[SR-Users] $null + 0 is not int

[Daniel-Constantin Mierla]

In all programming languages the first operand gives the type of the
expression. That's why it works to concatenate integers to string in the
fashion:

"abc" + 123

Try 0 + $null and see if it is integer.

Cheers,
Daniel

On 01.12.19 12:29, Juha Heinanen wrote:
> I added 0 to $null in order to get int. If I had added "0" the result should be string. So this looks like a bug to me. If I add 0, result can't be string.
>
> Juha
>
>
> On December 1, 2019 6:08:01 PM GMT+09:00, Daniel-Constantin Mierla <miconda at gmail.com> wrote:
>> Probably is string, that's the default value type of PVs, as they
>> originated from xlog, where the output was a string to be printed.
>>
>> "" + 0 should be "0"
>>
>> Cheers,
>> Daniel
>>
>> On 01.12.19 02:35, Juha Heinanen wrote:
>>> Why is it that $null + 0 is 0 but not int?  What is it?
>>>
>>> -- Juha
>>>
>>>     $avp(test) = $null + 0;
>>>     if (is_int("$avp(test)"))
>>>         INFO(test $avp(test) IS int);
>>>     else
>>>         INFO(test $avp(test) IS NOT int);
>>>
>>> Dec  1 02:46:01 salmon /usr/bin/sip-proxy[10138]: INFO: test 0 IS NOT
>> int
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-- 
Daniel-Constantin Mierla -- www.asipto.com
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