[m-rev.] Add a listing facility to mdb

[Ian MacLarty]

On Sun, 23 Oct 2005, Ralph Becket wrote:

> Ian MacLarty, Saturday, 22 October 2005:
> > All the code in the browser directory is not traced, even in debug grades,
> > so that shouldn't be a problem.
>
> Hmm, that's odd.  I don't understand why I saw this problem then.
>

Were you calling a library predicate like foldl?  The library doesn't have
tail recursion optimization in the debug grades, just the browser directory.

> > > +:- pragma foreign_type("C", c_file_ptr, "FILE *", [can_pass_as_mercury_type]).
> >
> > There's no need to define a new type, you can use io.output_stream.
>
> There is: a Mercury IO stream is not the same as a FILE *, which is what
> MR_mdb_{out,err} are.
>

Yes I see what you mean.  The other debugger code, however, does just use
io.output_stream and works fine.  Not sure why yet -- I'll have to
investigate further.

Ian.


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