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How does 'goto LABEL' search for its label?

by moritz (Cardinal)
on Jan 16, 2013 at 13:50 UTC ( #1013574=perlquestion: print w/replies, xml ) Need Help??

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  1. or download this
    $ perl -wE 'if (0) { label: say 1 }; goto label'
    Can't find label label at -e line 1.
    ...
    Use of "goto" to jump into a construct is deprecated at -e line 1.
    1
    ^C # aborted, because it loops
    
  2. or download this
    
    #!/usr/bin/perl
    ...
    __END__
    here
    here
    
  3. or download this
    $ perl -wE 'sub g() { label: say "here" }; g; goto label'
    here
    Can't find label label at -e line 1.
    

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