JSON Classes array basic_parser key_value_pair object monotonic_resource parser parse_options serializer static_resource storage_ptr string value value_ref value_stack Functions get make_counted_resource number_cast parse serialize swap value_from value_to Type Traits has_value_from has_value_to is_deallocate_trivial value_from_tag value_to_tag Operators operator== operator!= operator< operator<= operator>= operator> operator<< Constants array_kind condition error kind object_kind string_kind Aliases error_category error_code error_condition generic_category memory_resource polymorphic_allocator string_view system_error P0308R0 pilfer pilfered is_pilfer_constructible