Great, that worked. Thank you! (Using Perl 5.30, apparently) Now I'm getting the following error: 
Can't locate object method "edit" via package "IO::File" at 
searchandreplace.pl line 65 (#1)

(F) You called a method correctly, and it correctly indicated a packag
+e
functioning as a class, but that package doesn't define that particula
+r
method, nor does any of its base classes.  See perlobj.

[download]
Which pertains to the subroutine beginning with $target_file->edit( sub I am currently updating my CPAN modules (which is taking quite a long time) in hopes that will resolve the issue. EDIT: Updating CPAN modules did not resolve this issue. EDIT 2: After doing some more digging, it looks like the edit method comes from Path::Tiny, so I tried changing the start of the subroutine like so: 
sub search_and_replace {
  open my $target_file, "<", $_;
  my $filename = path($_);
  my $pos = 0;
  my $more = 1;
  while( $more )
  {
    $filename->edit( sub 
    {
      pos($_) = $pos;
      if( /$match/g )
        {
          my ( $was, $where, $pre, $post ) = ( $1, $-[1], $`, $');
          print "\n", $pre =~ s/^.*\n(?=.*\n)//sr, "$old$was$reset",
            $post =~ s/\n.*?\n\K.*//sr, "\n";
          my $replace = ask( $was );
          $was eq $replace or substr $_, $where, length $was, $replace
+;
          $pos = $where + length $replace;
        }
        else { $more = 0 }
      } );
      # print "\e[33m", $target_file->slurp, "\e[0m"; # FIXME here for
+ testing
    }
    close $target_file;
}

[download]
Which gets me a Use of uninitialized value $_ in scalar assignment at searchandreplace.pl line 54 (#1) error. Line 54 is pos($_) = $pos;.

In reply to Re^8: Immediately writing the results of search-and-replace by elemkeh
in thread Immediately writing the results of search-and-replace by Anonymous Monk

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