Checking variable scope

[Daniel Jacobowitz]

On Wed, Nov 29, 2006 at 10:44:33AM -0800, Jim Blandy wrote:
> I'm suggesting that you extend the grammar even further, by allowing
> one to say things like this (assume there is no binding for 'a' in
> scope, but there is a binding for 'b' in scope):
> 
> (gdb) print $in_scope(a)
> $1 = 0
> (gdb) print $in_scope(b)
> $1 = 1
> (gdb)

Is extending the grammar really necessary?  That will already parse;
it's the same as you'd use for a convenience variable named in_scope
holding a function pointer.

-- 
Daniel Jacobowitz
CodeSourcery