[Fwd: [Fwd: GCC tree access]]

["Jeffrey Richardson" <jlrichardson at link dot com>]

Jeff Richardson wrote:

> Jeff Richardson wrote:
>
> > Hello,
> >
> > I am interested in developing a combination "intelligent editor" and
> > source browser using the tree structure created internally by GCC, as
> > described in the article on trees in the GCC Internals manual.
> >
> > I see the example "process_stmt" function in the article on Function
> > Bodies.  I also see the function "expand_stmt" in the file c-semantics.c
> > which is called by a number of functions including several genrtl_
> > functions, and the c_expand_body function.  The c_expand_body function
> > is in turn called from several places including finish_function in
> > c-decl.c.
> >
> > My question is this:  if I write my own version of "precess_stmt" which
> > uses the macros to access various tree information and write it out to a
> > file, where is the best place to call my function?  Can it be called
> > from a single location (such as finish_function), and still have access
> > to the full tree structure?
> >
> > Also, what is the "permanence" of the tree structure.  As a source file
> > is parsed, and the tree structure is constructed, is there a point at
> > which branches of the tree are discarded because they are no longer
> > needed (e.g. when a function has been completed), or is there a point at
> > which a complete tree exists for the entire source file, which would
> > therefore be the best time to call a function to output a "snapshot" of
> > the tree?  (I guess this is actually a re-statement of my first
> > question.)
> >
> > If there are any examples or code fragments of similar applications that
> > you can share with me, I would very much appreciate it.  I am primarily
> > interest in processing C source code right now, but would like to make
> > the application robust enough to handle C++ as well, and take advantage
> > of the fact that they are both parsed into a tree.
> >
> > Thankyou,
> >
> > Jeff Richardson
> > jlrichardson@link.com
> > (407)382-1580