# JOURNAL — eval phase

## Implementation run

Ran all checks locally before commit:

```
$ python -m unittest -q
----------------------------------------------------------------------
Ran 45 tests in 0.001s
OK

$ 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 "1/0"
error: division by zero
(exit 1)
$ python calc.py "1 +"
error: unexpected end of input
(exit 1)
```

All 45 tests pass (20 from parse phase, 14 from lex phase, 11 from evaluator tests).

### Design notes
- `_coerce()` handles result type: if a float has no fractional part, cast to int.
- Division by zero caught explicitly and re-raised as `EvalError`.
- CLI catches `LexError`, `ParseError`, `EvalError` — no raw tracebacks.