InSync

Lua patterns have some interesting features of their own: * %bxy where *`x`* and *`y`* and two distinct characters matches a sequence starts with *`x`* and ends with *`y`* so...

Currently I have this as a workaround: ```py # @cache won't work _seen = set() def _leave_whitespace(element: ParserElement) -> ParserElement: if expression in _seen: return element _seen.add(element) if hasattr(element, 'expr'):...

@ptmcg Thanks. It would be nice if you document methods like this one so that we users know which ones are implementation details and which are not. Also, the method...

Regarding the second task, I'm not sure whether there is anything to work on other than the following meta-configurations: ### `pyproject.toml` https://github.com/pyparsing/pyparsing/blob/2a1a8e8f4beee7fd120c3fdc1a48725b77e263c2/pyproject.toml#L11 https://github.com/pyparsing/pyparsing/blob/2a1a8e8f4beee7fd120c3fdc1a48725b77e263c2/pyproject.toml#L12-L33 ### `.pre-commit-config.yaml` https://github.com/pyparsing/pyparsing/blob/2a1a8e8f4beee7fd120c3fdc1a48725b77e263c2/.pre-commit-config.yaml#L6 ### `.github/workflows/ci.yml` https://github.com/pyparsing/pyparsing/blob/2a1a8e8f4beee7fd120c3fdc1a48725b77e263c2/.github/workflows/ci.yml#L25

`self`-like variables in `__new__` should also be exempted: ```py class C: def __new__(cls): instance = super().__new__(cls) instance._foo = 42 return instance ``` ```shell $ ruff check --select SLF001 foo.py ```...

A simple PyCharm plugin should take about a few hundred lines of Kotlin code, given that the executable is already installed on the user's machine. IntelliJ IDE's LSP support is...

Do you intend to continue the work on this PR soon? If not, I can take it over.

> I think most of the remaining uncertainty is how to use our LSP to provide the same experience in both paid and free PyCharm versions. There's [LSP4IJ](https://github.com/redhat-developer/lsp4ij). [Its support...

I'm considering this too, but LSP4IJ has no non-nightly releases yet. Besides, I think I need to play with it for some time first.

@fbricon Thanks. I'll start working on it.