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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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Node Type: perlquestion [id://1013574]
Approved by marto
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[Tux]: None work for me. My dead key is AltGr (right Alt)
[Tux]: And I just tested, neither do other Tk apps :) (95% of my Tk Apps is either just monitoring (no input) or input of just numbers). Something to investigate then
[choroba]: Maybe something like this?
[choroba]: I vaguely remember we had problems with dead keys in Tk at $work - 2, but I forgot all the details
[choroba]: but it was worse on MSWin than on Linux
[choroba]: (and OSX didn't exist yet)

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