X-Git-Url: https://www.ginac.de/ginac.git//ginac.git?a=blobdiff_plain;f=ginac%2Fadd.cpp;h=6548366ee16f1facb3dab2c1751444730171f236;hb=5fb83676210401cc08fae91831514bac44502209;hp=4c857044d5df509892cce89bfbafe8bd99b45c79;hpb=1602530f716ba1d425a0667b897182b99c374823;p=ginac.git

diff --git a/ginac/add.cpp b/ginac/add.cpp
index 4c857044..6548366e 100644
--- a/ginac/add.cpp
+++ b/ginac/add.cpp
@@ -3,7 +3,7 @@
  *  Implementation of GiNaC's sums of expressions. */
 
 /*
- *  GiNaC Copyright (C) 1999-2009 Johannes Gutenberg University Mainz, Germany
+ *  GiNaC Copyright (C) 1999-2010 Johannes Gutenberg University Mainz, Germany
  *
  *  This program is free software; you can redistribute it and/or modify
  *  it under the terms of the GNU General Public License as published by
@@ -224,6 +224,16 @@ bool add::info(unsigned inf) const
 		case info_flags::integer_polynomial:
 		case info_flags::cinteger_polynomial:
 		case info_flags::rational_polynomial:
+		case info_flags::real:
+		case info_flags::rational:
+		case info_flags::integer:
+		case info_flags::crational:
+		case info_flags::cinteger:
+		case info_flags::positive:
+		case info_flags::nonnegative:
+		case info_flags::posint:
+		case info_flags::nonnegint:
+		case info_flags::even:
 		case info_flags::crational_polynomial:
 		case info_flags::rational_function: {
 			epvector::const_iterator i = seq.begin(), end = seq.end();
@@ -232,6 +242,8 @@ bool add::info(unsigned inf) const
 					return false;
 				++i;
 			}
+			if (overall_coeff.is_zero() && (inf == info_flags::positive || inf == info_flags::posint))
+				return true;
 			return overall_coeff.info(inf);
 		}
 		case info_flags::algebraic: {