When const ranges are passed by value to a function, they can safely receive an implicit shallow Unqual. In many cases this makes them ranges of const elements that is useful.

On 8/12/2010 1:05 AM, Shin Fujishiro wrote:
David Simcha<[email protected]>  wrote:
I'm looking to go on a major debugging spree and make std.range work
with const ranges.  For example, the following should work:

import std.range, std.algorithm;

void main() {
      const foo = map!"a ^^ 2"([1,2,3,4,5]);
      auto myRetro = retro(foo);
}
Could you elaborate why?

Ranges with const elements must be common; but what's the point of
const ranges?  Const random access ranges are usable, but other const
ranges seem to be useless since popFront and popBack can't be const.


Shin
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