Re: my $x->{foo} doesn't work

tetryl@tokyoprogrammer.com wrote:
> 
> I love my variable and am looking for various ways of using it.
> I will show you a bit of code.
> 
> $ perl -e 'my $x;$x->{foo}'     # OK
> $ perl -e '(my $x)->{foo}'      # NG
> 
> I expected that autovivification would be applied to the
> variable in the later case as well as in the first case, but
> the results were different.

If you look at what contexts permit and forbid autovivification, you'll
see that the situation in perl is currently complex and probably not
very consistent. Anyway, in general lvalue contexts don't permit it; a
lexical declaration can be seen as this; and you still can write, in a
rather obfuscated way,

    (my $x = {}) -> {foo}

Your patch looks correct at a first glance, but I'm not very inclined to
apply it, unless the crowd comes up with good reasons why to.

• my $x->{foo} doesn't work by tetryl
• Re: my $x->{foo} doesn't work by Rafael Garcia-Suarez
• ++(my $x = {}) [Was: Re: my $x->{foo} doesn't work] by Dan Kogai
• Re: ++(my $x = {}) [Was: Re: my $x->{foo} doesn't work] by Dan Kogai
• Re: ++(my $x = {}) [Was: Re: my $x->{foo} doesn't work] by Ronald J Kimball
• Re: ++(my $x = {}) [Was: Re: my $x->{foo} doesn't work] by Ronald J Kimball
• Re: ++(my $x = {}) [Was: Re: my $x->{foo} doesn't work] by Dan Kogai
• Re: my $x->{foo} doesn't work by Shinya Hayakawa
• Re: my $x->{foo} doesn't work by Elizabeth Mattijsen
• Re: my $x->{foo} doesn't work by Dave Mitchell
• Re: my $x->{foo} doesn't work by Rafael Garcia-Suarez
• Re: my $x->{foo} doesn't work by Dave Mitchell
• Re: my $x->{foo} doesn't work by Shinya Hayakawa
• Re: my $x->{foo} doesn't work by hv
• Re: my $x->{foo} doesn't work by Shinya Hayakawa
• Re: my $x->{foo} doesn't work by Dave Mitchell
• Re: my $x->{foo} doesn't work by Rafael Garcia-Suarez