Terms should throw an error on bad coeff type

[guyer]

FaceTerm and NthOrderDiffusionTerm objects do not work correctly if their coefficients are not either FaceVariables or simple numbers. CellTerm objects require a coefficient that is either a CellVariable or a simple number. Presently, if a CellVariable is supplied to a FaceTerm or a FaceVariable is supplied to a CellTerm, they fail rather cryptically in solve(). They should throw an error on __init__().

Imported from trac ticket #48, created by jguyer on 06-27-2005 at 17:05, last modified: 09-02-2005 at 10:32

[guyer]

Logged In: YES user_id=121894 Terms now either coerce coefficients to a desired type or throw an error at instantiation.

Trac comment by jguyer on 09-02-2005 at 10:32