This doesn't avoid eval, but it shouldn't break syntax highlighting, nor postpone compile issues to runtime: 
sub run_in_package (&$) {
    my($code, $package) = @_;
    eval "package $package; &$code; 1" or die $@;
}

foreach my $block ($self->get_blocks) {
    run_in_package {
        $block->setup->();
        $block->code->();
        $block->teardown->();
    } $block->package;
}

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In reply to Re: Dynamically Changing Packages w/out Eval by JavaFan
in thread Dynamically Changing Packages w/out Eval by Ovid

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