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config: require Parameters keys to be Field[T] 

This has been good practice for ages. Enforce it.
This commit is contained in:
Wesley W. Terpstra 2017-09-07 13:29:14 -07:00
parent 42f1ae27fc
commit 09d8d476c5
1 changed files with 11 additions and 11 deletions
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22
src/main/scala/config/Config.scala
View File

@ -2,7 +2,7 @@
package freechips.rocketchip.config
class Field[T]
abstract class Field[T]
abstract class View {
final def apply[T](pname: Field[T]): T = apply(pname, this)
@ -13,7 +13,7 @@ abstract class View {
final def lift[T](pname: Field[T]): Option[T] = lift(pname, this)
final def lift[T](pname: Field[T], site: View): Option[T] = find(pname, site).map(_.asInstanceOf[T])
protected[config] def find(pname: Any, site: View): Option[Any]
protected[config] def find[T](pname: Field[T], site: View): Option[T]
}
abstract class Parameters extends View {
@ -21,8 +21,8 @@ abstract class Parameters extends View {
final def alter(f: (View, View, View) => PartialFunction[Any,Any]): Parameters = Parameters(f) ++ this
final def alterPartial(f: PartialFunction[Any,Any]): Parameters = Parameters((_,_,_) => f) ++ this
protected[config] def chain(site: View, tail: View, pname: Any): Option[Any]
protected[config] def find(pname: Any, site: View) = chain(site, new TerminalView, pname)
protected[config] def chain[T](site: View, tail: View, pname: Field[T]): Option[T]
protected[config] def find[T](pname: Field[T], site: View) = chain(site, new TerminalView, pname)
}
object Parameters {
@ -34,7 +34,7 @@ object Parameters {
class Config(p: Parameters) extends Parameters {
def this(f: (View, View, View) => PartialFunction[Any,Any]) = this(Parameters(f))
protected[config] def chain(site: View, tail: View, pname: Any) = p.chain(site, tail, pname)
protected[config] def chain[T](site: View, tail: View, pname: Field[T]) = p.chain(site, tail, pname)
override def toString = this.getClass.getSimpleName
def toInstance = this
}
@ -42,24 +42,24 @@ class Config(p: Parameters) extends Parameters {
// Internal implementation:
private class TerminalView extends View {
def find(pname: Any, site: View): Option[Any] = None
def find[T](pname: Field[T], site: View): Option[T] = None
}
private class ChainView(head: Parameters, tail: View) extends View {
def find(pname: Any, site: View) = head.chain(site, tail, pname)
def find[T](pname: Field[T], site: View) = head.chain(site, tail, pname)
}
private class ChainParameters(x: Parameters, y: Parameters) extends Parameters {
def chain(site: View, tail: View, pname: Any) = x.chain(site, new ChainView(y, tail), pname)
def chain[T](site: View, tail: View, pname: Field[T]) = x.chain(site, new ChainView(y, tail), pname)
}
private class EmptyParameters extends Parameters {
def chain(site: View, tail: View, pname: Any) = tail.find(pname, site)
def chain[T](site: View, tail: View, pname: Field[T]) = tail.find(pname, site)
}
private class PartialParameters(f: (View, View, View) => PartialFunction[Any,Any]) extends Parameters {
protected[config] def chain(site: View, tail: View, pname: Any) = {
protected[config] def chain[T](site: View, tail: View, pname: Field[T]) = {
val g = f(site, this, tail)
if (g.isDefinedAt(pname)) Some(g.apply(pname)) else tail.find(pname, site)
if (g.isDefinedAt(pname)) Some(g.apply(pname).asInstanceOf[T]) else tail.find(pname, site)
}
}