A @Poko class is similar to a data class: the Poko compiler plugin will generate equals, hashCode, and toString functions for any Kotlin class marked with this annotation. Unlike normal data classes, copy or componentN functions are not generated. This makes it easier to maintain data models in libraries without breaking binary compatibility.

The generated functions will be based on class properties in the primary constructor. Class properties not in the primary constructor will not be included, and primary constructor parameters that are not class properties will not be included. Compilation will fail if the annotated class does not include a primary constructor.

Each function will only be generated if it is not already manually overridden in the annotated class.

The annotated class cannot be a data class, an inline class, or an inner class.

Like data classes, it is highly recommended that all properties used in equals/hashCode are immutable. vars, mutable collections, and especially arrays should be avoided. The class itself should also be final. The compiler plugin does not enforce these recommendations.