[Issue 4570] New: ElementType!(void[]) shows error message.

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=4570

           Summary: ElementType!(void[]) shows error message.
           Product: D
           Version: D2
          Platform: Other
        OS/Version: Windows
            Status: NEW
          Severity: normal
          Priority: P2
         Component: Phobos
        AssignedTo: nobody at puremagic.com
        ReportedBy: zan77137 at nifty.com


--- Comment #0 from SHOO <zan77137 at nifty.com> 2010-08-02 03:00:40 PDT ---
This code displays an error:

-------------- main.d ----------------------
import std.range;
pragma(msg, ElementType!(void[]));
------------------------------------
dmd -c main
void
std\array.d(357): Error: [i] has no effect in expression (a[0u])

I think that this error message should be removed.


If there is not an objection, I rewrite ElementType template as this:
------------------------------------
template ElementType(R)
{
    static if (is(typeof({return R.init.front();}()) T))
        alias T ElementType;
    else
        alias void ElementType;
}
------------------------------------

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