Fix some pedantic compiler warnings.

[ginac.git] / ginac / basic.h

diff --git a/ginac/basic.h b/ginac/basic.h
index 534a5915de2d6a8f7ead70952da60c9515ee3508..0295d015920e1807464d51c5df309e25abd82a7d 100644 (file)
--- a/ginac/basic.h
+++ b/ginac/basic.h
@@ -3,7 +3,7 @@
  *  Interface to GiNaC's ABC. */
 
 /*
- *  GiNaC Copyright (C) 1999-2008 Johannes Gutenberg University Mainz, Germany
+ *  GiNaC Copyright (C) 1999-2015 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
@@ -20,26 +20,26 @@
  *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
  */
 
-#ifndef __GINAC_BASIC_H__
-#define __GINAC_BASIC_H__
-
-#include <cstddef> // for size_t
-#include <vector>
-#include <set>
-#include <map>
-#include <typeinfo> // for typeid
-// CINT needs <algorithm> to work properly with <vector>
-#include <algorithm>
+#ifndef GINAC_BASIC_H
+#define GINAC_BASIC_H
 
 #include "flags.h"
 #include "ptr.h"
 #include "assertion.h"
 #include "registrar.h"
 
+// CINT needs <algorithm> to work properly with <vector>
+#include <algorithm>
+#include <cstddef> // for size_t
+#include <map>
+#include <set>
+#include <typeinfo> // for typeid
+#include <vector>
+
 namespace GiNaC {
 
 class ex;
-class ex_is_less;
+struct ex_is_less;
 class symbol;
 class numeric;
 class relational;
@@ -241,6 +241,23 @@ public:
 
        void print_dispatch(const registered_class_info & ri, const print_context & c, unsigned level) const;
 
+       /** Save (serialize) the object into archive node.
+        *
+        * Losely speaking, this method turns an expression into a byte
+        * stream (which can be saved and restored later on, or sent via
+        * network, etc.)
+        */
+       virtual void archive(archive_node& n) const;
+       /** Load (deserialize) the object from an archive node.
+        *
+        *  @note This method is essentially a constructor. However,
+        *  constructors can't be virtual. So, if unarchiving routines
+        *  are implemented as constructors one would need to define such
+        *  a constructor in every class, even if all it does is simply
+        *  calling constructor of a superclass.
+        */
+       virtual void read_archive(const archive_node& n, lst& syms); // no const
+
        ex subs_one_level(const exmap & m, unsigned options) const;
        ex diff(const symbol & s, unsigned nth = 1) const;
        int compare(const basic & other) const;
@@ -293,7 +310,7 @@ extern int max_recursion_level;
 template <class T>
 inline bool is_a(const basic &obj)
 {
-       return dynamic_cast<const T *>(&obj) != 0;
+       return dynamic_cast<const T *>(&obj) != nullptr;
 }
 
 /** Check if obj is a T, not including base classes. */
@@ -305,4 +322,4 @@ inline bool is_exactly_a(const basic & obj)
 
 } // namespace GiNaC
 
-#endif // ndef __GINAC_BASIC_H__
+#endif // ndef GINAC_BASIC_H