(j3.2006) co-array variable
Fri May 25 18:04:20 EDT 2007
Aleksandar Donev wrote:
>On Thursday 24 May 2007 17:45, Malcolm Cohen wrote:
>>...in that context, saying "scalar" achieves nothing. Arrays and
>>structures are comprised of scalars.
The phrase says (after replacing co-variable with co-array) "scalar
co-array". The examples Aleks has below are not co-arrays by either the
current or previous definition. However, with the new definition of
co-array, x(1) is a co-array. The original intent of [197:13-15] (the
result of considerable discussion and compromise) was to not allow array
elements or structure components in this context. Such things were not
co-arrays by the old definition, so the wording used to be correct.
This section was not updated when the definition of co-array was
expanded in paper 07-210. This was an oversight. I don't think
"co-array of rank zero" is materially different from "scalar co-array",
though Aleks' intent is correct. It's wordy, but I think we need
something like "scalar co-array with no subscripts or component
selection" as the replacement for "co-variable" on [197:13]. The
"co-variable" on [197:15] can be replaced by "it" to avoid repeating the
longer wording. The editor is welcome (as usual) to suggest better wording.
>I believe those words should say "co-array of rank zero" (I thought we had the
>term "co-scalar" for this but acroread does not find it). That is,
>should obey the normal segment ordering restrictions and not be given the
>"atomic read/write" exclusion.
Bill Long longb at cray.com
Fortran Technical Support & voice: 651-605-9024
Bioinformatics Software Development fax: 651-605-9142
Cray Inc., 1340 Mendota Heights Rd., Mendota Heights, MN, 55120
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