// -*- C++ -*-
/***************************************************************************
 * blitz/vecexprwrap.h   Vector expression templates wrapper class
 *
 * $Id: vecexprwrap.h 1414 2005-11-01 22:04:59Z cookedm $
 *
 * Copyright (C) 1997-2001 Todd Veldhuizen <tveldhui@oonumerics.org>
 *
 * This code was relicensed under the modified BSD license for use in SciPy
 * by Todd Veldhuizen (see LICENSE.txt in the weave directory).
 *
 *
 * Suggestions:          blitz-dev@oonumerics.org
 * Bugs:                 blitz-bugs@oonumerics.org
 *
 * For more information, please see the Blitz++ Home Page:
 *    http://oonumerics.org/blitz/
 *
 ***************************************************************************/

#ifndef BZ_VECEXPRWRAP_H
#define BZ_VECEXPRWRAP_H

#ifndef BZ_BLITZ_H
 #include <blitz/blitz.h>
#endif

BZ_NAMESPACE(blitz)

template<typename P_expr>
class _bz_VecExpr {

public:
    typedef P_expr T_expr;
    typedef _bz_typename T_expr::T_numtype T_numtype;

#ifdef BZ_PASS_EXPR_BY_VALUE
    _bz_VecExpr(T_expr a)
        : iter_(a)
    { }
#else
    _bz_VecExpr(const T_expr& a)
        : iter_(a)
    { }
#endif

#ifdef BZ_MANUAL_VECEXPR_COPY_CONSTRUCTOR
    _bz_VecExpr(const _bz_VecExpr<T_expr>& a)
        : iter_(a.iter_)
    { }
#endif

    T_numtype operator[](int i) const
    { return iter_[i]; }

    T_numtype operator()(int i) const
    { return iter_(i); }

    int length(int recommendedLength) const
    { return iter_.length(recommendedLength); }

    static const int 
        _bz_staticLengthCount = P_expr::_bz_staticLengthCount,
        _bz_dynamicLengthCount = P_expr::_bz_dynamicLengthCount,
        _bz_staticLength = P_expr::_bz_staticLength;

    int _bz_suggestLength() const
    { return iter_._bz_suggestLength(); }

    bool _bz_hasFastAccess() const
    { return iter_._bz_hasFastAccess(); }

    T_numtype _bz_fastAccess(int i) const
    { return iter_._bz_fastAccess(i); }

private:
    _bz_VecExpr();

    T_expr iter_;
};

BZ_NAMESPACE_END

#endif // BZ_VECEXPRWRAP_H
