(j3.2006) Suggestion for Fortran 201x: Adding support for ignoring the TKR of the actual argument

Bill Long longb
Fri Mar 1 18:01:18 EST 2013

On 2/28/13 4:49 PM, Tobias Burnus wrote:
> Several compilers support some option to allow for the Fortran
> equivalent to C's "void *buffer" using a directive such as:
>     !DIR$ IGNORE_TKR buf
>     !IBM* IGNORE_TKR buf
> There is unfortunately no way to do this in standard Fortran. The
> closest are:
> * TYPE(*), DIMENSION(*) - which doesn't allow for scalars but only
> arrays and array elements

TYPE(*) works for scalars (no dimension...).  If you have only one of 
the buffer arguments (which is typical) the you can make the routine 
generic, with one argument scalar and the other an array.  And give both 
specifics the same binding name (of the C function that will accept 
either).  It is sort of involved, but does not involve any modifications 
to the standard.


> * TYPE(*), DIMENSION(..) - which not only passes the address of the data
> but the full array descriptor
> Thus, something like dimension(**) could be useful, which works like
> dimension(*) but also accepts scalars.
> Tobias
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Bill Long                                           longb at cray.com
Fortran Technical Support    &                 voice: 651-605-9024
Bioinformatics Software Development            fax:   651-605-9142
Cray Inc./Cray Plaza, Suite 210/380 Jackson St./St. Paul, MN 55101

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