Function getClassName

sample/variantAny.cpp:5–14

template <typename T>
constexpr auto getClassName(T const &v)
{
  using namespace matchit;
  return match(v)(
      // clang-format off
        pattern | as<char const *>(_) = expr("chars"),
        pattern | as<int32_t>(_)      = expr("int32_t")
      // clang-format on
  );
}

constexpr std::variant<int32_t, char const *> cv = 123;
static_assert(getClassName(cv) == std::string_view{"int32_t"});