Re: [boost] [BB++] Now fixes all of your memory leak nightmares

24 Jul 2017

      On 07/22/2017 04:20 AM, Domen Vrankar via Boost wrote:
...
2017-07-22 6:15 GMT+02:00 Phil Bouchard via Boost :
...
Greetings,
Now I have an example showing off the cyclic reference handling. Please
see:
https://github.com/philippeb8/root_ptr/blob/bb++/bbpp2cpp/tests/input2.bb
This program correctly outputs:
Document::Document(const boost::node_proxy&)
auto __0(boost::node_proxy&, int)
1
Document::Document(const boost::node_proxy&)
Document::~Document()
2
Document::~Document()
I just fixed an important bug where the node_proxies were passed by 
value because of the variadic template arguments misuse; now they are 
passed by reference in the 'make_*' factory.

Furthermore you can see by yourselves the following code example works 
perfectly fine now:

class Document
{
     auto head = nullptr<Document>();
     auto tail = nullptr<Document>();

     Document() { cout << __PRETTY_FUNCTION__ << endl; }
     ~Document() { cout << __PRETTY_FUNCTION__ << endl; }

     auto foo = function (int argument) { cout << __PRETTY_FUNCTION__ << 
endl; return argument; };
};

int main()
{
     auto temporary = 1;

     auto document = new Document();
     document.foo(temporary);

     auto bar = function ()
     {
         auto document = new Document();

         // cycle
         document.head = document;

         return document;
     };

     cout << 1 << endl;
     auto result = bar().foo(temporary);
     cout << 2 << endl;
}

Correctly outputs:

Document::Document(const boost::node_proxy&)
auto __lambda0(boost::node_proxy&, int)
1
Document::Document(const boost::node_proxy&)
auto __lambda0(boost::node_proxy&, int)
2
Document::~Document()
Document::~Document()

Thank you,
-Phil