[boost] shared_ptr operator bool

[Giovanni Bajo]

Hello,

I have observed a strange behaviour with shared_ptr:

struct A
{
   shared_ptr<int> ptr;

   operator bool()
   { return ptr; }
};

A a;
a.ptr.reset(new int);
assert(a.ptr);
assert(a);

Now, the second assertion fails (Comeau). It works if for example I change
my operator bool into "return ptr ? true : false;". This is
counter-intuitive to me. Can anybody explain me why?

Giovanni Bajo

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