valarray_before.h

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  template<typename _Tp>
    struct __fun<__greater, _Tp>
    {
      typedef bool result_type;
    };

  template<typename _Tp>
    struct __fun<__less_equal, _Tp>
    {
      typedef bool result_type;
    };

  template<typename _Tp>
    struct __fun<__greater_equal, _Tp>
    {
      typedef bool result_type;
    };

  template<typename _Tp>
    struct __fun<__equal_to, _Tp>
    {
      typedef bool result_type;
    };

  template<typename _Tp>
    struct __fun<__not_equal_to, _Tp>
    {
      typedef bool result_type;
    };

  //
  // Apply function taking a value/const reference closure
  //

  template<typename _Dom, typename _Arg>
    class _FunBase
    {
    public:
      typedef typename _Dom::value_type value_type;

      _FunBase(const _Dom& __e, value_type __f(_Arg))
      : _M_expr(__e), _M_func(__f) {}

      value_type operator[](size_t __i) const
      { return _M_func (_M_expr[__i]); }

      size_t size() const { return _M_expr.size ();}

    private:
      const _Dom& _M_expr;
      value_type (*_M_func)(_Arg);
    };

  template<class _Dom>
    struct _ValFunClos<_Expr,_Dom> : _FunBase<_Dom, typename _Dom::value_type>
    {
      typedef _FunBase<_Dom, typename _Dom::value_type> _Base;
      typedef typename _Base::value_type value_type;
      typedef value_type _Tp;

      _ValFunClos(const _Dom& __e, _Tp __f(_Tp)) : _Base(__e, __f) {}
    };

  template<typename _Tp>
    struct _ValFunClos<_ValArray,_Tp> : _FunBase<valarray<_Tp>, _Tp>
    {
      typedef _FunBase<valarray<_Tp>, _Tp> _Base;
      typedef _Tp value_type;

      _ValFunClos(const valarray<_Tp>& __v, _Tp __f(_Tp)) : _Base(__v, __f) {}
    };

  template<class _Dom>
    struct _RefFunClos<_Expr, _Dom>
    : _FunBase<_Dom, const typename _Dom::value_type&>
    {
      typedef _FunBase<_Dom, const typename _Dom::value_type&> _Base;
      typedef typename _Base::value_type value_type;
      typedef value_type _Tp;

      _RefFunClos(const _Dom& __e, _Tp __f(const _Tp&))
      : _Base(__e, __f) {}
    };

  template<typename _Tp>
    struct _RefFunClos<_ValArray, _Tp>
    : _FunBase<valarray<_Tp>, const _Tp&>
    {
      typedef _FunBase<valarray<_Tp>, const _Tp&> _Base;
      typedef _Tp value_type;

      _RefFunClos(const valarray<_Tp>& __v, _Tp __f(const _Tp&))
      : _Base(__v, __f) {}
    };

  //
  // Unary expression closure.
  //

  template<class _Oper, class _Arg>
    class _UnBase
    {
    public:
      typedef typename _Arg::value_type _Vt;
      typedef typename __fun<_Oper, _Vt>::result_type value_type;

      _UnBase(const _Arg& __e) : _M_expr(__e) {}

      value_type operator[](size_t __i) const
      { return _Oper()(_M_expr[__i]); }

      size_t size() const { return _M_expr.size(); }
      
    private:
      const _Arg& _M_expr;
    };

  template<class _Oper, class _Dom>
    struct _UnClos<_Oper, _Expr, _Dom>
    : _UnBase<_Oper, _Dom>
    {
      typedef _Dom _Arg;
      typedef _UnBase<_Oper, _Dom> _Base;
      typedef typename _Base::value_type value_type;

      _UnClos(const _Arg& __e) : _Base(__e) {}
    };

  template<class _Oper, typename _Tp>
    struct _UnClos<_Oper, _ValArray, _Tp>
    : _UnBase<_Oper, valarray<_Tp> >
    {
      typedef valarray<_Tp> _Arg;
      typedef _UnBase<_Oper, valarray<_Tp> > _Base;
      typedef typename _Base::value_type value_type;

