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package cask.router
import scala.annotation.StaticAnnotation
class doc(s: String) extends StaticAnnotation
/**
* Models what is known by the router about a single argument: that it has
* a [[name]], a human-readable [[typeString]] describing what the type is
* (just for logging and reading, not a replacement for a `TypeTag`) and
* possible a function that can compute its default value
*/
case class ArgSig[I, -T, +V, -C](name: String,
typeString: String,
doc: Option[String],
default: Option[T => V])
(implicit val reads: ArgReader[I, V, C])
trait ArgReader[I, +T, -C]{
def arity: Int
def read(ctx: C, label: String, input: I): T
}
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