On Mon, 12 Jan 2015 20:14:19 +0000 jmh530 via Digitalmars-d-learn <digitalmars-d-learn@puremagic.com> wrote:
> Thanks for the reply, I wasn't familiar with scoped. I was aware > that structs are on the stack and classes are on the heap in D, > but I didn't know it was possible to put a class on the stack. > Might be interesting to see how this is implemented. actually, there is nothing complicated there (if you don't want to write an universal thing like `emplace!` ;-). it builds a wrapper struct big enough to hold class instance, copies class `.init` there and calls class' constructor. the rest of the magic is done by the compiler: when struct goes out of scope, compiler calls struct destructor, which in turn calls class destructor. ah, and it forwards all other requests with `alias this` trick. > After looking up some more C++, I think what I was trying to do > is more like make_unique than unique_ptr. i don't remember C++ well, but nevertheless i encouraging you to take a look at `std.typecons`. there are some handy things there, like `Rebindable!` or `Nullable!`. and some funny things like `BlackHole!` and `WhiteHole!`. ;-) it even has `RefCounted!`, but it doesn't play well with classes yet (AFAIR).
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