C2065: 'class' undeclared identifier, header included - c++

Question

I wanted to run the game by testing the spawner. I thought that I had properly declared the Spawner class by calling its header file in SceneGame.hpp
When I wanted to use the Spawner* as a vector variable, I thought there would be no compiler errors, but I was wrong.
The source of the error comes from declaring the variable vector spawner_list
Relevant files:
Spawner.hpp
#pragma once
#include <SFML\Graphics.hpp>
#include "weapon.hpp"
#include "movement.hpp"
// forward declare
class EnemyTemplate;
/*
Spawner will create enemies and/or power ups
For spawning enemies, they will recieve one weapon and one movement type
for powerups, only one will spawn and the spawner would disappear afterwards
The spawner will create entities through the following:
Spawn gap: the amount of time to wait between making enemies, in frame ticks
Spawn limit: the amount of enemies to make before being removed
*/
class Spawner{
private:
int spawnGapTime;
int spawnGapSet;
// If you plan to spawn finite enemies, then use constructor
int spawnLimit = -1;
EnemyTemplate* enemyData;
Weapon* givenWeapon;
Movement* givenMovement;
int ticks;
public:
Spawner(Weapon*, Movement*, EnemyTemplate*, std::vector <int>);
void update();
void spawn_enemy();
void spawn_count();
~Spawner(){
delete givenWeapon;
delete givenMovement;
delete enemyData;
};
};
SceneGame.hpp
#pragma once
#include <SFML\Graphics.hpp>
#include "scene.hpp"
#include "game.hpp"
#include "entity.hpp"
#include "movement.hpp"
#include "weapon.hpp"
#include "player.hpp"
#include "collisionGrid.hpp"
#include "spawner.hpp"
// forward declare
class BulletTemplate;
class SceneGame : public Scene{
private:
// skipping some code
std::vector <Spawner*> spawner_list; // The source of the error
public:
SceneGame(Game* game);
// skipping some code
};
Is there any way I can fix this undeclared identifier problem without having to forward declare Spawner?

Answer 1

C2065: 'class' undeclared identifier
If that is the literal text of the error message, you're compiling as C, not as C++.
If it isn't the literal text of the error message, you should have posted the literal text of the error message.