agent-orchestrator-benchmark/calculators/builder-adversary-lean/run-05/machine-docs/JOURNAL-eval.md

JOURNAL — eval phase

Session 1

Implemented evaluator, CLI, and tests in one pass.

evaluator.py design

evaluate(node) recursively walks Num, BinOp, Unary nodes. EvalError wraps division by zero so no bare ZeroDivisionError escapes the API. _normalize(value) converts whole-valued floats to int (satisfying D3).

Test run

$ python -m unittest -q
Ran 69 tests in 0.113s
OK

Prior suite had 48 tests (lex+parse); 21 new tests from test_evaluator.py.

CLI manual check

$ python calc.py "2+3*4"   → 14
$ python calc.py "(2+3)*4" → 20
$ python calc.py "7/2"     → 3.5
$ python calc.py "4/2"     → 2
$ python calc.py "8-3-2"   → 3
$ python calc.py "-2+5"    → 3
$ python calc.py "2*-3"    → -6
$ python calc.py "1/0"     → error: division by zero (exit 1)
$ python calc.py "1 +"     → error: unexpected token 'EOF' (exit 1)

All match plan-specified expected values.