From: Tobias Schwinger (tschwinger_at_[hidden])
Date: 2008-01-11 05:02:46
Steven Watanabe wrote:
> AMDG
>
> Tobias Schwinger <tschwinger <at> isonews2.com> writes:
>
>> Steven Watanabe wrote:
>>> AMDG
>>>
>>> Tobias Schwinger <tschwinger <at> isonews2.com> writes:
>>>
>>>>> I don't think the comma operator
>>>>> is a completely fool-proof way to detect void.
>>>> It is.
>>>>
>>>>> It could cause an
>>>>> ambiguity if the other type also defines an overloaded comma operator.
>>>> No, because the operator is binary and one operand can have a reserved
>>>> type which is only internally used by the test code.
>> I hope I haven't promised too much ...
>>
>>> Ok. Let's make this concrete. Here is what I imagine:
>> <code>
>>
>> Try the attached code - does it work for you?
>
> No it doesn't. None of the versions requiring implicit conversions
> worked. Did you by any chance compile with NDEBUG?
It works with GCC4. And another overload would be good:
friend char operator,(T const&, reserved const&);
Regards,
Tobias