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> class A(b: B) : B by b // IS_A via composition I couldn't find the "B by b" syntax from the Kotlin docs, can you tell me that this does ?

• hota_mazi 9y ago
  It's delegation. Look at page 96 of this PDF file: https://kotlinlang.org/docs/kotlin-docs.pdf https://kotlinlang.org/docs/kotlin-docs.pdf
  • eiffel31 9y ago
    Thank you, wish Java had this :'(