[RFA] Updated path expression computations for varobj trees

[Keith Seitz]

On 12/20/2011 07:23 AM, Tom Tromey wrote:
> I'm not super fond of the type regexp thing, but I suppose we can always
> enhance it more later if need be.

Ok, well, after fiddling with this far too much, I've (almost 
embarrassingly) whittled this regexp to:

+    if {[string index $name 0] == "*"} {
+      set is_compound 0
+    }

In other words, we assume that the construct is a compound type unless 
the child's name begins with "*", which means the parent must be a pointer.

We may encounter difficulties with this, too, mind you, but I believe 
this is a cheaper and easier condition to deal with than the regexp.

What do you think?

Keith

[Re-attaching whole patch for clarity. ChangeLog is still the same.]
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