createMosaicFunction
processes an expression and
assignments to produce an object containing function and
other information used by D, antiD, and plotFuncreateMosaicFunction(sexpr = NULL, ...)
createModaicFunction
underlies was going to be
used to to undrly user functions such as makeFun
,
plotFun
, and D
, but it looks like we have
another solution for this coming.