Compile [2024-11-15 18:22:17 UTC]: fail
"g++-12" -fvisibility-inlines-hidden -std=c++17 -fPIC -m64 -pthread -O0 -fno-inline -Wall -fvisibility=hidden -DBOOST_ALL_NO_LIB=1 -DBOOST_COBALT_USE_STD_PMR=1 -I".." -I"../libs/hana/include" -I"../libs/hana/test/_include" -c -o "/var/boost/run/results/boost/bin.v2/libs/hana/test/test~set~difference.test/gcc-12~c++17/debug/x86_64/debug-symbols-off/threading-multi/visibility-hidden/set/difference.o" "../libs/hana/test/set/difference.cpp"
In file included from ../boost/hana/detail/operators/comparable.hpp:15,
from ../boost/hana/pair.hpp:20,
from ../boost/hana/unpack.hpp:26,
from ../boost/hana/fold_left.hpp:20,
from ../boost/hana/concept/foldable.hpp:19,
from ../boost/hana/core/to.hpp:16,
from ../boost/hana/bool.hpp:17,
from ../boost/hana/eval_if.hpp:15,
from ../boost/hana/concept/logical.hpp:19,
from ../boost/hana/if.hpp:15,
from ../boost/hana/assert.hpp:16,
from ../libs/hana/test/set/difference.cpp:5:
../boost/hana/fwd/equal.hpp: In instantiation of 'struct boost::hana::equal_impl<boost::hana::test::Integer<(boost::hana::test::Policy)17, void>, boost::hana::test::Integer<(boost::hana::test::Policy)17, void>, void>':
../boost/hana/equal.hpp:50:28: required from 'constexpr auto boost::hana::equal_t::operator()(X&&, Y&&) const [with X = const boost::hana::test::ct_eq<0>&; Y = const boost::hana::test::ct_eq<0>&]'
../boost/hana/functional/partial.hpp:78:43: required from 'constexpr decltype(auto) boost::hana::partial_t<std::integer_sequence<long unsigned int, _Idx ...>, F, X ...>::operator()(Y&& ...) const & [with Y = {const boost::hana::test::ct_eq<0>&}; long unsigned int ...n = {0}; F = boost::hana::equal_t; X = {boost::hana::test::ct_eq<0>}]'
../boost/hana/set.hpp:173:38: required from 'constexpr auto boost::hana::any_of_impl<boost::hana::set_tag>::any_of_helper<Pred>::operator()(const X& ...) const [with X = {boost::hana::test::ct_eq<0>}; Pred = boost::hana::partial_t<std::integer_sequence<long unsigned int, 0>, boost::hana::equal_t, boost::hana::test::ct_eq<0> >]'
../boost/hana/basic_tuple.hpp:115:39: required from 'static constexpr decltype(auto) boost::hana::unpack_impl<boost::hana::basic_tuple_tag>::apply(const boost::hana::detail::basic_tuple_impl<std::integer_sequence<long unsigned int, _Idx ...>, Xn ...>&, F&&) [with long unsigned int ...i = {0}; Xn = {boost::hana::test::ct_eq<0>}; F = boost::hana::any_of_impl<boost::hana::set_tag>::any_of_helper<boost::hana::partial_t<std::integer_sequence<long unsigned int, 0>, boost::hana::equal_t, boost::hana::test::ct_eq<0> > >]'
../boost/hana/unpack.hpp:47:29: required from 'constexpr decltype(auto) boost::hana::unpack_t::operator()(Xs&&, F&&) const [with Xs = const boost::hana::basic_tuple<boost::hana::test::ct_eq<0> >&; F = boost::hana::any_of_impl<boost::hana::set_tag>::any_of_helper<boost::hana::partial_t<std::integer_sequence<long unsigned int, 0>, boost::hana::equal_t, boost::hana::test::ct_eq<0> > >]'
../boost/hana/tuple.hpp:233:32: [ skipping 15 instantiation contexts, use -ftemplate-backtrace-limit=0 to disable ]
../boost/hana/is_subset.hpp:51:31: required from 'constexpr auto boost::hana::is_subset_t::operator()(Xs&&, Ys&&) const [with Xs = const boost::hana::set<boost::hana::test::ct_eq<0> >&; Ys = const boost::hana::set<boost::hana::test::ct_eq<0> >&]'
../boost/hana/functional/infix.hpp:92:23: required from 'constexpr decltype(auto) boost::hana::infix_detail::infix_t<left, right, F>::operator()(X&& ...) const & [with X = {const boost::hana::set<boost::hana::test::ct_eq<0> >&, const boost::hana::set<boost::hana::test::ct_eq<0> >&}; bool left = false; bool right = false; F = boost::hana::is_subset_t]'
../boost/hana/set.hpp:128:33: required from 'static constexpr auto boost::hana::equal_impl<boost::hana::set_tag, boost::hana::set_tag>::equal_helper(const S1&, const S2&, boost::hana::true_) [with S1 = boost::hana::set<boost::hana::test::ct_eq<0> >; S2 = boost::hana::set<boost::hana::test::ct_eq<0> >; boost::hana::true_ = boost::hana::integral_constant<bool, true>]'
../boost/hana/set.hpp:136:44: required from 'static constexpr decltype(auto) boost::hana::equal_impl<boost::hana::set_tag, boost::hana::set_tag>::apply(S1&&, S2&&) [with S1 = boost::hana::set<boost::hana::test::ct_eq<0> >; S2 = boost::hana::set<boost::hana::test::ct_eq<0> >]'
../boost/hana/equal.hpp:50:28: required from 'constexpr auto boost::hana::equal_t::operator()(X&&, Y&&) const [with X = boost::hana::set<boost::hana::test::ct_eq<0> >; Y = boost::hana::set<boost::hana::test::ct_eq<0> >]'
../libs/hana/test/set/difference.cpp:23:5: required from here
../boost/hana/fwd/equal.hpp:69:12: error: ambiguous template instantiation for 'struct boost::hana::equal_impl<boost::hana::test::Integer<(boost::hana::test::Policy)17, void>, boost::hana::test::Integer<(boost::hana::test::Policy)17, void>, boost::hana::when<true> >'
