我遇到了一个让我发疯的问题。我已经使用以下计时器条目结构实现了一个计时器:
typedef std::multimap<boost::posix_time::ptime, events::ITimeout*> TEntryMap;
TEntryMap entries_;
我将元素插入到多重映射中:
boost::posix_time::ptime tTimeout = boost::posix_time::microsec_clock::local_time() + boost::posix_time::milliseconds(timeout);
entries_.insert(std::make_pair(tTimeout, ptr)); // ptr is the events::ITimeout object
并在一个翻译单元(cpp 文件)中完美运行。但是,现在我需要将此功能移动到另一个 cpp 文件,现在我得到一个编译错误:
1>Build started 2013-02-07 15:38:18.
1>ClCompile:
1> EventDispatcher.cpp
1>c:\program files (x86)\microsoft visual studio 10.0\vc\include\utility(260): error C2678: binary '=' : no operator found which takes a left-hand operand of type 'const boost::posix_time::ptime' (or there is no acceptable conversion)
1> ....\boost\boost\date_time\posix_time\ptime.hpp(57): could be 'boost::posix_time::ptime &boost::posix_time::ptime::operator =(const boost::posix_time::ptime &)'
1> while trying to match the argument list '(const boost::posix_time::ptime, const boost::posix_time::ptime)'
1> c:\program files (x86)\microsoft visual studio 10.0\vc\include\utility(259) : while compiling class template member function 'std::pair<_Ty1,_Ty2> &std::pair<_Ty1,_Ty2>::operator =(std::pair<_Ty1,_Ty2> &&)'
1> with
1> [
1> _Ty1=const boost::posix_time::ptime,
1> _Ty2=events::ITimeout *
1> ]
1> ....\eventdispatcher.cpp(72) : see reference to class template instantiation 'std::pair<_Ty1,_Ty2>' being compiled
1> with
1> [
1> _Ty1=const boost::posix_time::ptime,
1> _Ty2=events::ITimeout *
1> ]
1>
我一无所知,为此苦苦挣扎了 2 个小时。我认为工作实施和非工作实施之间没有区别。相同的构造,相同的多图,相同的包含,相同的一切!;(