From 18d6f5ebfb4de87307e02ab1117ff2365f13003d Mon Sep 17 00:00:00 2001
From: Salvo 'LtWorf' Tomaselli <tiposchi@tiscali.it>
Date: Wed, 19 Aug 2020 10:49:54 +0200
Subject: [PATCH] Remove add and sub from Rdate

They were not symmetrical, better to remove them.
---
 CHANGELOG            | 1 +
 relational/rtypes.py | 7 -------
 2 files changed, 1 insertion(+), 7 deletions(-)

diff --git a/CHANGELOG b/CHANGELOG
index 5af3e32..29cd016 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,4 +1,5 @@
 3.0
+- Dates can no longer be added or subtracted
 - Types are now inferred by column, no longer by cell
 - Relations now use frozenset internally and are immutable
 - Refactored parser to use better typing
diff --git a/relational/rtypes.py b/relational/rtypes.py
index 80b3373..26914dc 100644
--- a/relational/rtypes.py
+++ b/relational/rtypes.py
@@ -88,10 +88,6 @@ class Rdate:
     def __str__(self):
         return self.intdate.__str__()
 
-    def __add__(self, days):
-        res = self.intdate + datetime.timedelta(days)
-        return Rdate(res.__str__())
-
     def __eq__(self, other):
         if not isinstance(other, Rdate):
             return False
@@ -109,9 +105,6 @@ class Rdate:
     def __lt__(self, other):
         return self.intdate < other.intdate
 
-    def __sub__(self, other):
-        return (self.intdate - other.intdate).days
-
 
 def is_valid_relation_name(name: str) -> bool:
     '''Checks if a name is valid for a relation.