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Carp (3)
  • >> Carp (3) ( Solaris man: Библиотечные вызовы )
  • Carp (3) ( Разные man: Библиотечные вызовы )


         carp    - warn of errors (from perspective of caller)
         cluck   - warn of errors with stack backtrace
                   (not exported by default)
         croak   - die of errors (from perspective of caller)
         confess - die of errors with stack backtrace


             use Carp;
             croak "We're outta here!";
             use Carp qw(cluck);
             cluck "This is how we got here!";


         The Carp routines are useful in your own modules because
         they act like die() or warn(), but report where the error
         was in the code they were called from.  Thus if you have a
         routine Foo() that has a carp() in it, then the carp() will
         report the error as occurring where Foo() was called, not
         where carp() was called.
         Forcing a Stack Trace
         As a debugging aid, you can force Carp to treat a croak as a
         confess and a carp as a cluck across all modules. In other
         words, force a detailed stack trace to be given.  This can
         be very helpful when trying to understand why, or from
         where, a warning or error is being generated.
         This feature is enabled by 'importing' the non-existent
         symbol 'verbose'. You would typically enable it by saying
             perl -MCarp=verbose
         or by including the string `MCarp=verbose' in the the
         PERL5OPT manpage environment variable.


         The Carp routines don't handle exception objects currently.
         If called with a first argument that is a reference, they
         simply call die() or warn(), as appropriate.

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