https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95181
--- Comment #3 from ahmet özhan <tahasuf at gmail dot com> --- Comment on attachment 48554 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=48554 gcc 10 don't compile but clang compile >#include <array> > >namespace math { > > template <typename T, std::size_t Row, std::size_t Col> > requires std::is_arithmetic_v<T> > class matrix { > union { > std::array<T, Row * Col> m_elements_1d; > std::array<std::array<T, Col>, Row> m_elements_2d; > }; > > public: > template <typename ...Args> > requires > std::conjunction_v<std::is_same<T, Args>...> > constexpr matrix(const Args&... args) noexcept > : m_elements_1d {{ args... }} {} > > template <typename ...Args> > requires > std::conjunction_v<std::is_same<std::array<T, Col>, > Args>...> > constexpr matrix(const Args&... args) noexcept > : m_elements_2d {{ args... }} {} > }; >} > >#include <iostream> > >template <typename T> >void test() { > > T f1, f2, f3, f4, f5, f6, f7, f8; > > std::cin >> f1 >> f2 >> f3 >> f4 >> f5 >> f6 >> f7 >> f8; > math::matrix<T, 4, 4> m0( > std::array<T, 4> {{ f1, f2, f3, f4 }}, > std::array<T, 4> {{ f5, f6, f7, f8 }} > ); >} > >int main(int argc, char **argv) >{ > test<float>(); > return 0; >}
