Re: How is the concept of scope implemented?

On Nov 14, 12:40 pm, "Tony" <t...@my.net> wrote:
> In C++, there is many kinds of scope: global, translation unit, function,
> local (between the curly brackets within a function), class and probably
> more. How is the concept of scope implemented by a compiler for a program?
>
> Tony


For static variables.
The same way as for C -a tree of stacks. The scope in which you are
executing shows the node where you are present in the tree, If a
symbol is not found within a node, you look above (in the enclosing
scope) till you hit the root node.


For member functions/variables,
  there is something called RTTI (run-time type identification) where
the C++ runtime library resolves scope at runtime and enables you to
call the appropriate member function. The instance of class which is
used to call a member function is represented by an implicit pointer
(this) and that is used to access variables when a member function
accesses them.


Hope this answers your question.


regards
-kamal


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