Swift has `guard else`, including `guard let else` for preconditions, where you only put the error responding code and where the compiler forces you to exit the

Swift has `guard else`, including `guard let else` for preconditions, where you only put the error responding code and where the compiler forces you to exit the current context (e.g. return a value, throw an error, etc). It is nice for collapsing pyramids of doom that come from normal precondition checking. You can put multiple comparisons or variable assignments into a a single guard as well, separated by commas. It does not support binding to the error in a Result though, so for these you usually still get more readable code handling these with try/catch, with the corresponding nested code block.