Re: [Boost-users] Safe to pass dereferenced anonymous shared_ptr?

2013/11/6 Chris Stankevitz

Q1: Is the below code dangerous? A1: Only if the anonymous shared_ptr is deleted before function f returns.

Q2: Is the anonymous shared_ptr deleted before function f returns? A2: ?

Thank you,

Chris

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#include <iostream> #include

void f(const int& i) { std::cout << "i = " << i << std::endl; }

int main() { f(*boost::make_shared<int>(42));

return 0; }

I don't think this particular use is dangerous, but does it make sense? I can't imagine why would you ever want to do that. In your (simplified I presume) example you don't share anything, you don't even need a pointer at all. In your real example you probably have some class with a user-defined constructor instead of int, but can't you do: f( int(42) ); HTH, Kris