(j3.2006) C_PTR and C_FUNPTR

[Michael Ingrassia]

Does the standard actually require that C_PTR and C_FUNPTR be
*different* derived types?   Put another way, is the following code
guaranteed to be standard conforming:

        INTERFACE S
        SUBROUTINE S1(X)
        USE ISO_C_BINDING
        TYPE(C_PTR) :: X
        END SUBROUTINE S1
        SUBROUTINE S2(X)
        USE ISO_C_BINDING
        TYPE(C_FUNPTR) :: X
        END SUBROUTINE S2
        END INTERFACE
        END

As we all know, two types whose names are spelled differently aren't
necessarily different types in the general case.

            --Michael I.