[boost] [Boost-bugs] [ boost-Bugs-1238243 ] shared_ptr/weak_ptr tests are not C++ spec compliant

From: SourceForge.net (noreply_at_[hidden])
Date: 2005-07-14 09:30:15

Bugs item #1238243, was opened at 2005-07-14 07:30
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Category: smart_ptr
Group: None
Status: Open
Resolution: None
Priority: 5
Submitted By: Nobody/Anonymous (nobody)
Assigned to: Peter Dimov (pdimov)
Summary: shared_ptr/weak_ptr tests are not C++ spec compliant

Initial Comment:
Please refer to the latest C++ spec (Second edition,
2003-04-01), section 12.8.15, "Copying class objects".
Look at your source code in test/weak_ptr_test.cpp.

1. You cannot assume the reference count of the
shared_ptr going into the copy_assignment function is
one. The spec says that compilers are allowed to make
an optimization to eliminate a copy, but not mandated
to do so. This means that the effective reference count
upon entry to the function may be two, not one.

To correct your unit tests, forcibly create a local
object that you pass by value to guarantee the
reference count is two upon entry for all compilers.

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