Re: Hashkey stringification ... sometimes.

Don't rely on "automatic quoting" too much... It's only garanteed to work for barewords. _$_ most definitely is not a bareword (= the kind of word one normally uses for variable and sub names). The same goes for the left hand side of =>, I'm sure _$_ will do the same magic trick there as it did in your code...

my %hash = ( _$_ => 'foo' );
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this shows the following error when ran like this:

Can't call method "_" on an undefined value

The fact that it actually compiles, without any complaint, may be a bit unfortunate... But it's nothing out of the ordinary.

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Re: Re: Hashkey stringification ... sometimes. by dragonchild (Archbishop) on Mar 29, 2004 at 12:53 UTC
I just found an uglier case. `rob@dev01 $ perl -MO=Deparse -e '$x{_$}' Missing right curly or square bracket at -e line 1, at end of line syntax error at -e line 1, at EOF -e had compilation errors. rob@dev01 $ perl -MO=Deparse -e '$x{_$}}' $x{$}->_}; -e syntax OK` [download] Just interpose the _ and $ in $_. In almost 9 years, I've never run into that. I must have typed "{$_}" almost a million times and never mistyped it. shudders That's the kind of typo that brings grey hair to men in the teens! And, then you have `$x{y$}`, which is transliteration, `$x{s$}`, which tries to do substitution ... either it quotes or it doesn't! ------ We are the carpenters and bricklayers of the Information Age. Then there are Damian modules.... sigh* ... that's not about being less-lazy -- that's about being on some really good drugs -- you know, there is no spoon.* - flyingmoose	[reply] [d/l] [select]

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Re: Re: Hashkey stringification ... sometimes.
by dragonchild (Archbishop) on Mar 29, 2004 at 12:53 UTC

rob@dev01 $ perl -MO=Deparse -e '$x{_$}'
Missing right curly or square bracket at -e line 1, at end of line
syntax error at -e line 1, at EOF
-e had compilation errors.
rob@dev01 $ perl -MO=Deparse -e '$x{_$}}'
$x{$}->_};
-e syntax OK
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Just interpose the _ and $ in $_. In almost 9 years, I've never run into that. I must have typed "{$_}" almost a million times and never mistyped it. *shudders* That's the kind of typo that brings grey hair to men in the teens!

And, then you have $x{y$}, which is transliteration, $x{s$}, which tries to do substitution ... either it quotes or it doesn't!

------
We are the carpenters and bricklayers of the Information Age.

Then there are Damian modules.... *sigh* ... that's not about being less-lazy -- that's about being on some really good drugs -- you know, there is no spoon. - flyingmoose

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