GetTypeName

#include <iostream>
#include <cassert>
#include <string>

namespace GetTypeName_Impl {
template <typename T>
class GetTypeName {
public:
  static std::string get() {
    static std::string pattern =
      "static const char* GetTypeName_Impl::GetTypeName<T>::raw() [with T = ";
    std::string res = raw();
    assert(res.size() > pattern.size() && res.substr(0, pattern.size()) == pattern);
    return res.substr(pattern.size(), res.size() - pattern.size() - 1);
  }

private:
  static const char *raw() {
    return __PRETTY_FUNCTION__;
  }
};
}

template <typename T>
std::string getTypeName(const T &) {
  return GetTypeName_Impl::GetTypeName<T>::get();
}

int main() {
  std::cout << getTypeName(42) << " " << getTypeName("hello") << std::endl;
}