X-Git-Url: https://www.ginac.de/ginac.git//ginac.git?p=ginac.git;a=blobdiff_plain;f=ginac%2Fex.h;h=774b8600a2407accaf5b3788f6fbfa0732b34713;hp=82ac4ab570db6a5fbd6e3c5944c1a39f8bcb8809;hb=da6a61ba2586263e46ade4b67dca121506c2bff9;hpb=3ac17e18ada69428fe170c10abcc5f33a30f0676

diff --git a/ginac/ex.h b/ginac/ex.h
index 82ac4ab5..774b8600 100644
--- a/ginac/ex.h
+++ b/ginac/ex.h
@@ -3,7 +3,7 @@
  *  Interface to GiNaC's light-weight expression handles. */
 
 /*
- *  GiNaC Copyright (C) 1999-2006 Johannes Gutenberg University Mainz, Germany
+ *  GiNaC Copyright (C) 1999-2007 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
@@ -52,6 +52,12 @@ private:
 /** For construction of flyweights, etc. */
 static library_init library_initializer;
 
+/** Rotate bits of unsigned value by one bit to the left.
+  * This can be necesary if the user wants to define its own hashes. */
+inline unsigned rotate_left(unsigned n)
+{
+	return (n & 0x80000000U) ? (n << 1 | 0x00000001U) : (n << 1);
+}
 
 class scalar_products;
 class const_iterator;
@@ -59,10 +65,11 @@ class const_preorder_iterator;
 class const_postorder_iterator;
 
 
-/** 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.  (Some people call such
- *  a thing a proxy class.) */
+/** Lightweight wrapper for GiNaC's symbolic objects.  It holds a pointer to
+ *  the other object in order to do garbage collection by the method of
+ *  reference counting.  I.e., it is a smart pointer.  Also, the constructor
+ *  ex::ex(const basic & other) calls the methods that do automatic
+ *  evaluation.  E.g., x-x turns automatically into 0. */
 class ex {
 	friend class archive_node;
 	friend inline bool are_ex_trivially_equal(const ex &, const ex &);
@@ -134,11 +141,13 @@ public:
 	ex lhs() const;
 	ex rhs() const;
 
-	// complex conjugation
+	// function for complex expressions
 	ex conjugate() const { return bp->conjugate(); }
+	ex real_part() const { return bp->real_part(); }
+	ex imag_part() const { return bp->imag_part(); }
 
 	// pattern matching
-	bool has(const ex & pattern) const { return bp->has(pattern); }
+	bool has(const ex & pattern, unsigned options = 0) const { return bp->has(pattern, options); }
 	bool find(const ex & pattern, lst & found) const;
 	bool match(const ex & pattern) const;
 	bool match(const ex & pattern, lst & repl_lst) const { return bp->match(pattern, repl_lst); }
@@ -159,6 +168,7 @@ public:
 	void traverse(visitor & v) const { traverse_preorder(v); }
 
 	// degree/coeff
+	bool is_polynomial(const ex & vars) const;
 	int degree(const ex & s) const { return bp->degree(s); }
 	int ldegree(const ex & s) const { return bp->ldegree(s); }
 	ex coeff(const ex & s, int n = 1) const { return bp->coeff(s, n); }
@@ -202,6 +212,7 @@ public:
 	int compare(const ex & other) const;
 	bool is_equal(const ex & other) const;
 	bool is_zero() const { extern const ex _ex0; return is_equal(_ex0); }
+	bool is_zero_matrix() const;
 	
 	// symmetry
 	ex symmetrize() const;
@@ -213,7 +224,7 @@ public:
 
 	// noncommutativity
 	unsigned return_type() const { return bp->return_type(); }
-	const basic* return_type_tinfo() const { return bp->return_type_tinfo(); }
+	tinfo_t return_type_tinfo() const { return bp->return_type_tinfo(); }
 
 	unsigned gethash() const { return bp->gethash(); }
 
@@ -674,6 +685,11 @@ struct ex_swap : public std::binary_function<ex, ex, void> {
 	void operator() (ex &lh, ex &rh) const { lh.swap(rh); }
 };
 
