Suggestion: LongParameterList rule but on method call if named argument is not used

[cyfung]

Can we have a rule which warns method call with long parameter list IF named arguments is not used.

I know the rule LongParameterList exists, but I think it is not a problem if named arguments is used when calling the methods.

[arturbosch]

So basically a rule to enforce named arguments when a function call needs > than threshold arguments?
Sounds like a good rule to me, wdyt?

[cyfung]

Yes, that's what I was thinking.

[sowmyav24]

Is this issue still valid ? I can see the rule LongParameterList already has ignoreDefaultParameters configuration to consider defaults for parameters and does not include default parameters in the parameters count.

[cortinico]

Is this issue still valid?

Yes I think so. Do you want to pick it up @sowmyav24?
If not I'll be happy to do it.

Currently the LongParameterList is checking function declarations with too many parameters. Ideally we could have a rule that checks function invocation with too many parameters and reports if the parameter list is above a threshold (as @arturbosch suggested).

[sowmyav24]

Yes, My query was more around the scenario where the threshhold is 2 and the function declaration is
fun foo(val a, val b, val c =1, val d= 1)

Here the function can be invoked as
foo(1,2,3,4)
or
foo(1, 2)

Currently, LongParameterList will not report this function as we ignore default parameters.
But if we go with the route of function invocation, the result would be,
foo(1,2,3,4) will be reported and foo(1, 2) will be not which would be ambiguous.