#ifndef BUILDINGORG_H
#define BUILDINGORG_H
#include <iostream>
#include <memory>
#include <vector>
class BuildingOrg
{
public:
BuildingOrg(int _id);
virtual int addBuildingComponent(std::shared_ptr<BuildingOrg> buildingOrg,
std::string _type) const;
virtual void removeBuildingComponent(std::shared_ptr<BuildingOrg> buildingOrg);
virtual void getInfo()=0;
private:
int id;
std::string type;
};
#endif // BUILDINGORG_H
#ifndef BUILDINGCOMPONENT_H
#define BUILDINGCOMPONENT_H
#include "buildingorg.h"
class BuildingComponent : public BuildingOrg
{
public:
BuildingComponent(int _id);
int addBuildingComponent(std::shared_ptr<BuildingOrg> _buildingOrg,
std::string _type) const override;
void removeBuildingComponent(std::shared_ptr<BuildingOrg> buildingOrg)
override;
void getInfo() override;
private:
std::vector<std::shared_ptr<BuildingOrg>> building_Org;
};
#endif // BUILDINGCOMPONENT_H
#include "buildingcomponent.h"
BuildingComponent::BuildingComponent(int _id):
BuildingOrg(_id)
{
}
int BuildingComponent::addBuildingComponent(std::shared_ptr<BuildingOrg> _buildingOrg, std::string _type) const
{
building_Org.push_back(_buildingOrg);// I am having error here
return 1;
}
void BuildingComponent::removeBuildingComponent(std::shared_ptr<BuildingOrg> buildingOrg)
{
}
void BuildingComponent::getInfo()
{
}
When I try to put shared pointer in my Vector I get this nasty error; I really don't know why I am getting the error:
cpp:10: error: passing 'const std::vector<std::shared_ptr<BuildingOrg> >' as 'this' argument of 'void std::vector<_Tp, _Alloc>::push_back(const value_type&) [with _Tp = std::shared_ptr<BuildingOrg>; _Alloc = std::allocator<std::shared_ptr<BuildingOrg> >; std::vector<_Tp, _Alloc>::value_type = std::shared_ptr<BuildingOrg>]' discards qualifiers [-fpermissive] building_Org.push_back(_buildingOrg);
I don’t understand what is it saying.
addBuildingComponent()
is a const
method. within its scope, *this
is const
, and so this->building_Org
is const
.
std::vector::push_back()
is a non-const
method. So it can't be called in a context where the vector is const
.