CODEWITHSUNDEEP
c++visual-studio
Gawndy
Gawndy

Reputation: 159

Visual studio cannot determine the type of my global variables

What I have is :

    #include "thread.h"
    #include <iostream>
    #include <fstream>
    #include <vector>
    #include <string>

    using namespace std;

    vector<Requester*> requesters; //global

    struct Requester {
       vector<thread> t;
       vector<int> tracks;
    };

Then in my function I have: 

void serviceQ(){
  vector<Requester*> test = requesters; //error
}

The error is: 

no suitable user-defined conversion from "std::vector<<error-type> *, std::allocator<<error-type> *>>" to "std::vector<Requester *, std::allocator<Requester *>>" exists

I'm very confused as to why this is. Why does it call my global variable an error type in the function? If I were to do something like:

void serviceQ(){
      vector<Requester*> test; 
      //do some stuff
      vector<Requester*> result = test; //no error
    }

Then there is no error.

Upvotes: 0

Views: 72

Answers (1)

vsoftco
vsoftco

Reputation: 56567

You need to define

vector<Requester*> requesters; //global

after the definition of struct Requester, as otherwise the compiler doesn't know what Requester* means when it attempts to define the corresponding vector<Requester*>. Alternatively, you can just declare

struct Requester;

above the line vector<Requester*> requesters;.

Upvotes: 3

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