variantAny.cpp

#define NO_SCALAR_REFERENCES_USED_IN_PATTERNS 1

#include "matchit.h"
#include <iostream>

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"});

template <typename T>
constexpr auto print(T const &v)
{
  using namespace matchit;
  Id<char const *> c;
  Id<int32_t> i;
  return match(v)(
      // clang-format off
        pattern | as<char const *>(c) = [&] { std::cout << "char const *: " << *c << std::endl;},
        pattern | as<int32_t>(i)      = [&] { std::cout << "int32_t: " << *i << std::endl;}
      // clang-format on
  );
}

int32_t main()
{
  std::variant<char const *, int32_t> v = 5;
  print(v);
  v = "123";
  print(v);
  std::any a = "arr";
  print(a);
  return 0;
}