Is there a more reliable way to check if a parameter is a lambda, besides this horror? ```private fu...

# detekt

[Davide Giuseppe Farella]

Is there a more reliable way to check if a parameter is a lambda, besides this horror?

private fun isLambda(parameter: KtParameter) = ") -> " in parameter.text

Note that isLambdaParameter and isFunctionTypeParameter evaluate the KtParameter as a parameter of a lambda block

[Brais Gabin]

🤔 I'm on my modile so I can't check. But I know that I did some like this for forbiddenMethodCall. I mean, I had code there to check if a parameter is a lambda. You could check there.

[Davide Giuseppe Farella]

I'm from mobile as well, so I might be wrong, but seems like that code is not there anymore

[Brais Gabin]

The magic is inside FunctionMatcher. You receive the lambda as a kotlin.FunctionN type.

[Brais Gabin]

where N can be 0, 1, 2, 3...

[Davide Giuseppe Farella]

Thank you so much! I'll try that tomorrow first thing!

[Davide Giuseppe Farella]

I looked into the class, but it seems like also there, we make a string comparison ( param.startsWith("(") ).

Side note: I might misunderstood the use case, but from that function, I noted 2 things:
• It never matches a lambda, as the String would be something like block: () -> Unit , so it would never start with (
• Does it consider lambda with a receiver? Even matching the type only, it would fail with Scope.() -> Unit
Are these intended, or are they bugs? 🙂

[Brais Gabin]

That class does two things:
• Parse a String that comes from the config
• Match that configuration with functions.

[Davide Giuseppe Farella]

Oh, I see 🙏