30 #ifndef CEREAL_TYPES_STD_VARIANT_HPP_
31 #define CEREAL_TYPES_STD_VARIANT_HPP_
39 namespace variant_detail
42 template <
class Archive>
48 void operator()(T
const & value)
const
57 template<
int N,
class Variant,
class ... Args,
class Archive>
58 typename std::enable_if<N == std::variant_size_v<Variant>,
void>::type
59 load_variant(Archive & ,
int , Variant & )
61 throw ::cereal::Exception(
"Error traversing variant during load");
64 template<
int N,
class Variant,
class H,
class ... T,
class Archive>
65 typename std::enable_if<N < std::variant_size_v<Variant>,
void>::type
66 load_variant(Archive & ar,
int target, Variant & variant)
72 variant = std::move(value);
75 load_variant<N+1, Variant, T...>(ar, target, variant);
81 template <
class Archive,
typename VariantType1,
typename... VariantTypes>
inline
84 std::int32_t index = static_cast<std::int32_t>(variant.index());
87 std::visit(visitor, variant);
91 template <
class Archive,
typename... VariantTypes>
inline
94 using variant_t =
typename std::variant<VariantTypes...>;
98 if(index >= static_cast<std::int32_t>(std::variant_size_v<variant_t>))
99 throw Exception(
"Invalid 'index' selector when deserializing std::variant");
101 variant_detail::load_variant<0, variant_t, VariantTypes...>(ar, index, variant);
105 template <
class Archive>
109 #endif // CEREAL_TYPES_STD_VARIANT_HPP_