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This module was considered for merging on 2019 December 30. The result of the discussion was "no consensus".
Latest comment: 6 months ago1 comment1 person in discussion
If there is an error category for unknown parameters then it's only added in the rendered page, not previews which instead show a preview warning. That can be very confusing. Consider for example Copa Libertadores Femenina (permanent link) with Category:Pages using flagicon template with unknown parameters. The page has 135 {{flagicon}}. The unknown parameter is in {{flagicon|BRA|side=30px}} (should have said size). It's common to track down where a category is added by previewing different parts of the code. That fails here when the category is never added in preview. You can search for the preview warning in the preview but users may not know that. Previews can add things but shouldn't remove things. PrimeHunter (talk) 11:36, 9 December 2023 (UTC)Reply
Latest comment: 5 days ago7 comments3 people in discussion
Is it possible to add a function to use Lua patterns and also limit the number? For example, if the parameter |date= can be between |date1= and |date8= and using regexp1 = "date[%d]+" and something like reglimit1=8 to limit the allowed parameters? Gonnym (talk) 12:26, 23 June 2024 (UTC)Reply
Why not write a specific pattern? regexp1="date[1-8]"
Nevermind, got it to work without the quotes of course. I'll update the /doc here. Gonnym (talk) 13:09, 23 June 2024 (UTC)Reply
You could also look at the check at {{Interlinear}} for a fun example. It supports values of 1–99 for some parameters (actually 1 and higher, but I'm hoping nobody will put in more than 99 unnamed parameters). – Jonesey95 (talk) 19:43, 24 June 2024 (UTC)Reply
The pattern [1-9][%d]* (should probably be written [1-9]%d*) is not limited to the range 1–99. %d* means 0 or more digits. So, as long as the first digit is not zero, any number of digits (within reason) will be accepted. If you want to actually limit the range to 1–99 you might use %f[%d][1-9]%d?$ where (right to left) $ anchors the pattern to the end of the parameter name string; %d? means 0 or 1 digits; [1-9] requires the first digit of the enumeration to be in the range 1–9; %f[%d] is the frontier pattern where the next character is a digit but the previous character is not a digit – in abc123 the pattern finds the boundary between c (parameter name) and 1 (first digit of the enumerator).
