Provide public SignalID trait to be used to conjure up a signal identifier.

2 files changed, 23 insertions, 1 deletions

diff --git a/chiselFrontend/src/main/scala/chisel3/core/Module.scala b/chiselFrontend/src/main/scala/chisel3/core/Module.scala
index 5af744c4..4f25515b 100644
--- a/chiselFrontend/src/main/scala/chisel3/core/Module.scala
+++ b/chiselFrontend/src/main/scala/chisel3/core/Module.scala
@@ -63,6 +63,9 @@ extends HasId {
   /** Legalized name of this module. */
   final val name = Builder.globalNamespace.name(desiredName)
 
+  /** Signal name (for simulation). */
+  override def signalName(component: Component) = name
+
   /** IO for this Module. At the Scala level (pre-FIRRTL transformations),
     * connections in and out of a Module may only go through `io` elements.
     */
diff --git a/chiselFrontend/src/main/scala/chisel3/internal/Builder.scala b/chiselFrontend/src/main/scala/chisel3/internal/Builder.scala
index cecbd91e..dd4b3264 100644
--- a/chiselFrontend/src/main/scala/chisel3/internal/Builder.scala
+++ b/chiselFrontend/src/main/scala/chisel3/internal/Builder.scala
@@ -55,11 +55,30 @@ private[chisel3] class IdGen {
   }
 }
 
-private[chisel3] trait HasId {
+/** Public API to Nodes.
+  * currently, the node's name, the full path name, and a reference to its parent.
+  */
+trait SignalID {
+  def signalName(component: Component): String
+  def signalPathName(component: Component, separator: String = "_"): String
+  def signalParent: Module
+}
+
+private[chisel3] trait HasId extends SignalID {
   private[chisel3] def _onModuleClose {} // scalastyle:ignore method.name
   private[chisel3] val _parent = Builder.dynamicContext.currentModule
   _parent.foreach(_.addId(this))
 
+  // Implementation of public methods.
+  override def signalParent = _parent.get
+  override def signalName(component: Component) = _ref.get.fullName(component)
+  override def signalPathName(component: Component, separator: String = "_"): String = {
+    _parent match {
+      case Some(p) => p.signalPathName(component, separator) + separator + signalName(component)
+      case None => signalName(component)
+    }
+  }
+
   private[chisel3] val _id = Builder.idGen.next
   override def hashCode: Int = _id.toInt
   override def equals(that: Any): Boolean = that match {