The Machines · Runtime stack

seedmoney

A reckoner seed: money's exact currency — machines/seeds/seedmoney.shoddy

Summary

seedmoney bridges money's exact currency — amounts kept to the cent, with no rounding drift:

• MONEY builds a MONEY cell from a NUMBER of dollars.
• MADD and MSUB name the same arithmetic the engine core's polymorphic + and - (one word, working across several cell types) already give money cells. They exist for a dictionary that wants to say what it means.
• MSPLIT allocates a MONEY into n parts without losing a penny.
• MFMT is the exact string RckShow already renders a MONEY cell as, for a program that wants the text itself rather than the display.

Why It's Useful

A calculator that only ever prints its own display cannot hand a formatted total to another word — a report line, a saved file, a concatenated string. MFMT is that seam. It is the same rendering RckShow uses, handed back as an ordinary value.

User's Guide

Let st0 = RckSeedMoney(RckNew())
RckEval(st0, "1234.56 MONEY")        ' x: $1,234.56
RckEval(st0, "MFMT")                 ' x: "$1,234.56"
RckEval(st0, "1234.56 MONEY 3 MSPLIT")   ' x: { $411.52 $411.52 $411.52 } — no penny lost

Word Reference

Word	Description
MONEY ( x -- money )	x dollars, as exact currency to the cent.
MADD ( a b -- a+b )	Two MONEY cells added exactly.
MSUB ( a b -- a-b )	Two MONEY cells subtracted exactly.
MSPLIT ( m n -- list )	m divided into n MONEY shares, no penny created or lost; refuses a share count below one.
MFMT ( money -- s )	A MONEY cell formatted as text, e.g. $1,234.56.

Who Uses It

	User	How
	halifax	MONEY, MSPLIT and MFMT — exact cents at the prompt, and a split that conserves the penny.
	sparky	Sparky folds it too, so a model calling eval reaches the same words halifax puts at a prompt.

A mill claims this seed by folding RckSeedMoney over its reckoner state, which is all halifax does.

The Machines It Uses

	Machine	Why
	cuttle	The CutMoney case every word here reads and answers.
	money	The domain this seed bridges: Dollars, MoneyAdd, MoneySub, MoneySplit and MoneyFmt.
	reckoner	RckReg, RckSeeding and the argument readers every registered word is built from.