/** @file ex.h
*
- * Interface to GiNaC's light-weight expression handles.
- *
- * GiNaC Copyright (C) 1999 Johannes Gutenberg University Mainz, Germany
+ * Interface to GiNaC's light-weight expression handles. */
+
+/*
+ * GiNaC Copyright (C) 1999-2000 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
#include <ginac/basic.h>
#include <ginac/operators.h>
+#ifndef NO_GINAC_NAMESPACE
+namespace GiNaC {
+#endif // ndef NO_GINAC_NAMESPACE
+
class ex;
class expand_options;
class status_flags;
class symbol;
class lst;
-typedef vector<ex> exvector;
+extern ex const & _ex0(void); /* FIXME: should this pollute headers? */
-// enum definitions
-
-ex const & exZERO(void);
-ex const & exONE(void);
-ex const & exTWO(void);
-ex const & exTHREE(void);
-ex const & exMINUSONE(void);
-ex const & exHALF(void);
-ex const & exMINUSHALF(void);
+// typedef vector<ex> exvector;
#define INLINE_EX_CONSTRUCTORS
-/** Lightweight interface to GiNaC's symbolic objects. Basically all it does is
+/** Lightweight wrapper for GiNaC's symbolic objects. Basically all it does is
* to hold a pointer to the other objects, manage the reference counting and
* provide methods for manipulation of these objects. */
class ex
public:
ex()
#ifdef INLINE_EX_CONSTRUCTORS
- : bp(exZERO().bp)
+ : bp(_ex0().bp)
{
- debugmsg("ex default constructor",LOGLEVEL_CONSTRUCT);
- ASSERT(exZERO().bp!=0);
- ASSERT(exZERO().bp->flags & status_flags::dynallocated);
- ASSERT(bp!=0);
+ GINAC_ASSERT(_ex0().bp!=0);
+ GINAC_ASSERT(_ex0().bp->flags & status_flags::dynallocated);
+ GINAC_ASSERT(bp!=0);
++bp->refcount;
+#ifdef OBSCURE_CINT_HACK
+ update_last_created_or_assigned_bp();
+#endif // def OBSCURE_CINT_HACK
}
#else
;
~ex()
#ifdef INLINE_EX_CONSTRUCTORS
{
- debugmsg("ex destructor",LOGLEVEL_DESTRUCT);
- ASSERT(bp!=0);
- ASSERT(bp->flags & status_flags::dynallocated);
+ GINAC_ASSERT(bp!=0);
+ GINAC_ASSERT(bp->flags & status_flags::dynallocated);
if (--bp->refcount == 0) {
delete bp;
}
#ifdef INLINE_EX_CONSTRUCTORS
: bp(other.bp)
{
- debugmsg("ex copy constructor",LOGLEVEL_CONSTRUCT);
- ASSERT(bp!=0);
- ASSERT((bp->flags) & status_flags::dynallocated);
+ GINAC_ASSERT(bp!=0);
+ GINAC_ASSERT((bp->flags) & status_flags::dynallocated);
++bp->refcount;
+#ifdef OBSCURE_CINT_HACK
+ update_last_created_or_assigned_bp();
+#endif // def OBSCURE_CINT_HACK
}
#else
;
ex const & operator=(ex const & other)
#ifdef INLINE_EX_CONSTRUCTORS
{
- debugmsg("ex operator=",LOGLEVEL_ASSIGNMENT);
- ASSERT(bp!=0);
- ASSERT(bp->flags & status_flags::dynallocated);
- ASSERT(other.bp!=0);
- ASSERT(other.bp->flags & status_flags::dynallocated);
+ GINAC_ASSERT(bp!=0);
+ GINAC_ASSERT(bp->flags & status_flags::dynallocated);
+ GINAC_ASSERT(other.bp!=0);
+ GINAC_ASSERT(other.bp->flags & status_flags::dynallocated);
++other.bp->refcount;
basic * tmpbp=other.bp;
if (--bp->refcount==0) {
delete bp;
}
bp=tmpbp;
+#ifdef OBSCURE_CINT_HACK
+ update_last_created_or_assigned_bp();
+#endif // def OBSCURE_CINT_HACK
return *this;
}
#else
public:
ex(basic const & other)
#ifdef INLINE_EX_CONSTRUCTORS
- {
- debugmsg("ex constructor from basic",LOGLEVEL_CONSTRUCT);
- construct_from_basic(other);
- }
+ {
+ construct_from_basic(other);
+#ifdef OBSCURE_CINT_HACK
+ update_last_created_or_assigned_bp();
+#endif // def OBSCURE_CINT_HACK
+ }
#else
;
#endif // def INLINE_EX_CONSTRUCTORS
void dbgprint(void) const;
void dbgprinttree(void) const;
bool info(unsigned inf) const;
- int nops() const;
+ unsigned nops() const;
ex expand(unsigned options=0) const;
bool has(ex const & other) const;
int degree(symbol const & s) const;
int compare(ex const & other) const
#ifdef INLINE_EX_CONSTRUCTORS
{
- ASSERT(bp!=0);
- ASSERT(other.bp!=0);
+ GINAC_ASSERT(bp!=0);
+ GINAC_ASSERT(other.bp!=0);
if (bp==other.bp) {
// special case: both expression point to same basic, trivially equal
return 0;
bool is_equal(ex const & other) const
#ifdef INLINE_EX_CONSTRUCTORS
{
- ASSERT(bp!=0);
- ASSERT(other.bp!=0);
+ GINAC_ASSERT(bp!=0);
+ GINAC_ASSERT(other.bp!=0);
if (bp==other.bp) {
// special case: both expression point to same basic, trivially equal
return true;
#else
;
#endif // def INLINE_EX_CONSTRUCTORS
- bool is_zero(void) const {return compare(exZERO()) == 0;};
+ bool is_zero(void) const {return compare(_ex0())==0;};
unsigned return_type(void) const;
unsigned return_type_tinfo(void) const;
void construct_from_basic(basic const & other);
void makewriteable();
+#ifdef OBSCURE_CINT_HACK
+public:
+ static bool last_created_or_assigned_bp_can_be_converted_to_ex(void)
+ {
+ if (last_created_or_assigned_bp==0) return false;
+ if ((last_created_or_assigned_bp->flags &
+ status_flags::dynallocated)==0) return false;
+ if ((last_created_or_assigned_bp->flags &
+ status_flags::evaluated)==0) return false;
+ return true;
+ }
+protected:
+ void update_last_created_or_assigned_bp(void)
+ {
+ if (last_created_or_assigned_bp!=0) {
+ if (--last_created_or_assigned_bp->refcount == 0) {
+ delete last_created_or_assigned_bp;
+ }
+ }
+ last_created_or_assigned_bp=bp;
+ ++last_created_or_assigned_bp->refcount;
+ }
+#endif // def OBSCURE_CINT_HACK
+
// member variables
public:
basic *bp;
-
+#ifdef OBSCURE_CINT_HACK
+ static basic *last_created_or_assigned_bp;
+#endif // def OBSCURE_CINT_HACK
};
+// utility functions
+inline bool are_ex_trivially_equal(const ex &e1, const ex &e2)
+{
+ return e1.bp == e2.bp;
+}
+
// wrapper functions around member functions
-inline int nops(ex const & thisex)
+inline unsigned nops(ex const & thisex)
{ return thisex.nops(); }
inline ex expand(ex const & thisex, unsigned options = 0)
inline void swap(ex & e1, ex & e2)
{ e1.swap(e2); }
+#ifndef NO_GINAC_NAMESPACE
+} // namespace GiNaC
+#endif // ndef NO_GINAC_NAMESPACE
+
#endif // ndef __GINAC_EX_H__
+
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