@OptIn(ExperimentalContracts::class)

@file:OptIn(ExperimentalContracts::class)

Only the top-level functions can have a contract for now

[GLSL dot man page](<http://www.opengl.org/sdk/docs/manglsl/xhtml/dot.xml>)

[GLSL](<http://www.opengl.org/sdk/docs/manglsl/xhtml/dot.xml>)

class SomeUseCase(//dependencies) {
    sealed class Error {
        object NetworkError : Error()
        object NoResultFound : Error()
    }
    sealed class Success {
        object OneSuccess : Success()
        object TwoSuccess : Success()
    }
    suspend operator fun invoke(): Either<Error, Success> {//code}
}

Success

Error

internal

inline fun Document.addParagraph(title: String, block: Paragraph.() -> Unit) {
    add(Paragraph(title).apply(block))
}

inline fun Document.addParagraph(title: String, block: Paragraph.() -> Unit) {
    add(Paragraph(title).apply(block))
}

"string".toByteArray

UseCase

UseCase

fun interface UseCase<Parameters, Result> : suspend (Parameters) -> Result

class SomeUseCase : UseCase<String, Int> {
    override suspend fun invoke(parameter: String): Int = parameter.toInt()
}

class SomeUseCase : suspend (String) -> Int {
    override suspend fun invoke(parameter: String): Int = parameter.toInt()
}

data class

UseCase

Type mismatch.
Required: suspend (Int) → Int
Found:    (Int) → Int

@sendsEvent