Question

I’m trying to create an Objective-C string using the ‘#’ and ‘##’ operators. I’ve written the following macros:

#define OBJCKEY(p, s) p ## s
#define KEY(k) OBJCKEY(@, #k)

Which I’m trying to use in a function in the following way:

NSString *key = KEY(EnumValue1);

But Xcode reports the following error:

Pasting formed '@"EnumValue1"', an invalid preprocessing token

Any idea on how to fix this?

Note: I’m using the LLVM compiler.

Answer 1

Any idea on how to fix this?

Is there anything wrong with

NSString* key = @"EnumValue1";

Or how about

#define KEY(k) (@#k)

NSString* key = KEY(EnumValue1);