* Interface to symbolic matrices */
/*
- * GiNaC Copyright (C) 1999-2003 Johannes Gutenberg University Mainz, Germany
+ * GiNaC Copyright (C) 1999-2005 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
*
* 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
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef __GINAC_MATRIX_H__
namespace GiNaC {
+
+/** Helper template to allow initialization of matrices via an overloaded
+ * comma operator (idea stolen from Blitz++). */
+template <typename T, typename It>
+class matrix_init {
+public:
+ matrix_init(It i) : iter(i) {}
+
+ matrix_init<T, It> operator,(const T & x)
+ {
+ *iter = x;
+ return matrix_init<T, It>(++iter);
+ }
+
+ // The following specializations produce much tighter code than the
+ // general case above
+
+ matrix_init<T, It> operator,(int x)
+ {
+ *iter = T(x);
+ return matrix_init<T, It>(++iter);
+ }
+
+ matrix_init<T, It> operator,(unsigned int x)
+ {
+ *iter = T(x);
+ return matrix_init<T, It>(++iter);
+ }
+
+ matrix_init<T, It> operator,(long x)
+ {
+ *iter = T(x);
+ return matrix_init<T, It>(++iter);
+ }
+
+ matrix_init<T, It> operator,(unsigned long x)
+ {
+ *iter = T(x);
+ return matrix_init<T, It>(++iter);
+ }
+
+ matrix_init<T, It> operator,(double x)
+ {
+ *iter = T(x);
+ return matrix_init<T, It>(++iter);
+ }
+
+ matrix_init<T, It> operator,(const symbol & x)
+ {
+ *iter = T(x);
+ return matrix_init<T, It>(++iter);
+ }
+
+private:
+ matrix_init();
+ It iter;
+};
+
+
/** Symbolic matrices. */
class matrix : public basic
{
matrix(unsigned r, unsigned c);
matrix(unsigned r, unsigned c, const exvector & m2);
matrix(unsigned r, unsigned c, const lst & l);
+
+ // First step of initialization of matrix with a comma-separated seqeuence
+ // of expressions. Subsequent steps are handled by matrix_init<>::operator,().
+ matrix_init<ex, exvector::iterator> operator=(const ex & x)
+ {
+ m[0] = x;
+ return matrix_init<ex, exvector::iterator>(++m.begin());
+ }
// functions overriding virtual functions from base classes
public:
ex add_indexed(const ex & self, const ex & other) const;
ex scalar_mul_indexed(const ex & self, const numeric & other) const;
bool contract_with(exvector::iterator self, exvector::iterator other, exvector & v) const;
+ ex conjugate() const;
protected:
bool match_same_type(const basic & other) const;
matrix inverse() const;
matrix solve(const matrix & vars, const matrix & rhs,
unsigned algo = solve_algo::automatic) const;
+ unsigned rank() const;
protected:
ex determinant_minor() const;
int gauss_elimination(const bool det = false);
inline matrix inverse(const matrix & m)
{ return m.inverse(); }
+inline unsigned rank(const matrix & m)
+{ return m.rank(); }
+
// utility functions
/** Specialization of is_exactly_a<matrix>(obj) for matrix objects. */