Is there a way to limit the number/types of compon...

# compose-desktop

[Jimmy]

Is there a way to limit the number/types of components in a composable and to make the compiler complain about it (i.e. compile error, not runtime)?
Say for instance, that I have my own Button implementation where I only want to allow first one Icon and then one Text, in that order.

[jim]

You could have your button take in a vectorIcon and a String , and have the button be responsible for emitting the appropriate child widgets, instead of taking in a generic children lambda which is relatively unconstrained.

[Colton Idle]

Yeah. That's what we do. We constrain what can go into our design systems button.

[Jimmy]

Right, a button was only an example, but I get what you mean.
Feels like it's not the compose way though, had hoped there would be some magic under the hood that could be used.

[Colton Idle]

It's just a function. So to me it seems like the compose way would be to use the language to your advantage.

[Jimmy]

True, but composing views with the lambdas make the code look neat. So it's not just a function, it's a good looking function 😄
But I guess I'll do something like that. Thanks.

[Timo Drick]

Maybe an other more convient way is to provide a scope with a DSL that only have specific composables included:

interface RestrictedContentScope {
    @Composable fun CompanyButton()
    @Composable fun CompanyText()
}

@Composable
fun RestrictedContent(content: RestrictedContentScope.() -> Unit) {
    val scope = object : RestrictedContentScope {
        override fun CompanyButton() {
            Button(onClick = {}) {
                //...
            }
        }

        override fun CompanyText() {
            Text("")
        }
    }
    content(scope)
}

Please note that the content is not a composable so it is here restricted to use custom composables.