On 12.07.2011 22:05, Rick McGuire wrote:
> On Tue, Jul 12, 2011 at 3:56 PM, Rony G. Flatscher
> <rony.flatsc...@wu-wien.ac.at> wrote:
>   
>> While debugging a library, I stumbled about the following behaviour: after
>> replacing
>>
>> context->IsTypeOf(obj,"STRING")
>>
>> with
>>
>> context->IsString(obj)
>>
>> the resulting library would not behave the same. Undoing the change makes it
>> work again.
>>
>> Not being sure what the cause really is, I just would like to be sure that
>> invoking IsString(obj) with the same object as IsOfType(obj,"STRING") should
>> in both cases return identical results. Or is there some difference in howe
>> these two APIs carry out their functionality, such that it is possible that
>> they might return different results supplying the same object?
>>     
> IsString() will only return true if the object is exactly an instance
> of string.  IsOfType() will return for other objects that are not
> necessarily strings, such as subclasses or even the hidden Integer and
> NumberString instances.
>   
Ahh, that explains this, thank you very much!

(The error occurs when the object is an integer, so the test in this
case will yield different results. Will use IsOfType() instead of
IsString() in these un/marshalling cases.)

---rony


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