[m-dev.] Just a few questions

[Tyson Dowd]

On 14-Sep-1998, Erwan Jahier <Erwan.Jahier at irisa.fr> wrote:
> 1) would it be easy to implement a primitive that retrieve the list of
> ancestors of the current predicate ? (I mean a primitive which go and
> look in an existing stack) Is this information always available ?

Stack traces are available in certain grades.
If you have execution tracing on they will be available.

> 3) Is there a full description of the informations contained in
> io__state somewhere (I mean, more information than in the file io.m) ?
> (I am looking for information that migth be usefull for the debugger)

io.m contains the full implementation as far as I know.

io__state isn't actually represented as a variable at runtime, so
any global state can be "stored" in it.