Re: [boost] [conversion] Need a help with MSVC failures

30 Jan 2014


      On 1/30/2014 3:18 PM, Antony Polukhin wrote:
...
2014-01-30 Edward Diener 
...
On 1/30/2014 3:14 AM, Antony Polukhin wrote:
...
2014-01-30 Edward Diener 
On 1/30/2014 12:24 AM, Antony Polukhin wrote:
...
Hi,
...
Some of the tests for Boost.LexicalCast fail on any MSVC compiler.
Unfortunately currently I have no access to Windows.
Could someone please investigate the failures and tell me were to search
the bug?
From where are the lexical_cast tests run in modular-boost ?
boost/libs/conversion/test/
I assume this is in the develop branch tests. Running the tests on my
machine, with msvc-12.0 I see two failures.
First is:
lexical_cast_loopback_test.cpp(55): error in
"test_round_conversion_double": check min_ == lexical_cast<T>(min_s)
failed
lexical_cast_loopback_test.cpp(55): error in "test_round_conversion_long_double":
check min_ == lexical_cast<T>(min_s) failed
This looks like the roundtrip conversion with double and long double is
not accurate enough.
It's a known and ancient error on MSVC.
...
Second is:
lexical_cast_containers_test.cpp
C:\Programming\VersionControl\modular-boost\boost/intrusive/
detail/has_member_function_callable_with.hpp(200) : error C2228: left of
'.select_on_container_copy_construction' must have class/struct/union
         type is 'boost::move_detail::add_rvalue_reference<U>::type'
C:\Programming\VersionControl\modular-boost\boost/intrusive/
detail/has_member_function_callable_with.hpp(276) : see reference to
class template instantiation 'boost::container::container_
detail::has_member_function_callable_with_select_on_
container_copy_construction_impl' being compiled
         with
         [
             Fun=std::allocator<char>
         ]
C:\Programming\VersionControl\modular-boost\boost/container/allocator_traits.hpp(262)
: see reference to class template instantiation
'boost::container::container_detail::has_member_function_
callable_with_select_on_container_copy_construction' being
compiled
         with
         [
             Alloc=std::allocator<char>
         ]
C:\Programming\VersionControl\modular-boost\boost/container/string.hpp(76)
: see reference to class template instantiation
'boost::container::allocator_traits<Allocator>' being compiled
         with
         [
             Allocator=std::allocator<char>
         ]
C:\Programming\VersionControl\modular-boost\boost/container/string.hpp(473)
: see reference to class template instantiation
'boost::container::container_detail::basic_string_base<Allocator>' being
compiled
         with
         [
             Allocator=std::allocator<char>
         ]
         lexical_cast_containers_test.cpp(35) : see reference to class
template instantiation 'boost::container::basic_
string' being compiled
It looks like 'boost::move_detail::declval<F>()' is not resolving to
anything but I will let you figure this out.
It's a Boost.Container library issue. I think maintainer knows about it:
that issue sometimes appear in develop branch, and always get fixed in a
few weeks.
Actually with the latest 'develop' change in 'intrusive' the second 
error no longer ococurs.
...
...
One thing I noticed. The tester must run 'b2 headers' after getting the
conversion 'develop' branch and before running the tests. This is because
of the hard link issue I have brought up a number of times on this mailing
list.
Yep, that annoys sometimes.
Thanks a lot for helping!
But regression tests still report a lot of errors on MSVC:
http://www.boost.org/development/tests/develop/developer/conversion.html
Could you please run same tests using Boost.Test from 'develop' branch? I
think now that errors came from Boost.Test library.
I will try that and report back.