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-rw-r--r--libstdc++/std/valarray_meta.h1046
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diff --git a/libstdc++/std/valarray_meta.h b/libstdc++/std/valarray_meta.h
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+// The template and inlines for the -*- C++ -*- internal _Meta class.
+
+// Copyright (C) 1997-1999 Cygnus Solutions
+//
+// This file is part of the GNU ISO C++ Library. This library is free
+// software; you can redistribute it and/or modify it under the
+// terms of the GNU General Public License as published by the
+// Free Software Foundation; either version 2, 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 General Public License for more details.
+
+// You should have received a copy of the GNU General Public License along
+// with this library; see the file COPYING. If not, write to the Free
+// Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
+// USA.
+
+// As a special exception, you may use this file as part of a free software
+// library without restriction. Specifically, if other files instantiate
+// templates or use macros or inline functions from this file, or you compile
+// this file and link it with other files to produce an executable, this
+// file does not by itself cause the resulting executable to be covered by
+// the GNU General Public License. This exception does not however
+// invalidate any other reasons why the executable file might be covered by
+// the GNU General Public License.
+
+// Written by Gabriel Dos Reis <Gabriel.Dos-Reis@cmla.ens-cachan.fr>
+
+#ifndef _CPP_VALARRAY_META_H
+#define _CPP_VALARRAY_META_H 1
+
+//
+// Implementing a loosened valarray return value is tricky.
+// First we need to meet 26.3.1/3: we should not add more than
+// two levels of template nesting. Therefore we resort to template
+// template to "flatten" loosened return value types.
+// At some point we use partial specialization to remove one level
+// template nesting due to _Expr<>
+//
+
+
+// This class is NOT defined. It doesn't need to.
+template<typename _Tp1, typename _Tp2> class _Constant;
+
+//
+// Unary function application closure.
+//
+template<class _Dom> class _UnFunBase {
+public:
+ typedef typename _Dom::value_type value_type;
+ typedef value_type _Vt;
+
+ _UnFunBase (const _Dom& __e, _Vt __f(_Vt))
+ : _M_expr(__e), _M_func(__f) {}
+
+ _Vt operator[] (size_t __i) const { return _M_func(_M_expr[__i]); }
+ size_t size () const { return _M_expr.size(); }
+
+private:
+ const _Dom& _M_expr;
+ _Vt (*_M_func)(_Vt);
+};
+
+template<template<class, class> class _Meta, class _Dom> class _UnFunClos;
+
+template<class _Dom>
+struct _UnFunClos<_Expr,_Dom> : _UnFunBase<_Dom> {
+ typedef _UnFunBase<_Dom> _Base;
+ typedef typename _Base::value_type value_type;
+
+ _UnFunClos (const _Dom& __e, value_type __f(value_type))
+ : _Base (__e, __f) {}
+};
+
+template<typename _Tp>
+struct _UnFunClos<_ValArray,_Tp> : _UnFunBase<valarray<_Tp> > {
+ typedef _UnFunBase<valarray<_Tp> > _Base;
+ typedef typename _Base::value_type value_type;
+
+ _UnFunClos (const valarray<_Tp>& __v, _Tp __f(_Tp))
+ : _Base (__v, __f) {}
+};
+
+//
+// Binary function application closure.
+//
+template<template<class, class> class _Meta1,
+ template<class, class> class Meta2,
+ class _Dom1, class _Dom2> class _BinFunClos;
+
+template<class _Dom1, class _Dom2> class _BinFunBase {
+public:
+ typedef typename _Dom1::value_type value_type;
+ typedef value_type _Vt;
+
+ _BinFunBase (const _Dom1& __e1, const _Dom2& __e2,
+ _Vt __f (_Vt, _Vt))
+ : _M_expr1 (__e1), _M_expr2 (__e2), _M_func (__f) {}
+
