use strict;
use warnings;

use Benchmark q{cmpthese};

my @prims = qw{ int char long double static };

my $inFile = q{xxx.c};
open my $inFH, q{<}, $inFile
   or die qq{open: $inFile: $!\n};
my $outFile = q{/dev/null};
open my $outFH, q{>}, $outFile
   or die qq{open: $outFile: $!\n};

cmpthese(
   -10,
   {
       JohnGG    => sub
          {
              seek $inFH, 0, 0;
              my $rxPrims = do
                 {
                     local $" = q{|};
                     qr{\b(@prims)\b};
                 };
              while ( <$inFH> )
              {
                  next unless my @found = m{$rxPrims}g;
                  print $outFH qq{Found @found on line $.\n};
              }
          },
       Narveson  => sub
          {
              seek $inFH, 0, 0;
              while ( <$inFH> ) {
                  for my $word ( m{\b(\w+)\b}g ) {
                      if (grep {$word eq $_} @prims) {
                          print $outFH qq{Found $word on line $.\n};
                      }
                  }
              }
          },
       Narveson2 => sub
          {
              seek $inFH, 0, 0;
              my %sought = map { $_ => 1 } @prims;
              while ( <$inFH> ) {
                  for my $word ( m{\b(\w+)\b}g ) {
                      if ( $sought{$word} ) {
                          print $outFH qq{Found $word on line $.\n};
                      }
                  }
              }
          },
   }
   );

close $inFH
   or die qq{close: $inFile: $!\n};
close $outFH
   or die qq{close: $outFile: $!\n};
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