Esteemed monks, with a trick available through Attribute::Handlers it's possible to have a subroutine print out some tracing info before it gets called (derived from this article): 
    use Attribute::Handlers;

    sub myattr :ATTR {
        my($func, $symbol, $code) = @_;

        no warnings 'redefine';

        *{$symbol} = sub { 
            print "Before\n";
            $code->();
        }
    }
    
    sub somefunc :myattr {
        print "somefunc!\n";
    }

    somefunc();

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This will print "Before" every time somefunc will be called. Now, what I'd like to do is create a Module, say MyAttrMaker that would accomplish the above like this: 
 
    use MyAttrMaker qw(myattr);
    sub somefunc :myattr {
        print "somefunc!\n";
    }
    somefunc();

[download]
For this to work, MyAttrMaker would have an import() function, which would use Attribute::Handlers and define sub myattr :ATTR {.

However, due to Attribute::Handler creating these hooks in the CHECK phase (other phases can be selected, too), this doesn't seem to be possible. Or is it?

In reply to Attribute::Handlers usage at runtime by saintmike

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