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Re: How does 'goto LABEL' search for its label?

by Anonymous Monk
on Jan 16, 2013 at 15:32 UTC ( #1013589=note: print w/ replies, xml ) Need Help??


in reply to How does 'goto LABEL' search for its label?

goto says (among other things)

Use of "goto-LABEL" or "goto-EXPR" to jump into a construct is deprecated and will issue a warning. Even then, it may not be used to go into any construct that requires initialization, such as a subroutine or a "foreach" loop. It also can't be used to go into a construct that is optimized away.

So LABELs are like lexicals, except with only file-scope or subroutine-scope ( Lexical scoping like a fox )

lexical(my) variables from one loop/block is not visible in another, but labels are , because they currently have file scope (like my $foo at the top of a file outside of any bare blocks)

currently { L: say 1; } is like my $L; { $L=1; say $L; }

But this will change, once  Use of "goto" to jump into a construct is deprecated   is disallowed, labels will be lexically scoped like my $vars

someday { L: say 1; } is like { my $L=1; say $L; }


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Re^2: How does 'goto LABEL' search for its label?
by Anonymous Monk on Jan 16, 2013 at 17:28 UTC

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