[Issue 16255] std.algorithm.iteration.each on opApply doesn't support ref
    via Digitalmars-d-bugs 
    digitalmars-d-bugs at puremagic.com
       
    Sun Oct  9 14:25:24 PDT 2016
    
    
  
https://issues.dlang.org/show_bug.cgi?id=16255
--- Comment #1 from Jon Degenhardt <jrdemail2000-dlang at yahoo.com> ---
An example that appears related:
void main()
{
    import std.algorithm : each;
    int[] dynamicArray = [1, 2, 3, 4, 5];
    int[5] staticArray = [1, 2, 3, 4, 5];
    dynamicArray.each!((ref x) => x++);
    assert(dynamicArray == [2, 3, 4, 5, 6]); // modified
    staticArray.each!((ref x) => x++);
    assert(staticArray == [1, 2, 3, 4, 5]);  // not modified
    staticArray[].each!((ref x) => x++);
    assert(staticArray == [2, 3, 4, 5, 6]);  // modified
}
Using a ref parameter works in the range cases, but not the static array case
(opApply).
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