+ value_type operator[] (size_t __i) const
+ { return _M_func (_M_expr1[__i], _M_expr2[__i]); }
+ size_t size () const { return _M_expr1.size (); }
+
+private:
+ const _Dom1& _M_expr1;
+ const _Dom2& _M_expr2;
+ _Vt (*_M_func)(_Vt, _Vt);
+};
+
+template<class _Dom> class _BinFunBase1 {
+public:
+ typedef typename _Dom::value_type value_type ;
+ typedef value_type _Vt;
+
+ _BinFunBase1 (const _Vt& __c, const _Dom& __e, _Vt __f(_Vt, _Vt))
+ : _M_expr1 (__c), _M_expr2 (__e), _M_func (__f) {}
+
+ value_type operator[] (size_t __i) const
+ { return _M_func (_M_expr1, _M_expr2[__i]); }
+ size_t size () const { return _M_expr2.size (); }
+
+private:
+ const _Vt& _M_expr1;
+ const _Dom& _M_expr2;
+ _Vt (*_M_func)(_Vt, _Vt);
+};
+
+template<class _Dom> class _BinFunBase2 {
+public:
+ typedef typename _Dom::value_type value_type;
+ typedef value_type _Vt;
+
+ _BinFunBase2 (const _Dom& __e, const _Vt& __c, _Vt __f(_Vt, _Vt))
+ : _M_expr1 (__e), _M_expr2 (__c), _M_func (__f) {}
+
+ value_type operator[] (size_t __i) const
+ { return _M_func (_M_expr1[__i], _M_expr2); }
+ size_t size () const { return _M_expr1.size (); }
+
+private:
+ const _Dom& _M_expr1;
+ const _Vt& _M_expr2;
+ _Vt (*_M_func)(_Vt, _Vt);
+};
+
+template<class _Dom1, class _Dom2>
+struct _BinFunClos<_Expr,_Expr,_Dom1,_Dom2> : _BinFunBase<_Dom1,_Dom2> {
+ typedef _BinFunBase<_Dom1,_Dom2> _Base;
+ typedef typename _Base::value_type value_type;
+ typedef value_type _Tp;
+
+ _BinFunClos (const _Dom1& __e1, const _Dom2& __e2,
+ _Tp __f(_Tp, _Tp))
+ : _Base (__e1, __e2, __f) {}
+};
+
+template<typename _Tp>
+struct _BinFunClos<_ValArray,_ValArray,_Tp,_Tp>
+ : _BinFunBase<valarray<_Tp>, valarray<_Tp> > {
+ typedef _BinFunBase<valarray<_Tp>, valarray<_Tp> > _Base;
+ typedef _Tp value_type;
+
+ _BinFunClos (const valarray<_Tp>& __v, const valarray<_Tp>& __w,
+ _Tp __f(_Tp, _Tp))
+ : _Base (__v, __w, __f) {}
+};
+
+template<class _Dom>
+struct _BinFunClos<_Expr,_ValArray,_Dom,typename _Dom::value_type>
+ : _BinFunBase<_Dom,valarray<typename _Dom::value_type> > {
+ typedef typename _Dom::value_type _Tp;
+ typedef _BinFunBase<_Dom,valarray<_Tp> > _Base;
+ typedef _Tp value_type;
+
+ _BinFunClos (const _Dom& __e, const valarray<_Tp>& __v,
+ _Tp __f(_Tp, _Tp))
+ : _Base (__e, __v, __f) {}
+};
+
+template<class _Dom>
+struct _BinFunClos<_ValArray,_Expr,typename _Dom::value_type,_Dom>
+ : _BinFunBase<valarray<typename _Dom::value_type>,_Dom> {
+ typedef typename _Dom::value_type _Tp;
+ typedef _BinFunBase<_Dom,valarray<_Tp> > _Base;
+ typedef _Tp value_type;
+
+ _BinFunClos (const valarray<_Tp>& __v, const _Dom& __e,
+ _Tp __f(_Tp, _Tp))
+ : _Base (__v, __e, __f) {}
+};
+
+template<class _Dom>
+struct _BinFunClos<_Expr,_Constant,_Dom,typename _Dom::value_type>
+ : _BinFunBase2<_Dom> {
+ typedef typename _Dom::value_type _Tp;
+ typedef _Tp value_type;
+ typedef _BinFunBase2<_Dom> _Base;
+
+ _BinFunClos (const _Dom& __e, const _Tp& __t, _Tp __f (_Tp, _Tp))
+ : _Base (__e, __t, __f) {}
+};
+
+template<class _Dom>
+struct _BinFunClos<_Constant,_Expr,_Dom,typename _Dom::value_type>
+ : _BinFunBase1<_Dom> {
+ typedef typename _Dom::value_type _Tp;
+ typedef _Tp value_type;
+ typedef _BinFunBase1<_Dom> _Base;
+
+ _BinFunClos (const _Tp& __t, const _Dom& __e, _Tp __f (_Tp, _Tp))
+ : _Base (__t, __e, __f) {}
+};
+
+template<typename _Tp>
+struct _BinFunClos<_ValArray,_Constant,_Tp,_Tp>
+ : _BinFunBase2<valarray<_Tp> > {
+ typedef _BinFunBase2<valarray<_Tp> > _Base;
+ typedef _Tp value_type;
+
+ _BinFunClos (const valarray<_Tp>& __v, const _Tp& __t,
+ _Tp __f(_Tp, _Tp))
+ : _Base (__v, __t, __f) {}
+};
+
+template<typename _Tp>
+struct _BinFunClos<_Constant,_ValArray,_Tp,_Tp>
