Oh thanks a lot for the links, very nice.

> perhaps it makes sense to add that to the list of things that matches depend on?

Point is that there are far more side effects than just pos and I wanted to keep it simple for a start.

Visualizing all side effects would be complicated. And testing challenging.

Resetting the string is already solving it.

There are various fuzzy ideas at play here

• automation of documentation
• testing of documentation
• case folding of conditions/deductions (more a math problem)
• drawing the "best" table
• drawing a table on demand for user requirements
• IDE support
• code intelligence
• regression testing of Perl versions
• testing of Perl ports (like to JS)

Bottom line: a meditation... ;)