(j3.2006) J3/09-292 - J3 Fortran interp letter ballot #19 - due 19-Oct-2009

Jim Xia jimxia
Thu Oct 15 10:55:25 EDT 2009


The following Fortran interpretations are being balloted:

Yes  No   Number     Title

-Y-  ---  F95/0098   Are dummy functions returning assumed-length
                      character legal?
-Y-  ---  F03/0022   Coexistence of IEEE and non-IEEE kinds
-Y-  ---  F03/0024   DEALLOCATE and array pointers
-Y-  ---  F03/0034   IEEE_LOGB()
-Y-  ---  F03/0039   HYPOT()
-Y-  ---  F03/0078   IEEE_SUPPORT_DATATYPE vs. mathematical equivalence
-C-  ---  F03/0090   Polymorphic array constructors
-Y-  ---  F03/0130   Elemental specific intrinsic procedure
                      characteristics
-Y-  ---  F03/0131   SAVE attribute and EQUIVALENCE
-Y-  ---  F03/0132   Unformatted i/o and private components
-C-  ---  F03/0133   Is unlimited polymorphic allowed in COMMON?
-Y-  ---  F03/0134   Implicit typing of procedure pointers
-Y-  ---  F03/0135   Interaction between RESULT, recursion, and host
                      generic
-C-  ---  F03/0136   Are subroutines distinguishable from arrays?
-Y-  ---  F03/0137   Dummy procedure type compatibility
-Y-  ---  F03/0138   External <procedure-name> as <proc-target>

The text of these interpretations is attached.  Each interpretation
starts with a row of "-"s.

Please mark the above -Y- in the Yes column for "yes", -C- in the Yes
column for "yes with comment", or -N- in the No column for a "no"
answer {be sure to include your reasons with "no"} and send only the
above text {not this entire mail message} with any comments to

        j3 at j3-fortran.org


---------------------------------------------------------------------------
Comment on F03/090

I believe an array constructor that returns a polymorphic data type could 
be
a useful feature to general Fortran users.  It is a very convinent way to 
"paste"
an arbitrary number of entities (of any shapes) into a rank one array.

It would be much more difficult to achieve the same effect following the 
suggested method of using allocatable array functions because one can not 
write
a general function to accept arbitrary number of dummy arguments of 
arbitrary
shapes.

There are also no technical difficulties to specify or implement this 
feature.
All required is a rule that all entities within an array constructor 
should have
the same declared type and dynamic type.
---------------------------------------------------------------------------
Comment on F03/0133

We should also prohibit the unlimited polymorphic pointers in BLOCK DATA.
---------------------------------------------------------------------------
Comment on F03/0136

There seems an error in the 2nd example in that "Subroutine aprint(af)" 
should be
declared as "Subroutine aprint(af,n)".



Cheers,



Jim Xia

XL Fortran Compiler Test
IBM Toronto Lab at 8200 Warden Ave, Markham, On, L6G 1C7
Phone (905) 413-3444  Tie-line 313-3444
email: jimxia at ca.ibm.com
D2/YF7/8200 /MKM

http://www.ibm.com/software/awdtools/fortran/xlfortran
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