why macro recursive stop condition not work?

I define some macro:

Is it acceptable to use C11 generic macros in Objective-C to box numbers?

I was getting tired of repeating types when writing things like this:

Is it acceptable to use C11 generic macros in Objective-C to box numbers?

I was getting tired of repeating types when writing things like this:

Is it acceptable to use C11 generic macros in Objective-C to box numbers?

I was getting tired of repeating types when writing things like this:

Macro guard in Objective-C

I have noticed that many famous libraries written in Objective-C (eg. AFNetworking) use the macro guard inside their header files.
Im aware that the #import directive, which works exactly like #include, includes each file only once, obviating the need for #include guards.
For what reason are still used?

Are macros values, data types, identifiers, variables, constants, or …? [closed]

Closed 9 years ago.

Are macros values, data types, identifiers, variables, constants, or …? [closed]

Closed 9 years ago.

Are macros values, data types, identifiers, variables, constants, or …? [closed]

Closed 9 years ago.

Are macros values, data types, identifiers, variables, constants, or …? [closed]

Closed 9 years ago.

Are macros values, data types, identifiers, variables, constants, or …? [closed]

Closed 9 years ago.