我有一个带有_rounds私有成员的Turn类。 _rounds是std唯一指针的二维std向量，指向另一个名为Animation的类：
Turn.h
std::vector<std::vector<std::unique_ptr<Animation>>> _rounds;
Animation.h
class Animation
{
public:
enum Type
{
MOVE,
ATTACK,
DIE,
FADEOUT,
MAX_TYPES
};
//Constructors
Animation();
Animation(Creature* creature, Animation::Type type, GameManager* gameManager, const std::function<void()> callback = nullptr);
//Getters
const int& getOriginRowClipsIndex() { return _originRowClipsIndex; }
bool& getFinished() { return _finished; }
Type& getType() { return _type; }
Creature& getCreature() { return *_creature; }
//Setters
void setOriginRowClipsIndex(int originRowClipsIndex) { _originRowClipsIndex = originRowClipsIndex; }
void animate();
void reset();
SDL_Rect* getClip(int index) {
return &_clips[index];
}
private:
GameManager* _gameManager;
Creature * _creature;
bool _finished;
unsigned int _clipIndex;
int _frequency;
int _originRowClipsIndex; //Origin index of anim clips.
std::vector<SDL_Rect> _clips;
Type _type;
std::function<void()> _callback;
};
#endif
我从代码的各个点动态分配动画，并尝试使用名为addAnimation的Turn公共方法将它们添加到Turn _rounds，如下所示：
auto animation = std::make_unique<Animation>(this, Animation::Type::MOVE, _gameManager);
turn.addAnimation(std::move(animation)); //Use move to make addAnimation take ownership of the animation.
然后，Turn addAnimation（）方法尝试将Animations添加到其成员_rounds中，如下所示：
Turn.cpp
void Turn::addAnimation(std::unique_ptr<Animation> animation)
{
unsigned int roundIndex;
//Set animating to true when the first animation is added to the first animation round. TODO: Move this elsewhere.
if (_rounds.size() == 0)
_animating = true;
if (animation->getType() == Animation::MOVE) { //All move animations go on first round.
roundIndex = 0;
if (animation->getCreature().isPlayer()) //Set _playerMoves to be able to set monster attacks on the correct round index.
{
_playerMoves = true;
}
}else if (animation->getType() == Animation::ATTACK)
{
roundIndex = _playerMoves ? _nAttacks + 1 : _nAttacks;
_nAttacks++; //Increment number of attacks.
}
else
{
roundIndex = _rounds.size();
}
//Check if the wanted round index already exists and create if not.
if (roundIndex >= _rounds.size()) {
//_rounds.push_back({});
_rounds.resize(_rounds.size() + 1);
}
//Add animation to animations vector.
_rounds[roundIndex].push_back(std::move(animation));
}
但是我收到一条错误消息，说我正在尝试引用已删除的函数，就像我尝试使用已删除的复制构造函数一样。
> 1>------ Build started: Project: Roguelike, Configuration: Debug Win32 ------
1> Turn.cpp
1>c:\program files (x86)\microsoft visual studio 14.0\vc\include\xmemory0(637): error C2280: 'std::unique_ptr<Animation,std::default_delete<_Ty>>::unique_ptr(const std::unique_ptr<_Ty,std::default_delete<_Ty>> &)': attempting to reference a deleted function
1> with
1> [
1> _Ty=Animation
1> ]
1> c:\program files (x86)\microsoft visual studio 14.0\vc\include\memory(1435): note: see declaration of 'std::unique_ptr<Animation,std::default_delete<_Ty>>::unique_ptr'
1> with
1> [
1> _Ty=Animation
1> ]
1> c:\program files (x86)\microsoft visual studio 14.0\vc\include\xmemory0(755): note: see reference to function template instantiation 'void std::allocator<_Ty>::construct<_Objty,std::unique_ptr<Animation,std::default_delete<Animation>>&>(_Objty *,std::unique_ptr<Animation,std::default_delete<Animation>> &)' being compiled
1> with
1> [
1> _Ty=std::unique_ptr<Animation,std::default_delete<Animation>>,
1> _Objty=std::unique_ptr<Animation,std::default_delete<Animation>>
1> ]
1> c:\program files (x86)\microsoft visual studio 14.0\vc\include\xmemory0(755): note: see reference to function template instantiation 'void std::allocator<_Ty>::construct<_Objty,std::unique_ptr<Animation,std::default_delete<Animation>>&>(_Objty *,std::unique_ptr<Animation,std::default_delete<Animation>> &)' being compiled
1> with
1> [
1> _Ty=std::unique_ptr<Animation,std::default_delete<Animation>>,
1> _Objty=std::unique_ptr<Animation,std::default_delete<Animation>>
1> ]
