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https://issues.apache.org/jira/browse/PROTON-1629?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16336145#comment-16336145
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Andrew Stitcher commented on PROTON-1629:
-----------------------------------------
Actually the compile error is that there is not a *copy* assignment, and there
cannot be one because pn_unique_ptr can only be moved and never copied.
Why the compiler isn't trying to use a move assignment/constructor does not
appear obvious to me at this point - I shall think about it some more!
> [cpp] proton::container is not move constructible
> -------------------------------------------------
>
> Key: PROTON-1629
> URL: https://issues.apache.org/jira/browse/PROTON-1629
> Project: Qpid Proton
> Issue Type: Improvement
> Components: cpp-binding
> Affects Versions: proton-c-0.18.0
> Environment: Linux, gcc (GCC) 7.0.1 20170409 (experimental), git tip
> at
> commit 72b7ea0508e94aae3e5d9470293bc5c7e8250a45 (upstream/master)
> PROTON-1592: [python] restore original tx_recv.py example
> Reporter: Jiri Daněk
> Assignee: Andrew Stitcher
> Priority: Minor
> Fix For: proton-c-0.20.0
>
>
> Following C++11 code does not compile
> {code}
> auto handler = proton::messaging_handler();
> auto container = proton::container(handler); // container is not move
> constructible
> {code}
> Error from GCC is
> {noformat}
> /home/jdanek/Work/repos/qpid-proton/proton-c/bindings/cpp/src/container_test.cpp:
> In function ‘int {anonymous}::test_container_schedule_multithreaded()’:
> /home/jdanek/Work/repos/qpid-proton/proton-c/bindings/cpp/src/container_test.cpp:591:47:
> error: use of deleted function ‘proton::container::container(const
> proton::container&)’
> auto container = proton::container(handler); // container is not move
> constructible
> ^
> In file included from
> /home/jdanek/Work/repos/qpid-proton/proton-c/bindings/cpp/src/container_test.cpp:28:0:
> /home/jdanek/Work/repos/qpid-proton/proton-c/bindings/cpp/include/proton/container.hpp:55:27:
> note: ‘proton::container::container(const proton::container&)’ is implicitly
> deleted because the default definition would be ill-formed:
> class PN_CPP_CLASS_EXTERN container {
> ^~~~~~~~~
> /home/jdanek/Work/repos/qpid-proton/proton-c/bindings/cpp/include/proton/container.hpp:55:27:
> error: use of deleted function ‘constexpr
> proton::internal::pn_unique_ptr<proton::container::impl>::pn_unique_ptr(const
> proton::internal::pn_unique_ptr<proton::container::impl>&)’
> In file included from
> /home/jdanek/Work/repos/qpid-proton/proton-c/bindings/cpp/include/proton/connection_options.hpp:29:0,
> from
> /home/jdanek/Work/repos/qpid-proton/proton-c/bindings/cpp/src/container_test.cpp:27:
> /home/jdanek/Work/repos/qpid-proton/proton-c/bindings/cpp/include/proton/./internal/pn_unique_ptr.hpp:43:26:
> note: ‘constexpr
> proton::internal::pn_unique_ptr<proton::container::impl>::pn_unique_ptr(const
> proton::internal::pn_unique_ptr<proton::container::impl>&)’ is implicitly
> declared as deleted because
> ‘proton::internal::pn_unique_ptr<proton::container::impl>’ declares a move
> constructor or move assignment operator
> template <class T> class pn_unique_ptr {
> ^~~~~~~~~~~~~
> make[3]: ***
> [proton-c/bindings/cpp/CMakeFiles/container_test.dir/build.make:63:
> proton-c/bindings/cpp/CMakeFiles/container_test.dir/src/container_test.cpp.o]
> Error 1
> {noformat}
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