package dotdotdot;

use Filter::Simple;

FILTER_ONLY
  code => sub {
  s{ \s \Q...\E \s }{ () }gx;};
  s{ \s   !!!   \s }
     { die("Deferred implementation can't be executed"); }gx;
  s{ \s \Q???\E \s }
     { die("Deferred implementation can't be executed"); }gx
};

q[ foo bar baz ];