Help writing correct grammar

[02JanDal]

TL;DR: How do I get this working

I'm trying to write a Pest grammar to parse MapCSS (no definitive formal specification, but most information can be found here), and I'm struggling with a part of grammar.

Part of the syntax is that you can write conditions such as [building=residential] or [width<10] (similar to attribute selectors in normal CSS). I have a list of such selectors in the grammar (all looking something like condition_equality = { tag ~ "=" ~ value } but with different operators and sometimes a different right side sub-rule), but based on the error I get not all conditions are considered.

The relevant part of the code is here

[tomtau]

Which one is the top-level rule to run? One thing I can't see in the grammar is something that would match [ and ] -- when I remove them (i.e. the input string is restriction=no_left_turn) and select the condition_equality rule, it seems to work as intended?

[02JanDal]

The condition_selector rule is the "top level rule", it's a pair of brackets and then a choice between all the other condition_* rules. The fact that condition_equality indeed does match the contents in the brackets just makes it even weirder to me, especially as condition_equality is not even mentioned as an option at that location (while for example condition_inequality is mentioned, despite the only difference being the operator):

 --> 1:2
  |
1 | [restriction=no_left_turn]
  |  ^---
  |
  = expected condition_anti_clockwise, condition_clockwise, condition_falsy, condition_gt, condition_gte, condition_inequality, condition_lt, condition_lte, condition_membership, condition_negated_regex, condition_not_setting, condition_postfix, condition_prefix, condition_regex, condition_setting, condition_substring, condition_territory, or condition_truthy