Hello.

I am a little confused, looking at the following code I cant see how
the standard disambiguates it:

void f(bool);
void f(char*);

void t()
{
    f(nullptr);
}

Now, 4.1 do not apply (nullptr is already an rvalue)
4.10 and 4.12 do apply so both f are viable candidates.
13.3.3.3.2    4 do not apply as that is only relevant for pointers.

So by my reading this is ambiguos, is that intended?

[note to moderator: google's web interface sent a draft version of
this, could you please stop it]


--
[ comp.std.c++ is moderated.  To submit articles, try just posting with ]
[ your news-reader.  If that fails, use mailto:std-c++@netlab.cs.rpi.edu]
[              --- Please see the FAQ before posting. ---               ]
[ FAQ: http://www.comeaucomputing.com/csc/faq.html                      ]

On 14 Feb., 16:55, Magnus F <ma...@lysator.liu.se> wrote:
> I am a little confused, looking at the following code I cant see how
> the standard disambiguates it:
>
> void f(bool);
> void f(char*);
>
> void t()
> {
>     f(nullptr);
>
> }
>
> Now, 4.1 do not apply (nullptr is already an rvalue)
> 4.10 and 4.12 do apply so both f are viable candidates.
> 13.3.3.3.2    4 do not apply as that is only relevant for pointers.
>
> So by my reading this is ambiguos, is that intended?

See core issue

http://www.open-std.org/jtc1/sc22/wg21/docs/cwg_active.html#961

which should solve this problem.

HTH & Greetings from Bremen,

- Daniel


--
[ comp.std.c++ is moderated.  To submit articles, try just posting with ]
[ your news-reader.  If that fails, use mailto:std-c++@netlab.cs.rpi.edu]
[              --- Please see the FAQ before posting. ---               ]
[ FAQ: http://www.comeaucomputing.com/csc/faq.html                      ]

Magnus F wrote:

> Hello.
>
> I am a little confused, looking at the following code I cant see how
> the standard disambiguates it:
>
> void f(bool);
> void f(char*);
>
> void t()
> {
>     f(nullptr);
> }
>
> Now, 4.1 do not apply (nullptr is already an rvalue)
> 4.10 and 4.12 do apply so both f are viable candidates.
> 13.3.3.3.2   4 do not apply as that is only relevant for pointers.
>

Work is under way to change 13.3.3.3.2   4 . See
http://www.open-std.org/jtc1/sc22/wg21/docs/cwg_active.html#961

--
[ comp.std.c++ is moderated.  To submit articles, try just posting with ]
[ your news-reader.  If that fails, use mailto:std-c++@netlab.cs.rpi.edu]
[              --- Please see the FAQ before posting. ---               ]
[ FAQ: http://www.comeaucomputing.com/csc/faq.html                      ]