14#ifndef dealii_cxx17_variant_h
15#define dealii_cxx17_variant_h
19#ifdef DEAL_II_EARLY_DEPRECATIONS
21 "This file is deprecated. Simply use the corresponding C++17 header <variant>.")
30 using std::holds_alternative;
#define DEAL_II_NAMESPACE_OPEN
#define DEAL_II_WARNING(desc)
#define DEAL_II_NAMESPACE_CLOSE