69 | struct equal_impl : equal_impl<T, U, when<true>> { };
| ^~~~~~~~~~
In file included from ../libs/hana/test/set/difference.cpp:7:
../boost/hana/equal.hpp:55:12: note: candidates are: 'template<class T, class U, bool condition> struct boost::hana::equal_impl<T, U, boost::hana::when<condition> > [with T = boost::hana::test::Integer<(boost::hana::test::Policy)17, void>; U = boost::hana::test::Integer<(boost::hana::test::Policy)17, void>; bool condition = true]'
55 | struct equal_impl<T, U, when<condition>> : default_ {
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
../boost/hana/equal.hpp:104:12: note: 'template<class C> struct boost::hana::equal_impl<C, C, boost::hana::when<(boost::hana::Constant<C>::value && boost::hana::Comparable<typename C::value_type>::value)> > [with C = boost::hana::test::Integer<(boost::hana::test::Policy)17, void>]'
104 | struct equal_impl<C, C, when<
| ^~~~~~~~~~~~~~~~~~~~~~
105 | hana::Constant<C>::value &&
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~
106 | Comparable<typename C::value_type>::value
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
107 | >> {
| ~~
../boost/hana/fwd/equal.hpp:69:12: error: invalid use of incomplete type 'struct boost::hana::equal_impl<boost::hana::test::Integer<(boost::hana::test::Policy)17, void>, boost::hana::test::Integer<(boost::hana::test::Policy)17, void>, boost::hana::when<true> >'
69 | struct equal_impl : equal_impl<T, U, when<true>> { };
| ^~~~~~~~~~
../boost/hana/fwd/equal.hpp:69:12: note: declaration of 'struct boost::hana::equal_impl<boost::hana::test::Integer<(boost::hana::test::Policy)17, void>, boost::hana::test::Integer<(boost::hana::test::Policy)17, void>, boost::hana::when<true> >'
../boost/hana/equal.hpp: In instantiation of 'constexpr auto boost::hana::equal_t::operator()(X&&, Y&&) const [with X = const boost::hana::test::ct_eq<0>&; Y = const boost::hana::test::ct_eq<0>&]':
../boost/hana/functional/partial.hpp:78:43: required from 'constexpr decltype(auto) boost::hana::partial_t<std::integer_sequence<long unsigned int, _Idx ...>, F, X ...>::operator()(Y&& ...) const & [with Y = {const boost::hana::test::ct_eq<0>&}; long unsigned int ...n = {0}; F = boost::hana::equal_t; X = {boost::hana::test::ct_eq<0>}]'
../boost/hana/set.hpp:173:38: required from 'constexpr auto boost::hana::any_of_impl<boost::hana::set_tag>::any_of_helper<Pred>::operator()(const X& ...) const [with X = {boost::hana::test::ct_eq<0>}; Pred = boost::hana::partial_t<std::integer_sequence<long unsigned int, 0>, boost::hana::equal_t, boost::hana::test::ct_eq<0> >]'
../boost/hana/basic_tuple.hpp:115:39: required from 'static constexpr decltype(auto) boost::hana::unpack_impl<boost::hana::basic_tuple_tag>::apply(const boost::hana::detail::basic_tuple_impl<std::integer_sequence<long unsigned int, _Idx ...>, Xn ...>&, F&&) [with long unsigned int ...i = {0}; Xn = {boost::hana::test::ct_eq<0>}; F = boost::hana::any_of_impl<boost::hana::set_tag>::any_of_helper<boost::hana::partial_t<std::integer_sequence<long unsigned int, 0>, boost::hana::equal_t, boost::hana::test::ct_eq<0> > >]'
../boost/hana/unpack.hpp:47:29: required from 'constexpr decltype(auto) boost::hana::unpack_t::operator()(Xs&&, F&&) const [with Xs = const boost::hana::basic_tuple<boost::hana::test::ct_eq<0> >&; F = boost::hana::any_of_impl<boost::hana::set_tag>::any_of_helper<boost::hana::partial_t<std::integer_sequence<long unsigned int, 0>, boost::hana::equal_t, boost::hana::test::ct_eq<0> > >]'
../boost/hana/tuple.hpp:233:32: required from 'static constexpr decltype(auto) boost::hana::unpack_impl<boost::hana::tuple_tag>::apply(Xs&&, F&&) [with Xs = const boost::hana::tuple<boost::hana::test::ct_eq<0> >&; F = boost::hana::any_of_impl<boost::hana::set_tag>::any_of_helper<boost::hana::partial_t<std::integer_sequence<long unsigned int, 0>, boost::hana::equal_t, boost::hana::test::ct_eq<0> > >]'
../boost/hana/unpack.hpp:47:29: [ skipping 14 instantiation contexts, use -ftemplate-backtrace-limit=0 to disable ]
../boost/hana/is_subset.hpp:51:31: required from 'constexpr auto boost::hana::is_subset_t::operator()(Xs&&, Ys&&) const [with Xs = const boost::hana::set<boost::hana::test::ct_eq<0> >&; Ys = const boost::hana::set<boost::hana::test::ct_eq<0> >&]'
../boost/hana/functional/infix.hpp:92:23: required from 'constexpr decltype(auto) boost::hana::infix_detail::infix_t<left, right, F>::operator()(X&& ...) const & [with X = {const boost::hana::set<boost::hana::test::ct_eq<0> >&, const boost::hana::set<boost::hana::test::ct_eq<0> >&}; bool left = false; bool right = false; F = boost::hana::is_subset_t]'
../boost/hana/set.hpp:128:33: required from 'static constexpr auto boost::hana::equal_impl<boost::hana::set_tag, boost::hana::set_tag>::equal_helper(const S1&, const S2&, boost::hana::true_) [with S1 = boost::hana::set<boost::hana::test::ct_eq<0> >; S2 = boost::hana::set<boost::hana::test::ct_eq<0> >; boost::hana::true_ = boost::hana::integral_constant<bool, true>]'
