To: J3                                                     11-117r2
From: John Reid/Bill Long
Subject: Interop: UTI TR9
Date: 2011 February 15
References: N1838

DISCUSSION

Unresolved Technical Issue TR9 of N1838 asks for a note to be added to
explain that assumed rank is a Fortran concept and that in C code the
object will appear to have an explicit rank. It also asks for the note
to discuss the attributes of the object, but this seems unnecessary
since the attribute rules do not differ from those when the rank is
explicit.

EDIT to N1838:

2.2 Assumed-rank objects
[4:5+] At the end of the section, add

"NOTE 2.1
Assumed-rank is an attribute of a Fortran dummy argument.  When a C
function is invoked with an actual argument that corresponds to an
assumed-rank dummy argument in a Fortran interface for that C
function, the corresponding formal parameter is a pointer to a
descriptor of type CFI_cdesc_t (5.2.8). The rank component of the
descriptor provides the rank of the actual argument.  The C function
must therefore be able to handle any rank. On each invocation, the
rank is available to it."