Re: [Boost-bugs] [Boost C++ Libraries] #10080: Make optional copy-ctor

Subject: Re: [Boost-bugs] [Boost C++ Libraries] #10080: Make optional copy-ctor
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2014-05-31 08:14:42

#10080: Make optional copy-ctor
-------------------------------+-----------------------
  Reporter:  voivoid@…         |      Owner:  olli
      Type:  Feature Requests  |     Status:  closed
 Milestone:  To Be Determined  |  Component:  coroutine
   Version:  Boost 1.55.0      |   Severity:  Problem
Resolution:  invalid           |   Keywords:
-------------------------------+-----------------------
Changes (by olli):

 * status:  new => closed
 * resolution:   => invalid

Comment:

 making coroutine copy-able would require to copy the stack. this is
 dangerous even with POD.
 you get unexpected behaviour if you copy a stack which has
 references/pointers to objects on the stack.


 {{{
 int i = 0;
 ...
 int * j = & i;
 }}}


 If you copy the stack above, j of the new (copied-to) stack would contain
 the address of i of the original (copied-from) stack.

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/10080#comment:1>
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