[英]compiler error for shared_ptr in Visual Studio 2010
Converting a project from Codeblocks to Visual Studio I encountered this puzzling error from the compiler: 将项目从Codeblocks转换为Visual Studio我遇到了编译器的这个令人费解的错误:
Error 4 error C2228: left of '.swap' must have class/struct/union
shared_ptr.hpp
Error 3 error C2440: '<function-style-cast>' : cannot convert from
'boost::shared_ptr<T>' to 'boost::shared_ptr<T>' shared_ptr.hpp 384
Here's the code in question in boost's shared_ptr.hpp 这是boost的shared_ptr.hpp中的代码
template<class Y>
shared_ptr & operator=( shared_ptr<Y> && r ) // never throws
{
this_type( static_cast< shared_ptr<Y> && >( r ) ).swap( *this );
return *this;
}
I set up a similar but less complicated project and did not get the same error. 我设置了一个类似但不太复杂的项目,并没有得到相同的错误。
You probably try to swap two shared_ptr
of incompatible types. 您可能尝试交换两个不兼容类型的shared_ptr
。 Make sure that the two shared_ptr
point to objects of the same/convertible type. 确保两个shared_ptr
指向相同/可转换类型的对象。
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