../boost/hana/set.hpp:136:44: required from 'static constexpr decltype(auto) boost::hana::equal_impl<boost::hana::set_tag, boost::hana::set_tag>::apply(S1&&, S2&&) [with S1 = boost::hana::set<boost::hana::test::ct_eq<0> >; S2 = boost::hana::set<boost::hana::test::ct_eq<0> >]'
../boost/hana/equal.hpp:50:28: required from 'constexpr auto boost::hana::equal_t::operator()(X&&, Y&&) const [with X = boost::hana::set<boost::hana::test::ct_eq<0> >; Y = boost::hana::set<boost::hana::test::ct_eq<0> >]'
../libs/hana/test/set/difference.cpp:23:5: required from here
../boost/hana/equal.hpp:50:28: error: 'apply' is not a member of 'Equal' {aka 'boost::hana::equal_impl<boost::hana::test::Integer<(boost::hana::test::Policy)17, void>, boost::hana::test::Integer<(boost::hana::test::Policy)17, void>, void>'}
50 | return Equal::apply(static_cast<X&&>(x), static_cast<Y&&>(y));
| ~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
../libs/hana/test/set/difference.cpp: In function 'int main()':
../boost/hana/assert.hpp:227:9: error: template argument 1 is invalid
227 | >::value, \
| ^
../boost/hana/assert.hpp:240:9: note: in expansion of macro 'BOOST_HANA_CONSTANT_CHECK_MSG'
240 | BOOST_HANA_CONSTANT_CHECK_MSG( \
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
../libs/hana/test/set/difference.cpp:23:5: note: in expansion of macro 'BOOST_HANA_CONSTANT_CHECK'
23 | BOOST_HANA_CONSTANT_CHECK(hana::equal(
| ^~~~~~~~~~~~~~~~~~~~~~~~~
../boost/hana/assert.hpp:232:10: error: no matching function for call to 'value<<expression error> >()'
230 | static_assert(::boost::hana::value< \
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
231 | decltype(BOOST_HANA_PP_CONCAT(__hana_tmp_, __LINE__)) \
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
232 | >(), message); \
| ~^~
../boost/hana/assert.hpp:240:9: note: in expansion of macro 'BOOST_HANA_CONSTANT_CHECK_MSG'
240 | BOOST_HANA_CONSTANT_CHECK_MSG( \
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
../libs/hana/test/set/difference.cpp:23:5: note: in expansion of macro 'BOOST_HANA_CONSTANT_CHECK'
23 | BOOST_HANA_CONSTANT_CHECK(hana::equal(
| ^~~~~~~~~~~~~~~~~~~~~~~~~
In file included from ../boost/hana/concept/constant.hpp:19,
from ../boost/hana/assert.hpp:13:
../boost/hana/value.hpp:31:30: note: candidate: 'template<class T> constexpr decltype(auto) boost::hana::value()'
31 | constexpr decltype(auto) value() {
| ^~~~~
../boost/hana/value.hpp:31:30: note: template argument deduction/substitution failed:
../boost/hana/assert.hpp:232:10: error: template argument 1 is invalid
230 | static_assert(::boost::hana::value< \
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
231 | decltype(BOOST_HANA_PP_CONCAT(__hana_tmp_, __LINE__)) \
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
232 | >(), message); \
| ~^~
../boost/hana/assert.hpp:240:9: note: in expansion of macro 'BOOST_HANA_CONSTANT_CHECK_MSG'
240 | BOOST_HANA_CONSTANT_CHECK_MSG( \
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
../libs/hana/test/set/difference.cpp:23:5: note: in expansion of macro 'BOOST_HANA_CONSTANT_CHECK'
23 | BOOST_HANA_CONSTANT_CHECK(hana::equal(
| ^~~~~~~~~~~~~~~~~~~~~~~~~
In file included from ../boost/hana/value.hpp:13:
../boost/hana/fwd/value.hpp:65:30: note: candidate: 'template<class T> constexpr decltype(auto) boost::hana::value(const T&)'
65 | constexpr decltype(auto) value(T const&)
| ^~~~~
../boost/hana/fwd/value.hpp:65:30: note: candidate expects 1 argument, 0 provided
../boost/hana/assert.hpp:227:9: error: template argument 1 is invalid
227 | >::value, \
| ^
../boost/hana/assert.hpp:240:9: note: in expansion of macro 'BOOST_HANA_CONSTANT_CHECK_MSG'
240 | BOOST_HANA_CONSTANT_CHECK_MSG( \
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
../libs/hana/test/set/difference.cpp:30:5: note: in expansion of macro 'BOOST_HANA_CONSTANT_CHECK'
30 | BOOST_HANA_CONSTANT_CHECK(hana::equal(
| ^~~~~~~~~~~~~~~~~~~~~~~~~
../boost/hana/assert.hpp:232:10: error: no matching function for call to 'value<<expression error> >()'
230 | static_assert(::boost::hana::value< \
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
231 | decltype(BOOST_HANA_PP_CONCAT(__hana_tmp_, __LINE__)) \
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
232 | >(), message); \
| ~^~
../boost/hana/assert.hpp:240:9: note: in expansion of macro 'BOOST_HANA_CONSTANT_CHECK_MSG'
240 | BOOST_HANA_CONSTANT_CHECK_MSG( \
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
../libs/hana/test/set/difference.cpp:30:5: note: in expansion of macro 'BOOST_HANA_CONSTANT_CHECK'
30 | BOOST_HANA_CONSTANT_CHECK(hana::equal(
| ^~~~~~~~~~~~~~~~~~~~~~~~~
../boost/hana/value.hpp:31:30: note: candidate: 'template<class T> constexpr decltype(auto) boost::hana::value()'
31 | constexpr decltype(auto) value() {
| ^~~~~
../boost/hana/value.hpp:31:30: note: template argument deduction/substitution failed:
