PSR-4 XA (require xautoload or registry_autoload)

Meta module to add as a dependency for Drupal 7 modules.

Indicates that your Drupal 7 module (the dependee) has classes in /src/ following the pattern known from Drupal 8.
It has an explicit dependency to xautoload, and then uses alternatives to also support registry_autoload.

Note that you still need an additional declaration for registry_autoload.

Require this if you have a bias towards xautoload, but you don't want to force your users to choose between the two.
If your personal bias is towards registry_autoload, require psr4ra instead :)

; Require xautoload, but allow registry_autoload as an alternative.
dependencies[] = psr4xa

; Tell registry_autoload that class files are in /src/ following PSR-4 with namespace mapping as in Drupal 8.
; This will simply be ignored if xautoload is used instead.
registry_autoload[] = PSR-4

Drupal 8

This module would be pointless in D8. So there will be no D8 version.