Print demangled type of a variable in C++

__cxa_demangle.cpp

//
// Created by tejag on 2024-04-26.
//

#include <iostream>
#include <type_traits>
#include <typeinfo>
#include <cstdint>
#include <cxxabi.h>

template<typename T>
void printType() {
  std::cout << abi::__cxa_demangle(typeid(T).name(), NULL, NULL, NULL);
}

int main() {
  using Type = std::common_type<uint32_t, int64_t>::type;
  Type a = static_cast<decltype(a)>(0);
  int b = 0;

  printType<decltype(a)>();
  std::cout << " ";
  // printType<decltype(b)>();
  std::cout << std::endl;

  return 0;
}