Disabled external gits

cs320-clp/src/amyc/ast/Identifier.scala

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+package amyc.ast
+
+object Identifier {
+  private val counter = new amyc.utils.UniqueCounter[String]
+
+  def fresh(name: String): Identifier = new Identifier(name)
+}
+
+// Denotes a unique identifier in an Amy program
+// Notice that we rely on reference equality to compare Identifiers.
+// The numeric id will be generated lazily,
+// so the Identifiers are numbered in order when we print the program.
+final class Identifier private(val name: String) {
+  private lazy val id = Identifier.counter.next(name)
+
+  def fullName = s"${name}_$id"
+
+  override def toString: String = name
+}