../boost/hana/assert.hpp:232:10: error: template argument 1 is invalid
230 | static_assert(::boost::hana::value< \
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
231 | decltype(BOOST_HANA_PP_CONCAT(__hana_tmp_, __LINE__)) \
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
232 | >(), message); \
| ~^~
../boost/hana/assert.hpp:240:9: note: in expansion of macro 'BOOST_HANA_CONSTANT_CHECK_MSG'
240 | BOOST_HANA_CONSTANT_CHECK_MSG( \
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
../libs/hana/test/set/difference.cpp:30:5: note: in expansion of macro 'BOOST_HANA_CONSTANT_CHECK'
30 | BOOST_HANA_CONSTANT_CHECK(hana::equal(
| ^~~~~~~~~~~~~~~~~~~~~~~~~
../boost/hana/fwd/value.hpp:65:30: note: candidate: 'template<class T> constexpr decltype(auto) boost::hana::value(const T&)'
65 | constexpr decltype(auto) value(T const&)
| ^~~~~
../boost/hana/fwd/value.hpp:65:30: note: candidate expects 1 argument, 0 provided
../boost/hana/assert.hpp:227:9: error: template argument 1 is invalid
227 | >::value, \
| ^
../boost/hana/assert.hpp:240:9: note: in expansion of macro 'BOOST_HANA_CONSTANT_CHECK_MSG'
240 | BOOST_HANA_CONSTANT_CHECK_MSG( \
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
../libs/hana/test/set/difference.cpp:37:5: note: in expansion of macro 'BOOST_HANA_CONSTANT_CHECK'
37 | BOOST_HANA_CONSTANT_CHECK(hana::equal(
| ^~~~~~~~~~~~~~~~~~~~~~~~~
../boost/hana/assert.hpp:232:10: error: no matching function for call to 'value<<expression error> >()'
230 | static_assert(::boost::hana::value< \
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
231 | decltype(BOOST_HANA_PP_CONCAT(__hana_tmp_, __LINE__)) \
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
232 | >(), message); \
| ~^~
../boost/hana/assert.hpp:240:9: note: in expansion of macro 'BOOST_HANA_CONSTANT_CHECK_MSG'
240 | BOOST_HANA_CONSTANT_CHECK_MSG( \
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
../libs/hana/test/set/difference.cpp:37:5: note: in expansion of macro 'BOOST_HANA_CONSTANT_CHECK'
37 | BOOST_HANA_CONSTANT_CHECK(hana::equal(
| ^~~~~~~~~~~~~~~~~~~~~~~~~
../boost/hana/value.hpp:31:30: note: candidate: 'template<class T> constexpr decltype(auto) boost::hana::value()'
31 | constexpr decltype(auto) value() {
| ^~~~~
../boost/hana/value.hpp:31:30: note: template argument deduction/substitution failed:
../boost/hana/assert.hpp:232:10: error: template argument 1 is invalid
230 | static_assert(::boost::hana::value< \
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
231 | decltype(BOOST_HANA_PP_CONCAT(__hana_tmp_, __LINE__)) \
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
232 | >(), message); \
| ~^~
../boost/hana/assert.hpp:240:9: note: in expansion of macro 'BOOST_HANA_CONSTANT_CHECK_MSG'
240 | BOOST_HANA_CONSTANT_CHECK_MSG( \
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
../libs/hana/test/set/difference.cpp:37:5: note: in expansion of macro 'BOOST_HANA_CONSTANT_CHECK'
37 | BOOST_HANA_CONSTANT_CHECK(hana::equal(
| ^~~~~~~~~~~~~~~~~~~~~~~~~
../boost/hana/fwd/value.hpp:65:30: note: candidate: 'template<class T> constexpr decltype(auto) boost::hana::value(const T&)'
65 | constexpr decltype(auto) value(T const&)
| ^~~~~
../boost/hana/fwd/value.hpp:65:30: note: candidate expects 1 argument, 0 provided
../boost/hana/equal.hpp: In instantiation of 'constexpr auto boost::hana::equal_t::operator()(X&&, Y&&) const [with X = const boost::hana::test::ct_eq<1>&; Y = boost::hana::test::ct_eq<0>]':
../boost/hana/functional/partial.hpp:78:43: required from 'constexpr decltype(auto) boost::hana::partial_t<std::integer_sequence<long unsigned int, _Idx ...>, F, X ...>::operator()(Y&& ...) const & [with Y = {boost::hana::test::ct_eq<0>}; long unsigned int ...n = {0}; F = boost::hana::equal_t; X = {boost::hana::test::ct_eq<1>}]'
../boost/hana/functional/compose.hpp:71:18: required from 'constexpr decltype(auto) boost::hana::_compose<F, G>::operator()(X&&, Xs&& ...) const & [with X = boost::hana::test::ct_eq<0>; Xs = {}; F = boost::hana::not_t; G = boost::hana::partial_t<std::integer_sequence<long unsigned int, 0>, boost::hana::equal_t, boost::hana::test::ct_eq<1> >]'
