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bug#29220: 26.0.90; eieio-persistent-read fail to restore saved object.
From: |
Pierre Téchoueyres |
Subject: |
bug#29220: 26.0.90; eieio-persistent-read fail to restore saved object. |
Date: |
Tue, 28 Nov 2017 22:39:04 +0100 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/25.3 (gnu/linux) |
Noam Postavsky <npostavs@users.sourceforge.net> writes:
>> I've tried to dive into print.c but I don't understand how you return
>> from print_object, when you're on an hash-table to obtain the vector
>> with an eieio-class-tag--<class> (as in 25.3) ?
>>
>> Can anyone tell me how this work in 25.3 ?
>
> Nothing has changed in print.c in this respect. In 25.3, objects are
> vectors, and class tags are symbols. In 26, objects are records and
> class tags are eieio--class records. As a result, they print
> differently.
I trust you, but that's not the answer I expected, sorry.
I tried to follow the trace from the call of `eieio-persistent-save'
until I could find where it prints the content of the hash table.
What bothers me is that, in emacs 25, you had have an short vector with
a symbol and now you've an big object dump instead.
Emacs 25 :
[eieio-class-tag--person "Bob"]
Emacs 26 :
#s(#2=#s(eieio--class person nil nil [#s(cl-slot-descriptor name #3=#:unbound
string nil)] #s(hash-table size 65 test eq rehash-size 1.5 rehash-threshold
0.8125 data (name 0)) nil ((:name . name)) #1=[] #1# #s(#2# #3#)
(:custom-groups nil)) "Bob")
As a side note: as class tags are now eieio--class objects you can't read
an object saved with emacs 25 in emacs 26. Maybe this incompatibility
should be documented into NEWS ?
P.S.
I hope that I'm not too harsh. It's not my intention.
- bug#29220: 26.0.90; eieio-persistent-read fail to restore saved object., (continued)
- bug#29220: 26.0.90; eieio-persistent-read fail to restore saved object., Noam Postavsky, 2017/11/17
- bug#29220: 26.0.90; eieio-persistent-read fail to restore saved object., Eric Abrahamsen, 2017/11/17
- bug#29220: 26.0.90; eieio-persistent-read fail to restore saved object., Noam Postavsky, 2017/11/18
- bug#29220: 26.0.90; eieio-persistent-read fail to restore saved object., Eric Abrahamsen, 2017/11/18
- bug#29220: 26.0.90; eieio-persistent-read fail to restore saved object., Noam Postavsky, 2017/11/18
- bug#29220: 26.0.90; eieio-persistent-read fail to restore saved object., Eric Abrahamsen, 2017/11/19
- bug#29220: 26.0.90; eieio-persistent-read fail to restore saved object., Pierre Téchoueyres, 2017/11/23
- bug#29220: 26.0.90; eieio-persistent-read fail to restore saved object., Noam Postavsky, 2017/11/23
- bug#29220: 26.0.90; eieio-persistent-read fail to restore saved object.,
Pierre Téchoueyres <=
- bug#29220: 26.0.90; eieio-persistent-read fail to restore saved object., Noam Postavsky, 2017/11/28
- bug#29220: 26.0.90; eieio-persistent-read fail to restore saved object., Pierre Téchoueyres, 2017/11/28
- bug#29220: 26.0.90; eieio-persistent-read fail to restore saved object., Noam Postavsky, 2017/11/28
- bug#29220: 26.0.90; eieio-persistent-read fail to restore saved object., Stefan Monnier, 2017/11/29
- bug#29220: 26.0.90; eieio-persistent-read fail to restore saved object., Eric Abrahamsen, 2017/11/28
- bug#29220: 26.0.90; eieio-persistent-read fail to restore saved object., Stefan Monnier, 2017/11/29