Question

Code:

NSInvocation *invocation = [NSInvocation invocationWithMethodSignature:signature];
BOOL initial = YES;
[invocation setArgument:&initial atIndex:2];

Question:

Would it be possible to pass YES to setArgument:atIndex: without creating the temporary variable?

I was thinking that maybe there’s a language construct I’m not aware of and/or constant in the runtime that is always YES that I can point to.

Thanks!

Answer 1

No, not in any clean, reliable way.

NSInvocation will dereference whatever pointer you send it and copy data of length specified by the method signature out of it. You need to have that information somewhere so you can get an address to it, and having the local variable as you have is the best way to do so.