- minor cleanup

[ginac.git] / ginac / operators.h

diff --git a/ginac/operators.h b/ginac/operators.h
index b84d38b6eb85affb6b7a294b99b68f4ec389cc3f..22d89370abdaabf97fc569e7587c5a07a2a145ad 100644 (file)
--- a/ginac/operators.h
+++ b/ginac/operators.h
@@ -74,12 +74,12 @@ const numeric operator++(numeric & lh, int);
 const numeric operator--(numeric & lh, int);
 
 // binary relational operators ex with ex
-relational operator==(const ex & lh, const ex & rh);
-relational operator!=(const ex & lh, const ex & rh);
-relational operator<(const ex & lh, const ex & rh);
-relational operator<=(const ex & lh, const ex & rh);
-relational operator>(const ex & lh, const ex & rh);
-relational operator>=(const ex & lh, const ex & rh);
+const relational operator==(const ex & lh, const ex & rh);
+const relational operator!=(const ex & lh, const ex & rh);
+const relational operator<(const ex & lh, const ex & rh);
+const relational operator<=(const ex & lh, const ex & rh);
+const relational operator>(const ex & lh, const ex & rh);
+const relational operator>=(const ex & lh, const ex & rh);
 
 // input/output stream operators
 std::ostream & operator<<(std::ostream & os, const ex & e);