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Code that is never executed is known as dead code. Typically, the presence of dead code indicates that a logic error has occurred as a result of changes to a program or the program's environment. To improve readability and ensure that logic errors are resolved, dead code should be identified, understood, and eliminated.

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sub fix_name {
  my $name = shift;

  if ($name eq "") {
    return $name;
  }
  $name =~ s/^([a-z])/\U$1\E/g;
  $name =~ s/ ([a-z])/ \U$1\E/g;
  if (length( $name) == 0) {
    die "Invalid name";  # cannot happen
  }
  return $name;
}

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sub fix_name {
  my $name = shift;

  $name =~ s/^([a-z])/\U$1\E/g;
  $name =~ s/ ([a-z])/ \U$1\E/g;
  if (length( $name) == 0) {
    die "Invalid name";  # cannot happen
  }
  return $name;
}

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The presence dead code may indicate logic errors that can lead to unintended program behavior. As a result, resolving dead code can be an in-depth process requiring significant analysis.

Automated Detection

Related Guidelines

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Bibliography

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EXP30-PL. Do not use deprecated or obsolete functions      02. Expressions      Image Added Image Added Image Modified