我得到一个错误发生在'xutility'类-它是锁定的,因为我没有创建它
error C2582: 'operator =' function is unavailable in 'Agent'
错误指向代码中的以下几行:
// TEMPLATE FUNCTION move
template<class _InIt,
class _OutIt> inline
_OutIt _Move(_InIt _First, _InIt _Last,
_OutIt _Dest, _Nonscalar_ptr_iterator_tag)
{ // move [_First, _Last) to [_Dest, ...), arbitrary iterators
for (; _First != _Last; ++_Dest, ++_First)
*_Dest = _STD move(*_First); // this line has the error
return (_Dest);
}
为什么会发生这种情况?这意味着什么,我该如何解决?
编辑-这是我从输出中抓取的,有人能帮助我理解这一点吗?对不起,我是一个完全的新手…
1>------ Build started: Project: D3D10DEMO, Configuration: Debug Win32 ------
1> Level.cpp
1>c:usersasherdocumentsmy dropboxdirect3dd3d10demo_1.0d3d10demolevel.cpp(449): warning C4018: '<' : signed/unsigned mismatch
1> Brain.cpp
1>c:usersasherdocumentsmy dropboxdirect3dd3d10demo_1.0d3d10demobrain.cpp(43): warning C4413: 'Brain::nodes' : reference member is initialized to a temporary that doesn't persist after the constructor exits
1> c:usersasherdocumentsmy dropboxdirect3dd3d10demo_1.0d3d10demobrain.h(34) : see declaration of 'Brain::nodes'
1>c:usersasherdocumentsmy dropboxdirect3dd3d10demo_1.0d3d10demobrain.cpp(43): warning C4413: 'Brain::roomNodeVectors' : reference member is initialized to a temporary that doesn't persist after the constructor exits
1> c:usersasherdocumentsmy dropboxdirect3dd3d10demo_1.0d3d10demobrain.h(35) : see declaration of 'Brain::roomNodeVectors'
1>c:program files (x86)microsoft visual studio 10.0vcincludexutility(2514): error C2582: 'operator =' function is unavailable in 'Agent'
1> c:program files (x86)microsoft visual studio 10.0vcincludexutility(2535) : see reference to function template instantiation '_OutIt std::_Move<_InIt,_OutIt> (_InIt,_InIt,_OutIt,std::_Nonscalar_ptr_iterator_tag)' being compiled
1> with
1> [
1> _OutIt=Agent *,
1> _InIt=Agent *
1> ]
1> c:program files (x86)microsoft visual studio 10.0vcincludevector(1170) : see reference to function template instantiation '_OutIt std::_Move<Agent*,Agent*>(_InIt,_InIt,_OutIt)' being compiled
1> with
1> [
1> _OutIt=Agent *,
1> _InIt=Agent *
1> ]
1> c:program files (x86)microsoft visual studio 10.0vcincludevector(1165) : while compiling class template member function 'std::_Vector_iterator<_Myvec> std::vector<_Ty>::erase(std::_Vector_const_iterator<_Myvec>)'
1> with
1> [
1> _Myvec=std::_Vector_val<Agent,std::allocator<Agent>>,
1> _Ty=Agent
1> ]
1> c:usersasherdocumentsmy dropboxdirect3dd3d10demo_1.0d3d10demobrain.h(41) : see reference to class template instantiation 'std::vector<_Ty>' being compiled
1> with
1> [
1> _Ty=Agent
1> ]
1>c:program files (x86)microsoft visual studio 10.0vcincludexutility(2514): error C2582: 'operator =' function is unavailable in 'Pickup'
1> c:program files (x86)microsoft visual studio 10.0vcincludexutility(2535) : see reference to function template instantiation '_OutIt std::_Move<_InIt,_OutIt>(_InIt,_InIt,_OutIt,std::_Nonscalar_ptr_iterator_tag)' being compiled
1> with
1> [
1> _OutIt=Pickup *,
1> _InIt=Pickup *
1> ]
1> c:program files (x86)microsoft visual studio 10.0vcincludevector(1170) : see reference to function template instantiation '_OutIt std::_Move<Pickup*,Pickup*>(_InIt,_InIt,_OutIt)' being compiled
1> with
1> [
1> _OutIt=Pickup *,
1> _InIt=Pickup *
1> ]
1> c:program files (x86)microsoft visual studio 10.0vcincludevector(1165) : while compiling class template member function 'std::_Vector_iterator<_Myvec> std::vector<_Ty>::erase(std::_Vector_const_iterator<_Myvec>)'
1> with
1> [
1> _Myvec=std::_Vector_val<Pickup,std::allocator<Pickup>>,
1> _Ty=Pickup
1> ]
1> c:usersasherdocumentsmy dropboxdirect3dd3d10demo_1.0d3d10demobrain.h(44) : see reference to class template instantiation 'std::vector<_Ty>' being compiled
1> with
1> [
1> _Ty=Pickup
1> ]
1> Generating Code...
========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========
您似乎正在调用标准库的函数模板,其类型Agent
不能被移动赋值,但调用的算法需要这样做。
正如Als在您的问题的评论中所说,您需要显示调用该算法的代码。
当然您需要提供代理类。
假设c++ 11,你需要实现
struct Agent
{
// .... other stuff
Agent(Agent&& other) { /* ... */ }
Agent& operator=(Agent&& other) { /* ... */ return *this; }
};
,称为移动赋值操作符。这时,您可能想要在move构造函数和move构造函数齐头并进时实现它们:
Agent(Agent&& other) { /* ... */ }
推荐阅读:
- http://en.wikipedia.org/wiki/C%2B%2B11 Rvalue_references_and_move_constructors
- http://akrzemi1.wordpress.com/2011/08/11/move-constructor/
和其他