这个错误是什么意思？” 在模板中：调用 &#39;std::unique_ptr 的已删除构造函数<InventoryElements> &quot;

Question

this is the class with all the methods.

#include "InventoryElements.h"
class Inventory{
public:
    explicit Inventory(int max) : MaxElements(max){
        myInventory.resize(max);
        NumElements=0;
    }

    void suf_insert(unique_ptr<InventoryElements> element);
    void generic_insert(unique_ptr<InventoryElements> element, vector<  unique_ptr<InventoryElements>>::iterator pos);

    void remove(unique_ptr<InventoryElements> element,vector< unique_ptr<InventoryElements>>::iterator pos);

private:
    int MaxElements;
    vector<unique_ptr<InventoryElements>> myInventory;
    int NumElements;
};
void Inventory::suf_insert(std::unique_ptr<InventoryElements> element) {
    if (NumElements < MaxElements){
        myInventory.push_back(element); // here the error
        
    else
        std::cout<<"Ops.. your Inventory is full, remove an element first"<< endl;
}

and this is the implementation of the first method, a suf_insert, the error call to deleted constructor of 'std::unique_ptr",

how can i solve this?

Answer 1

Because a std::unique_ptr can not be copied , you will need to move your unique_ptr into your vector.

    myInventory.push_back( std::move(element) ); // no more error

After this line, element will no longer point to your element, as your std::vector will now contain the unique pointer.