text: // -*- C++ -*-
  /***************************************************************************
   * blitz/array/asexpr.h  Declaration of the asExpr helper functions
   *
   * $Id$
   *
   * Copyright (C) 1997-2011 Todd Veldhuizen <tveldhui@acm.org>
   *
   * This file is a part of Blitz.
   *
   * Blitz 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 3
   * of the License, or (at your option) any later version.
   *
   * Blitz 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 Blitz.  If not, see <http://www.gnu.org/licenses/>.
   * 
   * Suggestions:          blitz-devel@lists.sourceforge.net
   * Bugs:                 blitz-support@lists.sourceforge.net    
   *
   * For more information, please see the Blitz++ Home Page:
   *    https://sourceforge.net/projects/blitz/
   *
   ***************************************************************************/
  #ifndef BZ_ASEXPR_CC
  #define BZ_ASEXPR_CC
  
  #include <blitz/array/asexpr.h>
  #include <blitz/array-impl.h>
  #include <blitz/levicivita.h>
  #include <blitz/range.h>
  #include <blitz/array/expr.h>
  
  // implementations of asexpr functions.
  
  BZ_NAMESPACE(blitz)
  
  // default to scalar
  template <typename T>
  _bz_typename asExpr<T>::T_expr asExpr<T>::getExpr(const T& x)
  { return T_expr(x); }
  
  // expression template term just returns itself
  template <typename T>
  const _bz_typename asExpr<_bz_ArrayExpr<T> >::T_expr& 
  asExpr<_bz_ArrayExpr<T> >::getExpr(const T_expr& x) 
  { return x; }
  
  // array operand returns iterator
  template <typename T,int N>
  _bz_typename asExpr<Array<T,N> >::T_expr 
  asExpr<Array<T,N> >::getExpr(const Array<T,N>& x) 
  { return x.beginFast(); }
  
  //  tinyvector operand returns iterator
  template <typename T,int N>
  _bz_typename asExpr<TinyVector<T,N> >::T_expr
  asExpr<TinyVector<T,N> >::getExpr(const TinyVector<T,N>& x)
  { return x.beginFast(); }
  
  //  tinymatrix operands returns iterator
  template <typename T,int Nr, int Nc>
  _bz_typename asExpr<TinyMatrix<T,Nr, Nc> >::T_expr
  asExpr<TinyMatrix<T,Nr, Nc> >::getExpr(const TinyMatrix<T,Nr,Nc>& x) 
  { return x.beginFast(); }
  
  //  Index placeholder returns itself
  template <int N>
  _bz_typename asExpr<IndexPlaceholder<N> >::T_expr
  asExpr<IndexPlaceholder<N> >::getExpr(const T_expr& x)
   { return x; }
  
  //  the levi-civita symbol
  inline asExpr<LeviCivita>::T_expr
  asExpr<LeviCivita>::getExpr(T_expr x) 
  { return T_expr(x); }
  
  //  Range
  inline asExpr<Range>::T_expr
  asExpr<Range>::getExpr(T_expr x) 
  { return T_expr(x); }
  
  BZ_NAMESPACE_END
  
  #endif
  