Boost C++ Libraries: Ticket #8772: boost.variant broken in combination with g++ 4.6.x series and C++0x

attachment set

anonymous — Wed, 03 Jul 2013 11:59:33 GMT

attachment → errormessage.txt

The error message generated by g++ 4.6.3

attachment set

anonymous — Wed, 03 Jul 2013 12:01:57 GMT

attachment → boost_1_54_0_variant.patch

Simple fix to disable specific variant optimizations relying on rvalue references.

Antony Polukhin — Fri, 12 Jul 2013 13:13:30 GMT

This can be fixed by removing typename B1, from first void assign_impl, making it look like:

        template <typename RhsT, typename B2>
        void assign_impl(
              RhsT& rhs_content
            , mpl::true_ // has_nothrow_copy
            , mpl::false_ // is_nothrow_move_constructible
            , B2 // has_fallback_type
            )

cc set

Antony Polukhin — Fri, 12 Jul 2013 13:20:35 GMT

cc antoshkka@… added

anonymous — Mon, 15 Jul 2013 12:24:03 GMT

Agreed, looks better. I didn't see the obvious ...

For me this bug can be closed after applying this patch to the trunk.

Antony Polukhin — Fri, 19 Jul 2013 07:52:41 GMT

(In [85080]) Fix compilation of Boost.Variants move assignment for situations when one of the variant template classes has nothrow copy constructor and throwing move constructor (refs #8772)

owner, status changed

Antony Polukhin — Fri, 19 Jul 2013 07:53:23 GMT

owner changed from ebf to Antony Polukhin
status new → assigned

Antony Polukhin — Sat, 20 Jul 2013 15:32:32 GMT

(In [85087]) Fix test case (refs #8772)

status changed; resolution set

Antony Polukhin — Thu, 25 Jul 2013 08:42:46 GMT

status assigned → closed
resolution → fixed

(In [85157]) Merge from trunk:

make the library work on exception-disabled environments (fixes #8717)
fix compilation of Boost.Variants move assignment for situations when one of the variant template classes has nothrow copy constructor and throwing move constructor (fixes #8772)
mark move constructor of variant with BOOST_NOEXCEPT_IF (refs #7911)

milestone changed

Antony Polukhin — Thu, 25 Jul 2013 13:20:46 GMT

milestone To Be Determined → Boost 1.55.0