Diff: tvmet/xpr/Literal.h

Revision:

25:143b19c1fb05

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/tvmet/xpr/Literal.h	Wed Oct 17 22:22:28 2012 +0000
@@ -0,0 +1,90 @@
+/*
+ * 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: Literal.h,v 1.13 2007-06-23 15:58:59 opetzold Exp $
+ */
+
+#ifndef TVMET_XPR_LITERAL_H
+#define TVMET_XPR_LITERAL_H
+
+namespace tvmet {
+
+
+/**
+ * \class XprLiteral Literal.h "tvmet/xpr/Literal.h"
+ * \brief Specify literals like scalars into the expression.
+ *        This expression is used for vectors and matrices - the
+ *        decision is done by the access operator.
+ */
+template<class T>
+class XprLiteral
+  : public TvmetBase< XprLiteral<T> >
+{
+  XprLiteral();
+  XprLiteral& operator=(const XprLiteral&);
+
+public:
+  typedef T						value_type;
+
+public:
+  /** Complexity counter. */
+  enum {
+    ops       = 1
+  };
+
+public:
+  /** Constructor by value for literals . */
+  explicit XprLiteral(value_type value)
+    : m_data(value)
+  { }
+
+  /** Copy Constructor. Not explicit! */
+#if defined(TVMET_OPTIMIZE_XPR_MANUAL_CCTOR)
+  XprLiteral(const XprLiteral& e)
+    : m_data(e.m_data)
+  { }
+#endif
+
+  /** Index operator, gives the value for vectors. */
+  value_type operator()(std::size_t) const { return m_data; }
+
+  /** Index operator for arrays/matrices. */
+  value_type operator()(std::size_t, std::size_t) const { return m_data; }
+
+public: // debugging Xpr parse tree
+  void print_xpr(std::ostream& os, std::size_t l=0) const {
+    os << IndentLevel(l++) << "XprLiteral[O=" << ops << "]<T="
+       << typeid(value_type).name()
+       << ">," << std::endl;
+  }
+
+private:
+  const value_type 					m_data;
+};
+
+
+} // namespace tvmet
+
+#endif // TVMET_XPR_LITERAL_H
+
+// Local Variables:
+// mode:C++
+// tab-width:8
+// End: