* Interface to GiNaC's ABC. */
/*
- * GiNaC Copyright (C) 1999-2000 Johannes Gutenberg University Mainz, Germany
+ * GiNaC Copyright (C) 1999-2003 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
#ifndef __GINAC_BASIC_H__
#define __GINAC_BASIC_H__
-#include <iostream>
-#include <typeinfo>
+#include <cstddef> // for size_t
#include <vector>
-
+#include <map>
// CINT needs <algorithm> to work properly with <vector>
#include <algorithm>
#include "assertion.h"
#include "registrar.h"
-#ifndef NO_NAMESPACE_GINAC
namespace GiNaC {
-#endif // ndef NO_NAMESPACE_GINAC
-class basic;
class ex;
+class ex_is_less;
class symbol;
-class lst;
class numeric;
class relational;
class archive_node;
+class print_context;
+template <class> class ptr;
+
+typedef std::vector<ex> exvector;
+typedef std::map<ex, ex, ex_is_less> exmap;
+
+
+/** Function object for map(). */
+struct map_function {
+ typedef const ex & argument_type;
+ typedef ex result_type;
+ virtual ex operator()(const ex & e) = 0;
+};
-// typedef std::vector<ex> exvector;
-typedef std::vector<ex,malloc_alloc> exvector; // CINT does not like vector<...,default_alloc>
-#define INLINE_BASIC_CONSTRUCTORS
+/** Degenerate base class for visitors. basic and derivative classes
+ * support Robert C. Martin's Acyclic Visitor pattern (cf.
+ * http://objectmentor.com/publications/acv.pdf). */
+class visitor {
+protected:
+ virtual ~visitor() {}
+};
+
/** This class is the ABC (abstract base class) of GiNaC's class hierarchy.
* It is responsible for the reference counting. */
class basic
{
- GINAC_DECLARE_REGISTERED_CLASS(basic, void)
-
+ GINAC_DECLARE_REGISTERED_CLASS_NO_CTORS(basic, void)
+
friend class ex;
+ friend class ptr<basic>;
+
+ // default constructor, destructor, copy constructor and assignment operator
+protected:
+ basic() : tinfo_key(TINFO_basic), flags(0), refcount(0) {}
-// member functions
-
- // default constructor, destructor, copy constructor assignment operator and helpers
public:
- basic()
-#ifdef INLINE_BASIC_CONSTRUCTORS
- : tinfo_key(TINFO_basic), flags(0), refcount(0)
- {
- }
-#else
-;
-#endif // def INLINE_BASIC_CONSTRUCTORS
-
+ /** basic destructor, virtual because class ex will delete objects of
+ * derived classes via a basic*. */
virtual ~basic()
-#ifdef INLINE_BASIC_CONSTRUCTORS
{
- destroy(0);
GINAC_ASSERT((!(flags & status_flags::dynallocated))||(refcount==0));
}
-#else
-;
-#endif // def INLINE_BASIC_CONSTRUCTORS
-
- basic(const basic & other)
-#ifdef INLINE_BASIC_CONSTRUCTORS
- {
- copy(other);
- }
-#else
-;
-#endif // def INLINE_BASIC_CONSTRUCTORS
-
+ basic(const basic & other);
const basic & operator=(const basic & other);
-
-protected:
- void copy(const basic & other)
- {
- flags = other.flags & ~status_flags::dynallocated;
- hashvalue = other.hashvalue;
- tinfo_key = other.tinfo_key;
- }
- void destroy(bool call_parent) {}
-
- // other constructors
- basic(unsigned ti)
-#ifdef INLINE_BASIC_CONSTRUCTORS
- : tinfo_key(ti), flags(0), refcount(0)
- {
- }
-#else
-;
-#endif // def INLINE_BASIC_CONSTRUCTORS
- // functions overriding virtual functions from bases classes
- // none
+protected:
+ /** Constructor with specified tinfo_key (used by derived classes instead
+ * of the default constructor to avoid assigning tinfo_key twice). */
+ basic(unsigned ti) : tinfo_key(ti), flags(0), refcount(0) {}
// new virtual functions which can be overridden by derived classes
public: // only const functions please (may break reference counting)
- virtual basic * duplicate() const;
- virtual void print(std::ostream & os,unsigned upper_precedence = 0) const;
- virtual void printraw(std::ostream & os) const;
- virtual void printtree(std::ostream & os, unsigned indent) const;
- virtual void printcsrc(std::ostream & os, unsigned type, unsigned upper_precedence = 0) const;
- virtual void dbgprint(void) const;
- virtual void dbgprinttree(void) const;
+
+ /** Create a clone of this object on the heap. One can think of this as
