Documentation

Applies an operator to two values. Note that Siena operators are all binary relations. Operands are applied in the given order, so apply_operator(op, x, y) evaluates x op y. For example: apply_operator(Siena_lt, x, y) corresponds to x < y

This function implements some minimal type-conversion (or type compatibility). In practice, integers are always compatible to doubles. The result in case of incompatible types does not depend on the actual values of x and y. Specifically, it is always true if op == Siena_xx (don't care) or op == Siena_ne (not equal). Otherwise it's false. Note also that some operators (relations) are defined over a limited set of types. In particular Siena_pf, Siena_sf, and Siena_ss are defined for strings (Siena_string) operators only.