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Re: Does -fdump-tree-original-raw dumps out the full AST?

On Thu, Jul 24, 2014 at 11:57 AM, Francois Berenger
<> wrote:
> On Thu, Jul 24, 2014 at 4:29 PM, Diego Novillo <> wrote:
>> On Thu, Jul 24, 2014 at 7:17 AM, Francois Berenger
>> <> wrote:
>>> Complete in the sense that, by parsing back this text file
>>> with an external program it would be possible to reconstruct the original AST
>>> that gcc was working on (and dumped out).
>> It isn't. These dumps are meant to be debugging aids. It is not
>> possible to reconstruct the original program out of them.
> Would it be possible to make these dumps complete?
> Let's say for the C frontend of gcc.

That's likely to be a significant effort. The tree representation is
not really streamable. The front end keeps a lot of state in-memory
that is not attached to the tree themselves.

There was some preliminary effort to achieve this with the pre-parsed
headers project (a precursor to C++ modules). We've since abandoned
the effort, but you can still get at the code and documentation:


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