Re: Bison and C++

[Richard Stallman]

    When debugging takes place, one sees the original source code in the debug
    window (.c file in C), with an arrow pointing at the line where the PC
    (program counter) currently is.

M-x gdb in Emacs will do this for you.

    It keeps track of _all_ data relevant for debugging for you.
    Thus, one never has to write down which variables to debug.

Could you be more specific?  What is the feature you would like?  What
information is in this data?  I am having trouble understanding what
you've said.

     For debugging
    C++ code, I have found it especially important that one can follow the
    dynamic type of a polymorphic pointer -- without that feature, it is rather
    hopeless trying to debug massively dynamic data.

I am not completely sure what this means, since I don't use C++.  But
it could be an important feature for us to add.  Could you be more
specific?

I have a feeling this feature is not related specifically to Bison,
but rather a more general issue about C++ (and maybe other languages),
and supporting the general feature will automatically take care of
Bison.