in reply to cross scope gotos?

So what exactly is a "dynamic scope" here?

Basically anywhere in the current program that hasn't been optimised away: 

perl -e"sub x{ goto $_[0] } bill: x( 'bill' ) "

perl -e"sub x{ goto $_[0] } bill: x( 'john' ); john: goto bill;"

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In the absence of evidence, opinion is indistinguishable from prejudice.
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Re^2: cross scope gotos?
by LanX (Saint) on Apr 06, 2010 at 15:19 UTC
    > Basically anywhere in the current program that hasn't been optimised away:

    not that easy!

    perl -e'
goto INTO;
print "Start";
for $i (0..9) {
  INTO: print "STOP";
};'
Can't "goto" into the middle of a foreach loop at -e line 4.

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    You can't jump to a label out of the current or previous frames!

    see Re^3: cross scope gotos? and goto

    Cheers Rolf

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      You can't jump to a label out of the current or previous frames!

      I think that's (currently) an over statement: 

      perl -le"goto loop; $x=0; if( $x ){  while(1){ loop: print 'hi' } }"

      [download]
      Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
      "Science is about questioning the status quo. Questioning authority".
      In the absence of evidence, opinion is indistinguishable from prejudice.
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[d/l]
        > I think that's (currently) an over statement:

        nope, while has a proper block but not a proper "frame" like foreach or subs.

        (I read somewhere that foreach has internally a frame, but no time to search now...)

        But the confusion is understandable, that's why I started the thread.

        Cheers Rolf

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