boost::shared_ptrでエラー no matching function for call

このドキュメントの内容は、以下の通りです。

• ソース
• コンパイルエラー

ソース

boost::shared_ptr<X> x (  new X() );
x_.reset (x);

コンパイルエラー

g++ shared_ptr_class.cpp -I/usr/local/include
shared_ptr_class.cpp: In constructor 'C::C()':
shared_ptr_class.cpp:30: error: no matching function for call to 'boost::shared_ptr<X>::reset(boost::shared_ptr<X>&) const'
/usr/local/include/boost/smart_ptr/shared_ptr.hpp:390: note: candidates are: void boost::shared_ptr<T>::reset() [with T = X]
gmake: *** [shared_ptr_class_gpp] エラー 1

/usr/bin/clang++ shared_ptr_class.cpp -I/usr/local/include
shared_ptr_class.cpp:30:7: error: no matching member function for call to 'reset'
                        x_.reset (x);
                        ~~~^~~~~
/usr/local/include/boost/smart_ptr/shared_ptr.hpp:395:28: note: candidate template ignored: failed template argument deduction
    template<class Y> void reset(Y * p) // Y must be complete
                           ^
/usr/local/include/boost/smart_ptr/shared_ptr.hpp:401:37: note: candidate function template not viable: requires 2 arguments, but 1 was provided
    template<class Y, class D> void reset( Y * p, D d )
                                    ^
/usr/local/include/boost/smart_ptr/shared_ptr.hpp:406:46: note: candidate function template not viable: requires 3 arguments, but 1 was provided
    template<class Y, class D, class A> void reset( Y * p, D d, A a )
                                             ^
/usr/local/include/boost/smart_ptr/shared_ptr.hpp:411:28: note: candidate function template not viable: requires 2 arguments, but 1 was provided
    template<class Y> void reset( shared_ptr<Y> const & r, T * p )
                           ^
/usr/local/include/boost/smart_ptr/shared_ptr.hpp:390:10: note: candidate function not viable: requires 0 arguments, but 1 was provided
    void reset() // never throws in 1.30+
         ^
1 error generated.
gmake: *** [shared_ptr_class] エラー 1