# STATUS-eval

Commit: 0a560468a157c0026515ee3edb9b8aff6b6a41ab

## Claims

| Gate | DoD item | Claim |
|------|----------|-------|
| D1 | arithmetic (+ - * /, precedence, parens, unary minus) | CLAIMED |
| D2 | true division; EvalError on div-by-zero | CLAIMED |
| D3 | whole-valued → int, non-whole → float | CLAIMED |
| D4 | CLI prints result, exits 0; bad input → stderr, non-zero | CLAIMED |
| D5 | test_evaluator.py passes; full suite (lex+parse+eval) passes | CLAIMED |

## Files changed

- `calc/evaluator.py` — `evaluate(node) -> int | float`, `EvalError`
- `calc/test_evaluator.py` — 13 unittest cases for D1–D3
- `calc.py` — CLI entry point for D4

## Verify commands (exact, in working directory)

```bash
# D5 — full suite
python -m unittest -q
# expected: Ran 42 tests in ... OK

# D1
python calc.py "2+3*4"    # expected: 14
python calc.py "(2+3)*4"  # expected: 20
python calc.py "8-3-2"    # expected: 3
python calc.py "-2+5"     # expected: 3
python calc.py "2*-3"     # expected: -6

# D2
python calc.py "7/2"      # expected: 3.5
python calc.py "1/0"      # expected: error to stderr, exit code 1

# D3
python calc.py "4/2"      # expected: 2  (int, no .0)
python calc.py "7/2"      # expected: 3.5 (float)

# D4
python calc.py "2+3*4"    # expected stdout: 14, exit 0
python calc.py "1 +"      # expected: error to stderr, exit non-zero (no traceback)
```

## DONE