[J3] Polymorphic C_LOC actual argument pointer-associated with an interoperable type: conforming?

Bill Long longb at cray.com
Wed May 23 14:23:24 EDT 2018

> On May 22, 2018, at 9:02 PM, Malcolm Cohen via J3 <j3 at mailman.j3-fortran.org> wrote:
> (both C_F_POINTER and C_LOC effectively prohibit polymorphic arguments)

C710 seems to allow assumed-type arguments to C_LOC() [a special case that was intentionally allowed], and an assumed-type entity is an unlimited polymorphic entity.  Whereas the specification for C_LOC() in clause 18 seems to disallow polymorphic arguments.   Would Damian’s program be conforming if the CLASS(*) declarations are changed to TYPE(*)?


Bill Long                                                                       longb at cray.com
Principal Engineer, Fortran Technical Support &   voice:  651-605-9024
Bioinformatics Software Development                      fax:  651-605-9143
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