I'm writing a DSL. It's something like this. ```class Scope { fun method(block: () -> Unit) ...

# getting-started

[Jason5lee]

I'm writing a DSL. It's something like this.

class Scope {
    fun method(block: () -> Unit) {}
}

fun scope(block: Scope.() -> Unit) {}

fun main() {
    scope {
        method {
            method {  } // I want to disallow using the scope inside the method
        }
    }
}

I want to disallow calling method on the Scope inside the method.

I know I can have a dummy receive object and mark the Scope and the dummy object DslMarker.

@DslMarker
annotation class MyDslMarker

@MyDslMarker
class Scope {
    fun method(block: Context.() -> Unit) {}
}

@MyDslMarker
object Context // Dummy object

fun scope(block: Scope.() -> Unit) {}

fun main() {
    scope {
        method {
            method {  } // Compiler error now
        }
    }
}

Any better solution?

[Sam]

Sounds like you need @DslMarker guess you edited your post to include this already

[Sam]

https://kotlinlang.org/docs/type-safe-builders.html#scope-control-dslmarker

[Jason5lee]

Can I do it without adding dummy receiver object?

[Sam]

Ah, I think I see the problem. That’s interesting, I’m not sure

[Sam]

I can’t spot any other way, I think your approach might be the best solution