Check argument count

[ghost]

It would be nice to check argument count in function calls 😃

[alerque]

How would you imagine this working? What exactly would we even be looking for? I don't see how this would be remotely possible in the current architecture. It seems like could only be implemented by a Lua runtime and impossible to discern with any degree of meaningfulness from just a syntax parser / linter — but perhaps I'm missing what you expect.

[appgurueu]

With very basic data flow analysis reliability could be achieved at least for local functions which are only defined once (or where only one definition may reach a certain place), so something like the following could be warned about:

local function f(a, b) ... end
f(1)

but due to Lua's dynamic dispatch, a general solution is not possible

[alerque]

I'm not convinced even a local-only approach would be feasible but I'm be willing to review a PR if somebody implements this at least to POC stage.