my $repl = "--$1";            ===  my $repl = '--'.$1;

my $repl = shift;             ===  my $repl = '--$1';

my $repl = eval shift;        ===  my $repl = --$1;
                              ===  Modification of a read-only value

my $repl = eval qq{"$temp"};  ===  my $repl = "--$1";
                              ===  my $repl = '--'.$1;

[download]

You should have checked if the eval succeeded.

And inside an a substitution: 

s/.../eval qq{"$temp"}/e

[download]

I hate hiding an eval EXPR as /ee. It's too dangerous to hide, and it prevents you from checking if the eval succeeded.

In reply to Re: eval problem by ikegami
in thread eval problem by 7stud

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