- rotate_31() and golden_hash_ratio() moved to utils.h

[ginac.git] / ginac / operators.h

diff --git a/ginac/operators.h b/ginac/operators.h
index 7ccd39f69bf17cdcafe665281bc28f0be0811229..4c95a55164a81adf4b7c67325a009b3361b74346 100644 (file)
--- a/ginac/operators.h
+++ b/ginac/operators.h
@@ -1,7 +1,8 @@
 /** @file operators.h
  *
- *  Interface to GiNaC's overloaded operators.
- *
+ *  Interface to GiNaC's overloaded operators. */
+
+/*
  *  GiNaC Copyright (C) 1999 Johannes Gutenberg University Mainz, Germany
  *
  *  This program is free software; you can redistribute it and/or modify
@@ -24,6 +25,12 @@
 
 #include <iostream>
 
+namespace GiNaC {
+
+class ex;
+class numeric;
+class relational;
+
 // binary arithmetic operators ex with ex
 ex operator+(ex const & lh, ex const & rh);
 ex operator-(ex const & lh, ex const & rh);
@@ -118,4 +125,6 @@ relational operator>=(numeric const & lh, ex const & rh);
 ostream & operator<<(ostream & os, ex const & e);
 istream & operator>>(istream & is, ex & e);
 
+} // namespace GiNaC
+
 #endif // ndef __GINAC_OPERATORS_H__