/gist:4482025
Created Jan 8, 2013
Safe KVC macro by Andrew Pouliot. In the public domain.
| //o is an object type, k is the key on which to check validity | |
| //returns a NSString constant of the relevant key | |
| #define KVC(o, k) (0 && sizeof(o.k) ? @#k : @#k) | |
| //Usage: | |
| ObjectWithMethodCalledKeyName *object = ...; | |
| [object addObserver:self forKeyPath:KVC(object, keyName) options:0 context:NULL]; |
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