type_name.h

#pragma once
 
#include <cstdlib>
#include <string>
#include <type_traits>
#include <typeinfo>
 
#ifndef _MSC_VER
#include <cxxabi.h>
#endif
 
namespace beast {
 
template <typename T>
std::string
typeName()
{
    using TR = std::remove_reference_t<T>;
 
    std::string name = typeid(TR).name();
 
#ifndef _MSC_VER
    if (auto s = abi::__cxa_demangle(name.c_str(), nullptr, nullptr, nullptr))
    {
        name = s;
        std::free(s);
    }
#endif
 
    if (std::is_const_v<TR>)
        name += " const";
    if (std::is_volatile_v<TR>)
        name += " volatile";
    if (std::is_lvalue_reference_v<T>)
    {
        name += "&";
    }
    else if (std::is_rvalue_reference_v<T>)
    {
        name += "&&";
    }
 
    return name;
}
 
}  // namespace beast