The OpenD6 Table-Top Role-Playing Game (TTRPG) has a complicated bit of accounting around the definition for magical spells and invocations. For me, the accounting suggested a need for software tools. This -- in turn -- forced me to invent a Domain-Specific Language (DSL) to work with OpenD6 spells.

I like the OpenD6 …

See The eval() Conundrum for background. Also, see https://github.com/slott56/writing-tools.

Permit me a long story about budgeting and a language to describe magic. The story leaves footprints that reveal the impossibility of making the right design choices up front.

Many people will proclaim that the eval() function is reprentnatly evil.

Feel free to skip the two rants.

A "Dice Mechanic"? Yes. The thing you do with the dice to determine an outcome. We'll use Python to see how the dice shake out.

Let's reach way, way back. 1989 - 1990. This will let me talk about OO programming and Python Type Hints. (really) And doing OO design for things that are as pervasive (and transparent) as air. Things that need to be part of a design, but don't appear in any documentation.

In …