> On 18 Aug 2016, at 21:07, Min Wang <mingew...@gmail.com> wrote:
> Could you explain more on "reference count” ? One adds an integer variable for each object, keeping track how many other objects referencing it, cf. [1]. Might be used in a runtime environment where one cannot risk hitting GC time, but is tricky to implement by hand, and one limitation is that circular reference are not removed. The programming language Swift has that builtin [2-3]. > do you mean std::shared_ptr? Yes, this class of C++11 and later provides it, so you might try it, cf. [4]. 1. https://en.wikipedia.org/wiki/Reference_counting 2. https://en.wikipedia.org/wiki/Swift_(programming_language) 3. https://developer.apple.com/library/ios/documentation/Swift/Conceptual/Swift_Programming_Language/AutomaticReferenceCounting.html 4. https://en.wikipedia.org/wiki/Smart_pointer#shared_ptr_and_weak_ptr _______________________________________________ help-bison@gnu.org https://lists.gnu.org/mailman/listinfo/help-bison
