ref: 254b07675e1a5348f2a8723f55e6b5b1b18a4721
dir: /appl/cmd/disk/prep/calc.tab.m/
Calc: module {
parseexpr: fn(s: string, a, b, c: big): (big, string);
init: fn(nil: ref Draw->Context, nil: list of string);
NUMBER: con 57346;
UNARYMINUS: con 57347;
};