From: Martin Kronbichler <kronbichler@lnm.mw.tum.de>
Date: Fri, 21 Nov 2014 22:55:05 +0000 (+0100)
Subject: Allow comparison == and != of TriaAccessorBase with different tria
X-Git-Tag: v8.2.0-rc1~50^2
X-Git-Url: https://gitweb.dealii.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=5590c8e8643b801e63a6bae866391462b8dee9e9;p=dealii.git

Allow comparison == and != of TriaAccessorBase with different tria

It is well-defined to check for equality and inequality of TriaAccessorBase (cell_iterator types) that belong to different triangulations. Those are simply unequal. This is necessary e.g. for comparing with a default constructed cell_iterator variable. Of course, operator < is still undefined.
---

diff --git a/include/deal.II/grid/tria_accessor.templates.h b/include/deal.II/grid/tria_accessor.templates.h
index 020d51f390..97232e4268 100644
--- a/include/deal.II/grid/tria_accessor.templates.h
+++ b/include/deal.II/grid/tria_accessor.templates.h
@@ -121,8 +121,8 @@ inline
 bool
 TriaAccessorBase<structdim,dim,spacedim>::operator == (const TriaAccessorBase<structdim,dim,spacedim> &a) const
 {
-  Assert (tria == a.tria, TriaAccessorExceptions::ExcCantCompareIterators());
-  return ((present_level == a.present_level) &&
+  return ((tria == a.tria) &&
+          (present_level == a.present_level) &&
           (present_index == a.present_index));
 }
 
@@ -133,8 +133,8 @@ inline
 bool
 TriaAccessorBase<structdim,dim,spacedim>::operator != (const TriaAccessorBase<structdim,dim,spacedim> &a) const
 {
-  Assert (tria == a.tria, TriaAccessorExceptions::ExcCantCompareIterators());
-  return ((present_level != a.present_level) ||
+  return ((tria != a.tria) ||
+          (present_level != a.present_level) ||
           (present_index != a.present_index));
 }