../boost/hana/filter.hpp:105:34: required by substitution of 'template<class ... X> boost::hana::detail::filter_indices<static_cast<bool>(boost::hana::detail::decay<decltype((((const boost::hana::detail::make_filter_indices<boost::hana::_compose<boost::hana::not_t, boost::hana::partial_t<std::integer_sequence<long unsigned int, 0>, boost::hana::equal_t, boost::hana::test::ct_eq<1> > > >*)this)->boost::hana::detail::make_filter_indices<boost::hana::_compose<boost::hana::not_t, boost::hana::partial_t<std::integer_sequence<long unsigned int, 0>, boost::hana::equal_t, boost::hana::test::ct_eq<1> > > >::pred)(static_cast<X&&>(boost::hana::detail::make_filter_indices<Pred>::operator()::x))), typename std::remove_reference<decltype((((const boost::hana::detail::make_filter_indices<boost::hana::_compose<boost::hana::not_t, boost::hana::partial_t<std::integer_sequence<long unsigned int, 0>, boost::hana::equal_t, boost::hana::test::ct_eq<1> > > >*)this)->boost::hana::detail::make_filter_indices<boost::hana::_compose<boost::hana::not_t, boost::hana::partial_t<std::integer_sequence<long unsigned int, 0>, boost::hana::equal_t, boost::hana::test::ct_eq<1> > > >::pred)(static_cast<X&&>(boost::hana::detail::make_filter_indices<Pred>::operator()::x)))>::type>::type::value) ...> boost::hana::detail::make_filter_indices<boost::hana::_compose<boost::hana::not_t, boost::hana::partial_t<std::integer_sequence<long unsigned int, 0>, boost::hana::equal_t, boost::hana::test::ct_eq<1> > > >::operator()(X&& ...) const [with X = {boost::hana::test::ct_eq<0>, boost::hana::test::ct_eq<1>, boost::hana::test::ct_eq<2>}]'
../boost/hana/basic_tuple.hpp:135:39: required from 'static constexpr decltype(auto) boost::hana::unpack_impl<boost::hana::basic_tuple_tag>::apply(boost::hana::detail::basic_tuple_impl<std::integer_sequence<long unsigned int, _Idx ...>, Xn ...>&&, F&&) [with long unsigned int ...i = {0, 1, 2}; Xn = {boost::hana::test::ct_eq<0>, boost::hana::test::ct_eq<1>, boost::hana::test::ct_eq<2>}; F = boost::hana::detail::make_filter_indices<boost::hana::_compose<boost::hana::not_t, boost::hana::partial_t<std::integer_sequence<long unsigned int, 0>, boost::hana::equal_t, boost::hana::test::ct_eq<1> > > >]'
../boost/hana/unpack.hpp:47:29: required from 'constexpr decltype(auto) boost::hana::unpack_t::operator()(Xs&&, F&&) const [with Xs = boost::hana::basic_tuple<boost::hana::test::ct_eq<0>, boost::hana::test::ct_eq<1>, boost::hana::test::ct_eq<2> >; F = boost::hana::detail::make_filter_indices<boost::hana::_compose<boost::hana::not_t, boost::hana::partial_t<std::integer_sequence<long unsigned int, 0>, boost::hana::equal_t, boost::hana::test::ct_eq<1> > > >]'
../boost/hana/tuple.hpp:233:32: [ skipping 16 instantiation contexts, use -ftemplate-backtrace-limit=0 to disable ]
../boost/hana/unpack.hpp:47:29: required from 'constexpr decltype(auto) boost::hana::unpack_t::operator()(Xs&&, F&&) const [with Xs = boost::hana::set<boost::hana::test::ct_eq<1> >; F = boost::hana::detail::variadic_foldl1<const boost::hana::erase_key_t&, boost::hana::set<boost::hana::test::ct_eq<0>, boost::hana::test::ct_eq<1>, boost::hana::test::ct_eq<2> > >]'
../boost/hana/fold_left.hpp:79:32: required from 'static constexpr decltype(auto) boost::hana::fold_left_impl<T, boost::hana::when<condition> >::apply(Xs&&, S&&, F&&) [with Xs = boost::hana::set<boost::hana::test::ct_eq<1> >; S = boost::hana::set<boost::hana::test::ct_eq<0>, boost::hana::test::ct_eq<1>, boost::hana::test::ct_eq<2> >; F = const boost::hana::erase_key_t&; T = boost::hana::set_tag; bool condition = true]'
../boost/hana/fold_left.hpp:37:31: required from 'constexpr decltype(auto) boost::hana::fold_left_t::operator()(Xs&&, State&&, F&&) const [with Xs = boost::hana::set<boost::hana::test::ct_eq<1> >; State = boost::hana::set<boost::hana::test::ct_eq<0>, boost::hana::test::ct_eq<1>, boost::hana::test::ct_eq<2> >; F = const boost::hana::erase_key_t&]'
../boost/hana/set.hpp:317:35: required from 'static constexpr auto boost::hana::difference_impl<boost::hana::set_tag>::apply(Xs&&, Ys&&) [with Xs = boost::hana::set<boost::hana::test::ct_eq<0>, boost::hana::test::ct_eq<1>, boost::hana::test::ct_eq<2> >; Ys = boost::hana::set<boost::hana::test::ct_eq<1> >]'
../boost/hana/difference.hpp:29:33: required from 'constexpr auto boost::hana::difference_t::operator()(Xs&&, Ys&&) const [with Xs = boost::hana::set<boost::hana::test::ct_eq<0>, boost::hana::test::ct_eq<1>, boost::hana::test::ct_eq<2> >; Ys = boost::hana::set<boost::hana::test::ct_eq<1> >]'
../libs/hana/test/set/difference.cpp:45:5: required from here
../boost/hana/equal.hpp:50:28: error: 'apply' is not a member of 'Equal' {aka 'boost::hana::equal_impl<boost::hana::test::Integer<(boost::hana::test::Policy)17, void>, boost::hana::test::Integer<(boost::hana::test::Policy)17, void>, void>'}
50 | return Equal::apply(static_cast<X&&>(x), static_cast<Y&&>(y));
| ~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from ../boost/hana/functional/partial.hpp:13,
from ../boost/hana/fold_left.hpp:19:
../boost/hana/basic_tuple.hpp: In instantiation of 'static constexpr decltype(auto) boost::hana::unpack_impl<boost::hana::basic_tuple_tag>::apply(boost::hana::detail::basic_tuple_impl<std::integer_sequence<long unsigned int, _Idx ...>, Xn ...>&&, F&&) [with long unsigned int ...i = {0, 1, 2}; Xn = {boost::hana::test::ct_eq<0>, boost::hana::test::ct_eq<1>, boost::hana::test::ct_eq<2>}; F = boost::hana::detail::make_filter_indices<boost::hana::_compose<boost::hana::not_t, boost::hana::partial_t<std::integer_sequence<long unsigned int, 0>, boost::hana::equal_t, boost::hana::test::ct_eq<1> > > >]':