      _UnClos(const _Arg& __e) : _Base(__e) {}
    };


  //
  // Binary expression closure.
  //

  template<class _Oper, class _FirstArg, class _SecondArg>
    class _BinBase
    {
    public:
      typedef typename _FirstArg::value_type _Vt;
      typedef typename __fun<_Oper, _Vt>::result_type value_type;

      _BinBase(const _FirstArg& __e1, const _SecondArg& __e2)
      : _M_expr1(__e1), _M_expr2(__e2) {}

      value_type operator[](size_t __i) const
      { return _Oper()(_M_expr1[__i], _M_expr2[__i]); }

      size_t size() const { return _M_expr1.size(); }

    private:
      const _FirstArg& _M_expr1;
      const _SecondArg& _M_expr2;
    };


  template<class _Oper, class _Clos>
    class _BinBase2
    {
    public:
      typedef typename _Clos::value_type _Vt;
      typedef typename __fun<_Oper, _Vt>::result_type value_type;

      _BinBase2(const _Clos& __e, const _Vt& __t)
      : _M_expr1(__e), _M_expr2(__t) {}

      value_type operator[](size_t __i) const
      { return _Oper()(_M_expr1[__i], _M_expr2); }

      size_t size() const { return _M_expr1.size(); }

    private:
      const _Clos& _M_expr1;
      const _Vt& _M_expr2;
    };

  template<class _Oper, class _Clos>
    class _BinBase1
    {
    public:
      typedef typename _Clos::value_type _Vt;
      typedef typename __fun<_Oper, _Vt>::result_type value_type;

      _BinBase1(const _Vt& __t, const _Clos& __e)
      : _M_expr1(__t), _M_expr2(__e) {}

      value_type operator[](size_t __i) const
      { return _Oper()(_M_expr1, _M_expr2[__i]); }

      size_t size() const { return _M_expr2.size(); }

    private:
      const _Vt& _M_expr1;
      const _Clos& _M_expr2;
    };

  template<class _Oper, class _Dom1, class _Dom2>
    struct _BinClos<_Oper, _Expr, _Expr, _Dom1, _Dom2>
    : _BinBase<_Oper, _Dom1, _Dom2>
    {
      typedef _BinBase<_Oper, _Dom1, _Dom2> _Base;
      typedef typename _Base::value_type value_type;

      _BinClos(const _Dom1& __e1, const _Dom2& __e2) : _Base(__e1, __e2) {}
    };

  template<class _Oper, typename _Tp>
    struct _BinClos<_Oper,_ValArray, _ValArray, _Tp, _Tp>
    : _BinBase<_Oper, valarray<_Tp>, valarray<_Tp> >
    {
      typedef _BinBase<_Oper, valarray<_Tp>, valarray<_Tp> > _Base;
      typedef _Tp value_type;

      _BinClos(const valarray<_Tp>& __v, const valarray<_Tp>& __w)
      : _Base(__v, __w) {}
    };

  template<class _Oper, class _Dom>
    struct _BinClos<_Oper, _Expr, _ValArray, _Dom, typename _Dom::value_type>
    : _BinBase<_Oper, _Dom, valarray<typename _Dom::value_type> >
    {
      typedef typename _Dom::value_type _Tp;
      typedef _BinBase<_Oper,_Dom,valarray<_Tp> > _Base;
      typedef typename _Base::value_type value_type;

      _BinClos(const _Dom& __e1, const valarray<_Tp>& __e2)
      : _Base(__e1, __e2) {}
    };

  template<class _Oper, class _Dom>
    struct _BinClos<_Oper, _ValArray, _Expr, typename _Dom::value_type, _Dom>
    : _BinBase<_Oper, valarray<typename _Dom::value_type>,_Dom>
    {
      typedef typename _Dom::value_type _Tp;
      typedef _BinBase<_Oper, valarray<_Tp>, _Dom> _Base;
      typedef typename _Base::value_type value_type;

