14 Jul
2006
14 Jul
'06
5:27 a.m.
In file <boost/shared_ptr.hpp>, I find the following function: /begin quote template<class Y, class D> shared_ptr(Y * p, D d): px(p), pn(p, d) { detail::sp_enable_shared_from_this( pn, p, p ); } /end quote If I use it as follows:"boost::shared_ptr<Investment> pInv(0,getRidOfInvestment)",it will not compile.But when I use:"boost::shared_ptr<Investment> pInv(static_cast<Investment*>(0),getRidOfInvestment)",it can be compiled. The constructor's first parameter is Y*,i.e.,a pointer to Y.And 0 can be interpreted as a pointer to Y,too. Why can't zero be treated as a pointer to Y here? I will be appreciative if anyone can give me some suggestions.Thank you! hzhuo July,14th