shouldn't const cast always be allowed (even if shunned)

Jonathan M Davis jmdavisProg at gmx.com
Thu Nov 15 16:46:39 PST 2012


On Thursday, November 15, 2012 15:23:40 Dan wrote:
> There are times when casting away const is needed. Structs that
> define opCast can get in the way of this. For instance, the cast
> below fails, but I think it should always be allowed. So, if the
> source type and cast type are the same except for const
> qualifiers,
> there is no need to consider custom opCast members. Is a
> reasonable
> suggestion for the language?
> 
> The cast here fails because it is considering custom opCast
> methods,
> but that is not helpful.
> 
> Thanks
> Dan
> 
> ---------------------
> import std.bitmanip;
> void main() {
> const(BitArray) cba;
> cast()cba;
> }

http://d.puremagic.com/issues/show_bug.cgi?id=5747

- Jonathan M Davis


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