[LLVMdev] initialization list with conversion operator dont work properly and report error

[Eli Friedman]

I'm not really an overload resolution expert, so I could be wrong.  Anyway,
please file a bug report (http://llvm.org/bugs/), and our overload
resolution experts will take a look. :)

-Eli

On Wed, Sep 25, 2013 at 6:34 AM, Mayur Pandey <mayurthebond at gmail.com>wrote:

> Actually it should have not thrown error at all. it works fine with gcc.
> And the part of code which you mentioned is not getting hit at all. Maybe
> some difference in parsing is there.
>
>
> On Wed, Sep 25, 2013 at 5:29 AM, Eli Friedman <eli.friedman at gmail.com>wrote:
>
>> On Mon, Sep 23, 2013 at 11:43 PM, Mayur Pandey <mayurthebond at gmail.com>wrote:
>>
>>> for the following code:
>>>
>>> struct X
>>> {
>>>   X();
>>> };
>>>
>>> struct Y
>>> {
>>>   operator X() const;
>>> };
>>>
>>> X a = { Y() };    // reports error: no matching constructor for
>>> initialization of 'X'
>>> X aa = Y();  // works fine
>>>
>>>
>>> clang when compiled with std=c++11 gives compilation errors as:
>>>
>>>
>>> testfile.C:11:3: error: no matching constructor for initialization of 'X'
>>> X a = { Y() };    // reports error: no matching constructor for
>>> initialization of 'X'
>>>   ^   ~~~~~~~
>>> testfile.C:1:8: note: candidate constructor (the implicit copy
>>> constructor) not viable: no known conversion from 'Y' to 'const X &' for 1st
>>>       argument
>>> struct X
>>>        ^
>>> testfile.C:1:8: note: candidate constructor (the implicit move
>>> constructor) not viable: no known conversion from 'Y' to 'X &&' for 1st
>>>       argument
>>> struct X
>>>        ^
>>> testfile.C:3:3: note: candidate constructor not viable: requires 0
>>> arguments, but 1 was provided
>>>   X();
>>>   ^
>>> 1 error generated.
>>>
>>>
>> See C++11 [over.best.ics]p4.  We could probably improve the diagnostic
>> here, though; please file a bug.
>>
>> -Eli
>>
>
>
>
> --
> Thanx & Regards
> *Mayur Pandey *
> Senior Software Engineer
> Samsung India Software Operations
> Bangalore
> +91-9742959541
>
>
>
>
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