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object whenAbsent

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  1. macro def value[T]: T

    If you want your parameter to have _both_ a @whenAbsent annotation and a Scala-level default value, you can use this macro to avoid writing the default value twice:

    If you want your parameter to have _both_ a @whenAbsent annotation and a Scala-level default value, you can use this macro to avoid writing the default value twice:

    case class Record(@whenAbsent(0) i: Int = whenAbsent.value)

    This is useful when you want the default value to be collectible by macros (e.g. OpenApiMetadata for REST). which is possible only with default value in annotation.