# HG changeset patch
# User Paul Boddie <paul@boddie.org.uk>
# Date 1512260943 -3600
# Node ID fbaf500f40648862ef37d83793af1e7e60ed6598
# Parent  11bf85dcefd0670904584522c0f62546f22667aa
Give the LimitSelector and StartSelector special level identifiers, simplifying
the selector sorting activity.

diff -r 11bf85dcefd0 -r fbaf500f4064 vRecurrence.py
--- a/vRecurrence.py	Sun Dec 03 01:16:48 2017 +0100
+++ b/vRecurrence.py	Sun Dec 03 01:29:03 2017 +0100
@@ -292,7 +292,7 @@
         return PositionSelector(None, args, "BYSETPOS")
 
     elif qualifier == "COUNT":
-        return LimitSelector(0, args, "COUNT")
+        return LimitSelector(-2, args, "COUNT")
 
     else:
         return Pattern(freq[qualifier], args, qualifier)
@@ -301,7 +301,7 @@
 
     "Return a copy of 'selectors' incorporating 'dt'."
 
-    selectors = selectors + [StartSelector(0, {"start" : dt}, "DTSTART")]
+    selectors = selectors + [StartSelector(-1, {"start" : dt}, "DTSTART")]
     selectors.sort(key=selector_sort_key)
     return selectors
 
@@ -327,25 +327,18 @@
 
     "Produce a sort key for 'selector'."
 
-    # Make DTSTART sort later than COUNT.
-
-    if selector.qualifier == "COUNT":
-        sublevel = 0
-    elif selector.qualifier == "DTSTART":
-        sublevel = 1
-
     # Make BYSETPOS sort earlier than the enumeration it modifies.
 
-    elif selector.qualifier == "BYSETPOS":
-        sublevel = 2
+    if selector.qualifier == "BYSETPOS":
+        sublevel = 0
 
     # Other BY... qualifiers sort earlier than selectors at the same resolution
     # even though such things as "FREQ=HOURLY;BYHOUR=10" do not make much sense.
 
     elif selector.qualifier.startswith("BY"):
-        sublevel = 3
+        sublevel = 1
     else:
-        sublevel = 4
+        sublevel = 2
 
     return (selector.level, sublevel)