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POHow do you best attribute errors in a Perl method to the caller
 

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  1. POHow do you best attribute errors in a Perl method to the caller
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    <p>Given a method that may fail with warnings and/or errors, I want the error method to show up at the caller. Fir instance this script:</p> <pre><code>foo(0); # line 1 sub foo { 1 / shift; # line 4 } </code></pre> <p>Produces the error <code>Illegal division by zero at foo.pl line 4</code>, but I want <code>Illegal division by zero at foo.pl line 1</code>. There should be several ways if I put the method in a module or if I wrap the method body in eval, but I have not found an easy way like this: </p> <pre><code>sub foo { attributeErrorsToCaller; # do some magic 1 / shift; } </code></pre> <p>Is there such a way?</p> <hr> <p><strong>EDIT:</strong> <a href="https://stackoverflow.com/questions/6339816/how-do-you-best-attribute-errors-in-a-perl-method-to-the-caller/6340348#6340348">mirod's answer</a> comes close not what I was looking for:</p> <pre><code>Foo::foo(0); # line 1 package Foo; use diagnostics -traceonly; BEGIN { disable diagnostics; } sub foo { enable diagnostics; 1 / shift; # line 9 } </code></pre> <p>Without <code>enable diagnostics</code> the error message is <code>Illegal division by zero at foo.pl line 9.</code>. With <code>enable diagnostics</code> it is still too verbose, but this may also be useful:</p> <pre><code>Uncaught exception from user code: Illegal division by zero at foo.pl line 10. at foo.pl line 10 Foo::foo(0) called at foo.pl line 2 </code></pre> <p>I bet I could <a href="http://search.metacpan.org/#/showsrc/diagnostics" rel="nofollow noreferrer">hack diagnostics</a> to get exactely the feature I want, but using diagnostics as raw module is probably more recommended.</p>
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