+ : _BinFunBase1<valarray<_Tp> > {
+ typedef _BinFunBase1<valarray<_Tp> > _Base;
+ typedef _Tp value_type;
+
+ _BinFunClos (const _Tp& __t, const valarray<_Tp>& __v,
+ _Tp __f (_Tp, _Tp))
+ : _Base (__t, __v, __f) {}
+};
+
+//
+// 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<template<class> class _Oper, typename _Arg>
+class _UnBase {
+public:
+ typedef _Oper<typename _Arg::value_type> _Op;
+ typedef typename _Op::result_type value_type;
+
+ _UnBase (const _Arg& __e) : _M_expr(__e) {}
+ value_type operator[] (size_t) const;
+ size_t size () const { return _M_expr.size (); }
+
+private:
+ const _Arg& _M_expr;
+};
+
+template<template<class> class _Oper, typename _Arg>
+inline typename _UnBase<_Oper, _Arg>::value_type
+_UnBase<_Oper, _Arg>::operator[] (size_t __i) const
+{ return _Op() (_M_expr[__i]); }
+
+template<template<class> 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<template<class> 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<template<class> class _Oper, typename _FirstArg, typename _SecondArg>
+class _BinBase {
+public:
+ typedef _Oper<typename _FirstArg::value_type> _Op;
+ typedef typename _Op::result_type value_type;
+
+ _BinBase (const _FirstArg& __e1, const _SecondArg& __e2)
+ : _M_expr1 (__e1), _M_expr2 (__e2) {}
+ value_type operator[] (size_t) const;
+ size_t size () const { return _M_expr1.size (); }
+
+private:
+ const _FirstArg& _M_expr1;
+ const _SecondArg& _M_expr2;
+};
+
+template<template<class> class _Oper, typename _FirstArg, typename _SecondArg>
+inline typename _BinBase<_Oper,_FirstArg,_SecondArg>::value_type
+_BinBase<_Oper,_FirstArg,_SecondArg>::operator[] (size_t __i) const
+{ return _Op() (_M_expr1[__i], _M_expr2[__i]); }
+
+
+template<template<class> class _Oper, class _Clos>
+class _BinBase2 {
+public:
+ typedef typename _Clos::value_type _Vt;
+ typedef _Oper<_Vt> _Op;
+ typedef typename _Op::result_type value_type;
+
+ _BinBase2 (const _Clos& __e, const _Vt& __t)
+ : _M_expr1 (__e), _M_expr2 (__t) {}
+ value_type operator[] (size_t) const;
+ size_t size () const { return _M_expr1.size (); }
+
+private:
+ const _Clos& _M_expr1;
+ const _Vt& _M_expr2;
+};
+
+template<template<class> class _Oper, class _Clos>
+inline typename _BinBase2<_Oper,_Clos>::value_type
+_BinBase2<_Oper,_Clos>::operator[] (size_t __i) const
+{ return _Op() (_M_expr1[__i], _M_expr2); }
+
+
+template<template<class> class _Oper, class _Clos>
+class _BinBase1 {
+public:
+ typedef typename _Clos::value_type _Vt;
+ typedef _Oper<_Vt> _Op;
+ typedef typename _Op::result_type value_type;
+
+ _BinBase1 (const _Vt& __t, const _Clos& __e)
+ : _M_expr1 (__t), _M_expr2 (__e) {}
+ value_type operator[] (size_t) const;
+ size_t size () const { return _M_expr2.size (); }
+
+private:
+ const _Vt& _M_expr1;
+ const _Clos& _M_expr2;
+};
+
+template<template<class> class _Oper, class _Clos>
+inline typename
+_BinBase1<_Oper,_Clos>::value_type
+_BinBase1<_Oper,_Clos>:: operator[] (size_t __i) const
+{ return _Op() (_M_expr1, _M_expr2[__i]); }
+
+
+template<template<class> 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<template<class> 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<template<class> 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<template<class> 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<template<class> 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<template<class> 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<template<class> 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<template<class> 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) {}
+};
+
+//
+// gslice_array closure.
