Beefy Boxes and Bandwidth Generously Provided by pair Networks
Just another Perl shrine

comment on

( #3333=superdoc: print w/replies, xml ) Need Help??

I have another custom approach:

sub new { my ($thing) = @_ ; my $class = ( ref($thing) or $thing ) ; my $self = bless({}, $class) ; $self->{'errMsg'} = ""; # module user can set this e.g. to sub { carp($_[0]->{'errMsg'}) } + or something: $self->{'errHandler'}; return $self ; } # Sets an error message, calls the error Handler, always returns undef sub raiseError { my ($self, $string) = @_; $self->{'errMsg'} = $string; &{$self->{'errHandler'}}($self) if $self->{'errHandler'}; return; } # returns error message and resets it to "" sub error { my ($self) = @_; my $msg = $self->{'errMsg'}; $self->{'errMsg'} = ""; return $msg; } # ... sub foo { my ($self) = @_; # do stuff if ($trouble) { return raiseError("foo: cannot do thisandthat"); } # no error: # make sure to return true-evaluating or at least non-undef value return 1; }

This way the module user can still use idioms like

$O->foo() or die "could not blabla: ".$O->error();

Users can still set the error handler to croak() if they wish. This could be extended ad nauseam: $debug switches, $exec_handler switch, method to get errMsg without resetting it -- you name it. I should probably put it in its own module, too, and inherit from that. I'm still not sure how to escalate errors when one method calls another. Maybe simply

sub bar { my ($self) = @_; foo() or return raiseError("bar failed to rhubarb: ".$self->error( +)); return 1; } # ... $O->bar() or die "could not blabla: ".$O->error(); # "could not blabla: bar failed to rhubarb: foo: could not do thisandt +hat"

In reply to Re^3: Error Handling with Packages by anjoschu
in thread Error Handling with Packages by Dru

Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post; it's "PerlMonks-approved HTML":

  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.
  • Log In?

    What's my password?
    Create A New User
    and the web crawler heard nothing...

    How do I use this? | Other CB clients
    Other Users?
    Others avoiding work at the Monastery: (4)
    As of 2021-04-18 20:49 GMT
    Find Nodes?
      Voting Booth?

      No recent polls found