What is a reified type parameter in Kotlin?
Tests JVM type erasure and inline function mechanics. Strong answer: reified preserves generic types at runtime via inline expansion, enabling is T checks without Class<T> passing. Red flag: claiming reified works without inline or outside functions.
Tests deep knowledge of JVM type erasure and how Kotlin uses inline functions to recover concrete generic types at call sites. A strong answer covers: type erasure strips T at runtime; inline copies bytecode so the compiler substitutes the actual type; reified enables is T and T::class without reflection hacks. Red flag: saying reified is just syntax sugar for Class<T> or that it works on normal functions.
Read the original → kotlinlang.org
- #kotlin
- #jvm
- #generics
- #inline-functions
- #type-erasure
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