What does "propagate" mean in Swift?

Question

Created Dec ’17

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I was reading Apple's official swift language guide, in the Error Handling chapter, it says: "There are four ways to handle errors in Swift. You can propagate the error from a function to the code that calls that function, handle the error using a

do

-

catch

statement, handle the error as an optional value, or assert that the error will not occur."

What does the word "propagate" mean here?

Answer 1

KMT OP

Dec ’17

In that example, propagate means 'reproduce'. The dev can convert the error to an action (or non-action), using it as described, based on their individual requirements.