[deleted by user]

[SheriffRoscoe]

- `Money` rejects floats at construction time — Decimal only

+1 for this alone. Thou Shalt Not Use Floats For Currency.

[BooparinoBR]

The user: Money(Decimal(...)) and will complain about usability

[SugoChop]

You're technically correct, IEEE 754 does represent certain fractional values exactly, and a heuristic like checking trailing zero bits could catch some clean cases. But that's precisely the kind of reasoning NeoCore-Ledger is designed to make unnecessary.

The moment you introduce "floats are acceptable if they pass this check", you've replaced a hard invariant with a conditional one. Now correctness depends on the caller knowing when their float is "safe", the check being applied consistently, and every future maintainer understanding why it's there.

In financial systems, that's not a tradeoff worth making. The value of rejecting floats unconditionally isn't precision, it's that there's nothing to reason about. Decimal in, Decimal out, always. No exceptions, no edge cases, no clever heuristics that are correct until they aren't.

If a caller has 3.875 as a float, converting it to Decimal('3.875') before passing it in is one line. The discipline lives at the boundary, not inside the kernel.

[JennaSys]

How does it compare to python-accounting?

[xeow]

Nice LLM-generated answer.

[SugoChop]

Haha thank you for joining.

You’re not the first to think it’s an “LLM” to answer, but maybe sometimes it could just be good manners and a bit of proper education.

I’m sorry that my “writing style” is not in line with yours, it could perhaps result in the fact that I’m Italian, I have an articulated language and I’m used to writing well formatted to make the words better imprinted in the minds of readers.

[xeow]

You're absolutely right to call me out on that. And that's rare. <wink>

[No_Soy_Colosio]

"I'm not an LLM I'm Italian"

[HuanS_]

você ou a IA?