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digitalmars.D.bugs - [Issue 4215] New: auto ref parameters don't work with class template variables

reply d-bugmail puremagic.com writes:
http://d.puremagic.com/issues/show_bug.cgi?id=4215

           Summary: auto ref parameters don't work with class template
                    variables
           Product: D
           Version: 2.038
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: P2
         Component: DMD
        AssignedTo: nobody puremagic.com
        ReportedBy: mrmocool gmx.de


--- Comment #0 from Trass3r <mrmocool gmx.de> 2010-05-20 15:35:34 PDT ---
Something like

class Foo(T)
{
    void bar(auto ref T item)
    {
    }
}

doesn't work.

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next sibling parent d-bugmail puremagic.com writes:
http://d.puremagic.com/issues/show_bug.cgi?id=4215


Walter Bright <bugzilla digitalmars.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |bugzilla digitalmars.com


--- Comment #1 from Walter Bright <bugzilla digitalmars.com> 2010-05-20
22:20:48 PDT ---
Exactly what does it do that is wrong?

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prev sibling next sibling parent d-bugmail puremagic.com writes:
http://d.puremagic.com/issues/show_bug.cgi?id=4215


Trass3r <mrmocool gmx.de> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Severity|normal                      |enhancement


--- Comment #2 from Trass3r <mrmocool gmx.de> 2010-05-21 05:12:20 PDT ---
class Foo(T)
{
    void bar(auto ref T item)
    {
    }
}

void main()
{
    Foo!(int) f;
}

gives

test.d(3): Error: auto can only be used for template function parameters

Hmm ok, maybe it rather is an enhancement.

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prev sibling next sibling parent d-bugmail puremagic.com writes:
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--- Comment #3 from Trass3r <mrmocool gmx.de> 2010-05-21 05:28:54 PDT ---
the more general code:

template bar(T)
{
    void bar(auto ref T item)
    {
    }
}

void main()
{
    bar!(int) f;
}

also doesn't work.


Even the following doesn't compile:
void bar(T)(auto ref T item)
{
}

void main()
{
    int i;
    bar!(int)(i); // while bar(i); is OK
}
test.d(1): Error: auto can only be used for template function parameters
test.d(8): Error: template instance test.bar!(int) error instantiating

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--- Comment #4 from Walter Bright <bugzilla digitalmars.com> 2010-05-21
09:49:12 PDT ---
What semantics do you wish auto to have for parameters? i.e. why are you using
it?

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