Description

Enforce conditions to return a class object on evaluate instead of judging on perlish boolean values.

Also removes the GreedyOr and CheckReturn condition as those violate the "boolean return" interface contract.

Type of change

Please delete options that are not relevant.

• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

Checklist:

• My code follows the style guidelines of this project, please see the contribution guidelines.
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• New and existing unit tests pass locally with my changes

You might think, that this is one crazy checklist, but it is just as much written for the maintainer of the involved software :-)