Re: BOOL attribute types.
Re: BOOL attribute types.
- Subject: Re: BOOL attribute types.
- From: Alex Zavatone <email@hidden>
- Date: Mon, 16 Feb 2015 16:20:34 -0500
Yeah. Thanks.
What I'm asking is how can I identify the property as a BOOL when analyzing property structures so that I can output "BOOL" to a descriptive string and if I analyze a char, I can output "char" as a descriptive string.
Obviously, I can't use property_getAttributes() since it returns the same values for BOOL and char.
What options are available here to detect that a property declared as a BOOL is a BOOL?
Thanks.
Sent from my iPad. Please pardon typos.
On Feb 16, 2015, at 4:13 PM, David Duncan <email@hidden> wrote:
>
>> On Feb 16, 2015, at 1:06 PM, Alex Zavatone <email@hidden> wrote:
>>
>> Xcode 5.1.1
>> IOS 7.x
>>
>> I'm messing with an auto description category for NSObjects with the interest of dumping out a class's properties in the format of property name, property class and string equivalent of property value.
>>
>> I'm also considering supporting scalar primitive types that are not NSObjects, such as CGRects, BOOLs and so on.
>>
>> In doing this, I'm checking the property's attributes with property_getAttributes().
>>
>> What is confusing here is that for properties that are declared as a non atomic BOOL, the attributes are Tc,N,V, where c codes for a char, according to the docs, according to the Runtime Property Attribute Description Examples.
>>
>> A char declared as a property returns exactly the same attributes as a BOOL with property_getAttributes().
>>
>> But for an NSString, property_getAttributes()returns "T@"NSString",&,N
>>
>> It's easy to detect the NSString properties, but why isn't BOOL included in a BOOL's property attributes? Is a BOOL just a char (that's what this is telling me)? What is going on under the hood here. How can I properly identify a BOOL and tell the difference between a BOOL and a char if they are represented the same way?
>
> On Mac OS X and 32-bit iOS targets, BOOL is a char, on 64-bit iOS targets its a C/C++ style ‘bool’.
>
>> Thanks much,
>> Alex Zavatone.
>>
>> Sent from my iPad. Please pardon typos.
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> --
> David Duncan
>
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