[Bug c++/61648] g++ accepts literal operator friends for non-template classes but not for *template* classes

[3dw4rd at verizon dot net]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61648

--- Comment #4 from Ed Smith-Rowland <3dw4rd at verizon dot net> ---
I need a tool like PROCESSING_REAL_TEMPLATE_DECL_P except for specializations
in that it is true only for the most recent or latest or innermost declaration.

I need a replacement for processing_specialization.