I have below code snippet where i declare a variable called pval which is attempting to derive T&& on a T* [ with T being int ]. As per type information [ decoded using abi ] the type derived is int*.
But when I compare the int* type with decltype(pval) it returns zero rather than 1 which means it treats pval as different type other than int*. So which one is the wrong pval being int* as reported by typeid or is_same which indicates comparison as false.
#include<iostream>
#include<string>
#include<typeinfo>
#include<cxxabi.h>
#include<type_traits>
using namespace std;
std::string classname(const std::type_info& info)
{
int status;
char* rslt=abi::__cxa_demangle(info.name(),0,0,&status);
std::string result(rslt);
free(rslt);
return result;
}
int main(int argc, char* argv[])
{
int* ptr = new int(10);
decltype(std::move(ptr)) pval = std::move(ptr);
cout << classname(typeid(pval)) << endl; // as per typeid information the type of pval is int*.
bool isSame = is_same<decltype(pval), int*>::value; // What then is the pval not same as int* as per is_same ?
cout << "isSame status = " << isSame << endl;
cout << is_same<int*, int*>::value << endl;
return(0);
}
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