Re: How is the concept of scope implemented?

Tony wrote:
> ...
> That said, the question becomes: Is RTTI THE (uppercase) solution to the
> problem? Is the "problem" polymorphism? If that IS the problem that RTTI
> solves: I AM ALL EARS!!! (Because I have BIG issues with vptrs).


Tony, Tony, Tony.


Learn one thing at a time.


If you want to learn about how to implement scope, learn how to
implement scope. Download the source to a free Pascal compiler and see
how one implementation does it for a fairly straightforward language.


As you've correctly observed, C++ is complicated. If you want to learn
how some of that language is implemented, get an old copy of the
Annotated C++ Reference Manual. There are no new copies, because, as
far as I know, the book was never updated to reflect the latest version
of C++. Which is unfortunate, but there you are.


Reading source listings is how I learned what little I know about system
software -- compilers, operating systems, etc. When I was in high
school, we used a Burroughs B5500 at a local university, and us kiddies
got a hold of a copy of an ALGOL compiler listing. The compiler was
written in ALGOL. It was a single-pass compiler with a bounded context
recursive descent parser, and every time I looked through the listing, a
little more of it made sense.


So go find a Pascal compiler and see how it's done. Just be warned that
in my experience, once you do systems stuff, you'll never be truly happy
as an applications programmer again.


Louis

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