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POHow can I pass parameters to Perl subroutines defined using eval?
 

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    <p>I'm using a config file (in YAML) to define types that are used later on to validate other config values required for my app:</p> <pre><code>--- action: &gt; use List::MoreUtils; my $value = $_; any { $value eq $_ } qw(fatal keep merge non-fatal replace); dir : return defined $_ ? -d $_ : -1; file : return defined $_ ? -f $_ : -1; string: 1; --- config-element: value: foo type : file etc ... </code></pre> <p>The idea is to <code>eval</code> each type definition, throw them into a hash and then call to validate configuration data (the following is schematic for easy comprehensibility):</p> <pre><code>#throw sub refs into hash my %type_sub; foreach my $key (keys %$type_def_ref) { my $sub_str = "sub {$type_def_ref-&gt;{$key}}"; $type_sub{$key} = eval $sub_str; } #validate (myfile is a real file in the cwd) print $type_sub{file}-&gt;('myfile'),"\n"; print $type_sub{action}-&gt;('fatal'), "\n"; </code></pre> <p>The problem is that the subroutines in %type_sub don't seem to accept parameters. In the above case, the first print statement outputs <code>-1</code> while the second outputs: </p> <pre><code>Use of uninitialized value $value in string eq at (eval 15) line 1. Use of uninitialized value $_ in string eq at (eval 15) line 1. Can't call method "any" without a package or object reference at (eval 15) line 1. </code></pre> <p>which is not at all what I expect, yet the subroutines are being called.</p> <p>What am I doing wrong? </p> <p>EDIT: I was being sloppy and everything works fine now. Thanks to Friedo.</p>
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