Diff: tvmet/xpr/UnOperator.h

Revision:

15:9c5aaeda36dc

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/tvmet/xpr/UnOperator.h	Sat Apr 06 20:57:54 2013 +0000
@@ -0,0 +1,99 @@
+/*
+ * Tiny Vector Matrix Library
+ * Dense Vector Matrix Libary of Tiny size using Expression Templates
+ *
+ * Copyright (C) 2001 - 2007 Olaf Petzold <opetzold@users.sourceforge.net>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ * $Id: UnOperator.h,v 1.17 2007-06-23 15:59:00 opetzold Exp $
+ */
+
+#ifndef TVMET_XPR_UNOPERATOR_H
+#define TVMET_XPR_UNOPERATOR_H
+
+namespace tvmet {
+
+
+/**
+ * \class XprUnOp UnOperator.h "tvmet/xpr/UnOperator.h"
+ * \brief Unary operator working on one subexpression.
+ *
+ * Using the access operator() the unary operation will be evaluated.
+ */
+template<class UnOp, class E>
+class XprUnOp
+  : public TvmetBase< XprUnOp<UnOp, E> >
+{
+  XprUnOp();
+  XprUnOp& operator=(const XprUnOp&);
+
+public:
+  typedef typename UnOp::value_type                value_type;
+
+public:
+  /** Complexity counter. */
+  enum {
+    ops_expr  = E::ops,
+    ops       = 1 * ops_expr
+  };
+
+public:
+  /** Constructor for an expressions. */
+  explicit XprUnOp(const E& e)
+    : m_expr(e)
+  { }
+
+  /** Copy Constructor. Not explicit! */
+#if defined(TVMET_OPTIMIZE_XPR_MANUAL_CCTOR)
+  XprUnOp(const XprUnOp& e)
+    : m_expr(e.m_expr)
+  { }
+#endif
+
+  /** Index operator, evaluates the expression inside. */
+  value_type operator()(std::size_t i) const {
+    return UnOp::apply_on(m_expr(i));
+  }
+
+  /** index operator for arrays/matrices. */
+  value_type operator()(std::size_t i, std::size_t j) const {
+    return UnOp::apply_on(m_expr(i, j));
+  }
+
+public: // debugging Xpr parse tree
+  void print_xpr(std::ostream& os, std::size_t l=0) const {
+    os << IndentLevel(l++)
+       << "XprUnOp[O="<< ops << ", (O=" << ops_expr << ")]<"
+       << std::endl;
+    UnOp::print_xpr(os, l);
+    m_expr.print_xpr(os, l);
+    os << IndentLevel(--l)
+       << ">," << std::endl;
+  }
+
+private:
+  const E                            m_expr;
+};
+
+
+} // namespace tvmet
+
+#endif // TVMET_XPR_UNOPERATOR_H
+
+// Local Variables:
+// mode:C++
+// tab-width:8
+// End: