On 11 October 2015 at 17:10, Andrei Alexandrescu via Digitalmars-d <digitalmars-d@puremagic.com> wrote: > On 10/11/15 9:48 AM, Manu via Digitalmars-d wrote: >> >> C++ basically implemented rval-references to >> improve (not solve) the RC problem... > > > Interesting, haven't heard of this viewpoint. Could you please give detail > on that? -- Andrei
Yeah, that is a terrible claim, but that do offer some advantage (in this situation as with others). The language doesn't support ref counting; constructors/destructors are a pretty crude mechanism to implement them, since they don't model the ref-counting pattern but a superset, which technically allows it to work, but it's pretty lame and inefficient to do ref-counting this way, and it's impossible for code (or the compiler) to distinguish between actual ref-counting events and must behave conservatively. rvalue-references allow the language to elide some unnecessary assignment logic, which can be further used to perform some inc/dec elision, but it starts to get extremely complex at this point, and it still doesn't do the trick. It's a sort of band-aid, but certainly not just for RC.
