Perl Best Practices [Electronic resources] نسخه متنی

B.12. Chapter 13, Error Handling

• Throw exceptions instead of returning special values or setting flags. [Exceptions ]

• Make failed builtins throw exceptions too. [Builtin Failures ]

• Make failures fatal in all contexts. [Contextual Failure ]

• Be careful when testing for failure of the system builtin. [Systemic Failure ]

• Throw exceptions on all failures, including recoverable ones. [Recoverable Failure ]

• Have exceptions report from the caller's location, not from the place where they were thrown. [Reporting Failure ]

• Compose error messages in the recipient's dialect. [Error Messages ]

• Document every error message in the recipient's dialect. [Documenting Errors ]

• Use exception objects whenever failure data needs to be conveyed to a handler. [OO Exceptions ]

• Use exception objects when error messages may change. [Volatile Error Messages ]

• Use exception objects when two or more exceptions are related. [Exception Hierarchies ]

• Catch exception objects in most-derived-first order. [Processing Exceptions ]

• Build exception classes automatically. [Exception Classes ]

• Unpack the exception variable in extended exception handlers. [Unpacking Exceptions ]