1> c:\program files (x86)\microsoft visual studio 14.0\vc\include\xmemory0(894): note: see reference to function template instantiation 'void std::allocator_traits<_Alloc>::construct<_Ty,std::unique_ptr<Animation,std::default_delete<Animation>>&>(std::allocator<_Ty> &,_Objty *,std::unique_ptr<Animation,std::default_delete<Animation>> &)' being compiled
1> with
1> [
1> _Alloc=std::allocator<std::unique_ptr<Animation,std::default_delete<Animation>>>,
1> _Ty=std::unique_ptr<Animation,std::default_delete<Animation>>,
1> _Objty=std::unique_ptr<Animation,std::default_delete<Animation>>
1> ]
1> c:\program files (x86)\microsoft visual studio 14.0\vc\include\xmemory0(893): note: see reference to function template instantiation 'void std::allocator_traits<_Alloc>::construct<_Ty,std::unique_ptr<Animation,std::default_delete<Animation>>&>(std::allocator<_Ty> &,_Objty *,std::unique_ptr<Animation,std::default_delete<Animation>> &)' being compiled
1> with
1> [
1> _Alloc=std::allocator<std::unique_ptr<Animation,std::default_delete<Animation>>>,
1> _Ty=std::unique_ptr<Animation,std::default_delete<Animation>>,
1> _Objty=std::unique_ptr<Animation,std::default_delete<Animation>>
1> ]
1> c:\program files (x86)\microsoft visual studio 14.0\vc\include\vector(1286): note: see reference to function template instantiation 'void std::_Wrap_alloc<std::allocator<_Ty>>::construct<std::unique_ptr<Animation,std::default_delete<Animation>>,std::unique_ptr<Animation,std::default_delete<Animation>>&>(_Ty *,std::unique_ptr<Animation,std::default_delete<Animation>> &)' being compiled
1> with
1> [
1> _Ty=std::unique_ptr<Animation,std::default_delete<Animation>>
1> ]
1> c:\program files (x86)\microsoft visual studio 14.0\vc\include\vector(1285): note: see reference to function template instantiation 'void std::_Wrap_alloc<std::allocator<_Ty>>::construct<std::unique_ptr<Animation,std::default_delete<Animation>>,std::unique_ptr<Animation,std::default_delete<Animation>>&>(_Ty *,std::unique_ptr<Animation,std::default_delete<Animation>> &)' being compiled
1> with
1> [
1> _Ty=std::unique_ptr<Animation,std::default_delete<Animation>>
1> ]
1> c:\program files (x86)\microsoft visual studio 14.0\vc\include\vector(1278): note: while compiling class template member function 'void std::vector<std::unique_ptr<Animation,std::default_delete<_Ty>>,std::allocator<std::unique_ptr<_Ty,std::default_delete<_Ty>>>>::push_back(const std::unique_ptr<_Ty,std::default_delete<_Ty>> &)'
1> with
1> [
1> _Ty=Animation
1> ]
1> c:\cpp\roguelike\roguelike\turn.cpp(44): note: see reference to function template instantiation 'void std::vector<std::unique_ptr<Animation,std::default_delete<_Ty>>,std::allocator<std::unique_ptr<_Ty,std::default_delete<_Ty>>>>::push_back(const std::unique_ptr<_Ty,std::default_delete<_Ty>> &)' being compiled
1> with
1> [
1> _Ty=Animation
1> ]
1> c:\cpp\roguelike\roguelike\turn.cpp(44): note: see reference to class template instantiation 'std::vector<std::unique_ptr<Animation,std::default_delete<_Ty>>,std::allocator<std::unique_ptr<_Ty,std::default_delete<_Ty>>>>' being compiled
1> with
1> [
1> _Ty=Animation
1> ]
========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========
我的代码中出现在模板错误长链末尾的唯一一点是push_back到addAnimation的唯一指针向量。
如果我尝试编译一个简化的案例，我甚至可以向Animation类添加自定义构造函数：
#include "stdafx.h"
#include <iostream>
#include <vector>
#include <memory>
class Animation
{
int _animation_value;
public:
Animation() {};
Animation(int animation_value)
: _animation_value(animation_value)
{}
};
class Turn
{
std::vector<std::vector<std::unique_ptr<Animation>>> _rounds;
public:
void addAnimation(std::unique_ptr<Animation> round)
{
_rounds.resize(_rounds.size() + 1);
_rounds[0].push_back(std::move(round));
}
};
class Other
{
public:
void foo()
{
auto x = std::make_unique<Animation>(7);
Turn turn;
turn.addAnimation(std::move(x));
}
};
int main()
{
Other other;
other.foo();
return 0;
}
任何帮助？
答案 0 :(得分：1)
你是否在代码中的任何地方复制了你的转弯类？因为，如评论中所述，addAnimation函数本身似乎没有错误。也许你生成一些代码，整个转弯类被复制，所以唯一指针的矢量矢量想要复制？