../boost/hana/unpack.hpp:47:29: required from 'constexpr decltype(auto) boost::hana::unpack_t::operator()(Xs&&, F&&) const [with Xs = boost::hana::basic_tuple<boost::hana::test::ct_eq<0>, boost::hana::test::ct_eq<1>, boost::hana::test::ct_eq<2> >; F = boost::hana::detail::make_filter_indices<boost::hana::_compose<boost::hana::not_t, boost::hana::partial_t<std::integer_sequence<long unsigned int, 0>, boost::hana::equal_t, boost::hana::test::ct_eq<1> > > >]'
../boost/hana/tuple.hpp:233:32: required from 'static constexpr decltype(auto) boost::hana::unpack_impl<boost::hana::tuple_tag>::apply(Xs&&, F&&) [with Xs = boost::hana::tuple<boost::hana::test::ct_eq<0>, boost::hana::test::ct_eq<1>, boost::hana::test::ct_eq<2> >; F = boost::hana::detail::make_filter_indices<boost::hana::_compose<boost::hana::not_t, boost::hana::partial_t<std::integer_sequence<long unsigned int, 0>, boost::hana::equal_t, boost::hana::test::ct_eq<1> > > >]'
../boost/hana/unpack.hpp:47:29: required from 'constexpr decltype(auto) boost::hana::unpack_t::operator()(Xs&&, F&&) const [with Xs = boost::hana::tuple<boost::hana::test::ct_eq<0>, boost::hana::test::ct_eq<1>, boost::hana::test::ct_eq<2> >; F = boost::hana::detail::make_filter_indices<boost::hana::_compose<boost::hana::not_t, boost::hana::partial_t<std::integer_sequence<long unsigned int, 0>, boost::hana::equal_t, boost::hana::test::ct_eq<1> > > >]'
../boost/hana/filter.hpp:123:29: required from 'static constexpr auto boost::hana::filter_impl<S, boost::hana::when<boost::hana::Sequence<S>::value> >::apply(Xs&&, const Pred&) [with Xs = boost::hana::tuple<boost::hana::test::ct_eq<0>, boost::hana::test::ct_eq<1>, boost::hana::test::ct_eq<2> >; Pred = boost::hana::_compose<boost::hana::not_t, boost::hana::partial_t<std::integer_sequence<long unsigned int, 0>, boost::hana::equal_t, boost::hana::test::ct_eq<1> > >; S = boost::hana::tuple_tag]'
../boost/hana/filter.hpp:48:29: required from 'constexpr auto boost::hana::filter_t::operator()(Xs&&, Pred&&) const [with Xs = boost::hana::tuple<boost::hana::test::ct_eq<0>, boost::hana::test::ct_eq<1>, boost::hana::test::ct_eq<2> >; Pred = boost::hana::_compose<boost::hana::not_t, boost::hana::partial_t<std::integer_sequence<long unsigned int, 0>, boost::hana::equal_t, boost::hana::test::ct_eq<1> > >]'
../boost/hana/remove.hpp:47:32: [ skipping 12 instantiation contexts, use -ftemplate-backtrace-limit=0 to disable ]
../boost/hana/unpack.hpp:47:29: required from 'constexpr decltype(auto) boost::hana::unpack_t::operator()(Xs&&, F&&) const [with Xs = boost::hana::set<boost::hana::test::ct_eq<1> >; F = boost::hana::detail::variadic_foldl1<const boost::hana::erase_key_t&, boost::hana::set<boost::hana::test::ct_eq<0>, boost::hana::test::ct_eq<1>, boost::hana::test::ct_eq<2> > >]'
../boost/hana/fold_left.hpp:79:32: required from 'static constexpr decltype(auto) boost::hana::fold_left_impl<T, boost::hana::when<condition> >::apply(Xs&&, S&&, F&&) [with Xs = boost::hana::set<boost::hana::test::ct_eq<1> >; S = boost::hana::set<boost::hana::test::ct_eq<0>, boost::hana::test::ct_eq<1>, boost::hana::test::ct_eq<2> >; F = const boost::hana::erase_key_t&; T = boost::hana::set_tag; bool condition = true]'
../boost/hana/fold_left.hpp:37:31: required from 'constexpr decltype(auto) boost::hana::fold_left_t::operator()(Xs&&, State&&, F&&) const [with Xs = boost::hana::set<boost::hana::test::ct_eq<1> >; State = boost::hana::set<boost::hana::test::ct_eq<0>, boost::hana::test::ct_eq<1>, boost::hana::test::ct_eq<2> >; F = const boost::hana::erase_key_t&]'
../boost/hana/set.hpp:317:35: required from 'static constexpr auto boost::hana::difference_impl<boost::hana::set_tag>::apply(Xs&&, Ys&&) [with Xs = boost::hana::set<boost::hana::test::ct_eq<0>, boost::hana::test::ct_eq<1>, boost::hana::test::ct_eq<2> >; Ys = boost::hana::set<boost::hana::test::ct_eq<1> >]'
../boost/hana/difference.hpp:29:33: required from 'constexpr auto boost::hana::difference_t::operator()(Xs&&, Ys&&) const [with Xs = boost::hana::set<boost::hana::test::ct_eq<0>, boost::hana::test::ct_eq<1>, boost::hana::test::ct_eq<2> >; Ys = boost::hana::set<boost::hana::test::ct_eq<1> >]'
../libs/hana/test/set/difference.cpp:45:5: required from here
../boost/hana/basic_tuple.hpp:135:39: error: no match for call to '(boost::hana::detail::make_filter_indices<boost::hana::_compose<boost::hana::not_t, boost::hana::partial_t<std::integer_sequence<long unsigned int, 0>, boost::hana::equal_t, boost::hana::test::ct_eq<1> > > >) (boost::hana::test::ct_eq<0>, boost::hana::test::ct_eq<1>, boost::hana::test::ct_eq<2>)'
135 | return static_cast<F&&>(f)(
| ~~~~~~~~~~~~~~~~~~~^
136 | detail::ebo_get<detail::bti<i>>(
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
137 | static_cast<detail::ebo<detail::bti<i>, Xn>&&>(xs)
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
138 | )...
