Opened 4 years ago

Closed 4 years ago

Last modified 4 years ago

#8842 closed Patches (fixed)

BOOST_MOVABLE_BUT_NOT_COPYABLE and is_copy_constructible<T> trait

Reported by: apolukhin Owned by: igaztanaga
Milestone: Boost 1.55.0 Component: move
Version: Boost 1.54.0 Severity: Showstopper
Keywords: Cc:


There is a ticket #8802 to add is_copy_constructible<T> trait. Unfortunately, for correct work of that trait in C++03/C++98 with BOOST_MOVABLE_BUT_NOT_COPYABLE macro some changes for Boost.Move are required.

Boost.Move requires the following patch applied to to BOOST_MOVE_IMPL_NO_COPY_CTOR_OR_ASSIGN in boost/move/core.hpp :

      TYPE(TYPE &);\
      TYPE& operator=(TYPE &);\
+      public: \
+      typedef int boost_move_no_copy_constructor_or_assign; \
+      private: \

Some tests for that case already exist in boost/type_traits/is_copy_constructible.hpp, I'll uncomment them when this patch will be applied.

Motivation: Without that patch it is impossible to have a nice implementation of move_if_noexcept, that is going to be used by Boost.CircularBuffer? and may be used by other containers.

P.S.: If you wish and have no spare time, I can apply this patch and add some tests to Boost.Move

Attachments (0)

Change History (6)

comment:1 Changed 4 years ago by apolukhin

  • Severity changed from Problem to Showstopper

This ticket blocks #8802, which blocks #7888

comment:2 Changed 4 years ago by igaztanaga

  • Resolution set to fixed
  • Status changed from new to closed

(In [85180]) Fixes #8842.

comment:3 Changed 4 years ago by apolukhin

(In [85193]) Test is_copy_constructible trait on C++03/98 with Boost.Move emulation of noncopyable-movable type (refs #8802, refs #8842)

comment:4 Changed 4 years ago by apolukhin

If it is possible and all the tests pass well, can this fix be merged into release branch in nearest one and a half weeks? I'm a little bit frightened that there'll be not enough time to merge and release-test TypeTraits? and CircularBufer? changes.

comment:5 Changed 4 years ago by igaztanaga

Ok, I'll merge it into the release branch ASAP.

comment:6 Changed 4 years ago by igaztanaga

Merged, thanks for the bug report.

Add Comment

Modify Ticket

Change Properties
Set your email in Preferences
as closed The owner will remain igaztanaga.
The resolution will be deleted. Next status will be 'reopened'.

E-mail address and user name can be saved in the Preferences.

Note: See TracTickets for help on using tickets.