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fix false positive warning on GCC 14 #58

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fix false positive warning on GCC 14 #58

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8 changes: 8 additions & 0 deletions include/boost/variant2/variant.hpp
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Original file line number Diff line number Diff line change
Expand Up @@ -752,9 +752,17 @@ template<class T1, class... T> union variant_storage_impl<mp11::mp_true, T1, T..
T1 first_;
variant_storage<T...> rest_;

#if defined(BOOST_GCC) && (__GNUC__ >= 14)
# pragma GCC diagnostic push
// False positive in at least GCC 14 with -O3 (via result<T>)
# pragma GCC diagnostic ignored "-Wmaybe-uninitialized"
#endif
template<class... A> constexpr variant_storage_impl( mp11::mp_size_t<0>, A&&... a ): first_( std::forward<A>(a)... )
{
}
#if defined(BOOST_GCC) && (__GNUC__ >= 14)
# pragma GCC diagnostic pop
#endif

template<std::size_t I, class... A> constexpr variant_storage_impl( mp11::mp_size_t<I>, A&&... a ): rest_( mp11::mp_size_t<I-1>(), std::forward<A>(a)... )
{
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