| ~~~~
139 | );
| ~
In file included from ../boost/hana/remove.hpp:19,
from ../boost/hana/set.hpp:43,
from ../libs/hana/test/set/difference.cpp:8:
../boost/hana/filter.hpp:103:18: note: candidate: 'template<class ... X> boost::hana::detail::filter_indices<static_cast<bool>(boost::hana::detail::decay<decltype((((const boost::hana::detail::make_filter_indices<Pred>*)this)->boost::hana::detail::make_filter_indices<Pred>::pred)(static_cast<X&&>(boost::hana::detail::make_filter_indices<Pred>::operator()::x))), typename std::remove_reference<decltype((((const boost::hana::detail::make_filter_indices<Pred>*)this)->boost::hana::detail::make_filter_indices<Pred>::pred)(static_cast<X&&>(boost::hana::detail::make_filter_indices<Pred>::operator()::x)))>::type>::type::value) ...> boost::hana::detail::make_filter_indices<Pred>::operator()(X&& ...) const [with X = {X ...}; Pred = boost::hana::_compose<boost::hana::not_t, boost::hana::partial_t<std::integer_sequence<long unsigned int, 0>, boost::hana::equal_t, boost::hana::test::ct_eq<1> > >]'
103 | auto operator()(X&& ...x) const -> filter_indices<
| ^~~~~~~~
../boost/hana/filter.hpp:103:18: note: substitution of deduced template arguments resulted in errors seen above
../boost/hana/assert.hpp:227:9: error: template argument 1 is invalid
227 | >::value, \
| ^
../boost/hana/assert.hpp:240:9: note: in expansion of macro 'BOOST_HANA_CONSTANT_CHECK_MSG'
240 | BOOST_HANA_CONSTANT_CHECK_MSG( \
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
../libs/hana/test/set/difference.cpp:45:5: note: in expansion of macro 'BOOST_HANA_CONSTANT_CHECK'
45 | BOOST_HANA_CONSTANT_CHECK(hana::equal(
| ^~~~~~~~~~~~~~~~~~~~~~~~~
../boost/hana/assert.hpp:232:10: error: no matching function for call to 'value<<expression error> >()'
230 | static_assert(::boost::hana::value< \
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
231 | decltype(BOOST_HANA_PP_CONCAT(__hana_tmp_, __LINE__)) \
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
232 | >(), message); \
| ~^~
../boost/hana/assert.hpp:240:9: note: in expansion of macro 'BOOST_HANA_CONSTANT_CHECK_MSG'
240 | BOOST_HANA_CONSTANT_CHECK_MSG( \
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
../libs/hana/test/set/difference.cpp:45:5: note: in expansion of macro 'BOOST_HANA_CONSTANT_CHECK'
45 | BOOST_HANA_CONSTANT_CHECK(hana::equal(
| ^~~~~~~~~~~~~~~~~~~~~~~~~
../boost/hana/value.hpp:31:30: note: candidate: 'template<class T> constexpr decltype(auto) boost::hana::value()'
31 | constexpr decltype(auto) value() {
| ^~~~~
../boost/hana/value.hpp:31:30: note: template argument deduction/substitution failed:
../boost/hana/assert.hpp:232:10: error: template argument 1 is invalid
230 | static_assert(::boost::hana::value< \
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
231 | decltype(BOOST_HANA_PP_CONCAT(__hana_tmp_, __LINE__)) \
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
232 | >(), message); \
| ~^~
../boost/hana/assert.hpp:240:9: note: in expansion of macro 'BOOST_HANA_CONSTANT_CHECK_MSG'
240 | BOOST_HANA_CONSTANT_CHECK_MSG( \
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
../libs/hana/test/set/difference.cpp:45:5: note: in expansion of macro 'BOOST_HANA_CONSTANT_CHECK'
45 | BOOST_HANA_CONSTANT_CHECK(hana::equal(
| ^~~~~~~~~~~~~~~~~~~~~~~~~
../boost/hana/fwd/value.hpp:65:30: note: candidate: 'template<class T> constexpr decltype(auto) boost::hana::value(const T&)'
65 | constexpr decltype(auto) value(T const&)
| ^~~~~
../boost/hana/fwd/value.hpp:65:30: note: candidate expects 1 argument, 0 provided
../boost/hana/assert.hpp:227:9: error: template argument 1 is invalid
227 | >::value, \
| ^
../boost/hana/assert.hpp:240:9: note: in expansion of macro 'BOOST_HANA_CONSTANT_CHECK_MSG'
240 | BOOST_HANA_CONSTANT_CHECK_MSG( \
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
../libs/hana/test/set/difference.cpp:52:5: note: in expansion of macro 'BOOST_HANA_CONSTANT_CHECK'
52 | BOOST_HANA_CONSTANT_CHECK(hana::equal(
| ^~~~~~~~~~~~~~~~~~~~~~~~~
../boost/hana/assert.hpp:232:10: error: no matching function for call to 'value<<expression error> >()'
