(j3.2006) Chaining type-bound procedure references

[Tom Clune]

On May 2, 2014, at 2:52 PM, Van Snyder <Van.Snyder at jpl.nasa.gov> wrote:

> On Fri, 2014-05-02 at 01:00 -0400, Rafik Zurob wrote:
>> val = x%foo()%bar()
>> 
>> would require a temp pointer
>> 
>> temp_ptr_dscr => x%foo()
>> val = temp_ptr_dscr%bar()
> 
> I don't understand how that is inferior to a user-declared temp pointer.

My understanding is that Rafik's concern was the following.

If the user creates the temp, then it is on _them_ to decide if the temp is still valid for later references.  If the compiler creates it, then the _compiler_ must ensure that no side-effects change the temp between uses.

- Tom


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Thomas Clune, Ph. D. 					<Thomas.L.Clune at nasa.gov>
CISTO	Code 606.0
NASA GSFC								301-286-4635
MS 610.8 B33-C128
Greenbelt, MD 20771






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