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On Jan 9, 2010, at 12:09 PM, rpg400-l-request@xxxxxxxxxxxx wrote:
What is the problem with the current pre compiler design?
In a word - cost. Every compiler change has (to some degree) to be
implemented twice.
The current design requires that the pre-compiler (which comes from
the SQL team in Rochester) "understands" pretty much everything about
RPG. As a result it is very easy for it to get behind the compiler as
it did for many years - and still is to some degree.
The type of design that Hans refereed to - sometimes known as inner-
outer I believe - has the pre-compiler and the compiler interact much
more directly with the pre-compiler asking the compiler for
information rather than fully parsing the source itself. Similarly it
might pass back the "new" source to the compiler during the compile
phase.
This has all been discussed here before - check out the archives if
you want more detail.
Jon Paris
www.Partner400.com
www.SystemiDeveloper.com
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