[Feature Request] Support nonstandardSymbol for Lambda-Style Functions about lua-language-server HOT 2 OPEN

I'm working with a similar syntax, a,b -> expr.

I was able to disable warnings for the lines my expression is used on with a plugin, though this doesn't properly integrate with the language server. You might be able to transform your syntax into the regular Lua syntax, which the language server would work with.

function OnSetText(uri, text)
    local diffs = {}

    for line in text:gmatch("->[^\n]*()") do
	    diffs[#diffs+1] = {
		    start = line - 1,
		    finish = line - 1,
		    text = "--[[@diagnostic disable-line: undefined-global, unknown-symbol, redundant-parameter]]"
	    }
    end
    
    return diffs
end

from lua-language-server.

I'm working with a similar syntax, a,b -> expr.

I was able to disable warnings for the lines my expression is used on with a plugin, though this doesn't properly integrate with the language server. You might be able to transform your syntax into the regular Lua syntax, which the language server would work with.

function OnSetText(uri, text)
    local diffs = {}

    for line in text:gmatch("->[^\n]*()") do
	    diffs[#diffs+1] = {
		    start = line - 1,
		    finish = line - 1,
		    text = "--[[@diagnostic disable-line: undefined-global, unknown-symbol, redundant-parameter]]"
	    }
    end
    
    return diffs
end

Yeah so I looked into this and realized it was the route I would have to take until this is supported. However, your precise solution is brittle from my perspective as it doesn't respect the precise syntax of lua expressions. (Stopping at a newline?). Also wouldn't support nested lambda expressions.
I would need to hook into something like LPEG. From my point of view, if I can't give it full and proper support, it's better to give no support.

from lua-language-server.