      _BinClos(const valarray<_Tp>& __e1, const _Dom& __e2)
      : _Base(__e1, __e2) {}
    };

  template<class _Oper, class _Dom>
    struct _BinClos<_Oper, _Expr, _Constant, _Dom, typename _Dom::value_type>
    : _BinBase2<_Oper, _Dom>
    {
      typedef typename _Dom::value_type _Tp;
      typedef _BinBase2<_Oper,_Dom> _Base;
      typedef typename _Base::value_type value_type;

      _BinClos(const _Dom& __e1, const _Tp& __e2) : _Base(__e1, __e2) {}
    };

  template<class _Oper, class _Dom>
    struct _BinClos<_Oper, _Constant, _Expr, typename _Dom::value_type, _Dom>
    : _BinBase1<_Oper, _Dom>
    {
      typedef typename _Dom::value_type _Tp;
      typedef _BinBase1<_Oper, _Dom> _Base;
      typedef typename _Base::value_type value_type;

      _BinClos(const _Tp& __e1, const _Dom& __e2) : _Base(__e1, __e2) {}
    };

  template<class _Oper, typename _Tp>
    struct _BinClos<_Oper, _ValArray, _Constant, _Tp, _Tp>
    : _BinBase2<_Oper, valarray<_Tp> >
    {
      typedef _BinBase2<_Oper,valarray<_Tp> > _Base;
      typedef typename _Base::value_type value_type;

      _BinClos(const valarray<_Tp>& __v, const _Tp& __t) : _Base(__v, __t) {}
    };

  template<class _Oper, typename _Tp>
    struct _BinClos<_Oper, _Constant, _ValArray, _Tp, _Tp>
    : _BinBase1<_Oper, valarray<_Tp> >
    {
      typedef _BinBase1<_Oper, valarray<_Tp> > _Base;
      typedef typename _Base::value_type value_type;

      _BinClos(const _Tp& __t, const valarray<_Tp>& __v) : _Base(__t, __v) {}
    };

    //
    // slice_array closure.
    //
  template<typename _Dom> 
    class _SBase
    {
    public:
      typedef typename _Dom::value_type value_type;
      
      _SBase (const _Dom& __e, const slice& __s)
      : _M_expr (__e), _M_slice (__s) {}
        
      value_type
      operator[] (size_t __i) const
      { return _M_expr[_M_slice.start () + __i * _M_slice.stride ()]; }
        
      size_t
      size() const
      { return _M_slice.size (); }

    private:
      const _Dom& _M_expr;
      const slice& _M_slice;
    };

  template<typename _Tp>
    class _SBase<_Array<_Tp> >
    {
    public:
      typedef _Tp value_type;
      
      _SBase (_Array<_Tp> __a, const slice& __s)
      : _M_array (__a._M_data+__s.start()), _M_size (__s.size()),
	_M_stride (__s.stride()) {}
        
      value_type
      operator[] (size_t __i) const
      { return _M_array._M_data[__i * _M_stride]; }
      
      size_t
      size() const
      { return _M_size; }

    private:
      const _Array<_Tp> _M_array;
      const size_t _M_size;
      const size_t _M_stride;
    };

  template<class _Dom>
    struct _SClos<_Expr, _Dom>
    : _SBase<_Dom>
    {
      typedef _SBase<_Dom> _Base;
      typedef typename _Base::value_type value_type;
      
      _SClos (const _Dom& __e, const slice& __s) : _Base (__e, __s) {}
    };

  template<typename _Tp>
    struct _SClos<_ValArray, _Tp>
    : _SBase<_Array<_Tp> >
    {
      typedef  _SBase<_Array<_Tp> > _Base;
      typedef _Tp value_type;
      
      _SClos (_Array<_Tp> __a, const slice& __s) : _Base (__a, __s) {}
    };

} // std::

#endif /* _CPP_VALARRAY_BEFORE_H */

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// mode:c++
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