From: Michael Selig <michael.selig@...>
Date: 2006-11-23T07:24:26+09:00
Subject: Re: type information

> - what i ve done till now is this
>     i ve collected the variables and stored them in the nodes  
> corresponding to each statement.
>
> a variable can be indexed using "ruby_scope->local_vars[node->nd_cnt]"
This is only for LOCAL variables.

> i tried to apply TYPE and CLASS_OF on this but it is giving same value  
> for all the variables no matter what type of the object it is holding

You really need to describe what you are trying to do in more detail.

What I *guess* is that you are looking at the "eval tree" before  
execution. In this case the variables will be all be undefined.
It is only when a variable is assigned a value that it will "have a class"  
- the class is associated with its value, not the variable. For example,
you could have the Ruby statement:

	x = 123

after which x will be a Fixnum. Then:

	x = "abc"

Now it will be a String.

So you really cannot create a static list of variables & their classes for  
a Ruby program.

I hope I guessed your motivation correctly!

Mike.