# HG changeset patch
# User Paul Boddie <paul@boddie.org.uk>
# Date 1512948757 -3600
# Node ID 1faaf5e25d5e9526b312b13bc13311881771b527
# Parent  75e2141acfd9017a6896d2fdff0976170a1bca9e
Added copying and comparison support to selectors.

diff -r 75e2141acfd9 -r 1faaf5e25d5e vRecurrence.py
--- a/vRecurrence.py	Sat Dec 09 22:35:53 2017 +0100
+++ b/vRecurrence.py	Mon Dec 11 00:32:37 2017 +0100
@@ -950,6 +950,17 @@
     def set_values(self, values):
         self.args["values"] = values
 
+    # Copying and comparison support.
+
+    def as_tuple(self):
+        return self.level, self.args, self.qualifier, self.selecting
+
+    def copy(self):
+        return self.__class__(*self.as_tuple())
+
+    def __cmp__(self, other):
+        return cmp(self.as_tuple(), other and other.as_tuple())
+
 class Pattern(Selector):
 
     "A selector of time periods according to a repeating pattern."
@@ -1003,6 +1014,11 @@
         self.args["interval"] = interval
         self.update_step()
 
+    # Copying and comparison support.
+
+    def as_tuple(self):
+        return self.level, self.args, self.qualifier, self.selecting, self.first
+
 class Enum(Selector):
 
     "A generic value selector."