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clarified names;
authorwenzelm
Tue, 29 Sep 2020 13:52:01 +0200
changeset 72334 6916b48b375c
parent 72333 0823524eea1e
child 72335 b8708212bdd5
clarified names;
src/Pure/Concurrent/isabelle_thread.scala file | annotate | diff | comparison | revisions 
--- a/src/Pure/Concurrent/isabelle_thread.scala	Tue Sep 29 13:20:27 2020 +0200
+++ b/src/Pure/Concurrent/isabelle_thread.scala	Tue Sep 29 13:52:01 2020 +0200
@@ -29,7 +29,11 @@
   private val counter = Counter.make()
 
   def make_name(name: String = "", base: String = "thread"): String =
-    "Isabelle." + proper_string(name).getOrElse(base + counter())
+  {
+    val prefix = "Isabelle."
+    val suffix = if (name.nonEmpty) name else base + counter()
+    if (suffix.startsWith(prefix)) suffix else prefix + suffix
+  }
 
   def current_thread_group: ThreadGroup = Thread.currentThread.getThreadGroup
isabelle