[Issue 13122] std.algorithm.cartesianProduct output type immutability

[via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=13122

bearophile_hugs at eml.cc changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |INVALID

--- Comment #5 from bearophile_hugs at eml.cc ---
(In reply to Peter Alexander from comment #4)

> The reason filtering a string yields dchar instead of immutable(dchar) is
> because string.front returns a decoded dchar by value. On the other hand
> iterating a dstring returns the dchar by ref, so you see its immutability.
> 
> Shall we close this bug?

The current behaviour is is a little strange, but I guess you are right. I
close this down then, as invalid.

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