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[ginac.git] / ginac / basic.h

diff --git a/ginac/basic.h b/ginac/basic.h
index a8062c15c81d4460e86f571a4ecb636d3c9df5f0..1a471b32337a3989ab8aea7b3954f567ed8450f5 100644 (file)
--- a/ginac/basic.h
+++ b/ginac/basic.h
@@ -3,7 +3,7 @@
  *  Interface to GiNaC's ABC. */
 
 /*
- *  GiNaC Copyright (C) 1999-2015 Johannes Gutenberg University Mainz, Germany
+ *  GiNaC Copyright (C) 1999-2019 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
@@ -92,7 +92,8 @@ struct map_function {
 
 /** Degenerate base class for visitors. basic and derivative classes
  *  support Robert C. Martin's Acyclic Visitor pattern (cf.
- *  http://objectmentor.com/publications/acv.pdf). */
+ *  http://condor.depaul.edu/dmumaugh/OOT/Design-Principles/acv.pdf
+ *  or chapter 10 of Andrei Alexandrescu's "Modern C++ Design"). */
 class visitor {
 protected:
        virtual ~visitor() {}
@@ -135,8 +136,8 @@ public: // only const functions please (may break reference counting)
        }
 
        // evaluation
-       virtual ex eval(int level = 0) const;
-       virtual ex evalf(int level = 0) const;
+       virtual ex eval() const;
+       virtual ex evalf() const;
        virtual ex evalm() const;
        virtual ex eval_integ() const;
 protected:
@@ -199,7 +200,7 @@ public:
        virtual ex series(const relational & r, int order, unsigned options = 0) const;
 
        // rational functions
-       virtual ex normal(exmap & repl, exmap & rev_lookup, int level = 0) const;
+       virtual ex normal(exmap & repl, exmap & rev_lookup) const;
        virtual ex to_rational(exmap & repl) const;
        virtual ex to_polynomial(exmap & repl) const;
 
@@ -304,8 +305,6 @@ protected:
 
 // global variables
 
-extern int max_recursion_level;
-
 
 // convenience type checker template functions