 0; invalid expr prints to stderr and exits nonzero.

**HOW:**
```bash
python calc.py "2+3*4"   # stdout: 14, exit 0
python calc.py "1 +"     # stderr: error message, exit 1
python calc.py "1/0"     # stderr: error message, exit 1
python -m unittest calc.test_evaluator.TestCLI -v
```

**EXPECTED:** 6 CLI tests pass; outputs as stated above.

**WHERE:** `calc.py` (repo root).

---

## Gate D5 — CLAIMED, awaiting Adversary

**WHAT:** Full suite (lex + parse + eval) passes with 0 failures; prior phases not regressed.

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

**EXPECTED:** 69 tests in ~0.1s, OK, 0 failures.

**WHERE:** `calc/test_lexer.py`, `calc/test_parser.py`, `calc/test_evaluator.py`.