+//
+template<class _Dom> class _GBase {
+public:
+ typedef typename _Dom::value_type value_type;
+
+ _GBase (const _Dom& __e, const valarray<size_t>& __i)
+ : _M_expr (__e), _M_index(__i) {}
+ value_type operator[] (size_t __i) const
+ { return _M_expr[_M_index[__i]]; }
+ size_t size () const { return _M_index.size(); }
+
+private:
+ const _Dom& _M_expr;
+ const valarray<size_t>& _M_index;
+};
+
+template<typename _Tp> class _GBase<_Array<_Tp> > {
+public:
+ typedef _Tp value_type;
+
+ _GBase (_Array<_Tp> __a, const valarray<size_t>& __i)
+ : _M_array (__a), _M_index(__i) {}
+ value_type operator[] (size_t __i) const
+ { return _M_array._M_data[_M_index[__i]]; }
+ size_t size () const { return _M_index.size(); }
+
+private:
+ const _Array<_Tp> _M_array;
+ const valarray<size_t>& _M_index;
+};
+
+template<class _Dom> struct _GClos<_Expr,_Dom> : _GBase<_Dom> {
+ typedef _GBase<_Dom> _Base;
+ typedef typename _Base::value_type value_type;
+
+ _GClos (const _Dom& __e, const valarray<size_t>& __i)
+ : _Base (__e, __i) {}
+};
+
+template<typename _Tp>
+struct _GClos<_ValArray,_Tp> : _GBase<_Array<_Tp> > {
+ typedef _GBase<_Array<_Tp> > _Base;
+ typedef typename _Base::value_type value_type;
+
+ _GClos (_Array<_Tp> __a, const valarray<size_t>& __i)
+ : _Base (__a, __i) {}
+};
+
+//
+// indirect_array closure
+//
+
+template<class _Dom> class _IBase {
+public:
+ typedef typename _Dom::value_type value_type;
+
+ _IBase (const _Dom& __e, const valarray<size_t>& __i)
+ : _M_expr (__e), _M_index (__i) {}
+ value_type operator[] (size_t __i) const
+ { return _M_expr[_M_index[__i]]; }
+ size_t size() const { return _M_index.size(); }
+
+private:
+ const _Dom& _M_expr;
+ const valarray<size_t>& _M_index;
+};
+
+template<class _Dom> struct _IClos<_Expr,_Dom> : _IBase<_Dom> {
+ typedef _IBase<_Dom> _Base;
+ typedef typename _Base::value_type value_type;
+
+ _IClos (const _Dom& __e, const valarray<size_t>& __i)
+ : _Base (__e, __i) {}
+};
+
+template<typename _Tp>
+struct _IClos<_ValArray,_Tp> : _IBase<valarray<_Tp> > {
+ typedef _IBase<valarray<_Tp> > _Base;
+ typedef _Tp value_type;
+
+ _IClos (const valarray<_Tp>& __a, const valarray<size_t>& __i)
+ : _Base (__a, __i) {}
+};
+
+//
+// class _Expr
+//
+template<class _Clos, typename _Tp> class _Expr {
+public:
+ typedef _Tp value_type;
+
+ _Expr (const _Clos&);
+
+ const _Clos& operator() () const;
+
+ value_type operator[] (size_t) const;
+ valarray<value_type> operator[] (slice) const;
+ valarray<value_type> operator[] (const gslice&) const;
+ valarray<value_type> operator[] (const valarray<bool>&) const;
+ valarray<value_type> operator[] (const valarray<size_t>&) const;
+
+ _Expr<_UnClos<_Unary_plus,_Expr,_Clos>, value_type>
+ operator+ () const;
+
+ _Expr<_UnClos<negate,_Expr,_Clos>, value_type>
+ operator- () const;
+
+ _Expr<_UnClos<_Bitwise_not,_Expr,_Clos>, value_type>
+ operator~ () const;
+
+ _Expr<_UnClos<logical_not,_Expr,_Clos>, bool>
+ operator! () const;
+
+ size_t size () const;
+ value_type sum () const;
+
+ valarray<value_type> shift (int) const;
+ valarray<value_type> cshift (int) const;
+// _Meta<_ApplyFunctionWithValue<_Expr>, value_type>
+// apply (value_type _M_func (value_type)) const;
+// _Meta<_ApplyFunctionWithConstRef<_Expr>, value_type>
+// apply (value_type _M_func (const value_type&)) const;
+
+private:
+ const _Clos _M_closure;
+};
+
+template<class _Clos, typename _Tp>
+inline
+_Expr<_Clos,_Tp>::_Expr (const _Clos& __c) : _M_closure(__c) {}
+
+template<class _Clos, typename _Tp>
+inline const _Clos&
+_Expr<_Clos,_Tp>::operator() () const
+{ return _M_closure; }
+
+template<class _Clos, typename _Tp>
+inline _Tp
+_Expr<_Clos,_Tp>::operator[] (size_t __i) const
+{ return _M_closure[__i]; }
+
+template<class _Clos, typename _Tp>
+inline valarray<_Tp>
+_Expr<_Clos,_Tp>::operator[] (slice __s) const
+{ return _M_closure[__s]; }
+
+template<class _Clos, typename _Tp>
+inline valarray<_Tp>
+_Expr<_Clos,_Tp>::operator[] (const gslice& __gs) const
+{ return _M_closure[__gs]; }
+
+template<class _Clos, typename _Tp>
+inline valarray<_Tp>
+_Expr<_Clos,_Tp>::operator[] (const valarray<bool>& __m) const
+{ return _M_closure[__m]; }
+
+template<class _Clos, typename _Tp>
+inline valarray<_Tp>
+_Expr<_Clos,_Tp>::operator[] (const valarray<size_t>& __i) const
+{ return _M_closure[__i]; }
+
+template<class _Clos, typename _Tp>
+inline size_t
+_Expr<_Clos,_Tp>::size () const { return _M_closure.size (); }
+
+// XXX: replace this with a more robust summation algorithm.
