Added mathsym+tcc and boost against all advice

eo/contrib/mathsym/sym/SymImpl.h

@@ -0,0 +1,103 @@
+/*	    
+ *             Copyright (C) 2005 Maarten Keijzer
+ *
+ *          This program is free software; you can redistribute it and/or modify
+ *          it under the terms of version 2 of the GNU General Public License as 
+ *          published by the Free Software Foundation. 
+ *
+ *          This program is distributed in the hope that it will be useful,
+ *          but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *          MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *          GNU General Public License for more details.
+ *
+ *          You should have received a copy of the GNU General Public License
+ *          along with this program; if not, write to the Free Software
+ *          Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+#ifndef __SYM_IMPL_H__
+#define __SYM_IMPL_H__
+
+#include <vector>
+
+#include "token.h"
+
+class Sym;
+namespace detail {
+
+class SymArgsImpl;
+class SymArgs {
+    
+    mutable SymArgsImpl* pimpl; // contains circular reference to vector<Sym>
+    mutable const std::vector<Sym>* args_ptr;
+    
+    public:
+
+    SymArgs();
+    SymArgs(const std::vector<Sym>& v);
+    ~SymArgs();
+
+    SymArgs(const SymArgs& args);
+    const SymArgs& SymArgs::operator=(const SymArgs& other);
+
+    size_t len() const;
+    const std::vector<Sym>& vec() const { return *args_ptr; }
+    void fixate() const;
+};
+
+class SymKey
+{
+    public:
+	SymKey(token_t _token) : args(), token(_token) {}
+	SymKey(token_t _token, const detail::SymArgs& _args) : args(_args), token(_token) {}
+	
+	
+    private:
+	detail::SymArgs args;
+    public:
+	bool operator==(const SymKey& other) const;
+	
+	struct Hash
+	{
+	    int operator()(const SymKey& k) const { return k.calc_hash(); }; 
+	};
+	
+	unsigned arity() const { return args.len(); }
+	const std::vector<Sym>& vec() const { return args.vec(); }
+	
+	token_t token;     // identifies the function
+
+	// fixates (i.e. claims memory) for the embedded vector of Syms
+	void fixate() const { args.fixate(); }
+	
+    private:
+	int calc_hash() const;
+};
+
+struct SymValue
+{
+    friend class Sym;
+     
+    SymValue();
+    ~SymValue(); 
+    
+    unsigned getRefCount() const { return refcount; }
+    unsigned getSize() const     { return size; }
+    unsigned getDepth() const    { return depth; }
+    
+    private :
+    
+    // for reference counting
+    unsigned refcount;
+    
+    // some simple stats
+    unsigned size;
+    unsigned depth;
+    
+    UniqueNodeStats* uniqueNodeStats;
+};
+
+
+} // namespace detail
+
+#endif
+