Re^2: Sub ref from string without eval


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Re^2: Sub ref from string without eval

by moritz (Cardinal)

on Apr 02, 2012 at 15:01 UTC ( [id://963032]=note: print w/replies, xml )

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in reply to Re: Sub ref from string without eval
in thread Sub ref from string without eval

\&{$x} works perfectly fine with strict refs. It is only implicit usage of strings as references that is prohibted by strict refs. If you go to the length of writing \&{ ... }, perl assumes a symbolic reference is indeed what you want.

use strict;
use warnings;
use 5.010;

sub Foo { 'in sub Foo' }

my $x = 'Foo';

my $sub_ref = \&{$x};
say $sub_ref->();
__END__
in sub Foo
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Re^3: Sub ref from string without eval by ikegami (Patriarch) on Apr 02, 2012 at 19:09 UTC
It is only implicit usage of strings as references that is prohibted by strict refs. Nope. `$ perl -e'use strict; my $x = "foo"; \${ $x }' Can't use string ("foo") as a SCALAR ref while "strict refs" in use at + -e line 1. $ perl -e'use strict; \${ "foo" }' Can't use string ("foo") as a SCALAR ref while "strict refs" in use at + -e line 1.` [download] `\&{ ... }` is clearly an exception.	[reply] [d/l] [select]

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