[Issue 12770] New: Array operation result assignment to static arrays is complicated

[via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=12770

          Issue ID: 12770
           Summary: Array operation result assignment to static arrays is
                    complicated
           Product: D
           Version: D2
          Hardware: All
                OS: All
            Status: NEW
          Severity: enhancement
          Priority: P1
         Component: DMD
          Assignee: nobody at puremagic.com
          Reporter: turkeyman at gmail.com

I think this should work:

float[4] f(float[4] a)
{
    return (-a[])[0..$];
}

Error: cannot implicitly convert expression ((-a[])[0..__dollar]) of type
float[] to float[4]


What I was actually trying to do, is perform array operations on static arrays.
I'd like to think this should work:

float[4] f(float[4] a)
{
    return -a;
}

I tend not to think of static arrays like arrays, they're more like a discreet
object.
Requiring a[] causes a to become a dynamic array, and then it can't be assigned
back to a static array anymore. It all goes south for array operations on
static arrays with [].


At very least, this should probably work:

float[4] f(float[4] a)
{
    return -a[];
}

--