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/TheAbyss.h

Created August 30, 2017 14:17
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TheAbyss.h
// TheAbyss.h
+ (NSString *)greetingMessageFromTheOtherworld;
// TheAbyss.m
+ (NSString *)greetingMessageFromTheOtherworld {
return nil;
}
// LonesomeWanderer.swift TheAbyss.greetingMessageFromTheOtherworld().isEmpty
// compiles fine, but crashes at runtime with a lovely message:
// "fatal error: unexpectedly found nil while unwrapping an Optional value"
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