[Issue 10307] New: Bad error message for not supported array operation

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=10307

           Summary: Bad error message for not supported array operation
           Product: D
           Version: D2
          Platform: x86
        OS/Version: Windows
            Status: NEW
          Keywords: diagnostic
          Severity: minor
          Priority: P2
         Component: DMD
        AssignedTo: nobody at puremagic.com
        ReportedBy: bearophile_hugs at eml.cc


--- Comment #0 from bearophile_hugs at eml.cc 2013-06-08 15:03:11 PDT ---
Currently this array operation is not a supported because there is no explicit
allocation of the modified array:


import std.math;
double sum(double[] data) {
    double result = 0.0;
    foreach (d; data)
        result += d;
    return result;
}
void main() {
    double[2] a = [2.0, 3.0];
    assert(sum(a[] ^^ 2) == 13.0);
}


dmd 2.064alpha gives this error message:

test.d(10): Error: Array operation a[] ^^ 2L not implemented


I suggest to improve the error message.

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