Re: [Patch, fortran] PR108663 - Accepts invalid bug with pdtXXX

On 2/14/26 9:28 AM, Paul Richard Thomas wrote:
> Hello All,
> 
> This bug allowed direct references by name to PDT instances. It took
> me a long time to have the necessary light bulb moment: The names of
> PDT instances never have to go through the scanner and so are not
> subject to the ministrations of gfc_wide_tolower. Therefore, rendering
> all the letters of the PDT prefix in upper case prevents pdt_types
> from being directly referenced in code.
> 
> I took the opportunity to define PDT_TEMPLATE and PDT_TEMPLATE_LEN in
> gfortran.h.
> 
> The chunk in resolve.cc is a funny one. I had previously encountered
> the test for assumed LEN parameters in typebound procedure dummies
> (pdt_37.f03) failing due to apparently unrelated changes in the
> frontend. It seems that it is the order of appearance of pdt_templates
> and pdt_types that mattered. The problem is fixed by testing for both,
> as is necessary for this patch to pass regression testing.
> 
> Regtests OK with FC43/x86_64. OK for mainline? I will be offline for a
> few weeks from Monday evening and so I will push the patch then if it
> hasn't been reviewed. In the words of Hitchhikers Guide to the Galaxy,
> it is "mostly harmless".
> 
> Paul

OK for mainline Paul, thanks.

Jerry