final class infer extends Annotation with DirectMetadataParamStrategy

When a metadata parameter is annotated as @infer, RPC macro engine will materialize that parameter by searching for an implicit value of that parameter's type. @infer is the default strategy assumed for implicit parameters of metadata classes, so using this annotation explicitly is only needed when you want an implicit search done for non-implicit parameter. This may be useful if, e.g. you want an inferred parameter to be a case class field.

NOTE: By default, implicit search for @infer parameter does NOT affect the decision about whether some real method or real parameter matches a metadata parameter. For example, if an implicit for @infer parameter cannot be found, you will only know about it *after* the metadata materializing macro has already been expanded. This behaviour can be changed with checked annotation.

The @infer annotation may also be used on a parameter of an annotation reified with reifyAnnot in order to simulate implicit parameter. This is a workaround for the fact that Scala annotations cannot accept multiple parameter lists. In such situation, infer.value should be used as default value of "implicit" annotation parameter:

class valueWithCodec[T](value: T, @infer codec: GenCodec[T] = infer.value)
  extends scala.annotation.StaticAnnotation
Linear Supertypes
DirectMetadataParamStrategy, MetadataParamStrategy, StaticAnnotation, Annotation, AnyRef, Any
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  1. infer
  2. DirectMetadataParamStrategy
  3. MetadataParamStrategy
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Instance Constructors

  1. new infer(clue: String = "")

Value Members

  1. val clue: String