4 ms·

Also nice: a throw in Swift is like a return! It is setting the exception in a specific register and then returns. The ‘throws’ signature indicates to the calle

Also nice: a throw in Swift is like a return! It is setting the exception in a specific register and then returns. The ‘throws’ signature indicates to the caller two things: the user needs to use some exception handling, and the callsite needs to handle the special return register in case it is filled with an exception This way you do not need to do expensive stack walking

jayd16 2y ago
That's pretty neat. Does that mean it lacks a stack trace or is that preserved in some other way?
- rahkiin 2y ago
  They have a stack trace, and I assume they can build it much like a debugger
- saagarjha 2y ago
  There's no stack trace, yes.