+ * simulating a virtual copy constructor which is needed for instance by
+ * the refcounted construction of an ex from a basic. */
+ virtual basic * duplicate() const { return new basic(*this); }
+
+ // evaluation
+ virtual ex eval(int level = 0) const;
+ virtual ex evalf(int level = 0) const;
+ virtual ex evalm() const;
+protected:
+ virtual ex eval_ncmul(const exvector & v) const;
+public:
+ virtual ex eval_indexed(const basic & i) const;
+
+ // printing
+ virtual void print(const print_context & c, unsigned level = 0) const;
+ virtual void dbgprint() const;
+ virtual void dbgprinttree() const;
+ virtual unsigned precedence() const;
+
+ // info
virtual bool info(unsigned inf) const;
- virtual unsigned nops() const;
- virtual ex op(int i) const;
- virtual ex & let_op(int i);
+
+ // operand access
+ virtual size_t nops() const;
+ virtual ex op(size_t i) const;
virtual ex operator[](const ex & index) const;
- virtual ex operator[](int i) const;
+ virtual ex operator[](size_t i) const;
+ virtual ex & let_op(size_t i);
+ virtual ex & operator[](const ex & index);
+ virtual ex & operator[](size_t i);
+
+ // pattern matching
virtual bool has(const ex & other) const;
- virtual int degree(const symbol & s) const;
- virtual int ldegree(const symbol & s) const;
- virtual ex coeff(const symbol & s, int n = 1) const;
- virtual ex collect(const symbol & s) const;
- virtual ex eval(int level = 0) const;
- virtual ex evalf(int level = 0) const;
+ virtual bool match(const ex & pattern, lst & repl_lst) const;
+protected:
+ virtual bool match_same_type(const basic & other) const;
+public:
+
+ // substitutions
+ virtual ex subs(const exmap & m, unsigned options = 0) const;
+
+ // function mapping
+ virtual ex map(map_function & f) const;
+
+ // visitors and tree traversal
+ virtual void accept(GiNaC::visitor & v) const
+ {
+ if (visitor *p = dynamic_cast<visitor *>(&v))
+ p->visit(*this);
+ }
+
+ // degree/coeff
+ virtual int degree(const ex & s) const;
+ virtual int ldegree(const ex & s) const;
+ virtual ex coeff(const ex & s, int n = 1) const;
+
+ // expand/collect
+ virtual ex expand(unsigned options = 0) const;
+ virtual ex collect(const ex & s, bool distributed = false) const;
+
+ // differentiation and series expansion
+protected:
+ virtual ex derivative(const symbol & s) const;
+public:
virtual ex series(const relational & r, int order, unsigned options = 0) const;
- virtual ex subs(const lst & ls, const lst & lr) const;
- virtual ex normal(lst &sym_lst, lst &repl_lst, int level = 0) const;
+
+ // rational functions
+ virtual ex normal(exmap & repl, int level = 0) const;
virtual ex to_rational(lst &repl_lst) const;
- virtual numeric integer_content(void) const;
+ virtual ex to_polynomial(lst &repl_lst) const;
+
+ // polynomial algorithms
+ virtual numeric integer_content() const;
virtual ex smod(const numeric &xi) const;
- virtual numeric max_coefficient(void) const;
- virtual exvector get_indices(void) const;
- virtual ex simplify_ncmul(const exvector & v) const;
-protected: // non-const functions should be called from class ex only
- virtual ex derivative(const symbol & s) const;
+ virtual numeric max_coefficient() const;
+
+ // indexed objects
+ virtual exvector get_free_indices() const;
+ virtual ex add_indexed(const ex & self, const ex & other) const;
+ virtual ex scalar_mul_indexed(const ex & self, const numeric & other) const;
+ virtual bool contract_with(exvector::iterator self, exvector::iterator other, exvector & v) const;
+
+ // noncommutativity
+ virtual unsigned return_type() const;
+ virtual unsigned return_type_tinfo() const;
+
+protected: // functions that should be called from class ex only
virtual int compare_same_type(const basic & other) const;
virtual bool is_equal_same_type(const basic & other) const;
- virtual unsigned return_type(void) const;
- virtual unsigned return_type_tinfo(void) const;
- virtual unsigned calchash(void) const;
