alpha 3.1. in this commit:

- finally get the Eval stuff right. get back to having Eval as
  a subclass of Matrix with limited functionality, and then,
  add a typedef MatrixType to get the actual matrix type.
- add swap(), findBiggestCoeff()
- bugfix by Ramon in Transpose
- new demo: doc/echelon.cpp

1 files changed, 64 insertions, 0 deletions

diff --git a/Eigen/src/Core/Swap.h b/Eigen/src/Core/Swap.h
new file mode 100644
index 000000000..cc1b2092b
--- /dev/null
+++ b/Eigen/src/Core/Swap.h
@@ -0,0 +1,64 @@
+// This file is part of Eigen, a lightweight C++ template library
+// for linear algebra. Eigen itself is part of the KDE project.
+//
+// Copyright (C) 2006-2008 Benoit Jacob <jacob@math.jussieu.fr>
+//
+// Eigen is free software; you can redistribute it and/or modify it under the
+// terms of the GNU General Public License as published by the Free Software
+// Foundation; either version 2 or (at your option) any later version.
+//
+// Eigen 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 Eigen; if not, write to the Free Software Foundation, Inc., 51
+// Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+//
+// As a special exception, if other files instantiate templates or use macros
+// or functions from this file, or you compile this file and link it
+// with other works to produce a work based on this file, this file does not
+// by itself cause the resulting work to be covered by the GNU General Public
+// License. This exception does not invalidate any other reasons why a work
+// based on this file might be covered by the GNU General Public License.
+
+#ifndef EIGEN_SWAP_H
+#define EIGEN_SWAP_H
+
+template<typename Scalar, typename Derived>
+template<typename OtherDerived>
+void MatrixBase<Scalar, Derived>::swap(const MatrixBase<Scalar, OtherDerived>& other)
+{
+  MatrixBase<Scalar, OtherDerived> *_other = const_cast<MatrixBase<Scalar, OtherDerived>*>(&other);
+  if(Traits::SizeAtCompileTime == Dynamic)
+  {
+    Scalar tmp;
+    if(Traits::IsVectorAtCompileTime)
+    {
+      assert(OtherDerived::Traits::IsVectorAtCompileTime && size() == _other->size());
+      for(int i = 0; i < size(); i++)
+      {
+        tmp = coeff(i);
+        coeffRef(i) = _other->coeff(i);
+        _other->coeffRef(i) = tmp;
+      }
+    }
+    else
+      for(int j = 0; j < cols(); j++)
+        for(int i = 0; i < rows(); i++)
+        {
+          tmp = coeff(i, j);
+          coeffRef(i, j) = _other->coeff(i, j);
+          _other->coeffRef(i, j) = tmp;
+        }
+  }
+  else // SizeAtCompileTime != Dynamic
+  {
+    typename Eval<Derived>::MatrixType buf(*this);
+    *this = other;
+    *_other = buf;
+  }
+}
+
+#endif // EIGEN_SWAP_H