Re: shared_ptr in Error class

Posted by Luigi Ballabio on Apr 10, 2011; 11:39am
URL: http://quantlib.414.s1.nabble.com/shared-ptr-in-Error-class-tp13384p13387.html


On Apr 10, 2011, at 11:02 AM, Kakhkhor Abdijalilov wrote:
> I think smart pointer is not needed, since exception objects should be
> passed by reference. Following "less is more" principle the shared
> pointer to string could be replaced by a plain string.

They are caught by reference, but thrown by copy.  If you try compiling

class Foo {
   public:
     Foo() {}
   private:
     Foo(const Foo&);
};


int main() {
     try {
         throw Foo();
     catch (Foo&) {}
     return 0;
}

the compiler (well, gcc at least) will complain that the copy  
constructor is private at the "throw" line.

Luigi



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