- virtual ex expand(unsigned options=0) const;
+ virtual unsigned calchash() const;
+
// non-virtual functions in this class
public:
- ex subs(const ex & e) const;
- ex diff(const symbol & s, unsigned nth=1) 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;
bool is_equal(const basic & other) const;
- const basic & hold(void) const;
- unsigned gethash(void) const {if (flags & status_flags::hash_calculated) return hashvalue; else return calchash();}
- unsigned tinfo(void) const {return tinfo_key;}
+ const basic & hold() const;
+ unsigned gethash() const { if (flags & status_flags::hash_calculated) return hashvalue; else return calchash(); }
+ unsigned tinfo() const {return tinfo_key;}
+
+ /** Set some status_flags. */
const basic & setflag(unsigned f) const {flags |= f; return *this;}
+
+ /** Clear some status_flags. */
const basic & clearflag(unsigned f) const {flags &= ~f; return *this;}
-protected:
- void ensure_if_modifiable(void) const;
-// member variables
+protected:
+ void ensure_if_modifiable() const;
+ // member variables
protected:
- unsigned tinfo_key;
- mutable unsigned flags;
- mutable unsigned hashvalue;
- static unsigned precedence;
- static unsigned delta_indent;
+ unsigned tinfo_key; ///< typeinfo
+ mutable unsigned flags; ///< of type status_flags
+ mutable unsigned hashvalue; ///< hash value
private:
- unsigned refcount;
+ size_t refcount; ///< reference counter, managed by ptr<basic>
};
-// global constants
-
-extern const basic some_basic;
-extern const type_info & typeid_basic;
// global variables
extern int max_recursion_level;
-// convenience macros
-
-#ifndef NO_NAMESPACE_GINAC
-
-#define is_of_type(OBJ,TYPE) \
- (dynamic_cast<TYPE *>(const_cast<GiNaC::basic *>(&OBJ))!=0)
-
-#define is_exactly_of_type(OBJ,TYPE) \
- ((OBJ).tinfo()==GiNaC::TINFO_##TYPE)
-#define is_ex_of_type(OBJ,TYPE) \
- (dynamic_cast<TYPE *>(const_cast<GiNaC::basic *>((OBJ).bp))!=0)
+// convenience type checker template functions
-#define is_ex_exactly_of_type(OBJ,TYPE) \
- ((*(OBJ).bp).tinfo()==GiNaC::TINFO_##TYPE)
-
-#else // ndef NO_NAMESPACE_GINAC
-
-#define is_of_type(OBJ,TYPE) \
- (dynamic_cast<TYPE *>(const_cast<basic *>(&OBJ))!=0)
-
-#define is_exactly_of_type(OBJ,TYPE) \
- ((OBJ).tinfo()==TINFO_##TYPE)
+/** Check if obj is a T, including base classes. */
+template <class T>
+inline bool is_a(const basic &obj)
+{
+ return dynamic_cast<const T *>(&obj) != 0;
+}
+
+/** Check if obj is a T, not including base classes. This one is just an
+ * inefficient default. It should in all time-critical cases be overridden
+ * by template specializations that use the TINFO_* constants directly. */
+template <class T>
+inline bool is_exactly_a(const class basic &obj)
+{
+ return obj.tinfo() == T::reg_info.tinfo_key;
+}
-#define is_ex_of_type(OBJ,TYPE) \
- (dynamic_cast<TYPE *>(const_cast<basic *>((OBJ).bp))!=0)
+/** Check if ex is a handle to a T, including base classes. */
+template <class T>
+inline bool is_a(const ex &obj)
+{
+ return is_a<T>(*obj.bp);
+}
-#define is_ex_exactly_of_type(OBJ,TYPE) \
- ((*(OBJ).bp).tinfo()==TINFO_##TYPE)
+/** Check if ex is a handle to a T, not including base classes. */
+template <class T>
+inline bool is_exactly_a(const ex &obj)
+{
+ return is_exactly_a<T>(*obj.bp);
+}
-#endif // ndef NO_NAMESPACE_GINAC
+/** Return a reference to the basic-derived class T object embedded in an
+ * expression. This is fast but unsafe: the result is undefined if the
+ * expression does not contain a T object at its top level. Hence, you
+ * should generally check the type of e first.
+ *
+ * @param e expression
+ * @return reference to pseries object
+ * @see is_exactly_a<class T>() */
+template <class T>
+inline const T &ex_to(const ex &e)
+{
+ GINAC_ASSERT(is_a<T>(e));
+ return static_cast<const T &>(*e.bp);
+}
-#ifndef NO_NAMESPACE_GINAC
} // namespace GiNaC
-#endif // ndef NO_NAMESPACE_GINAC
#endif // ndef __GINAC_BASIC_H__
git://www.ginac.de / ginac.git / blobdiff