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digitalmars.D.bugs - [Issue 6620] New: argument evaluation order inversed for extern(C)

reply d-bugmail puremagic.com writes:
http://d.puremagic.com/issues/show_bug.cgi?id=6620

           Summary: argument evaluation order inversed for extern(C)
           Product: D
           Version: D2
          Platform: Other
        OS/Version: FreeBSD
            Status: NEW
          Severity: normal
          Priority: P2
         Component: DMD
        AssignedTo: nobody puremagic.com
        ReportedBy: dawg dawgfoto.de


--- Comment #0 from dawg dawgfoto.de 2011-09-07 16:05:10 PDT ---
version (none)
{
    extern(C) int bar(int a, int b) { return b - a; }
}
else
{
    int bar(int a, int b) { return b - a; }
}

void main()
{
    int i;
    assert(bar(++i, ++i) == 1);
}

---

I know argument evaluation order isn't really guaranteed to be left to right.
But having a reverse order for extern(C) calls is simply surprising.

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parent d-bugmail puremagic.com writes:
http://d.puremagic.com/issues/show_bug.cgi?id=6620


yebblies <yebblies gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
                 CC|                            |yebblies gmail.com
         Resolution|                            |INVALID


--- Comment #1 from yebblies <yebblies gmail.com> 2011-09-08 14:30:51 EST ---
(In reply to comment #0)

 I know argument evaluation order isn't really guaranteed to be left to right.


It isn't guaranteed _at all_, it's undefined.  I think there's already an
enhancement open about defining the order of evaluation, but until that's
accepted this is perfectly valid behavior by the compiler.

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