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.\" ========================================================================
.IX Title "Pastel::Exception 3"
.TH Pastel::Exception 3 "2003-04-29" "perl v5.8.0" "User Contributed Perl Documentation"
Pastel::Exception \- A module for easy exception handling in Pastel.
#For thowing exception from any module
# Creating an exception object has the advantage of calling
# the full stack trace. If the \fIcatch()\fR method in the Pastel::Exception
# class is not overridden, throwing an exception with a Exception object
# as parameter will call the full stack trace.
$self\->throw(Pastel::Exception(\*(L"Miserable condition\*(R"));
$self\->throw(\*(L"Miserable condition\*(R");
# If not caught it just calls croak \*(L"Miserable condition\*(R"
# If not caught it just calls croak \*(L"Unknown error\*(R";
# Catching an exception from a module
# You need to overide the \fIcatch()\fR of Exception class
$self\->throw(Pastel::Exception(\*(L"Some error\*(R");
my ($self, \f(CW$exception\fR) = \f(CW@_\fR;
\f(CW$exception\fR\->\fIprint_stack_trace()\fR; # Give full stack trace
print \f(CW$exception\fR\->\fIget_message()\fR; # prints \*(L"Some error\*(R"
croak \*(L"Miserable death\en\*(R";
Pastel::Exception is the root class of handling exception in Pastel. There are two ways exception can be handled. Either inheriting from Pastel::Exception andoverriding \fIcatch()\fR method, or by simply Creating a Pastel::Exception object and using its throw method. The exception is caught automatically by the \fIPastel::Exception::catch()\fR.
Malay <curiouser@ccmb.ap.nic.in>
.IX Subsection "new($string)"
\& Usage : Pastel::Exception->new("Some error");
\& or, Pastel::Exception->new();
\& Function : Creates and returns a Pastel::Exception object
\& Returns : Pastel::Exception object
\& Arguments: A string (optional);
\& Usage: $self->throw($e); # Inherited from Pastel::Exception class
\& or, $self->throw($string);
\& Function: Throws an exception.
\& Arguments: Either an Pastel::Exception object or a string or nothing
\& Usage : Should never be directly used. To use this function, override
\& this function after inheriting from Pastel::Exception.
\& Function : Catches an exception
\& Arguments: The function is always called with the same parameter when thrown.
\& May be a string or an Exception object or null. Should always be
\& tested with isa() before use.
.Sh "\fIprint_stack_trace()\fP"
.IX Subsection "print_stack_trace()"
\& Usage : $exception_object->print_stack_trace();
\& Function : Prints complete stack trace of the call.
.Sh "\fIget_message()\fP"
.IX Subsection "get_message()"
\& Usage : $exception_object->get_message()
\& Function : Return the message stored in the exception object.
\& Returns : A scalar containg the massage string.
projects / OpenSPARC-T2-DV / blob