[Issue 6652] foreach parameter with number range is always ref

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=6652



--- Comment #3 from bearophile_hugs at eml.cc 2011-09-12 15:10:08 PDT ---
(In reply to comment #2)
> Making a const/immutable copy is not the right solution to this.

Keep in mind that foreach(i;0..10) must have *zero* abstraction penalty over a
for loop even with non-optimizing D compilers, because it's meant to replace
for loops everywhere possible. The more abstraction you put into foreach there
higher the probability it will not have zero abstraction penalty (currently it
has a bit of penalty for nested loops, sometimes).


> not possible using const:
> foreach(i; 1 .. 10)
>   while(i--) { do some }

Use a for loop :-)

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