---
name: "Perl::Critic::Policy::ValuesAndExpressions::RequireUpperCaseHeredocTerminator"
section: "3pm"
platform: "linux"
package: "perl-perl-critic"
version: "1.156-3"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/Perl::Critic::Policy::ValuesAndExpressions::RequireUpperCaseHeredocTerminator"
---

# Perl::Critic::Policy::ValuesAndExpressions::RequireUpperCaseHeredocTerminator(3pm)

Write " \<\<'THE\_END'; " instead of " \<\<'theEnd'; ".

## NAME

Perl::Critic::Policy::ValuesAndExpressions::RequireUpperCaseHeredocTerminator - Write " \<\<'THE\_END'; " instead of " \<\<'theEnd'; ".

## AFFILIATION

This Policy is part of the core Perl::Critic distribution.

## DESCRIPTION

For legibility, HEREDOC terminators should be all UPPER CASE letters (and numbers), without any whitespace.  Conway also recommends using a standard prefix like "END\_" but this policy doesn't enforce that.

```
  print <<'the End';  #not ok
  Hello World
  the End
  print <<'THE_END';  #ok
  Hello World
  THE_END
```

## CONFIGURATION

This Policy is not configurable except for the standard options.

## SEE ALSO

Perl::Critic::Policy::ValuesAndExpressions::RequireQuotedHeredocTerminator

## AUTHOR

Jeffrey Ryan Thalhammer \<jeff@imaginative-software.com\>

## COPYRIGHT

Copyright (c) 2005-2011 Imaginative Software Systems.  All rights reserved.

This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.  The full text of this license can be found in the LICENSE file included with this module.