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package Chisel
abstract class Namespace {
final def name(n: String): String = {
if (nameExists(n)) name(rename(n))
else {
names += n
n
}
}
def nameExists(n: String): Boolean
protected final def nameExistsHere(n: String): Boolean =
names contains n
private def rename(n: String): String = {
i += 1
s"${n}_${i}"
}
private var i = 0L
protected val names = collection.mutable.HashSet[String]()
}
class RootNamespace(initialNames: String*) extends Namespace {
names ++= initialNames
def nameExists(n: String) = nameExistsHere(n)
}
class ChildNamespace(parent: Namespace) extends Namespace {
def nameExists(n: String) = nameExistsHere(n) || parent.nameExists(n)
}
class FIRRTLNamespace extends RootNamespace("mem", "node", "wire", "reg", "inst")
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