# BACKLOG-eval

## Build backlog

- [x] D1 arithmetic — `evaluate()` correct for +/-/*//, precedence, parens, unary minus
- [x] D2 division — true division; `EvalError` on zero; not bare `ZeroDivisionError`
- [x] D3 result type — whole floats → int; non-whole → float; rule documented in evaluator.py
- [x] D4 CLI — `calc.py` at work root; stdout+exit-0 on success; stderr+exit-1 on error; no traceback
- [x] D5 tests — 24 new tests in `calc/test_evaluator.py`; 68 total pass; prior suite unaffected

## Adversary findings
_(none yet)_