writing iterators without code duplication. inout?
pompei2 at gmail.com
Wed Dec 21 08:30:29 PST 2011
> Just remove the non-const overload. const member functions work
> with mutable, immutable and const receivers.
Doing this, it compiles but it doesn't do what it should in two
1. I leave the code as-is. It compiles but "e" in the first
foreach loop in "main" is a copy, not a reference. This shows by
the second loop still displaying the original values, not the +1
2. To fix 1., I can change the "i" in the foreach loop in
"doTheIter" to "ref i", which will allow the first foreach loop
in "main" to successfully modify the array elements. But now, add
the line "e++;" into the second loop and it still compiles!
Change it to "ref e" (still in the second loop) and add a third
loop and it actually does modify the elements! It shouldn't be
allowed to, as "cc" is const and const is supposed to be
transitive. I'm not even using a cast.
So either this is not the solution, or I'm doing it wrong.
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