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Editorial Team
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Asked: 2026-06-12T14:43:54+00:00

Let’s say I have a pointer to some object, called myObject , and I

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Let’s say I have a pointer to some object, called myObject, and I need to know, whether it is really pointing to something. How can this code:

// assume MyObjectClass *myObject;
return (BOOL)myObject;

return 112? I know, that I can always write

return (myObject == nil);

and everything will be fine. But until today I have always assumed, that explicit casting of anything to bool will always return true or false (as far as I know, 0 is always considered as false and any other value as true) and that BOOL with it’s YES and NO values is just “renamed” bool. So basically, my questions are:

  • Why is it returning 112? 🙂
  • Are results of explicit casting defined somewhere in C/Objective-C standard, or is it compiler-specific?
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1 Answer

  1. Editorial Team

    In Objective-C, the BOOL macro is just a typedef for signed char with YES/NO defined, but bool is an actual boolean, which can be true or false.

    It returns 112, because it rounds the address of your pointer to signed char type.

    Here is some discussion with good answers:
    Objective-C : BOOL vs bool
    Is there a difference between YES/NO,TRUE/FALSE and true/false in objective-c?

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