+// Make it possible to print exvectors and exmaps
+std::ostream & operator<<(std::ostream & os, const exvector & e);
+std::ostream & operator<<(std::ostream & os, const exset & e);
+std::ostream & operator<<(std::ostream & os, const exmap & e);
+
 // wrapper functions around member functions
 inline size_t nops(const ex & thisex)
 { return thisex.nops(); }
@@ -684,12 +700,21 @@ inline ex expand(const ex & thisex, unsigned options = 0)
 inline ex conjugate(const ex & thisex)
 { return thisex.conjugate(); }
 
-inline bool has(const ex & thisex, const ex & pattern)
-{ return thisex.has(pattern); }
+inline ex real_part(const ex & thisex)
+{ return thisex.real_part(); }
+
+inline ex imag_part(const ex & thisex)
+{ return thisex.imag_part(); }
+
+inline bool has(const ex & thisex, const ex & pattern, unsigned options = 0)
+{ return thisex.has(pattern, options); }
 
 inline bool find(const ex & thisex, const ex & pattern, lst & found)
 { return thisex.find(pattern, found); }
 
+inline bool is_polynomial(const ex & thisex, const ex & vars)
+{ return thisex.is_polynomial(vars); }
+
 inline int degree(const ex & thisex, const ex & s)
 { return thisex.degree(s); }
 
@@ -843,6 +868,52 @@ public:
 	ex operator()(const ex & e) { return ptr(e, arg1, arg2, arg3); }
 };
 
+template<class C>
+class pointer_to_member_to_map_function : public map_function {
+protected:
+	ex (C::*ptr)(const ex &);
+	C &c;
+public:
+	explicit pointer_to_member_to_map_function(ex (C::*member)(const ex &), C &obj) : ptr(member), c(obj) {}
+	ex operator()(const ex & e) { return (c.*ptr)(e); }
+};
+
+template<class C, class T1>
+class pointer_to_member_to_map_function_1arg : public map_function {
+protected:
+	ex (C::*ptr)(const ex &, T1);
+	C &c;
+	T1 arg1;
+public:
+	explicit pointer_to_member_to_map_function_1arg(ex (C::*member)(const ex &, T1), C &obj, T1 a1) : ptr(member), c(obj), arg1(a1) {}
+	ex operator()(const ex & e) { return (c.*ptr)(e, arg1); }
+};
+
+template<class C, class T1, class T2>
+class pointer_to_member_to_map_function_2args : public map_function {
+protected:
+	ex (C::*ptr)(const ex &, T1, T2);
+	C &c;
+	T1 arg1;
+	T2 arg2;
+public:
+	explicit pointer_to_member_to_map_function_2args(ex (C::*member)(const ex&, T1, T2), C &obj, T1 a1, T2 a2) : ptr(member), c(obj), arg1(a1), arg2(a2) {}
+	ex operator()(const ex & e) { return (c.*ptr)(e, arg1, arg2); }
+};
+
+template<class C, class T1, class T2, class T3>
+class pointer_to_member_to_map_function_3args : public map_function {
+protected:
+	ex (C::*ptr)(const ex &, T1, T2, T3);
+	C &c;
+	T1 arg1;
+	T2 arg2;
+	T3 arg3;
+public:
+	explicit pointer_to_member_to_map_function_3args(ex (C::*member)(const ex &, T1, T2, T3), C &obj, T1 a1, T2 a2, T3 a3) : ptr(member), c(obj), arg1(a1), arg2(a2), arg3(a3) {}
+	ex operator()(const ex & e) { return (c.*ptr)(e, arg1, arg2, arg3); }
+};
+
 inline ex ex::map(ex f(const ex &)) const
 {
 	pointer_to_map_function fcn(f);