On Tue, Nov 2, 2010 at 8:08 PM, Steve Schveighoffer <[email protected]>wrote:
> All of these have nothing to do with sealed ranges. They have to do with > data > lifetime. If you destroy data and then try to access it, you will have > problems > with or without sealed ranges. In addition, only one instance you show has > a > sealed range in it. The rest either don't have ranges or are not sealed. > > Having a sealed range does not necessarily mean that the user cannot shoot > themselves in the foot and delete the data while still maintaining > references to > it. This problem is mostly solved by having the data or at least the > pointer to > the data on the heap, destroyed by the GC when no longer needed. > > Even then, this does not rule out the user calling clear on the pointer. > > SealedRange is not a magic bullet for memory issues, and all these issues > exist > with or without sealed ranges or expensive copy construction. > > What SealedRange *does* do is allow the container to have complete control > over > the storage for the data. This means it can: > > a) intercept all accesses to the memory, including writes and reads. > b) use abstracted allocation schemes. > > -Steve > > > > ----- Original Message ---- > > From: SHOO <[email protected]> > > Another viewpoint. > > > > Is SealedRange really appropriate? > > > > All these are caused by the same problem: > > - http://ideone.com/x1Zus > > - http://ideone.com/iM18Q > > - http://ideone.com/TTin3 > > - http://ideone.com/x4b0o > > > > We should consider that we grope the common solution for these problems. > > It is the method that block the access to reference data of which > > instance was deleted. > > _______________________________________________ > > phobos mailing list > > [email protected] > > http://lists.puremagic.com/mailman/listinfo/phobos > > > > > > _______________________________________________ > phobos mailing list > [email protected] > http://lists.puremagic.com/mailman/listinfo/phobos >
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