Iif compile-time return value

[fxm]

Yes, it was that I wrote before my last documentation update (suppressing all details related to the case of a constant as condition):

When IIf treats expressions of mixed numeric types:

• - if the condition is resolved at compile-time:
  • - the result type is that of the expression satisfying the condition,
  - if the condition can only be solved at run-time:
  • - if at least one expression is of floating-point type, the result type is the floating-point type (the bigger in case of two floating-point types),
    - if the two expressions are of integer types, the result type is the bigger type of both (see Coercion and Conversion for the precise ranking of integer types).