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/* NSC -- new Scala compiler
* Copyright 2005-2013 LAMP/EPFL
* @author Paul Phillips
*/
package scala.tools
package cmd
/** This trait works together with others in scala.tools.cmd to allow
* declaratively specifying a command line program, with many attendant
* benefits. See scala.tools.cmd.DemoSpec for an example.
*/
trait Spec {
def referenceSpec: Reference
def programInfo: Spec.Info
protected def help(str: => String): Unit
protected def heading(str: => String): Unit = help("\n " + str)
type OptionMagic <: Opt.Implicit
protected implicit def optionMagicAdditions(s: String): OptionMagic
}
object Spec {
class Info(
val runner: String,
val usage: String,
val mainClass: String
)
object Info {
def apply(runner: String, help: String, mainClass: String): Info = new Info(runner, help, mainClass)
}
class Accumulator[T: FromString]() {
private var _buf: List[T] = Nil
def convert(s: String) = implicitly[FromString[T]] apply s
def apply(s: String): T = returning(convert(s))(_buf +:= _)
lazy val get = _buf
}
class Choices[T: FromString](val xs: List[T]) {
def fs: FromString[T] = implicitly[FromString[T]]
def contains(x: T) = xs contains x
override def toString = xs.mkString("{ ", ", ", " }")
}
class EnvironmentVar(val name: String) {
override def toString = "${%s}" format name
}
}
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