+template<class _Clos, typename _Tp>
+inline _Tp
+_Expr<_Clos,_Tp>::sum () const
+{
+ _Tp __s(_Tp());
+ size_t __n (_M_closure.size ());
+ for (size_t __i=0; __i<__n; ++__i) __s += _M_closure[__i];
+ return __s;
+}
+
+template<class _Dom, typename _Tp>
+inline _Tp
+min (const _Expr<_Dom,_Tp>& __e)
+{
+ size_t __s (__e.size ());
+ _Tp __m (__e[0]);
+ for (size_t __i=1; __i<__s; ++__i)
+ if (__m > __e[__i]) __m = __e[__i];
+ return __m;
+}
+
+template<class _Dom, typename _Tp>
+inline _Tp
+max (const _Expr<_Dom,_Tp>& __e)
+{
+ size_t __s (__e.size());
+ _Tp __m (__e[0]);
+ for (size_t __i=1; __i<__s; ++__i)
+ if (__m < __e[__i]) __m = __e[__i];
+ return __m;
+}
+
+template<class _Dom, typename _Tp>
+inline _Expr<_UnClos<logical_not,_Expr,_Dom>, bool>
+_Expr<_Dom,_Tp>::operator! () const
+{
+ typedef _UnClos<logical_not,_Expr,_Dom> _Closure;
+ return _Expr<_Closure,_Tp> (_Closure(this->_M_closure));
+}
+
+#define _DEFINE_EXPR_UNARY_OPERATOR(_Op, _Name) \
+template<class _Dom, typename _Tp> \
+inline _Expr<_UnClos<_Name,_Expr,_Dom>,_Tp> \
+_Expr<_Dom,_Tp>::operator##_Op () const \
+{ \
+ typedef _UnClos<_Name,_Expr,_Dom> _Closure; \
+ return _Expr<_Closure,_Tp> (_Closure (this->_M_closure)); \
+}
+
+ _DEFINE_EXPR_UNARY_OPERATOR(+, _Unary_plus)
+ _DEFINE_EXPR_UNARY_OPERATOR(-, negate)
+ _DEFINE_EXPR_UNARY_OPERATOR(~, _Bitwise_not)
+
+#undef _DEFINE_EXPR_UNARY_OPERATOR
+
+
+#define _DEFINE_EXPR_BINARY_OPERATOR(_Op, _Name) \
+template<class _Dom1, class _Dom2> \
+inline _Expr<_BinClos<_Name,_Expr,_Expr,_Dom1,_Dom2>, \
+ typename _Name<typename _Dom1::value_type>::result_type> \
+operator##_Op (const _Expr<_Dom1,typename _Dom1::value_type>& __v, \
+ const _Expr<_Dom2,typename _Dom2::value_type>& __w) \
+{ \
+ typedef typename _Dom1::value_type _Arg; \
+ typedef typename _Name<_Arg>::result_type _Value; \
+ typedef _BinClos<_Name,_Expr,_Expr,_Dom1,_Dom2> _Closure; \
+ return _Expr<_Closure,_Value> (_Closure (__v (), __w ())); \
+} \
+ \
+template<class _Dom> \
+inline _Expr<_BinClos<_Name,_Expr,_Constant,_Dom,typename _Dom::value_type>, \
+ typename _Name<typename _Dom::value_type>::result_type> \
+operator##_Op (const _Expr<_Dom,typename _Dom::value_type>& __v, \
+ const typename _Dom::value_type& __t) \
+{ \
+ typedef typename _Dom::value_type _Arg; \
+ typedef typename _Name<_Arg>::result_type _Value; \
+ typedef _BinClos<_Name,_Expr,_Constant,_Dom,_Arg> _Closure; \
+ return _Expr<_Closure,_Value> (_Closure (__v (), __t)); \
+} \
+ \
+template<class _Dom> \
+inline _Expr<_BinClos<_Name,_Constant,_Expr,typename _Dom::value_type,_Dom>, \
+ typename _Name<typename _Dom::value_type>::result_type> \
+operator##_Op (const typename _Dom::value_type& __t, \
+ const _Expr<_Dom,typename _Dom::value_type>& __v) \
+{ \
+ typedef typename _Dom::value_type _Arg; \
+ typedef typename _Name<_Arg>::result_type _Value; \
+ typedef _BinClos<_Name,_Constant,_Expr,_Arg,_Dom> _Closure; \
