package and do

esskar has asked for the wisdom of the Perl Monks concerning the following question:

my $foo = do { package Foo; local $/; <DATA>; };
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works, reads the __DATA__ section in Foo and writes it to $foo

my $class = 'Bar';
my $bar = do { eval "package $bar"; local $/; <DATA>; };
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does not work - probably because eval "package $bar" has its own scope.
Any ideas how i can solve my problem?

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Re: package and do by ikegami (Patriarch) on Feb 03, 2006 at 04:52 UTC
The following is even simpler: `my $pkg = 'Foo'; my $foo = do { local $/; eval "<${pkg}::DATA>" };` [download] The following is a version that doesn't use `eval EXPR` (faster, safer): `my $pkg = 'Foo'; my $data_fh = do { no strict 'refs'; {"${pkg}::DATA"} }; my $foo = do { local $/; <$data_fh> };` [download] And if you want to cut your memory usage in half, use the following: `my $pkg = 'Foo'; my $data_fh; { no strict 'refs'; $data_fh = {"${pkg}::DATA"}; } my $foo; { local $/; $foo = <$data_fh>; }` [download] You could even combine the two blocks.	[reply] [d/l] [select]
Re: package and do by reneeb (Chaplain) on Feb 03, 2006 at 00:59 UTC
`#!/usr/bin/perl use strict; use warnings; my $class = 'Foo'; my $foo = do{ eval "package $class; local \$/; <DATA>"}; print $foo; package Foo; __DATA__ Dies ist ein Test` [download]	[reply] [d/l]