On Monday, 11 February 2013 at 15:06:26 UTC, Steven Schveighoffer
wrote:
On Mon, 11 Feb 2013 09:46:54 -0500, Dicebot
<m.stras...@gmail.com> wrote:
This question is so stupid I am just struck with trying to
chose the "good" solution.
Consider this code:
string func(in string[] args)
{
return args.join(" "); // compile error, args is not an
input range
}
It is somewhat expected as you can hardly popFront on a const
range. But then question is: how can I wrap const slice into a
mutable range without copying data (using standard
language/library solution)? Of course, I can do .dup.join, but
there is no real need to do copy, even a shallow one.
What you are looking for is a tail-const array:
string func(const(string)[] args)
This will allow traversal, and not allow modification of the
elements.
-Steve
No, I do not look for tail const. I don't want to allow
head-mutability for parameter, but I want to make a mutable
slice-range for it later. That does not break any const
guarantees and should be safely possible.