+ return _Expr<_Closure,_Value> (_Closure (__t, __v ())); \
+} \
+ \
+template<class _Dom> \
+inline _Expr<_BinClos<_Name,_Expr,_ValArray,_Dom,typename _Dom::value_type>, \
+ typename _Name<typename _Dom::value_type>::result_type> \
+operator##_Op (const _Expr<_Dom,typename _Dom::value_type>& __e, \
+ const valarray<typename _Dom::value_type>& __v) \
+{ \
+ typedef typename _Dom::value_type _Arg; \
+ typedef typename _Name<_Arg>::result_type _Value; \
+ typedef _BinClos<_Name,_Expr,_ValArray,_Dom,_Arg> _Closure; \
+ return _Expr<_Closure,_Value> (_Closure (__e (), __v)); \
+} \
+ \
+template<class _Dom> \
+inline _Expr<_BinClos<_Name,_ValArray,_Expr,typename _Dom::value_type,_Dom>, \
+ typename _Name<typename _Dom::value_type>::result_type> \
+operator##_Op (const valarray<typename _Dom::value_type>& __v, \
+ const _Expr<_Dom,typename _Dom::value_type>& __e) \
+{ \
+ typedef typename _Dom::value_type _Tp; \
+ typedef typename _Name<_Tp>::result_type _Value; \
+ typedef _BinClos<_Name,_ValArray,_Expr,_Tp,_Dom> _Closure; \
+ return _Expr<_Closure,_Value> (_Closure (__v, __e ())); \
+}
+
+ _DEFINE_EXPR_BINARY_OPERATOR(+, plus)
+ _DEFINE_EXPR_BINARY_OPERATOR(-, minus)
+ _DEFINE_EXPR_BINARY_OPERATOR(*, multiplies)
+ _DEFINE_EXPR_BINARY_OPERATOR(/, divides)
+ _DEFINE_EXPR_BINARY_OPERATOR(%, modulus)
+ _DEFINE_EXPR_BINARY_OPERATOR(^, _Bitwise_xor)
+ _DEFINE_EXPR_BINARY_OPERATOR(&, _Bitwise_and)
+ _DEFINE_EXPR_BINARY_OPERATOR(|, _Bitwise_or)
+ _DEFINE_EXPR_BINARY_OPERATOR(<<, _Shift_left)
+ _DEFINE_EXPR_BINARY_OPERATOR(>>, _Shift_right)
+
+#undef _DEFINE_EXPR_BINARY_OPERATOR
+
+#define _DEFINE_EXPR_RELATIONAL_OPERATOR(_Op, _Name) \
+template<class _Dom1, class _Dom2> \
+inline _Expr<_BinClos<_Name,_Expr,_Expr,_Dom1,_Dom2>, bool> \
+operator##_Op (const _Expr<_Dom1,typename _Dom1::value_type>& __v, \
+ const _Expr<_Dom2,typename _Dom2::value_type>& __w) \
+{ \
+ typedef typename _Dom1::value_type _Arg; \
+ typedef _BinClos<_Name,_Expr,_Expr,_Dom1,_Dom2> _Closure; \
+ return _Expr<_Closure,bool> (_Closure (__v (), __w ())); \
+} \
+ \
+template<class _Dom> \
+inline _Expr<_BinClos<_Name,_Expr,_Constant,_Dom,typename _Dom::value_type>, \
+ bool> \
+operator##_Op (const _Expr<_Dom,typename _Dom::value_type>& __v, \
+ const typename _Dom::value_type& __t) \
+{ \
+ typedef typename _Dom::value_type _Arg; \
+ typedef _BinClos<_Name,_Expr,_Constant,_Dom,_Arg> _Closure; \
+ return _Expr<_Closure,bool> (_Closure (__v (), __t)); \
+} \
+ \
+template<class _Dom> \
+inline _Expr<_BinClos<_Name,_Constant,_Expr,typename _Dom::value_type,_Dom>, \
+ bool> \
+operator##_Op (const typename _Dom::value_type& __t, \
+ const _Expr<_Dom,typename _Dom::value_type>& __v) \
+{ \
+ typedef typename _Dom::value_type _Arg; \
+ typedef _BinClos<_Name,_Constant,_Expr,_Arg,_Dom> _Closure; \
+ return _Expr<_Closure,bool> (_Closure (__t, __v ())); \
+} \
+ \
