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Re: Stumped when passing barewords

by diotalevi (Canon)
on Apr 22, 2004 at 12:54 UTC ( #347333=note: print w/replies, xml ) Need Help??

in reply to Stumped when passing barewords

Doh. If I say it with Devel::Peek I note that the first call to sub2() was compiled when the (*) prototype wasn't known and @_ wasn't coerced into a scalar. The second was compiled when perl expected there to be only a scalar so instead of sub2(@_) you have sub2( scalar @_)

sub2 returns 1 because print() returns 1. This is 100% mundane. You might try saying print print '' to see what I mean.

use Devel::Peek; sub sub1(*) { print STDERR "args(1)\n"; Dump($_) for @_; sub2(@_); } sub sub2(*) { print STDERR "args(2)\n"; Dump($_) for @_; } sub sub3(*) { print STDERR "args(3)\n"; Dump($_) for @_; sub2(@_); } sub1 Bareword; sub3 Bareword; sub2(@{[Bareword]});

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Re: Re: Stumped when passing barewords
by EvdB (Deacon) on Apr 22, 2004 at 12:57 UTC
    In that case why does this have no effect?
    sub sub2(*) { print "args(2): @_\n"; 0; # <--- change is here. }
    The output is from the print statements, not the return values.
Re: Re: Stumped when passing barewords
by BrowserUk (Pope) on Apr 22, 2004 at 12:58 UTC

    sub2() returns 1, but how is it managing to print out it's own return value?

    Examine what is said, not who speaks.
    "Efficiency is intelligent laziness." -David Dunham
    "Think for yourself!" - Abigail

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