On Monday, 30 December 2013 at 16:10:35 UTC, Andrei Alexandrescu
wrote:
On 12/30/13 3:34 AM, Ritu wrote:
But then the source object may not be mutable. I am not a
compiler
expert, but could a special case be made in D compiler for
the cases
where the source struct instance is mutable and is made
available to
ease such lazy initialization?
I am suggesting a DIP here.
Did you take a look at http://wiki.dlang.org/DIP49 and
http://wiki.dlang.org/DIP53?
Andrei
I have done that now. These DIPs though related, do not make the
original object available for modification. But since DIP49
allows qualification of postblit, I believe what I am asking for
becomes very much possible as an extension. We just need to
provide another overloaded "mutable" postblit that would provide
access to the "original" as well as "copied" struct instances.
I believe this will go a long way in fixing the behavior of some
containers like the appender too. In general it will make "lazy
initialization" much more usable in D.
Regards
- Ritu
