Jenda,
You CANNOT do what you are suggesting.
$ perldoc -f do
do BLOCK
Not really a function. Returns the value of the last command
in the sequence of commands indicated by BLOCK. When modified
by a loop modifier, executes the BLOCK once before testing the
loop condition. (On other statements the loop modifiers test
the conditional first.)
"do BLOCK" does not count as a loop, so the loop control
statements "next", "last", or "redo" cannot be used to leave
or restart the block. See the perlsyn manpage for alternative
strategies.
My script failed because I was using 'last' inside a do-while construct.
This is why I posted this. It is a statement NOT a loop structure.
Jeff
--- Jenda Krynicky <[EMAIL PROTECTED]> wrote:
> From: Jeff Westman <[EMAIL PROTECTED]>
>
> > In other languages, such as C, there is little difference between a
> > while() loop and a do-while() loop. The only difference of course
> > being that that do-while() loop will always execute at least once
> > (test after), while the while-loop does a test before....
> >
> > Much to my amazement, do() in perl is a STATEMENT BLOCK and not a
> > loop! Yet the while() construct is a loop.
>
> do{} by itself is not a loop, but with while() it can be:
>
> do {print '.';print ':';} while ($x++ < 10);
> .:.:.:.:.:.:.:.:.:.:.:
> do {print '.';print ':';} while ($x++ < -10);
> .:
> do {print '.';print ':';last} while ($x++ < 10);
> .:
> do {print '.';last;print ':';} while ($x++ < 10);
> .
>
> So I guess the do{} in Perl is just an extension to the "do-while()"
> in other languages. It started as the first part of the do-while()
> construct and then started a life of its own :-)
>
> Jenda
> ===== [EMAIL PROTECTED] === http://Jenda.Krynicky.cz =====
> When it comes to wine, women and song, wizards are allowed
> to get drunk and croon as much as they like.
> -- Terry Pratchett in Sourcery
>
>
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