230 | static_assert(::boost::hana::value< \
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
231 | decltype(BOOST_HANA_PP_CONCAT(__hana_tmp_, __LINE__)) \
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
232 | >(), message); \
| ~^~
../boost/hana/assert.hpp:240:9: note: in expansion of macro 'BOOST_HANA_CONSTANT_CHECK_MSG'
240 | BOOST_HANA_CONSTANT_CHECK_MSG( \
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
../libs/hana/test/set/difference.cpp:52:5: note: in expansion of macro 'BOOST_HANA_CONSTANT_CHECK'
52 | BOOST_HANA_CONSTANT_CHECK(hana::equal(
| ^~~~~~~~~~~~~~~~~~~~~~~~~
../boost/hana/value.hpp:31:30: note: candidate: 'template<class T> constexpr decltype(auto) boost::hana::value()'
31 | constexpr decltype(auto) value() {
| ^~~~~
../boost/hana/value.hpp:31:30: note: template argument deduction/substitution failed:
../boost/hana/assert.hpp:232:10: error: template argument 1 is invalid
230 | static_assert(::boost::hana::value< \
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
231 | decltype(BOOST_HANA_PP_CONCAT(__hana_tmp_, __LINE__)) \
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
232 | >(), message); \
| ~^~
../boost/hana/assert.hpp:240:9: note: in expansion of macro 'BOOST_HANA_CONSTANT_CHECK_MSG'
240 | BOOST_HANA_CONSTANT_CHECK_MSG( \
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
../libs/hana/test/set/difference.cpp:52:5: note: in expansion of macro 'BOOST_HANA_CONSTANT_CHECK'
52 | BOOST_HANA_CONSTANT_CHECK(hana::equal(
| ^~~~~~~~~~~~~~~~~~~~~~~~~
../boost/hana/fwd/value.hpp:65:30: note: candidate: 'template<class T> constexpr decltype(auto) boost::hana::value(const T&)'
65 | constexpr decltype(auto) value(T const&)
| ^~~~~
../boost/hana/fwd/value.hpp:65:30: note: candidate expects 1 argument, 0 provided
../boost/hana/assert.hpp:227:9: error: template argument 1 is invalid
227 | >::value, \
| ^
../boost/hana/assert.hpp:240:9: note: in expansion of macro 'BOOST_HANA_CONSTANT_CHECK_MSG'
240 | BOOST_HANA_CONSTANT_CHECK_MSG( \
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
../libs/hana/test/set/difference.cpp:60:5: note: in expansion of macro 'BOOST_HANA_CONSTANT_CHECK'
60 | BOOST_HANA_CONSTANT_CHECK(hana::equal(
| ^~~~~~~~~~~~~~~~~~~~~~~~~
../boost/hana/assert.hpp:232:10: error: no matching function for call to 'value<<expression error> >()'
230 | static_assert(::boost::hana::value< \
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
231 | decltype(BOOST_HANA_PP_CONCAT(__hana_tmp_, __LINE__)) \
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
232 | >(), message); \
| ~^~
../boost/hana/assert.hpp:240:9: note: in expansion of macro 'BOOST_HANA_CONSTANT_CHECK_MSG'
240 | BOOST_HANA_CONSTANT_CHECK_MSG( \
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
../libs/hana/test/set/difference.cpp:60:5: note: in expansion of macro 'BOOST_HANA_CONSTANT_CHECK'
60 | BOOST_HANA_CONSTANT_CHECK(hana::equal(
| ^~~~~~~~~~~~~~~~~~~~~~~~~
../boost/hana/value.hpp:31:30: note: candidate: 'template<class T> constexpr decltype(auto) boost::hana::value()'
31 | constexpr decltype(auto) value() {
| ^~~~~
../boost/hana/value.hpp:31:30: note: template argument deduction/substitution failed:
../boost/hana/assert.hpp:232:10: error: template argument 1 is invalid
230 | static_assert(::boost::hana::value< \
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
231 | decltype(BOOST_HANA_PP_CONCAT(__hana_tmp_, __LINE__)) \
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
232 | >(), message); \
| ~^~
../boost/hana/assert.hpp:240:9: note: in expansion of macro 'BOOST_HANA_CONSTANT_CHECK_MSG'
240 | BOOST_HANA_CONSTANT_CHECK_MSG( \
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
../libs/hana/test/set/difference.cpp:60:5: note: in expansion of macro 'BOOST_HANA_CONSTANT_CHECK'
60 | BOOST_HANA_CONSTANT_CHECK(hana::equal(
| ^~~~~~~~~~~~~~~~~~~~~~~~~
../boost/hana/fwd/value.hpp:65:30: note: candidate: 'template<class T> constexpr decltype(auto) boost::hana::value(const T&)'
65 | constexpr decltype(auto) value(T const&)
| ^~~~~
../boost/hana/fwd/value.hpp:65:30: note: candidate expects 1 argument, 0 provided