+template<class _Dom> \
+inline _Expr<_BinClos<_Name,_Expr,_ValArray,_Dom,typename _Dom::value_type>, \
+ bool> \
+operator##_Op (const _Expr<_Dom,typename _Dom::value_type>& __e, \
+ const valarray<typename _Dom::value_type>& __v) \
+{ \
+ typedef typename _Dom::value_type _Tp; \
+ typedef _BinClos<_Name,_Expr,_ValArray,_Dom,_Tp> _Closure; \
+ return _Expr<_Closure,bool> (_Closure (__e (), __v)); \
+} \
+ \
+template<class _Dom> \
+inline _Expr<_BinClos<_Name,_ValArray,_Expr,typename _Dom::value_type,_Dom>, \
+ bool> \
+operator##_Op (const valarray<typename _Dom::value_type>& __v, \
+ const _Expr<_Dom,typename _Dom::value_type>& __e) \
+{ \
+ typedef typename _Dom::value_type _Tp; \
+ typedef _BinClos<_Name,_ValArray,_Expr,_Tp,_Dom> _Closure; \
+ return _Expr<_Closure,bool> (_Closure (__v, __e ())); \
+}
+
+ _DEFINE_EXPR_RELATIONAL_OPERATOR(&&, logical_and)
+ _DEFINE_EXPR_RELATIONAL_OPERATOR(||, logical_or)
+ _DEFINE_EXPR_RELATIONAL_OPERATOR(==, equal_to)
+ _DEFINE_EXPR_RELATIONAL_OPERATOR(!=, not_equal_to)
+ _DEFINE_EXPR_RELATIONAL_OPERATOR(<, less)
+ _DEFINE_EXPR_RELATIONAL_OPERATOR(>, greater)
+ _DEFINE_EXPR_RELATIONAL_OPERATOR(<=, less_equal)
+ _DEFINE_EXPR_RELATIONAL_OPERATOR(>=, greater_equal)
+
+#undef _DEFINE_EXPR_RELATIONAL_OPERATOR
+
+
+
+#define _DEFINE_EXPR_UNARY_FUNCTION(_Name) \
+template<class _Dom> \
+inline _Expr<_UnFunClos<_Expr,_Dom>,typename _Dom::value_type> \
+_Name(const _Expr<_Dom,typename _Dom::value_type>& __e) \
+{ \
+ typedef typename _Dom::value_type _Tp; \
+ typedef _UnFunClos<_Expr,_Dom> _Closure; \
+ return _Expr<_Closure,_Tp>(_Closure(__e(), (_Tp(*)(_Tp))(&_Name))); \
+} \
+ \
+template<typename _Tp> \
+inline _Expr<_UnFunClos<_ValArray,_Tp>,_Tp> \
+_Name(const valarray<_Tp>& __v) \
+{ \
+ typedef _UnFunClos<_ValArray,_Tp> _Closure; \
+ return _Expr<_Closure,_Tp> (_Closure (__v, (_Tp(*)(_Tp))(&_Name))); \
+}
+
+
+ _DEFINE_EXPR_UNARY_FUNCTION(abs)
+ _DEFINE_EXPR_UNARY_FUNCTION(cos)
+ _DEFINE_EXPR_UNARY_FUNCTION(acos)
+ _DEFINE_EXPR_UNARY_FUNCTION(cosh)
+ _DEFINE_EXPR_UNARY_FUNCTION(sin)
+ _DEFINE_EXPR_UNARY_FUNCTION(asin)
+ _DEFINE_EXPR_UNARY_FUNCTION(sinh)
+ _DEFINE_EXPR_UNARY_FUNCTION(tan)
+ _DEFINE_EXPR_UNARY_FUNCTION(tanh)
+ _DEFINE_EXPR_UNARY_FUNCTION(atan)
+ _DEFINE_EXPR_UNARY_FUNCTION(exp)
+ _DEFINE_EXPR_UNARY_FUNCTION(log)
+ _DEFINE_EXPR_UNARY_FUNCTION(log10)
+ _DEFINE_EXPR_UNARY_FUNCTION(sqrt)
+
+#undef _DEFINE_EXPR_UNARY_FUNCTION
+
+
+#define _DEFINE_EXPR_BINARY_FUNCTION(_Name) \
+template<class _Dom1, class _Dom2> \
+inline _Expr<_BinFunClos<_Expr,_Expr,_Dom1,_Dom2>,typename _Dom1::value_type>\
+_Name (const _Expr<_Dom1,typename _Dom1::value_type>& __e1, \
+ const _Expr<_Dom2,typename _Dom2::value_type>& __e2) \
+{ \
+ typedef typename _Dom1::value_type _Tp; \
+ typedef _BinFunClos<_Expr,_Expr,_Dom1,_Dom2> _Closure; \
+ return _Expr<_Closure,_Tp> \
+ (_Closure (__e1 (), __e2 (), (_Tp(*)(_Tp, _Tp))(&_Name))); \
