Re^2: "next" in Parallel::ForkManager, and subroutines

Hmm. The docs for next include:

"next" cannot be used to exit a block which returns a value
such as "eval {}", "sub {}" or "do {}", and should not be used
to exit a grep() or map() operation.
[download]

Doesn't sound supported to me.

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Re^3: "next" in Parallel::ForkManager, and subroutines by tobyink (Canon) on Apr 23, 2012 at 10:07 UTC
I think this is referring to the fact that you can't use `next` to "just" jump out of a `sub` (or `do` or `eval`) - it needs to jump out of another block (which does not return a value) at a higher level. Compare this: `sub foo () { next } foo` [download] with this: `sub foo () { next } foo for 1` [download] The first dies with Can't "next" outside a loop block; the second runs successfully, but will warn when warnings are enabled. `perl -E'sub Monkey::do{say$_,for@_,do{($monkey=[caller(0)]->[3])=~s{::}{ }and$monkey}}"Monkey say"->Monkey::do'`	[reply] [d/l] [select]

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Re^3: "next" in Parallel::ForkManager, and subroutines
by tobyink (Canon) on Apr 23, 2012 at 10:07 UTC

I think this is referring to the fact that you can't use next to "just" jump out of a sub (or do or eval) - it needs to jump out of another block (which does not return a value) at a higher level. Compare this:

sub foo () { next }
foo
[download]

with this:

sub foo () { next }
foo for 1
[download]

The first dies with Can't "next" outside a loop block; the second runs successfully, but will warn when warnings are enabled.

perl -E'sub Monkey::do{say$_,for@_,do{($monkey=[caller(0)]->[3])=~s{::}{ }and$monkey}}"Monkey say"->Monkey::do'

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