Re: How is the concept of scope implemented?

"Ray Dillinger" <bear@sonic.net> wrote in message
< ...
> In most languages, scope rules require the variable name, the function
> name, and a unique identifier for the activation frame. In C and C++,
> however (and a few other languages) you also need the code address of
> the reference, because the baroque scoping rules include variables whose
> scope is a smaller unit than a full function.
>
> Hope that helps.


Yes it does, especially the last paragraph. It seems that scope is a very
very key concept of a language. If I was building a toolkit to implement
languages with (I wish there was such a thing, btw), there would be data
structures/mechanisms/algorithms to make scope "a first class citizen", so
to speak. From one of the other replies, a potential starting point for the
aforementioned could be having separate symbol tables per each scope. Or at
least hierarchial ones per "major" (translation unit?) scope.


Tony

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