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<p>Dear Marc, Gergor, Jim,</p>
<p>thank you for your quick responses!</p>
<p>Jim, I was aware of ODR, however, since this pattern is already
used in SCIP, I also wanted to use it.</p>
<p>Gregor, I tried something like this earlier, but did not worked.
However, it should be OK, so next time I will try again.</p>
<p>Marc, surprisingly, removing the default member initializers
solved the issue. I guess, this type of member initialization in
structures with the same name causes a problem to the linker
(since in other cases it works perfectly).</p>
<p>Sorry for the off-topic, but at least my problem is seems to be
solved. :D<br>
</p>
<p>Regards,<br>
Marko<br>
</p>
<div class="moz-cite-prefix">2020. 10. 22. 10:37 keltezéssel,
Horváth Markó írta:<br>
</div>
<blockquote type="cite"
cite="mid:64efb69c-dea5-2352-a9c6-048ecf77daa0@sztaki.hu">Dear
All,
<br>
<br>
I am working on a branch-and-price project using SCIP, but I got
stuck on something. Actually, I reduced my problem to a "simple"
C++ issue, but due to the design of SCIP maybe you have already
run into this problem and know the solution.
<br>
<br>
So, my problem is that I have three different user-defined
constraints and thus three different user-defined constraint data,
that is, three different structures in three different .cpp files
with the same name: SCIP_ConsData. (Due to the design of SCIP, I
must use this name for all structures). Everything was fine when I
used only the first two constraints (it was also a luck, I guess),
however, the third one ruined everything. The problem is that in
runtime these structures are mixed up which causes a heap
corruption.
<br>
<br>
More precisely, I have three SCIP_ConsData structures in different
.cpp files (say, one.cpp, two.cpp, three.cpp) and when I want to
create a new instance of the corresponding SCIP_ConsData in file
two.cpp, the structure in file one.cpp is going to be created.
Later, it will cause a heap corruption.
<br>
<br>
What should I do to fix this issue?
<br>
<br>
I attach a very minimal working example for this phenomenon. I use
Visual Studio 2019 under Windows 10 with C++17 Standard.
<br>
<br>
Best Regards,
<br>
Marko
<br>
<br>
<fieldset class="mimeAttachmentHeader"></fieldset>
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</blockquote>
<pre class="moz-signature" cols="72">--
Markó HORVÁTH MSc,
research associate
-------------------------------------------------------------
Research Laboratory on Engineering & Management Intelligence,
Institute for Computer Science and Control
H-1111 Budapest, Kende u. 13-17.
Room : K318
Phone: +36 1 279 7164</pre>
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