我的環境是Visual Stuido 2013,VC12,Boost 1.59。 下面的代碼(真正的代碼,最小的攝製):Boost可選Boost線程編譯問題
#include "boost/thread.hpp"
#include "boost/optional.hpp"
class MyClass
{
public:
template <typename T>
operator const T&() const;
};
boost::optional<MyClass> foo()
{
boost::optional<MyClass> res;
return res;
}
int main(int argc)
{
foo();
}
無法編譯,錯誤:
1>------ Build started: Project: TestBoostOptional, Configuration: Debug x64 ------ 1> main.cpp 1>c:\workspace\third_party\boost_1_59_0\boost/optional/optional.hpp(297): error C2664: 'void boost::optional_detail::optional_base::construct(MyClass &&)' : cannot convert argument 1 from 'boost::detail::thread_move_t' to 'const MyClass &' 1> with 1> [ 1> T=MyClass 1> ] 1> Reason: cannot convert from 'boost::detail::thread_move_t' to 'const MyClass' 1> with 1> [ 1> T=MyClass 1> ] 1> No user-defined-conversion operator available that can perform this conversion, or the operator cannot be called 1> c:\workspace\third_party\boost_1_59_0\boost/optional/optional.hpp(292) : while compiling class template member function 'boost::optional_detail::optional_base::optional_base(boost::optional_detail::optional_base &&)' 1> with 1> [ 1> T=MyClass 1> ] 1> c:\workspace\third_party\boost_1_59_0\boost/optional/optional.hpp(873) : see reference to function template instantiation 'boost::optional_detail::optional_base::optional_base(boost::optional_detail::optional_base &&)' being compiled 1> with 1> [ 1> T=MyClass 1> ] 1> c:\workspace\third_party\boost_1_59_0\boost/optional/optional.hpp(766) : see reference to class template instantiation 'boost::optional_detail::optional_base' being compiled 1> with 1> [ 1> T=MyClass 1> ] 1> main.cpp(14) : see reference to class template instantiation 'boost::optional' being compiled
注意#include "boost/thread.hpp"
。刪除代碼時包括代碼編譯。任何可以解決的辦法?
令人印象深刻的回答。我不知道的東西。並有有用的文檔報價和鏈接。我們還可以要求什麼:) – sehe
接受這個,另一個選擇是'#define BOOST_THREAD_VERSION 3'。然而這並不能解釋爲什麼會發生這種情況 –