Peter Hercek wrote:
Daniil Elovkov wrote:
A refinement of :tracelocal could be :tracedirect (or something) that
would save the history not anywhere within the given function but only
within parents, so to say. For example,
This looks like what I thought of as searching for values in dynamic
stack (explained in my response to Pepe Iborra in this thread).
Yes, first when I saw that your message I also thought "Hey, Peter has already
suggested it!" :)
But now I see that we're talking about slightly different things. Consider
fun x y =
let f1 = ... (f2 x) ... -- f1 calls f2
f2 = exp_f2
in ...
Now, if we're at exp_f2 then 'dynamic stack' in your terminology includes (f2
x) since it's the caller and all f1 as well.
On the other hand, :tracedirect that I suggested would not include f1, as it's
not a direct ancestor. And for the purpose of binding variables which are
syntactically in scope, it is indeed not needed. :tracedirect would be
sufficient.
Also, I think that :tracedirect can be easily implemented based only on simple
syntactic inclusion relation.
I just did not ask for it with a new ticket since:
* I think it is already requested by some other ticket
* if you compile with -Wall then :tracelocal should have the same
information and only rarely name collision happens so automatic
tracelocal trace search should return what you are looking for
too and when needed it reruns more ... that is if the function
is short enough to fit in the tracelocal history queue
The ticket actually has two almost independent parts:
* Adding tracelocal trace.
* Adding the automatic search for symbols in the trace and
the trace in the search could be also some other kind of
trace like (e.g. dynamic stack). This would not be that
useful though since the names at higher levels in stack
are typically different. So to make it good it would
require matching formal arguments to expressions on
higher level and evaluating them, not that easy to do
as simple tracelocal search which is just based on stupid
string comparison.
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