• d-bugmail puremagic.com (36/36) Sep 22 2010 http://d.puremagic.com/issues/show_bug.cgi?id=4916
• d-bugmail puremagic.com (10/10) Dec 01 2010 http://d.puremagic.com/issues/show_bug.cgi?id=4916
• d-bugmail puremagic.com (10/10) Jan 09 2011 http://d.puremagic.com/issues/show_bug.cgi?id=4916
• d-bugmail puremagic.com (16/16) Jan 09 2011 http://d.puremagic.com/issues/show_bug.cgi?id=4916
• d-bugmail puremagic.com (6/6) Feb 26 2013 http://d.puremagic.com/issues/show_bug.cgi?id=4916
• d-bugmail puremagic.com (11/11) Oct 24 2013 http://d.puremagic.com/issues/show_bug.cgi?id=4916
• d-bugmail puremagic.com (10/10) Oct 24 2013 http://d.puremagic.com/issues/show_bug.cgi?id=4916

d-bugmail puremagic.com writes:

http://d.puremagic.com/issues/show_bug.cgi?id=4916

           Summary: struct VariantN does not overload ()
           Product: D
           Version: D2
          Platform: x86
        OS/Version: Windows
            Status: NEW
          Severity: normal
          Priority: P2
         Component: Phobos
        AssignedTo: nobody puremagic.com
        ReportedBy: ah08010-d yahoo.com



PDT ---
This code:
==============
module scratch;

import std.variant;

unittest {
    Variant v;

    int foo() { return 1; }

    v = &foo;

    v();
}
================
Produces this error:
================
$ dmd -unittest -run bronze/util/scratch.d
bronze\util\scratch.d(12): Error: struct VariantN does not overload ()
===============

IMO, this is a design flaw: Variants claim to support function and delegate
pointers, and it seems obvious that supporting them should support invoking
them. (In particular, since functions and delegates are different sizes,
Variants should be very useful in this role, except ...)

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d-bugmail puremagic.com writes:

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Rob Jacques <sandford jhu.edu> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |sandford jhu.edu
         Depends on|                            |4053
           Severity|normal                      |enhancement


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d-bugmail puremagic.com writes:

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Andrei Alexandrescu <andrei metalanguage.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |ASSIGNED
                 CC|                            |andrei metalanguage.com
         AssignedTo|nobody puremagic.com        |andrei metalanguage.com


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d-bugmail puremagic.com writes:

http://d.puremagic.com/issues/show_bug.cgi?id=4916




Note that as listed in Bug 4053, struct constructors and opCall are not
compatible, so the v() syntax isn't possible. In the update to variant I've
been working on, I've added a .call method, which supports functions,
delegates, opCall, etc. Also, multi-argument opCall should be supported:

unittest {
    Variant v;
    int foo(int x, int y) { return x+y; }
    v = &foo;
    assert(v(4,6) == 10);
}

See https://jshare.johnshopkins.edu/rjacque2/public_html/variant.mht

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d-bugmail puremagic.com writes:

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PST ---
https://github.com/D-Programming-Language/phobos/pull/1152

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d-bugmail puremagic.com writes:

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Commits pushed to master at https://github.com/D-Programming-Language/phobos

https://github.com/D-Programming-Language/phobos/commit/27733b1cc4dd32f34a4b6b45c73959f2ccab501e
issue 4916

https://github.com/D-Programming-Language/phobos/commit/92c71f45f8e6216d5091bcd56e6fe38b49ec1eda


Fix Issue 4916: struct VariantN does not overload ()

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d-bugmail puremagic.com writes:

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Andrej Mitrovic <andrej.mitrovich gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |RESOLVED
                 CC|                            |andrej.mitrovich gmail.com
         Resolution|                            |FIXED


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