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representation_t->txn_id ?

From: Ben Collins-Sussman <sussman_at_red-bean.com>
Date: 2005-12-16 19:15:49 CET

I'm confused about the meaning of the 'txn_id' field in

  /* transaction ID under which representation was created (used as a
     mutability flag when compared with a current editing
     transaction). */
  const char *txn_id;

Now, I've heard cmpilato talk about our famous node-rev-id x.y.z
triplets, and how the 'z' part is the transaction the node was created
in, and how it can be examined to decide if the node is mutable or

But I'm not understanding how this concept plays with representations.
 The docstring suggests something similar about being a mutability
flag, and if you look at reps-strings.c:1552 or so, our deltification
explicitly sets the field to NULL when writing out a new rep. Is that
a bug? Or is it intentional.

I suspect cmpilato is the best person to de-confuse me here. :-)

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Received on Fri Dec 16 19:16:59 2005

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