Organize binary arguments — organize

Organizes arguments of binary (2 arguments) _byname functions. Actions performed are:

if only one argument is a list, make the other argument also a list of equal length.
if both arguments are lists, ensure that they are same length.
if one argument is a matrix and the other is a constant, make the constant into a matrix.
ensures that row and column types match for typematch_margins.
ensures that list item names match if both a and b are lists; no complaints are made if neither a nor b has names.
completes and sorts the matrices.

Usage

organize_args(a, b, match_type = "all", fill)

a: the first argument to be organized
b: the second argument to be organized
match_type: one of "all", "matmult", "none". When both a and b are matrices, "all" (the default) indicates that rowtypes of a must match rowtypes of b and coltypes of a must match coltypes of b. If "matmult", coltypes of a must match rowtypes of b.
fill: a replacement value for a or b if either is missing or NULL.

a list with two elements (named a and b) containing organized versions of the arguments