+} \
+ \
+template<class _Dom> \
+inline _Expr<_BinFunClos<_Expr,_ValArray,_Dom,typename _Dom::value_type>, \
+ typename _Dom::value_type> \
+_Name (const _Expr<_Dom,typename _Dom::value_type>& __e, \
+ const valarray<typename _Dom::value_type>& __v) \
+{ \
+ typedef typename _Dom::value_type _Tp; \
+ typedef _BinFunClos<_Expr,_ValArray,_Dom,_Tp> _Closure; \
+ return _Expr<_Closure,_Tp> \
+ (_Closure (__e (), __v, (_Tp(*)(_Tp, _Tp))(&_Name))); \
+} \
+ \
+template<class _Dom> \
+inline _Expr<_BinFunClos<_ValArray,_Expr,typename _Dom::value_type,_Dom>, \
+ typename _Dom::value_type> \
+_Name (const valarray<typename _Dom::valarray>& __v, \
+ const _Expr<_Dom,typename _Dom::value_type>& __e) \
+{ \
+ typedef typename _Dom::value_type _Tp; \
+ typedef _BinFunClos<_ValArray,_Expr,_Tp,_Dom> _Closure; \
+ return _Expr<_Closure,_Tp> \
+ (_Closure (__v, __e (), (_Tp(*)(_Tp, _Tp))(&_Name))); \
+} \
+ \
+template<class _Dom> \
+inline _Expr<_BinFunClos<_Expr,_Constant,_Dom,typename _Dom::value_type>, \
+ typename _Dom::value_type> \
+_Name (const _Expr<_Dom, typename _Dom::value_type>& __e, \
+ const typename _Dom::value_type& __t) \
+{ \
+ typedef typename _Dom::value_type _Tp; \
+ typedef _BinFunClos<_Expr,_Constant,_Dom,_Tp> _Closure; \
+ return _Expr<_Closure,_Tp> \
+ (_Closure (__e (), __t, (_Tp(*)(_Tp, _Tp))(&_Name))); \
+} \
+ \
+template<class _Dom> \
+inline _Expr<_BinFunClos<_Constant,_Expr,typename _Dom::value_type,_Dom>, \
+ typename _Dom::value_type> \
+_Name (const typename _Dom::value_type& __t, \
+ const _Expr<_Dom,typename _Dom::value_type>& __e) \
+{ \
+ typedef typename _Dom::value_type _Tp; \
+ typedef _BinFunClos<_Constant,_Expr,_Tp,_Dom> _Closure; \
+ return _Expr<_Closure,_Tp> \
+ (_Closure (__t, __e (), (_Tp(*)(_Tp, _Tp))(&_Name))); \
+} \
+ \
+template<typename _Tp> \
+inline _Expr<_BinFunClos<_ValArray,_ValArray,_Tp,_Tp>, _Tp> \
+_Name (const valarray<_Tp>& __v, const valarray<_Tp>& __w) \
+{ \
+ typedef _BinFunClos<_ValArray,_ValArray,_Tp,_Tp> _Closure; \
+ return _Expr<_Closure,_Tp> \
+ (_Closure (__v, __w, (_Tp(*)(_Tp,_Tp))(&_Name))); \
+} \
+ \
+template<typename _Tp> \
+inline _Expr<_BinFunClos<_ValArray,_Constant,_Tp,_Tp>,_Tp> \
+_Name (const valarray<_Tp>& __v, const _Tp& __t) \
+{ \
+ typedef _BinFunClos<_ValArray,_Constant,_Tp,_Tp> _Closure; \
+ return _Expr<_Closure,_Tp> \
+ (_Closure (__v, __t, (_Tp(*)(_Tp,_Tp))(&_Name))); \
+} \
+ \
+template<typename _Tp> \
+inline _Expr<_BinFunClos<_Constant,_ValArray,_Tp,_Tp>,_Tp> \
+_Name (const _Tp& __t, const valarray<_Tp>& __v) \
+{ \
+ typedef _BinFunClos<_Constant,_ValArray,_Tp,_Tp> _Closure; \
+ return _Expr<_Closure,_Tp> \
+ (_Closure (__t, __v, (_Tp(*)(_Tp,_Tp))(&_Name))); \
+}
+
+_DEFINE_EXPR_BINARY_FUNCTION(atan2)
+_DEFINE_EXPR_BINARY_FUNCTION(pow)
+
+#undef _DEFINE_EXPR_BINARY_FUNCTION
+
+#endif // _CPP_VALARRAY_META_H
+
+// Local Variables:
+// mode:c++
+// End: