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Book Overview & Buying
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Table Of Contents
Mastering Swift 6 - Seventh Edition
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In this chapter, we looked at Swift’s error-handling mechanisms. In Swift, we define errors using types that conform to the Error protocol, often represented by enumerations for clarity and conciseness. These error types encapsulate specific error conditions, aiding in code maintenance and comprehension.
We showed how to throw errors from functions using the throws keyword and catch them using the do-catch block. Error patterns are matched within catch clauses, allowing for precise error handling. Additionally, Swift provides a defer statement for executing cleanup code regardless of whether an error occurred.
This chapter also explored Swift’s availability and unavailability attributes, enabling conditional execution of code based on the platform’s version. Additionally, we looked at the LocalizedError protocol and typed throws.
In the next chapter, we will look at Swift’s built-in regular expression functionality.