types/kotools.types.collection/NotEmptySet

NotEmptySet

@JvmInline

@Serializable(with = NotEmptySetSerializer::class)

@Since(version = KotoolsTypesVersion.V4_0_0)

value class NotEmptySet<out E> : NotEmptyCollection<E>

Represents a set that has at least one element of type E.

You can use the notEmptySetOf or the toNotEmptySet functions for creating an instance of this type.

Serialization and deserialization

The serialization and deserialization processes of this type behave like for the Set type.

Here's an example of Kotlin code that encodes and decodes this type using the JavaScript Object Notation (JSON) format from kotlinx.serialization:

val string: NotEmptySet<Int> = notEmptySetOf(1, 2, 3)
val encoded: String = Json.encodeToString(string)
assertEquals(expected = "[1,2,3]", actual = encoded)
val decoded: NotEmptySet<Int> = Json.decodeFromString(encoded)
assertEquals(expected = string, actual = decoded)