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Mastering Modern Perl: Writing Efficient and Maintainable Code

Exception Caveats and Built-in Exceptions

Explore the complexities of exception handling in Perl by understanding the risks when using $@, how Modern Perl and Try::Tiny improve safety, and how to catch built-in exceptions. This lesson helps you write more reliable and maintainable Perl code by mastering these error management techniques.

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Exception caveats

Though throwing exceptions is simple, catching them is less so. Using $@ correctly requires us to navigate several subtle risks:

  • Unlocalized uses in the same or a nested dynamic scope may modify $@.
  • $@ may contain an object that returns a false value in boolean context.
  • A signal handler (especially the die signal handler) may change
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